MP3352DQ [MPS]
Interface Circuit, 3 X 3 MM, MO-220VEED-4, QFN-16;
| 型号： | MP3352DQ |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | Interface Circuit, 3 X 3 MM, MO-220VEED-4, QFN-16 接口集成电路 |
| 文件： | 总9页 (文件大小：434K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP3352
60V, 2.5A Integrated Photo Flash Charger
with IGBT Driver and Quench
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP3352 is a fast, highly efficient, precision
high-voltage photo-flash charger with integrated
IGBT driver for xenon flash applications. The
programmable peak current is up to 2.5A to
ensure fast charging time. A 200mΩ internal
power switch minimizes the conduction loss. In
addition, a 60V maximum voltage lowers the
transformer turns ratio and improves the
switching loss associated with the primary
leakage inductance. External feedback provides
3% charge accuracy.
•
•
•
•
•
•
Integrated 60V, 200mΩ Power Switch
Programmable Peak Current Up to 2.5A
3% Charge Accuracy
<1uA Shutdown Current
Integrated IGBT Driver
Integrated Quench Feature
APPLICATIONS
•
•
•
•
Digital Still Cameras
Optical Film Cameras
Mobile Phones With Camera
PDAs With Camera
The MP3352 is available in a 16-pin 3mm x
3mm QFN package.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
T1A
VIN
D1
+
TP8
SW
SW
VIN
T2
CHAG
CHARGE
FB
MP3352
RDYB
RDYB
QREF
ISET
R9
33.2k
D2
IGBTOUT
QREF
600V/1A
IGBTIN
QSNS
GND
QSNS
FGR15N40A
PGND
PGND
R13
10k
NC NC
AGND
IGBTIN
MP3352 Rev. 0.9
11/12/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
1
MP3352 – 60V, 2.5A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER AND QUENCH
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
VIN to GND........................................-0.3V to 6V
CHARGE, ISET, IGBTIN, RDYB, QREF, QSNS
to GND..............................................-0.3V to 6V
FB to GND........................................-0.3V to 6V
SW to GND.....................................-0.3V to 60V
Maximum Operating Frequency .............400kHz
Operating Temperature Ranges:-40°C to +85°C
Storage Temperature ...............-55°C to +150°C
Junction Temperature.............................+150°C
Lead Temperature (Solder) ....................+260°C
16
15
14
13
1
2
3
4
12
11
10
9
Thermal Resistance (2)
θJA
θJC
5
6
7
8
QFN16 (3mmx3mm)...............50...... 12... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) Measured on approximately 1” square of 1 oz copper.
Part Number*
Package
Temperature
MP3352DQ
QFN16-3
–40°C to +85°C
For Tape & Reel, add suffix –Z (e.g. MP3352DQ–Z)
For RoHS compliant packaging, add suffix –LF (e.g.
MP3352DQ–LF–Z)
*
ELECTRICAL CHARACTERISTICS
(VIN=V (CHARGE)=3.3V, TA = +25°C, unless otherwise noted.)
Parameter
Conditions
Min
Typ
Max
Unit
Photoflash Capacitor Charger
VIN Voltage Range
VIN UVLO
3
2.7
6
2.9
V
V
Rising edge, hysteresis = 200mV
V(CHARGE)=High, V(SW) = 0,
free run by TONMAX
2.8
1
VIN Quiescent Current
2
mA
µA
VIN Quiescent Current
Charge Complete,
50
V(CHARGE)=High, V(FB) = 1.3V
Shutdown Current from VIN
VSW Leakage Current
SW ON resistance between
SW and GND
V(CHARGE)=Low
VIN=3.3V,VSW=60V, in Shutdown
Switch turn-on
1
2
µA
µA
0.2
Ω
Charge Input High Voltage
Charge Input Low Voltage
2.4
V
V
0.6
Pull-down
CHARGE pin
IPEAK1
resistance
of
V(CHARGE)=3.3V
100K
Ω
RSET=33.2kΩ
RSET=100kΩ
1.36
0.4
1.51
0.5
1.66
0.6
A
A
IPEAK2
Charge completion detect
voltage at FB
1.176
1.20
1.224
V
FB input bias current I(FB)
DCM Comparator threshold
-0.2
15
0.2
35
µA
mV
With 1.2KΩ (1%) connected to FB
25
MP3352 Rev. 0.9
11/12/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
2
MP3352 – 60V, 2.5A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER AND QUENCH
ELECTRICAL CHARACTERISTICS (continued)
(VIN=V (CHARGE)=3.3V, TA = +25°C, unless otherwise noted.)
Parameter
Conditions
V(RDYB)=3.3V
ISINK= 2mA
Maximum TON time
Rising edge, hysteresis = 15oC
QREF=0.2V to 1.2V
QREF=0.2V to 1.2V
QREF=0.2V to 1.2V
QREF=0.2V to 1.2V
Min
Typ
Max
1
Unit
µA
V
RDYB Leakage Current
RDYB Output Low Voltage
MAX TON
Thermal Shutdown
QREF input current
QSNS-QREF offset voltage
QSNS input current
QSNS to IGBT Delay
IGBT Driver
0.2
75
150
45
105
µs
oC
-0.1
-50
-0.1
0.1
50
0.1
µA
mV
µA
µs
2
IGBTOUT pull-up ON
resistance
IGBTOUT pull-down ON
resistance
5
5
Ω
Ω
IGBTIN Input High Voltage
IGBTIN Input Low Voltage
Propagation delay
2.4
V
V
ns
0.6
IGBTIN rising/falling edge to
IGBTOUT rising/falling edge,
45
CGATE=6500pF
IGBTOUT rise time
IGBTOUT fall time
Pull down resistance of
IGBTIN
CGATE=6500pF,20% to 80%
CGATE=6500pF,20% to 80%
60
70
ns
ns
100K
Ω
PIN FUNCTIONS
Pin #
Name
ISET
GND
QREF
QSNS
Function
1
2
3
4
5
6
Peak Current Set Input. The peak current is 5X104 the current flow out of this pin.
Analog Ground. Tie it directly to local ground plane.
Quench reference input.
Quench sense input from light sensor.
IGBTOUT Output Drive for IGBT Gate. Connect this pin to the gate of the IGBT.
VIN
Input Supply Pin. Connect it to system supply voltage. Bypass VIN to GND
with a 2x10µF or greater ceramic capacitor.
7, 8
9
PGND
Power Ground. Ground connection for the power switch.
CHARGE Charge Enable Pin. A low-to-high transition on this pin puts the part into power
delivery mode. Once the target voltage is reached, the part will stop charging
the output. Toggle this pin will start charging again. Bring this pin low will
terminate the power delivery and put the part in shutdown.
10, 11
12, 13
14
N/C
SW
IGBTIN
RDYB
No Connect
Switch Pin. This is the drain of the internal power switch.
Logic Input Pin for IGBT Drive.
Open-Drain Power-Ready Output. RDYB goes low when the output voltage is
reached.
15
16
FB
Feedback Pin. Trip voltage is 1.2V.
MP3352 Rev. 0.9
11/12/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
3
MP3352 – 60V, 2.5A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER AND QUENCH
TYPICAL PERFORMANCE CHARACTERISTICS
TA = +25°C, unless otherwise noted.
Switching Waveform
Switching Waveform
VCC=VIN=3.3V,VOUT=300V,ISET=2.5A
VCC=VIN=5V,VOUT=300V,ISET=2.5A
VSW
VSW
20V/div.
20V/div.
V
OUT
V
OUT
50V/div.
50V/div.
INDUCTOR
2A/div.
I
INDUCTOR
I
2A/div.
Charging Waveform
Charging Waveform
COUT=47 F,VCC=VIN=3.3V,VOUT=300V,ISET=2.5A
COUT=100 F,VCC=VIN=3.3V,VOUT=300V,ISET=2.5A
V
CHARGE
VCHARGE
5V/div.
5V/div.
V
RDBY
V
RDBY
5V/div.
5V/div.
VOUT
VOUT
100V/div.
100V/div.
IIN
IIN
500mA/div.
500mA/div.
200ms/div
400ms/div
Charging Waveform
Charging Waveform
COUT=100 F,VCC=VIN=5V,VOUT=300V,ISET=2.5A
COUT=47 F,VCC=VIN=5V,VOUT=300V,ISET=2.5A
V
CHARGE
V
CHARGE
5V/div.
5V/div.
V
RDBY
V
RDBY
5V/div.
5V/div.
V
OUT
V
OUT
100V/div.
100V/div.
I
IN
I
IN
500mA/div.
500mA/div.
200ms/div
400ms/div
MP3352 Rev. 0.9
11/12/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
4
MP3352 – 60V, 2.5A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER AND QUENCH
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TA = +25°C, unless otherwise noted.
Charge time vs.
Input Voltage
Efiiciency at ISET=2.5A
85
80
75
70
65
60
55
50
45
40
2.5
2.0
1.5
1.0
V
V
IN=6V
IN=3V
0.5
0
VIN=4.5V
5.0
INPUT VOLTAGE (V)
200
2.0
3.0
4.0
6.0
7.0
50
100 150
250 300
OUTPUT VOLTAGE (V)
VOUT vs. VIN
Line Regulation (%)
1.00
0.50
300
298
296
0.00
294
292
290
-0.50
-1.00
5.0
5.0
INPUT VOLTAGE (V)
2.0
3.0
4.0
6.0
7.0
2.0
3.0
4.0
6.0
7.0
INPUT VOLTAGE (V)
Flash Current
V
OUT=300V
V
IGBTOUT
2V/div.
VIGBTIN
2V/div.
V
OUT
100V/div.
IFLASH
50A/div.
MP3352 Rev. 0.9
11/12/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
5
MP3352 – 60V, 2.5A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER AND QUENCH
TEST CIRCUITS
ISET
SW
V
IN
Driver
S
R
Q
Q
V
IN
50mΩ
PGND
AGND
1V
+
--
V
IN
R
ISET
80µ s
Delay
Bandgap,
Thermal
I-Lim
Shutdown &
POR
DCM
RDYD
+
--
10mV
FB
CHARGE
One
Shot
Q
S
R
Full
QSNS
QREF
FB
Q
+
--
1.2V
IGBTIN
IGBT
IN
100kΩ
IGBT
OUT
Figure 1—Functional Block Diagram
MP3352 Rev. 0.9
11/12/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
6
MP3352 – INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER
APPLICATION INFORMATION
Setting Peak Charge Current
MP3352’s peak charge current (ISET) can be set
by an external resistor, RSET from the ISET pin to
ground. The value of RSET can be calculated from:
MP3352 controlled flyback charger operates in
critical conduction mode with peak current set by
ISET pin. Output voltage is divided down through
R1, R2 from the positive terminal of the
transformer secondary and compares with 1.20V
at FB pin. The low to high transition of CHARGE
pin will enable the flyback converter to switch.
50
RSET (KΩ) =
ISET (A)
For example, for 2.5A peak charge current, RSET
is 20kꢀ.
Charger may enter DCM mode when charge is
close to full and actual OFF time is less than
Primary Inductance
The primary inductance is calculated based on
the minimum off time period:
minimum TOFF
.
Circuit will stop switching and
RDYB will be pulled low once the flash capacitor
is charged to 300V, a value set by R2, R5, and
VoutTmin,off
R8.
When the part is ready the internal
Lprimary
≥
dissipation is reduced to just the circuits for IGBT
driver. Toggle CHARGE pin will start charge
again. Bringing CHARGE pin low terminates the
power delivery and put the part in shutdown. A
maximum TON timer prevents pulling current from
starved power source. If the ON time exceeds
maximum TON, the switch is forced OFF
regardless of IPEAK detection. Integrated IGBT
driver uses VIN as its power supply.
NIpeak
VOUT: output voltage about 300V
MIN-OFF Minimum off time 300ns.
PEAK: primary peak current
T
I
Turns Ratio
The minimum turns ratio of the flyback
transformer is obtained as:
Vout
DCM Comparator
N ≥
Vds − V
DCM boundary is reached when V (FB) drops to
zero. The DCM comparator compares V (FB) and
a fixed offset voltage of 25mV to account for the
comparator delay.
in
VDS: FET drain-source voltage
VIN: Input voltage 3~5V
Charge Speed
The output capacitor charging speed is
determined by:
ILIM
Tcharge
∝
1
N
+
V
VOUT
IN
Table 1—Recommended Transformer Table
Part Number
TTRN-038S
T-19-060
Description
1:8, Lprimary = 6µH, for ILIM = 2.5
Amax
Size (L×W×H)
Vendor
6.4mm×7.7mm×4.0mm
TOKYO Coil
1:8, Lprimary = 6µH, for ILIM = 2.5
Amax
Wurth
Electronics
750310448
7mm×10mm×5mm
1:8, Lprimary = 6µH, for ILIM = 2A
only
LDT565630T-042
5.8mm×5.8mm×3mm
TDK
MP3352 Rev. 0.9
11/12/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
7
MP3352 – INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER
Quench Function
Setting Output Voltage
The output voltage is set by selecting the
resistive voltage divider ratio. If we use 1.2kꢀ the
low side resistor (R8) of the voltage divider, we
can determine the high side resistor (R2, R5) by
the equation:
MP3352 has build-in quench function to
accurately control exposure time and preserve
power, thus to extend battery life.
When output capacitor is fully charged and
IGBTIN (pin14) is set high, internal IGBT driver
drives the gate of IGBT high and fires the flash
strobe. Once the photo transistor gets the flash
light, it starts to charge C and the voltage of C
represents the total exposure. IGBT will be off
when the voltage on C exceeds the control
voltage on QREF (Pin3)
V
− V
1
out
R2 = R5 =
FB R8
2
VFB
R2=R5=150kꢀ
Typical
values
are
and
R8=1.2kꢀ.
Output Diode Selection
The reverse voltage of the output diode is
determined by:
12
13
6
SW
SW
VIN
VD = Vout + NV
in
16
9
CHARGE
FB
Control Voltage
MP3352
15
1
5
RDYB
QREF
ISET
VCC
3
IGBTOUT
Photo Transistor
4
2
14
8
IGBTIN
QSNS
GND
PGND
PGND
C
7
NC NC
10 11
TYPICAL APPLICATION CIRCUIT
VIN
T1
+
VCC
12
13
6
VIN
SW
SW
T2
9
16
CHAG
CHARGE
FB
MP3352
Xenon Flash
15
3
1
5
RDYB
QREF
ISET
RDYB
QREF
IGBTOUT
14
8
4
2
QSNS
Q1
Q2
IGBTIN
QSNS
GND
PGND
PGND
7
NC NC
10 11
IGBTIN
Figure 2—Application Circuit for 2 Cell Li-Ion Battery Photo Flash Charger
MP3352 Rev. 0.9
11/12/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
8
MP3352 – 60V,2.5A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER AND QUENCH
PACKAGE INFORMATION
QFN16-3(EXPOSED PAD)
2.90
3.10
1.50
1.80
0.30
0.50
13
16
PIN 1 ID
SEE DETAIL A
PIN 1 ID
MARKING
0.18
0.30
12
9
1
4
2.90
3.10
1.50
1.80
0.50
BSC
PIN 1 ID
INDEX AREA
5
8
TOP VIEW
BOTTOM VIEW
PIN 1 ID OPTION A
0.30x45”TYP.
PIN 1 ID OPTION B
R0.20 TYP.
0.80
1.00
0.20 REF
0.00
0.05
DETAIL A
SIDE VIEW
2.90
1.70
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 VEED-4.
5) DRAWING IS NOT TO SCALE.
0.70
0.25
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.
MP3352 Rev. 0.9
11/12/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
9
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