MP2607DL-LF [MPS]
Power Supply Support Circuit, Adjustable, 1 Channel, PDSO14, QFN-14;
| 型号： | MP2607DL-LF |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | Power Supply Support Circuit, Adjustable, 1 Channel, PDSO14, QFN-14 光电二极管 |
| 文件： | 总15页 (文件大小：332K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP2607
Li + LINEAR Charger
WithSystem Power Path Management
The Future of Analog IC Technology
DESCRIPTION
FEATURES
MP2607 is a highly-integrated single-cell Li-
Ion/Li-Polymer battery charger with system
power path management function. It takes input
from either AC adapter or USB port to supply
•
Fully Autonomous Charger for Single-Cell
Li-Ion/Polymer Batteries
Selectable Input Power Sources from AC
Adapter or USB Port
•
the
system
and
charge
the
battery
•
•
Built-in Current Limit for USB Port
Complete Power Path Management for
Simultaneously Powering the System and
Charging the Battery
0.75% Charging Voltage Accuracy
12V Maximum Voltage for the Input Source
Programmable Charging Current
Built-in Timer for Charge Termination
No External Blocking Diode Required
Tiny QFN14 (3mm x 4mm) Package
independently. The charger section features
trickle charge, high-accuracy constant current
(CC) and constant voltage (CV) regulation,
charge termination and charge status.
•
•
•
•
•
•
The system power path management function
ensures continuous supply to the system by
automatically selecting the input, the battery or
both to power the system. This section features
a low drop-out regulator from input to system,
and a 50mΩ switch from battery to system.
Power path management separates charging
current from system load, which allows proper
charge termination and keeps battery stay fully-
charged. It also allows instantaneous power up
of system with a deeply discharged battery.
APPLICATIONS
•
•
•
•
Smart Handheld Devices
Cell Phones, PDAs, MP3 Players
Digital Cameras, GPS
Handheld Test Equipment
MP2607 is available in 14pin 3mm*4mm QFN
package.
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
ORDERING INFORMATION
Part Number*
Package
Top Marking
Free Air Temperature (TA)
QFN14 (3mm x 4mm)
MP2607DL
2607
-40°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP2607DL –Z);
For RoHS compliant packaging, add suffix –LF; (e.g. MP2607DL –LF–Z)
PACKAGE REFERENCE
TOP VIEW
Thermal Resistance (4)
QFN14 (3mm x 4mm).............40....... 6.... °C/W
θJA
θJC
ABSOLUTE MAXIMUM RATINGS (1)
VIN ..................................................-0.3V to 13V
V
SYS – VBATT .........................................-5V to 5V
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.
All Other Pins................................-0.3V to 6.5 V
(2)
Continuous Power Dissipation (TA = +25°C)
............................................................. 3.1W
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature................. -65°C to 150°C
Recommended Operating Conditions (3)
Supply Voltage VIN ...... 4.51V to 5.9V (AC Input)
4.51V to 6.27V (USB Input)
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7 4 layers board.
Output Voltage VBATT.......................3.0V to 4.5V
Operating Junct. Temp (TJ)...... -40°C to +125°C
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
2
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
ELECTRICAL CHARACTERISTICS (5)
VIN = 5.5V, VBATT = 3.5V, VCEB = GND, TA = 25°C, unless otherwise noted.
Parameter
Symbol Condition
VIN
Min
Typ
Max
Units
IN Input Voltage
4.51
12
V
VIN_OV_AC MODE = 5V
VIN_OV_US MODE = GND
5.9
6.27
260
IN Input Over Voltage
Threshold
V
AC mode, MODE = 5V
IN Input Over Voltage
Hysteresis
mV
USB mode, MODE=GND
310
Input Undervoltage
Threshold
VIN_UV Input rising threshold
4.25
4.38
4.51
V
AC mode, MODE = 5V
520
150
Input Undervoltage
Threshold Hysteresis
mV
USB mode, MODE = GND
Input vs. Battery
Threshold
VIN_BAT Input rising vs. battery
120
70
mV
mV
V
Input vs. Battery
Threshold Hysteresis
BATT Undervoltage
Threshold
VUV_BAT BATT voltage rising
2.4
2.8
200
3.2
BATT Undervoltage
Threshold Hysteresis
mV
Power Path Management
AC Regulator Out Voltage VAC_REG VIN = 5.5V, MODE = 5V
4.65
1.4
4.85
2
5.05
2.6
V
A
AC Regulator Current
IAC_MAX VIN = 5V, MODE = 5V
Limit
USB input current limit
IUSB_MAX MODE = GND, VIN = 5V, VBATT=4V
410
1.5
450
490
mA
MODE > VMODE, AC adapter
VMODE
Input selection threshold
MODE < VMODE, USB port
0.3
V
ISYS+ICHG
current
<
adapter
limit,
4.85
4.2
ISYS=100mA
VIN = 5.5V
MODE = 5V
ISYS+ICHG
current
>
adapter
limit,
ISYS=400mA
ISYS+ICHG < USB port
current limit,
SYS=100mA
SYS Output Voltage
VSYS
V
4.93
VIN = 5V,
I
MODE=GND
ISYS > USB port current
limit, VBATT=3.5V
3.4
3.2
VIN = 3.5V, VBATT=3.2V (VBATT Rising
edge)
IN to SYS Switch On
Resistance
ISYS(400mA)+ICHG >I_Adapter, MODE =
5V
RON_SYS
300
450
mꢀ
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
3
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
ELECTRICAL CHARACTERISTICS (5) (continued)
VIN = 5.5V, VBATT = 3.5V, VCEB = GND, TA = 25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
Max
Units
= GND, ICHG = 0A, ISYS = 0A,
VBATT=4.5V , VIN = 5.5V, MODE = 5V
CEB
420
µA
= GND, ICHG = 0A, ISYS = 0A,
VBATT=4.5V, VIN = 5.5V, MODE = GND
CEB
400
120
1.4
Supply Current at Input
IIN
= 5V, ICHG = 0A, ISYS = 0A,
VBATT=4.5V, VIN = 5.5V
CEB
µA
= 5V, ICHG = 0A, ISYS = 0A,
VBATT=4.5V, VIN = 12V
CEB
mA
VIN =5.5V, VBATT=4.5V
125
25
= GND,
ISYS=0A
CEB
µA
Supply Current at BATT
Input
IBATT
VIN = 4V, VBATT=4.5V
35
30
20
= 5V, ISYS = 0A, VBATT=3.5V
CEB
BATT Input to SYS Switch
On Resistance
RON_BSW VIN =GND, VBATT=3.5V, ISYS=100mA
VBATT=3.5V, ISYS =600mA,
50
80
mꢀ
BATT Input to SYS Switch
On Voltage Drop
VIN =5V (Battery supplement mode),
VD_BSW
40
100
300
160
mV
= GND, MODE = GND
CEB
BATT to SYS Short
Protection Current
VBATT=3.5V, VSYS=GND,
(guaranteed by design)
=5V
CEB
CEB
IBATT_MAX
mA
µA
µA
BATT to SYS Switch
Leakage
1
1
V
BATT=2.3V, VIN=VSYS=GND,
SYS=5V, VIN=VBATT=GND,
=5V
SYS Reverse to BATT
Switch Leakage
V
=5V
CEB
Charger
T = +25°C, IBATT = 0
4.179
4.168
4.158
4.20 4.221
4.20 4.232
4.20 4.242
Battery Voltage Regulation
VBATT
V
T = 0°C to +50°C, IBATT = 0
T = –5°C to +75°C, IBATT = 0
RON_BATT VIN=4.3V, VBATT=4.165V, ICHG=1A
VIN = 5V, VBATT = 3.5V, MODE = 5V
IN to BATT Switch On
Resistance
200
400
mꢀ
mA
mA
A
880
210
1000 1120
R
CHG = 2.263kꢀ
Constant Current
Regulation for Charging
ICHG
VIN = 5V, VBATT = 3.5V, MODE = GND
RCHG = 7.6kꢀ
300
390
Programmable Charge
Current
ICHG
VIN = 5V, VBATT = 3.5V, MODE = 5V
1.5(5)
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
4
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
ELECTRICAL CHARACTERISTICS (5) (continued)
VIN = 5.5V, VBATT = 3.5V, VCEB = GND, TA = 25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
Max
Units
Charging current Thermal
Fold-back Threshold
105
120
135
°C
VSYS = 5V, VBATT = 3.5V
1.5kꢀ < RCHG < 7.6kꢀ
-12
12
Constant Current Variation
for Charging
ΔICHG
%ICHG
7.6kꢀ < RCHG < 22kꢀ
-30
5
30
12
Trickle Charge Current(7)
ITRKL
IEOC
VBATT = 2.0V, RCHG = 2.263kꢀ
8.5
10
15
%ICHG
%ICHG
mA
RCHG = 2.263kꢀ (1A ICHG
)
7
13
End of Charge (EOC)
current threshold(8)
RCHG = 22.6kꢀ (100mA Ichg)
9
25
RCHG*IC RCHG*IC RCHG*IC
HG/201 HG/180 HG/158
Voltage at ICHSET pin
VICHSET 1.5kꢀ < RCHG < 4.5kꢀ
V
6
0
4
Trickle Threshold Voltage
Trickle Voltage Hysteresis
VTH_TRKL VBATT Rising
2.7
2.8
190
2.9
V
mV
Auto Re-charge Fall
Threshold
VRECHG VBATT Falling
3.95
2
4.05
4.15
0.3
V
V
V
Threshold
CEB
CEB
CEB
threshold
1
Mꢀ
pin Pull-up Resistor
,
Sink
STAT1 STAT2
Current
Pin Voltage = 0.3V
8
mA
Battery Reverse Current to
IN pin
IN pin grounded, VBATT = 4.3V
CTMR=1µF, RCHG=2.263kꢀ (1A ICHG
TMR=1µF, RCHG=22.6kꢀ (100mA
1
µA
)
1.1
8.4
Hour
Hour
Timer for Charging
Timer Count
τTMR_F
C
ICHG
)
CTMR_F
CTMR_T
217
215
RCHG=2.263kꢀ (1A ICHG
)
-20
-40
20
40
%
%
Timer Accuracy
R
CHG=22.6kꢀ (100mA ICHG)
NTC pin Output Current
INTC
-100
0
100
nA
= GND
CEB
VTH_LT Ambient Temp = 0°C
VTH_HT Ambient Temp = 50°C
58
28
60
30
62
32
%VIN
%VIN
Temperature Fault
Threshold Voltage
Notes:
5) Min. VIN is determined by internal UVLO and relative to BATT voltage
6) High Charge current make MP2607 get into thermal fold-back and charge current will drop down.
7) ICHG is the target preprogrammed charge current (Die temperature below 110°C), i.e. typical value of ICHG
.
8) IEOC is the target preprogrammed battery full current threshold, i.e. typical value of IEOC
.
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
PIN FUNCTIONS
Pin #
1, 2
3
Name
I/O
I/O
I
Description
BATT
Connected to battery
MODE
ICHSET
Input select for AC adapter or USB port
Connected to an external resistor to set charging current ICHG
4
O
Program pin to set timer for the charger with an external capacitor; 470nF
equivalents to 1 hour if RCHG is 4.2kꢀ
5
6
TMR
CEB
I
I
Enable pin for MP2607.
high (>2V) disables IN (AC or USB) regulation path
CEB
and charger, the system is supplied only from battery
7
8
GND
NTC
Power Ground
O
O
Battery temperature sense pin, connected to the thermistor of battery pack
9
STAT2
Charging status indication pin: 1. charging; 2. end of charge; 3. charge suspend;
4. Fault
10
O
STAT1
IN
11, 12
13, 14
Power Input for AC adapter or USB port
Power System power supply.
SYS
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
6
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
TYPICAL PERFORMANCE CURVES
VIN=5.5V, CIN=4.7µF, CSYS=10µF, CBAT=4.7µF, TA=25°C, unless otherwise noted.
Battery Charge Curve
Charge Current vs.
Battery Voltage
I vs. 1/R
CHG CHG
800
700
600
500
400
300
200
100
0
700
600
500
400
300
200
100
0
1400
1200
1000
800
600
400
200
0
4.5
4
MODE=1, Rchg=3.6k
VBAT
3.5
3
MODE=0, Rchg=3.6k
MODE=1, Rchg=8.66k
2.5
2
1.5
1
ICHG
0.5
0
2
2.5
3
3.5
4
4.5
0
20
40
60
80
0
0.1 0.2 0.3 0.4 0.5 0.6
TIME (Min)
VBAT (V)
CC Charge Current vs.
Input Voltage
CC Charge Current vs.
Temperature
V
CV Regulation Voltage vs.
BAT
Temperature
700
600
500
400
300
200
100
0
1200
1000
800
600
400
200
0
4.3
4.2
4.1
4
Thermal Fold back
Rchg=2.21k
Mode=1
Rchg=3.6k
Mode=0
Rchg=8.66k
3.9
3.8
-50 -30 -10 10 30 50 70 90
4.5
4.8
5.1
5.4
5.7
6
-40 -20
0
20 40 60 80
Temperature (
C)
VIN (V)
Temperature (
C)
Power Path Management
Power Path Management
Power Path Management
MODE=1, 1.5A Source Current Limit,
W/ Battery
MODE=0, W/ Battery
MODE=0, W/ Battery
V
V
IN
SYS
2V/div.
2V/div.
V
BAT
V
2V/div.
BAT
1V/div.
V
BAT
2V/div.
I
IN
I
0.2A/div.
IN
I
IN
0.2A/div.
0.5A/div.
I
I
BAT
BAT
I
BAT
0.5A/div.
0.5A/div.
0.5A/div.
I
I
SYS
I
SYS
SYS
0.5A/div.
0.5A/div.
0.5A/div.
4s/div.
10s/div.
4s/div.
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
7
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
TYPICAL PERFORMANCE CURVES (continued)
VIN=5.5V, CIN=4.7µF, CSYS=10µF, CBAT=4.7µF, TA=25°C, unless otherwise noted.
Power On
MODE=1, RCHG=3.6k, W/O Battery
Power On
MODE=1, RCHG=3.6k, W/ Battery
Power On
MODE=0, RCHG=3.6k, W/ Battery
V
V
IN
2V/div
IN
2V/div
V
V
IN
2V/div
V
SYS
2V/div
SYS
2V/div
BAT
V
BAT
2V/div
V
2V/div
V
SYS
2V/div
V
BAT
2V/div
I
I
BAT
BAT
0.2A/div
0.2A/div
I
SYS
0.5A/div
200ms/div
200ms/div
200ms/div
Power Off
MODE=1, RCHG=3.6k, W/ Battery
Power Off
MODE=0, RCHG=3.6k, W/ Battery
Power Off
MODE=1, W/O Battery
V
V
IN
2V/div
V
IN
IN
2V/div
2V/div
V
SYS
2V/div
V
V
SYS
SYS
2V/div
2V/div
V
BAT
V
V
BAT
BAT
2V/div
2V/div
2V/div
I
I
SYS
BAT
I
BAT
1A/div
1A/div
0.2A/div
10ms/div
10ms/div
10ms/div
Enable Control On
MODE=1, W/O Battery
Enable Control On
MODE=1, RCHG=3.6k, W/ Battery
Enable Control On
MODE=0, RCHG=3.6k, W/ Battery
V
CEB
2V/div
V
CEB
2V/div
V
CEB
2V/div
V
SYS
V
SYS
2V/div
V
2V/div
2V/div
V
BAT
BAT
V
SYS
2V/div
2V/div
V
BAT
2V/div
I
I
BAT
SYS
I
BAT
0.2A/div
1A/div
1A/div
10ms/div
10ms/div
10ms/div
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
8
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
TYPICAL PERFORMANCE CURVES (continued)
VIN=5.5V, CIN=4.7µF, CSYS=10µF, CBAT=4.7µF, TA=25°C, unless otherwise noted.
Enable Control Off
MODE=1, W/O Battery
Enable Control Off
MODE=1, RCHG=3.6k, W/ Battery
Enable Control Off
MODE=0, RCHG=3.6k, W/ Battery
V
V
CEB
2V/div
SYS
V
CEB
CEB
2V/div
V
2V/div
2V/div
V
2V/div
V
SYS
SYS
2V/div
V
V
V
BAT
BAT
BAT
2V/div
2V/div
2V/div
I
BAT
0.2A/div
I
I
SYS
BAT
1A/div
1A/div
10ms/div
10ms/div
10ms/div
Input Selection
RCHG=3.6k, W/ Battery
Input OVP
VIN from 5V to 6V, MODE=1,
Input OVP Recovery
VIN from 6V to 5V, MODE=1,
R
CHG=3.6k, W/ Battery
RCHG=3.6k, W/ Battery
V
IN
5V/div
V
V
IN
V
IN
2V/div
1V/div
BAT
2V/div
SYS
1V/div
BAT
0.2A/div
SYS
1V/div
V
V
SYS
1V/div
BAT
1V/div
V
V
I
I
BAT
0.2A/div
V
MODE=0.65V
V
MODE
I
BAT
0.2A/div
0.2V/div
200ms/div
40ms/div
40ms/div
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
9
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
BLOCK DIAGRAM
IN
AC
Adaptor
or
USB
port
EN
MP1SEN
MP1
VIN REGULATOR
VIN UVLO
1. For AC: Vout = 5V
Coarse current
limit = 2A
EN
VBG
References
&Bias
SYS
2. For USB: Vout=VIN
Accurate current
limit set internally to
450mA typ.
MODE
SYSTEM
COMP
SYS<BAT
10mV
BATTERY
UVLO
VBAT_GOOD
ICH foldback for
USB mode
ICH foldback for
Current limited AC
MP2
4.3V
2.8V
EN
MNSW
BATTERY CHARGE
CONTROL
BATTERY SWITCH
CONTROL
TRICKLE_CHG
RE_CHG
BATT
&
2X CHARGE PUMP
Trickle Charge
CC/CV Regulation
Thermal Regulation
Programmable ICH
Dynamic ICH Adjustment
Auto-recharge
Constant V
D_BSW
4.05V
Constant R
ON_BSW
Current Limit
NSW_ON
Time-out temination
ICHSET
BATT
RCHSET
TMR
Time Out
Counter
EN
CTMR
EN
CHG
IN
R1
TEMP_OK
STAT1
STAT2
IN
TRICKLE_CHG
EN
Charger Status
Decoder
RT1
R2
R3
NTC
RTHM
RT2
EN
CEB
GND
Figure 1—Functional Block Diagram
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
10
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
OPERATION
The MP2607 is a highly-integrated single-cell
Li-ion or Li-polymer battery charger with system
power path management function. The full
function charger features trickle charge, high
accuracy constant current (CC) and constant
voltage (CV) regulation, charge termination,
auto recharge, thermal fold-back, built-in timer
and 4-status indicator output. The power path
function allows the input source to power the
system and charge the battery independently. If
there is conflict to meet both system load and
battery charging current, MP2607 will
automatically reduce charging current or even
use battery as supplement to satisfy the system
load. This allows optimal battery charging,
reduces charge/discharge cycle, and best
preserves the battery energy.
source current limit, either AC adapter or USB
port, MP2607 automatically reduces the
charging current to comply with the source
current limit and satisfy SYS load demand (Fig2
and Fig3). For USB mode, if SYS load current
further increases beyond the source current
limit, SYS voltage will drop to below BATT and
MP2607 will turn on the 50mΩ N-channel
switch between BATT and SYS to allow battery
to supplement the system load (Fig3). The
control of this switch has two phases in this
battery supplement mode: 1) constant VDS
where its voltage drop is regulated. This occurs
at low battery supplement current level; 2)
constant RDS where the switch is fully on. This
occurs at medium to high battery supplement
current level; Battery supplement mode ensures
the system load is always met and its operation
will not be disturbed.
Input Selection for Power Path and Charger
MP2607 identifies the input source (IN) based
on the logic level of MODE pin. MODE pulled
high indicates IN is connected with AC adapter,
low indicates IN connected with USB port. In
either case, the input source will supply both
system load and battery charging current. If IN
is not connected to a valid input source, the
battery (BATT) is selected to supply the system
(SYS). The built-in N-channel 50mΩ switch
between BATT and SYS minimizes the
conduction drop and extends the battery life.
The constant VDS control is enabled only when
IN is connected to a valid source, thus allow
automatic turn-off of the N-channel switch to
avoid overcharge when SYS pin voltage
recovers to rise above BATT pin voltage.
AC adaptor
Voltage
4.3V
The IN of MP2607 can accept voltage as high
as 13V, thus allows the use of low cost high
output ripple adapters.
AC adaptor
current Limit
AC adaptor
current
Charging
current
SYS load
current
MODE pin is default “high” with internal pull-up.
Power Path Management
If IN is connected with AC adapter, MP2607
regulates the SYS pin voltage at about 5V with
an internal low drop-out regulator. If IN is
connected with USB port, SYS is connected to
IN through an internal current limited switch. In
both cases, the battery charging is done
through a P-channel FET between IN and
BATT, so the input source supplies both load
current to SYS and charging current to BATT.
This P-channel FET on-resistance is designed
to be less than 0.3ohm to minimize the dropout
from IN to BATT. If the sum of SYS load current
and BATT charging current will exceed the
Figure 2—Power Path Management for AC
Adapter Mode
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
11
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
Regardless of the charger status, however, the
charger does not turn off as long as a valid
input power source is attached.
SYS voltage
BATT voltage
Charger Status
Charging
End of Charge
STAT1
Low
STAT2
Low
SYS load
current
USB port
current
Low
High
Low
Charging
current
Charge Suspended (due High
to Battery supplement
mode or NTC out of
range)
Battery
supplements load
Fault/Disable (due to High
High
time-out,
thermal
internal
shutdown),
Figure 3—Power Path Management for USB
Mode
>2V, or no VIN
EN
Power path management allows use of lower
current limited sources while still provides
continuous system supply and optimal battery
charging at the same time.
NTC Temperature Sensor
The NTC pin allows MP2607 to sense the
ambient temperature using the Negative
Thermal Coefficient (NTC) thermistor usually
available in the battery pack to ensure a safe
operating environment of the battery. A resistor
with appropriate value should be connected
from VIN to NTC and the NTC resistor parallel
connected a regular resistor is connected form
NTC pin to ground. The voltage on NTC pin is
determined by the resistor divider whose divide
ratio depends on the ambient temperature.
MP2607 internally sets a pre-determined upper
and lower bound of the divide ratio. If NTC pin
voltage falls out of this range which means the
temperature is outside the safe operating range,
MP2607 will stop charging and report it on
status pins. Charging will automatically resume
after the temperature falls back into the safe
range.
USB Mode Input Switch Current Limit
When IN is connected to an USB port, the
switch between IN and SYS has a built-in
current limit that is set by an internal resistor
with typical value of 450mA. Post-package
trimming keeps the variation within +-5%.
Charging Current Thermal Fold-back
MP2607 has internal monitoring circuit that will
reduce the charging current if the chip junction
temperature reaches 120°C. This prevents
overheat of the chip and avoids unnecessary
thermal shutdown.
Floating Charging Voltage
The floating voltage for the constant voltage
regulation phase is 4.2V. It has ±0.75%
accuracy over the ambient temperature range
of -10°C to +70°C.
Enable
Enable of MP2607 is controlled by pulling
CEB
Auto Recharge
MP2607 automatically recharge the battery if
BATT pin voltage falls below a predetermined
threshold VRECHG. This allows the battery to
always stay at full or near full condition,
increasing the battery life.
pin below 0.3V. Pulling
CEB
pin above 2V will
put MP2607 in sleep mode, which disables
power path management and battery charger.
In sleep mode, the N-channel switch between
BATT and SYS is fully on to maintain system
supply. Battery under-voltage and current limit
are kept alive to provide safeguard.
Status Indication output
and
are two open-drain NMOS
STAT1
STAT1
outputs which should be connected to pull-up
resistors to SYS output or desired supply rail.
Their output logic level combinations are used
to indicate 4 status of the charger:
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
12
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
Trickle Charge Current
APPLICATION INFORMATION
When the battery voltage is below the minimum
battery voltage VTH_TRKL (defined in the electrical
COMPONENT SELECTION
characteristics table), the charger operates in a
Battery Charging Current
trickle/preconditioning
charging current is typically 7.5% of the
programmed charge current ICHG
mode,
where
the
The charging current of MP2607 is
programmable using an external resistor RCHG
at ICHSET pin:
.
1.260V
ITRKL =150×
1.260V
R
CHG (Ω)
ICHG =1800×
R
CHG (Ω)
Timer for Charge Termination
MP2607 has a built-in timer to terminate the
charge if the timer times out, no matter whether
IEOC is reached or not. And once the battery is
charged full, the timer is reset. This timer is
programmable using an external capacitor CTMR
at TMR pin, to allow user adjust to different
battery capacity. The timer can be calculated as:
Where 1.260V is an internal reference voltage
for ICHSET programming. Typically RCHG is
chosen between 1.51kꢀ (1.50A ICHG) and 7.5kꢀ
(300mA ICHG).
However, due to current limit constraint at the
input source, either adapter or USB port input,
the charging current could be less than above
calculated value if system load demand is high.
MP2607 will always ensure the sum of system
load current and charging current complies with
source current limit, with system load has the
priority. Especially for USB mode, when system
load exceeds the source current limit, charging
is actually stopped and battery is pulled in to
supplement the system load.
2μA +1A/36000 CTMR
2μA +ICHG/36000 1μF
τTMR_F = 1.1hours×
×
The timer period is strictly inversely proportional
to the real charging current (either in power
path state or CV charge mode), the sink and
source current of CTMR is
.
2μA +Ichg/36000
So, the trickle charge timer can be calculated
When using USB port as input source, if the
charging current is set higher than USB port
current limit IUSB_MAX, then the real charging
current will not be higher than USB current limit
and could be reduced further if system draws
any load.
based on the τTMR_F
:
215
2μA + ICHG/36000
τTMR_T = τTMR_F
×
×
217 2μA +ITRKL /36000
Due to the power path management function,
the real charging current usually varies during
the whole charging process, thus MP2607
automatically takes into account this variation
and adjust the timer time out accordingly.
Basically the timer increases the same
proportion as the charging current decreases. If
the charging is stopped due to high system load,
the timer is temporarily suspended. In this way,
the actual energy delivered to the battery, which
is charging current multiplying the charging time,
remains constant.
End of Charge Threshold Current
The end of charge threshold current is set
internally to be at 10% of ICHG
:
1.260V
IEOC = 180×
RCHG (Ω)
Where 1.260V is an internal reference voltage
and RCHG is the programming resistor at
ICHSET pin.
When the charging current falls below IEOC in
CV charge mode, MP2607 will terminate charge,
and latch the status pin to indicate the end of
charge.
The time out operation will set the charger into
suspended state and be reported at the status
output pins. To clear the time out status, one
has to recycle the chip enable pin or IN supply.
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
13
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
Resistor Choose for NTC Sensor
NTC pin uses a resistor divider from input
source (IN) to sense the ambient temperature.
The two resistors RT1 and RT2 allow the high
temperature limit and low temperature limit to
be programmed independently. In another word,
MP2607 can fit most type of NTC resistor and
different
temperature
operation
range
requirement with the two extra resistors.
RT1 and RT2 values depend on the type of the
NTC resistor:
0.3×RNTCH ×RNTCL
0.12×RNTCL − 0.42×RNTCH
RT2
=
RT1 = 0.667× R / /RNTCL
(
)
T2
RNTCH is the value of the NTC resistor at high
temperature of the required temperature
operation range, and RNTCL is the value of the
NTC resistor at low temperature.
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
14
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
PACKAGE INFORMATION
QFN 14 (3mm x 4mm)
1.60
1.80
2.90
3.10
0.30
0.50
PIN 1 ID
SEE DETAIL A
PIN 1 ID
MARKING
1
14
0.18
0.30
3.20
3.40
3.90
4.10
PIN 1 ID
INDEX AREA
0.50
BSC
7
8
TOP VIEW
BOTTOM VIEW
PIN 1 ID OPTION A
0.30x45º TYP.
PIN 1 ID OPTION B
R0.20 TYP.
0.80
1.00
0.20 REF
SIDE VIEW
2.90
0.00
0.05
DETAIL A
NOTE:
1.70
0.70
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-229, VARIATION VEED-5.
5) DRAWING IS NOT TO SCALE.
0.25
3.30
0.50
RECOMMENDED LAND PATTERN
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
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.
MP2607 Rev. 1.02
6/19/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
15
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