MP5414DV [MPS]
PMU for 3D Glasses; PMU的3D眼镜
| 型号： | MP5414DV |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | PMU for 3D Glasses |
| 文件： | 总22页 (文件大小：687K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP5414
PMU for 3D Glasses
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP5414 is a highly-efficient fully-integrated
PMU with a current-mode step-up converter,
four single-pole/double-throw switches, low
drop-out, and a battery charger designed for
battery-powered supply applications.
BOOST
•
•
•
•
1.8V Low Voltage Start-Up
1.8V to 5.5V Input Range
Output Disconnect
Integrated Power MOSFET and Schottky
Diode
The step-up converter can start-up from an
input voltage as low as 1.8V. It uses a current-
limited variable-frequency control algorithm to
optimize efficiency and minimize external
component size and cost. The internal low-
resistance N-Channel MOSFET switch can
withstand up to 10V, allowing the MP5414 to
produce a high output voltage with high
efficiency from a dual-cell NiCd/NiMH or single-
cell Li-ion battery. In addition, the step-up
converter can disconnect all loads from the
input DC power supply.
•
•
•
Variable Frequency Control
<1μA Shutdown Current
Current Mode Control with Internal
Compensation
•
•
Inrush Current Limiting and Internal Soft-
Start
Input Under-Voltage Lockout
CHARGER
•
•
•
•
•
•
0.75% VBATT Accuracy
Low Reverse-Battery Current (< 1µA)
Programmable Charge Current
Charge Status Indication
No External Sense Resistor
No External Reverse Blocking Diode
The charger features constant-current and
constant-voltage charging modes with
a
programmable charge current (50mA to
300mA), trickle-charge capability, and a charge-
status indicator. Charging is enabled with an
input voltage greater than 3.5V, and is disabled
when unplugged from the AC adaptor. The
charger does not need an external reverse-
blocking diode.
LINEAR REGULATOR
•
•
Low 100mV Dropout at 100mA Output
Programmable Output Voltage with 2%
Accuracy
•
•
•
•
Up to 6.5V Input Voltage
High PSRR: 70dB at 1kHz
Better Than 0.001%/mA Load Regulation
Stable With Low-ESR Output Capacitor
The low-dropout linear regulator operates with
low noise from a 2.7V-to-6.5V input voltage,
and regulates the output voltage with 2%
accuracy from 1.25V to 5V.
APPLICATIONS
The MP5414 is available in a 4mm x 5mm 28-
pin QFN package.
•
2-Cell and 3-Cell NiCd/NiMH or Single-cell
Li-Ion Battery Consumer Products
3D Glass Driver
•
•
•
•
Small LCD Displays Bias Supply
Digital Still and Video Cameras
Smartphones, Netbooks, and Handheld
Video Game Consoles
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithic
Power Systems, Inc.
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
1
MP5414—PMU FOR 3D GLASSES
TYPICAL APPLICATION
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
2
MP5414—PMU FOR 3D GLASSES
ORDERING INFORMATION
Part Number*
Package
Top Marking
MP5414DV
QFN28 (4x5mm)
MP5414
* For Tape & Reel, add suffix –Z (e.g. MP5414DV–Z);
For RoHS Compliant Packaging, add suffix –LF (e.g. MP5414DV–LF–Z)
PACKAGE REFERENCE
TOP VIEW
28
27 26
25
24 23
S2
S1
1
2
3
4
5
6
7
8
22
21
20
19
18
17
16
15
BSTEN
BSTL
BSTFB
BSTISET
BSTGND
BSTIN
BSTOUT
BATT
IPGM
BSTSW
CHGGND
CHGIN
LDOFB
LDOOUT
9
10 11
12 13 14
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
3
MP5414—PMU FOR 3D GLASSES
ABSOLUTE MAXIMUM RATINGS (1)
Thermal Resistance (4)
θJA
θJC
BSTSW, A, B, C, D to BSTGND ...-0.5V to +12V
CHGIN to CHGGND .....................-0.3V to +25V
LDOIN to LDOGND......................-0.3V to +7.0V
LDOFB to LDOGND.... -0.3V to (VLDOOUT + 0.3V)
All other Pins................................-0.3V to +6.0V
Continuous Power Dissipation (TA = 25°C) (2)
............................................................ 3.1 W
Junction Temperature...............................140°C
Lead Temperature ....................................260°C
Storage Temperature............... -65°C to +150°C
QFN28 (4x5mm) ....................40 ....... 9....°C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ(MAX), the junction-to-
ambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD(MAX)=(TJ(MAX)-
TA)/ θJA. Exceeding the maximum allowable power dissipation
will cause excessive die temperature, and the regulator will go
into thermal shutdown. Internal thermal shutdown circuitry
protects the device from permanent damage.
3) The device is not guaranteed to function outside of its
operation conditions.
4) Measured on JESD51-7 4-layer board.
Recommended Operating Conditions (3)
VBSTIN .............................................1.8V to 5.5V
VBSTOUT .......................................... VBSTIN to 10V
VCHGIN .........................................4.75V to 5.25V
V
V
LDOIN ..............................................2.7V to 6.5V
LDOOUT .............................................1.25V to 5V
I
LDOOUT .....................................250mA Maximum
Operating Junction Temp. (TJ). -40°C to +125°C
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
4
MP5414—PMU FOR 3D GLASSES
ELECTRICAL CHARACTERISTICS
VBSTIN = 2.4V, VBSTOUT=10V, IBSTOUT=2mA, VCHGIN = VLDOIN = 5V, TA = 25°C, unless otherwise noted.
Parameters
Symbol Condition
Min
Typ Max Units
Step-Up Converter
Operating Input Voltage
Minimum Startup Voltage
VBSTIN
1.8
5.5
1.8
V
V
VBSTST
IBSTQ_NS
IBSTSD
VBSTOUT=0V
BSTOUT=0, VBSTFB=1.3V,
No switching
I
Quiescent Current
28
50
µA
Shutdown Current
VBSTEN=0V
0.1
1
µA
V
IN Under Voltage Lockout
VBSTUVLO VBSTIN Rising
1.58
1.7
Under Voltage Lockout
Hysteresis
100
mV
Maximum On Time
Minimum Off Time
SW On-Resistance
SW Leakage Current
SW Current Limit
TBSTON
4
6
7.5
700
0.8
2
µs
ns
TBSTOFF
400
550
0.73
RBSTDS_ON IBSTSW = 200mA
IBSTSW_LKG VBSTSW=12V
IBSTSW_LIMIT RBSTISET=300kΩ
Ω
µA
mA
180
0.5
Schottky Diode Forward
Voltage
VBSTFW
IBSTFW=100mA
0.4
9.7
0.6
V
V
Let BSTFB pin floating,
1.8V<VBSTIN<5.5V
Fixed OUT Supply Voltage
VBSTOUT_FD
10
10.3
Connect R-divider to BSTFB,
1.8V<VBSTIN<5.5V
FB Voltage (Regulation Mode)
FB Input Bias Current
VBSTFB
IBSTFB
1.20 1.23 1.26
1
V
µA
Ω
VBSTFB = 1.23V
Output Disconnect Switch On-
Resistance
RDISC_ON VBSTOUT=10V
0.7
0.8
Thermal Shutdown
Charger
150
°C
Supply Current from VIN
Input UVLO
ISUPPLY
ICHG = 0A,
0.5
2.3
mA
V
Input falling
1.8
2.8
2
Battery Reverse Current to
BATT Pin
Input=GND or float, VBAT=4V
µA
V
Battery Voltage Regulation
VBATT
TA = 0°C to +50°C, ICHG = 5mA
4.16 4.20 4.24
VCHGIN = 5V, VBATT = 3.8V
RPGM = 1.6kΩ
225
250
275
mA
Constant Current Regulation
ICHG
VCHGIN = 5V, VBATT = 3.8V,
%ICHG
R
PGM = 1.5kΩ – 7.2kΩ,
90
100
110
(5)
-40°C < TA < +85°C
VCHGIN = 5V, VBATT = 2.3V
VBATT Rising
Trickle Current
5
10
2.6
190
10
15 %ICHG
Trickle Threshold Voltage
Trickle Voltage Hysteresis
CHGZ Low-to-High Threshold
CHGZ Sink Current
2.45
2.75
V
mV
%ICHG
mA
Pin Voltage = 0.2 V
5
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
5
MP5414—PMU FOR 3D GLASSES
ELECTRICAL CHARACTERISTICS (continued)
VBSTIN = 2.4V, VBSTOUT=10V, IBSTOUT=2mA, VCHGIN = VLDOIN = 5V, TA = 25°C, unless otherwise noted.
Parameters
Symbol Condition
Min
Typ Max Units
VCHGIN
VBATT
-
VBATT = 3.8V, ICHG = 150mA,
Current drop 10%
Dropout Voltage
0.25
V
Overcharge Protection
Thermal Limit (6)
LDO
VBATT = 4.25V
0
μA
130
°C
Operating Voltage
Ground Pin Current
Shutdown Current
ILDOOUT = 1mA
2.7
6.5
155
1
V
ILDOOUT = 1mA–250mA
VLDOEN = 0V, VLDOIN = 5V
125
0.1
μA
μA
1.197 1.222 1.246
FB Regulation Voltage
Dropout Voltage (7)
V
1.194 1.222 1.249
-40°C ≤ TA ≤ +85°C
VLDOOUT = 3V, ILDOOUT = 150mA
150
125
mV
VLDOOUT = 4V, ILDOOUT = 150mA
f = 1kHz, CLDOFB > 0.1μF,
ILDOOUT = 1mA
nV/√
Hz
Output Voltage Noise
Line Regulation
300
I
V
LDOOUT = 1mA,
LDOIN = (VLDOOUT + 0.5V) to 6.5V (8)
LDOOUT = 1mA to 150mA,
LDOIN = VLDOOUT + 0.5V (8)
0.005
0.001
%/V
I
V
Load Regulation
%/mA
VLDOIN > VLDOOUT +0.5V,
CLDOOUT = 2.2μF,
VLDOIN(AC) = 100mV, f = 1kHz
70
30
dB
dB
PSRR
V
C
V
LDOIN > VLDOOUT + 0.5V,
LDOOUT = 2.2μF,
LDOIN(AC) = 100mV, f = 1MHz
LDOEN Input High Voltage
LDOEN Input Low Voltage
LDOEN Input Bias Current
Thermal Protection
1.5
V
V
0.4
VLDOEN = 0V, 5V
0.01
155
30
1
μA
°C
°C
Thermal Protection Hysteresis
Control Interface
BSTEN/SX Input High Voltage
BSTEN/SX Input Low Voltage
BSTEN/SX Input Bias Current
VBSTEN_H
VBSTEN_L
IBSTEN
1.4
V
V
0.4
1
µA
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
6
MP5414—PMU FOR 3D GLASSES
ELECTRICAL CHARACTERISTICS (continued)
VBSTIN = 2.4V, VBSTOUT=10V, IBSTOUT=2mA, VCHGIN = VLDOIN = 5V, TA = 25°C, unless otherwise noted.
Parameters
Symbol Condition
Min
Typ Max Units
SPDT Switch
Switch On-Resistance
RSPDT_ON VBSTOUT=10V, IA, IB, IC, ID=2mA
25
50
10
Ω
Ω
Switch On-Resistance Match
Between Channels
∆RSPDT_ON VBSTOUT=10V, IA, IB, IC, ID=2mA
Turn-on Time
Turn-off Time
Protection
TON
RL= 300Ω, CL= 35pF
RL= 300Ω, CL= 35pF
80
ns
ns
TOFF
170
Output Disconnect Switch On-
Resistance
RDISC_ON VBSTOUT=10V
0.74
150
0.8
Ω
Thermal Shutdown
°C
Notes:
5) ICHG is the target preprogrammed charge current (Die temperature below 110°C).
6) Guarantee by design
7) Dropout Voltage is defined as the input to output differential when the output voltage drops 1% below its normal value
8) VLDOIN = 2.7V for VLDOOUT = 1.25V to 2.2V.
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
7
MP5414—PMU FOR 3D GLASSES
TYPICAL PERFORMANCE CHARACTERISTICS
Step-Up Converter
VBSTIN = VBSTEN = 2.4V, VBSTOUT = 10V, IBSTOUT = 2mA, L1 = 10µH/150mΩ, unless otherwise noted.
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
8
MP5414—PMU FOR 3D GLASSES
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Charger
VCHGIN = 5V, C3 = C5 = 1µF, TA = 25°C, unless otherwise noted.
Battery Charge Curve
Charge Current vs.
Battery Votlage
Battery Voltage vs.
Input Voltage
4.9
4.2
3.5
2.8
2.1
1.4
0.7
0.0
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
4.30
4.26
4.22
4.18
4.14
4.10
0.36
0.30
0.24
0.18
0.12
0.06
0.00
V
BATT
I
BATT
V
STATUS
0
0.9
2.7
3.6
4.5
4.5 5.0 5.5 6.0 6.5 7.0
8.0
7.5
1.8
0
20
40
60
80
100
Charge Current vs.
Battery Voltage
Charge Current vs.
Charge Current vs.
Input Voltage
R
Resistance
PGM
0.36
0.30
0.24
0.18
0.12
0.06
0.00
8
7
6
5
4
3
2
1
0
350
300
250
200
150
100
50
0
2.9 3.1 3.3 3.5
3.9 4.1
3.7
0
50 100 150 200 250 300 350
400
4.5
6.0
7.5
9.0
Charge Current vs.
Temperature
Reverse Current vs.
Battery Votlage
Forward Leakage Current
160
156
152
148
144
140
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.8
0.75
0.7
0.65
0.6
0.55
0.5
0.45
0.4
-50
-25
0
25
50
75
2.5 2.8
3.7
4
4.3
3.1 3.4
7.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
9
MP5414—PMU FOR 3D GLASSES
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Charger
VCHGIN = 5V, C3 = C5 = 1µF, TA = 25°C, unless otherwise noted.
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
10
MP5414—PMU FOR 3D GLASSES
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
LDO
VLDOIN = 4.5V, VLDOOUT = 2.85V, C4 = 1μF, CBYP = 0.1μF, C6 = 2.2μF, TA = 25°C, unless otherwise
noted.
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
11
MP5414—PMU FOR 3D GLASSES
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
SPDT Switch
BSTIN = VBSTEN = 2.4V, VBSTOUT = 10V, IBSTOUT = 2mA, L1 = 10µH/150mΩ, unless otherwise noted.
V
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
12
MP5414—PMU FOR 3D GLASSES
PIN FUNCTIONS
Pin #
Name
Pin Function
C-Channel SPDT Switch Control Input. If the chip is enabled, a logic low input switches C to
GND and a logic high input switches C to BSTOUT. Do not leave this pin floating.
1
S2
Step-Up Converter Regulator Feedback. Connect to the tap of an external resistor divider
from the output to BSTFB to set the boost converter output voltage. Float this pin to achieve
fixed 10V output.
2
3
BSTFB
Step-Up Converter Constant Peak Current Set. Connect to an external resistor to BSTGND
to set the boost converter peak current.
BSTISET
4
5
BSTGND Step-Up Converter and SPDT Ground.
BATT
Charger Output.
Constant-Charge–Current Programmer. Connect to an external resistor to ground to
6
IPGM
program the charging current in constant-current mode. Do not connect a capacitor to this
pin.
7, 9
8
CHGGND Charger Ground.
CHGIN
CHGZ
Charger Input Supply. CHGIN receives the AC adapter.
10
Open-Drain Charger Status Indicator.
Low Dropout Enabled. Drive LDOEN high to turn on the low dropout, drive LDOEN low to
turn it off. For automatic startup, connect LDOEN to LDOIN.
11
LDOEN
Low Dropout Power Source Input. LDOIN supplies the internal power to the low dropout and
is the source of the pass transistor. Bypass LDOIN to LDOGND with a 1μF or greater
capacitor.
12
13
LDOIN
LDOGND Low Dropout Ground.
Low Dropout Regulator Output. LDOOUT is the output of the linear regulator. Bypass
LDOOUT to LDOGND with a 1μF or greater capacitor.
14, 15 LDOOUT
Low Dropout Feedback Input. Connect a resistor divider from LDOOUT to LDOFB to set the
output voltage.
16
17
LDOFB
Step-Up Converter Output Switch Node. BSTSW is the drain node of the internal low-side N-
BSTSW Channel MOSFET. Connect the inductor from BSTL to BSTSW to complete the step-up
converter.
18
19
BSTOUT Step-Up Converter Output.
Step-Up Converter and SPDT Input Supply. BSTIN pin powers the internal circuitry and is
BSTIN
the drain of the internal disconnecting N-channel MOSFET. Bypass locally.
Step-Up Converter Inductor Output. BSTL is the source/body of the internal N-channel
MOSFET, M3. Connect the inductor from this pin to BSTSW.
20
21
22
23
BSTL
Step-Up Converter and SPDT On/Off Control Input. A logic high input turns the chip on.. Do
not leave this pin floating.
BSTEN
B-Channel SPDT Switch Control Input. If the chip is enabled, a logic low input switches B to
GND and a logic high input switches B to BSTOUT. Do not leave this pin floating.
S1
A-Channel SPDT Switch Control Input. If the chip is enabled, a logic low input switches A to
GND and a logic high input switches A to BSTOUT. Do not leave this pin floating.
S0
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
13
MP5414—PMU FOR 3D GLASSES
PIN FUNCTIONS (continued)
Pin #
24
Name
Pin Function
A
B
C
D
A-Channel SPDT Switch Output.
B-Channel SPDT Switch Output.
C-Channel SPDT Switch Output.
D-Channel SPDT Switch Output.
25
26
27
D-Channel SPDT Switch Control Input. If the chip is enabled, a logic low input switches D to
GND and a logic high input switches D to BSTOUT. Do not leave this pin floating.
28
S3
Exposed
Pad
Connect exposed pad to ground plane in PCB for proper thermal performance.
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
14
MP5414—PMU FOR 3D GLASSES
FUNCTIONAL BLOCK DIAGRAM
L1
C2
BSTL
BSTSW
R1
R2
M2
M3
Driver
Driver
BSTOUT
BSTGND
Step-up
Converter
Control
Logic
BSTIN
BSTOUT
C1
Regulator
M1
Step-up Converter
Internal Power Supply
-
+
Current
Sensing AMP
BSTEN
S0
Step-up & SPDT
Enable Control
Peak Current
Control
BSTISET
BSTFB
-
S1
S2
Control
Signal
EA
+
1.23V
S3
SPDT Control
BSTOUT
A
B
C
D
L+
L-
R+
R-
CHGIN
BATT
VIN
R
C3
C5
Battery
LDOIN
-
+
C4
CHGZ
Battery
Charger
Control
Bandgap
Reference
CHGGND
LDOOUT
LDOFB
VLDOOUT
C6
R3
R4
RPGM
CBYP
IPGM
LDOGND
LDOEN
Figure 1—Functional Block Diagram
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
15
MP5414—PMU FOR 3D GLASSES
OPERATION
The MP5414 is a high-efficiency fully-integrated
PMU with a current-mode step-up converter, four
single-pole/double-throw (SPDT) switches, low
dropout (LDO), and a battery charger designed
for low-power battery-operated bias-supply
applications.
converter limits this inrush current by increasing
the current limit in three steps, rising from 0A to
ILIM/4 in 256 switching cycles, then ILIM/4 to ILIM/2
for the next 256 cycles, before rising to the full
current limit. The soft-start time varies greatly
with load current; output voltage, and input
voltage.
Step-Up Converter
Variable Frequency
Constant-Peak–Current Operation
Output Disconnection
The step-up converter integrates a disconnect
switch between the BSTIN and the BSTL pins.
The switch is composed of an NMOS and a
PMOS in parallel. The step-up converter can
disconnect all loads from input DC power supply
when the BSTEN pin is connected to ground.
When the power MOSFET M1 is turned on, the
inductor current increases until it hits its current
limit. The power MOSFET then turns off for a set
minimum-off time. If the feedback pin is still lower
than the 1.23V internal reference at the end of
this minimum off time, the power MOSFET will
turn on again. Otherwise the step-up converter
waits until the voltage drops below the threshold
before turning on the MOSFET again. This
process allows for optimal use of the inductor
while minimizing the output ripple, reducing the
size of the output capacitor, and maintaining low
operating current.
Under Voltage Lockout
An under-voltage lockout (UVLO) function
prevents device startup for values of VBATT < 1.5V.
If VBSTIN falls below 1.5V during device operation
and battery discharge, the device automatically
enters the shutdown mode.
Step-Up Converter Start-Up
Integrated Schottky Diode
The converter undergoes the following steps
after first applying the input signal and followed
by the enable signal:
A high switching frequency requires high-speed
rectification for optimum efficiency. The step-up
converter integrates a low-voltage–drop schottky
diode to reduce the number of external parts to
save critical board space.
1. PMOS of the disconnect switch turns on,
2. Internal soft-start boosts step-up converter,
causing VBSTOUT to rise,
Four SPDT Switches
3. VBSTOUT drives the NMOS of the disconnect
switch when VBSTOUT reaches threshold.
The MP5414 includes four SPDT analog
switches, where pins S0 through S3 control the
switches, respectively. While the chip is enabled,
a logic-low input switches the corresponding
channel output to BSTGND. Conversely, a logic-
high input switches the channel to BSTOUT.
Table 1 shows the control logic.
Because the on-resistance of the NMOS is
smaller than that of PMOS, the NMOS shorts the
PMOS under normal operation to reduce
conduction loss.
The MP5414 offers both soft-start and inrush
current limiting during start-up and under normal
operation.
Soft-Start
The step-up converter implements a soft-start by
charging an internal capacitor with a very weak
current source. The voltage on this capacitor, in
turn, slowly ramps the peak inductor current limit
from zero to the setting value. The step-up
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
16
MP5414—PMU FOR 3D GLASSES
Table 1—Switching Selection Control Logic
Control Input Switch Output
BSTEN
S0
X
L
S1
X
L
S2
X
L
S3
X
L
A
B
C
D
L
Open
Open
Open
Open
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
BSTGND BSTGND BSTGND BSTGND
BSTOUT BSTGND BSTGND BSTGND
BSTGND BSTOUT BSTGND BSTGND
BSTOUT BSTOUT BSTGND BSTGND
BSTGND BSTGND BSTOUT BSTGND
BSTOUT BSTGND BSTOUT BSTGND
BSTGND BSTOUT BSTOUT BSTGND
BSTOUT BSTOUT BSTOUT BSTGND
BSTGND BSTGND BSTGND BSTOUT
BSTOUT BSTGND BSTGND BSTOUT
BSTGND BSTOUT BSTGND BSTOUT
BSTOUT BSTOUT BSTGND BSTOUT
BSTGND BSTGND BSTOUT BSTOUT
BSTOUT BSTGND BSTOUT BSTOUT
BSTGND BSTOUT BSTOUT BSTOUT
BSTOUT BSTOUT BSTOUT BSTOUT
H
L
L
L
L
H
H
L
L
L
H
L
L
L
H
H
H
H
L
L
H
L
L
L
H
H
L
L
H
L
L
H
H
H
H
H
H
H
H
H
L
L
L
H
H
L
L
H
L
L
H
H
H
H
H
L
L
H
H
H
H: High Level
L: Low Level
X: Irrelevant
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
17
MP5414—PMU FOR 3D GLASSES
Charger
programmed current value, ICHG. Once the battery
voltage reaches 4.2V, the charger will operate in
the Constant Voltage (CV) mode until the battery
is fully charged.
The charger is enabled when the input supply
voltage reaches 3.5V, the UVLO threshold, or the
battery voltage—whichever voltage is highest. An
internal 500kΩ pull-down resistor connects the
CHGIN and CHGGND pins. The charger
automatically switches between CC/CV charging
algorithms depending on the battery status.
Figure 2 shows a typical charging sequence.
Charge Current vs
1/R
Resistance
PGM
400
350
300
250
200
150
100
50
V
I
BATT
BATT
Soft-Start
Time
V
BATT
4.2V
I
CHG
Thermal
Regulation
90% of I
CHG
CHG
2.6V
I
BATT
0
0
0.2
0.4
0.6
0.8
1.0
10% of I
Charge
Start
Charge
End
Trickle
Charging
CC
Mode
CV
Mode
Figure 3—Charge Current vs. 1/RPGM
Resistance
Figure 2—Charger Typical Charging
Procedure
Charge Status (CHGZ)
The open-drain CHGZ pin monitors charge status
by connecting to VBATT through an LED, a resistor,
or both. The CHGZ pin signals the end-of-
charge—or battery full—when its voltage goes
from LOW to HIGH (i.e. the LED turns off), which
occurs when ICHG decreases to 10% of the
programmed value.
Programming of Charge Current and Battery
Full Current
Table 2—RPGM and ICHG Relationship
RPGM (kΩ)
7.210
5.555
4.010
3.742
2.497
1.873
1.492
1.249
1.080
ICHG (mA)
54.67
70.99
Thermal Protection
98.70
The charger automatically limits the die
temperature to 130°C by reducing the current to
prevent overheating. The current remains
continuous throughout.
105.90
159.80
214.30
269.90
323.00
371.00
LDO
The MP5414 has an integrated low-current, low-
noise, high-PSRR, low-dropout linear regulator. It
is suitable for use in devices that require very low
noise power supplies and high-PSRR such as
PLL VCO supplies for mobile handsets and
802.11 PC Cards, as well as audio codecs and
microphones. The LDO uses a PMOS pass
element and features internal thermal shutdown.
An optional feed-forward capacitor CBYP between
LDOFB and LDOOUT pins for improves transient
response.
A resistor (RPGM) connecting the IPGM pin to
ground programs the charge current, ICHG. Table
2 and Figure 3 show the relationship between the
charge current and the value of the programming
resistor.
When the battery voltage falls below the trickle-
charge threshold (2.6V), the charge current is
limited to 10% of the programmed value. After
the battery voltage reaches 2.6V, the charger
switches to constant-current (CC) mode using a
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
18
MP5414—PMU FOR 3D GLASSES
APPLICATION INFORMATION
Components referenced below apply to
Typical Application Circuit on page 2.
For example, if R1=178kΩ and R2 = 24.9kΩ,
then VBSTOUT = 10V.
Setting the Step-Up Converter BSTSW
Current Limit
Selecting the Step-Up Converter Inductor
Select an inductor with a DC current rating of at
least 40% higher than the maximum input current.
For best efficiency, select an inductor with the
lowest-possible DC resistance.
The resistor on the BSTISET pin sets the
BSTSW current limit. Figure 4 illustrates the
relationship of the BSTSW current limit vs. the
BSTISET resistor. In constant-peak-current mode,
the inductor current increases until the current
limit is reached after the power MOSFET turns
on. Since the response delay, the actual BSTSW
peak current value exceeds the setting current
limit a little. Under same condition, a lower
current limit allows lower BSTSW current and
higher switching frequency, while a higher
current limit allows higher BSTSW current and
lower switching frequency.
Selecting the Step-Up Converter Input
Capacitor
The input capacitor, C1, reduces both the surge
current drawn from the input supply and the
switching noise from the device. Select a
capacitor with a switching frequency impedance
less than the input source impedance to prevent
high-frequency switching current from passing
through the input: for example, ceramic
capacitors with X5R or X7R dielectrics with low
ESR and small temperature coefficients. A 4.7μF
or 10μF capacitor will suffice for most
applications.
R
vs. Current Limit
BSTISET
900
800
700
600
500
400
300
200
100
0
Selecting the Step-Up Converter Output
Capacitor
The output capacitor, C2, limits the output
voltage and improves feedback loop stability.
Select an output capacitor with a low switching
frequency impedance, such as ceramic
capacitors with X7R dielectrics with low ESR
characteristics. A ceramic capacitor with a value
of less than 10μF will suffice for most
applications.
0
200 400 600 800 1000
Figure 4—BSTISET Resistance vs. BSTSW
Current Limit
Flow Chart of Charger Operation
The power-on reset (POR) feature can ensure
that the device initiates in a known state. The
flow chart in Figure 5 describes the conditions
that lead to charger operation modes, such as
constant voltage charge (CVC) and constant-
current charge (CCC).
Setting the BSTOUT Output Voltage
MP5414’s step-up converter features an internal
resistor divider that allows the device to output a
fixed 10V when the BSTFB is left floating.
Connecting the BSTFB pin to the tap of an
external resistor divider between BSTOUT to
ground otherwise sets the boost converter output
voltage, where:
R1+ R2
VBSTOUT = VBSTFB
Where VBSTFB = 1.23V.
×
R2
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
19
MP5414—PMU FOR 3D GLASSES
Figure 5—Flow Chart of Charger Operation
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
20
MP5414—PMU FOR 3D GLASSES
Setting the LDO Output Voltage
Selecting the LDO Input Capacitor
The LDO output voltage can be also adjusted by
using an external resistor divider (R3 and R4 in
the Functional Block Diagram). However, the
value of R3 and R4 in series should not exceed
100kΩ to minimize the impact on the internal
resistor divider. To accurately set the output
voltage, use 10kΩ (±1%) for the low-side resistor
(R4), and determine the value of the high-side
resistor R3 using the following equation:
For proper operation, place a ceramic capacitor
(C4) between 1µF and 10µF of dielectric type
X5R or X7R between the LDOIN pin and ground.
Larger values in this range will help improve line
transient response at the cost of increased size.
Selecting the LDO Output Capacitor
For stable operation, use a ceramic capacitor of
type X5R or X7R between 1µF and 10µF for the
LDOOUT capacitor, C6. Larger values in this
range will help improve load transient response
and reduce noise at the cost of increased size.
Other dielectric types can be used, but their
temperature-sensitivity can unduly influence their
capacitances.
⎛
⎜
⎝
⎞
⎟
⎠
VLDOOUT − VLDOFB
R3 = R4×
VLDOFB
Where VLDOFB is the OUT feedback threshold
voltage equal to 1.222V.
For example, for a 2.5V output
To improve load transient response, add a small
ceramic (X5R, X7R or Y5V dielectric) 100nF
feed-forward capacitor in parallel with R3. The
feed-forward capacitor is not required for stable
operation.
2.5V −1.222V
R3 =
=10.41kΩ
1.222V
⎛
⎞
⎜
⎝
⎟
⎠
10kΩ
You can select a standard 10.5kꢀ (±1%) resistor
for R3.
Layout Considerations
Proper layout of the high frequency switching
path is critical to limit noise issues and
electromagnetic interference. The circuit loop
from BSTOUT pin, output capacitor to BSTGND
pin is flowing with high frequency pulse current. It
must be as short as possible. The BSTIN pin is
the power supply input for the internal MOSFET
switch gate driver and the internal control
circuitry and requires decoupling. For the LDO,
the input and output need bypass ceramic
capacitors close to the LDOIN pin and LDOOUT
pin respectively. Ensure all feedback connections
are short and direct. Place the feedback resistors
and compensation components as close to the
chip as possible. Connect LDOIN, LDOOUT and
especially LDOGND respectively to a large
copper area to cool the chip to improve thermal
performance and long-term reliability. See the
MP5414 demo board layout for reference.
The following table lists the selected standard R3
values for correlated with their output voltages:
Table 3—Adjustable LDO Output Voltage
R3 Values
R4 (Ω)
VLDOOUT (V)
R3 (Ω)
232
1.25
1.5
1.8
2
2.26k
4.75k
6.34k
10.5k
13k
2.5
2.8
3
10k
14.7k
16.9k
22.6k
30.9k
3.3
4
5
MP5414 Rev.1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
21
MP5414—PMU FOR 3D GLASSES
PACKAGE INFORMATION
QFN28 (4x5mm)
2.50
2.80
3.90
4.10
23
28
PIN 1 ID
PIN 1 ID
MARKING
SEE DETAIL A
22
1
0.50
BSC
PIN 1 ID
INDEX AREA
4.90
5.10
0.18
0.30
3.50
3.80
8
15
14
9
0.35
0.45
TOP VIEW
BOTTOM VIEW
PIN 1 ID OPTION A
0.30x45º TYP.
PIN 1 ID OPTION B
R0.25 TYP.
0.80
1.00
0.20 REF
0.00
0.05
DETAIL A
SIDE VIEW
3.90
2.70
NOTE:
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH.
3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETER MAX.
4) DRAWING CONFORMS TO JEDEC MO-220, VARIATION VGHD-3.
5) DRAWING IS NOT TO SCALE.
0.70
0.25
3.70 4.90
0.50
RECOMMENDED LAND PATTERN
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP5414 Rev. 1.12
12/13/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
22
相关型号：
MP5420DM-LF-Z
Operational Amplifier, 4 Func, 20000uV Offset-Max, PDSO14, ROHS COMPLIANT, MO153AB-1, TSSOP-14
MPS
©2020 ICPDF网 联系我们和版权申明