MP3351DQ [MPS]
60V, 2A Integrated Photo Flash Charger With IGBT Driver;
| 型号： | MP3351DQ |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | 60V, 2A Integrated Photo Flash Charger With IGBT Driver 双极性晶体管 |
| 文件： | 总8页 (文件大小：535K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP3351
60V, 2A Integrated Photo Flash Charger
With IGBT Driver
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP3351 is a fast, highly efficient, precision
high voltage photo-flash charger with integrated
IGBT driver for xenon flash applications. The
programmable peak current from 300mA to 2A.
A 200mΩ internal power switch minimizes the
conduction loss. 60V maximum output voltage
lowers the transformer turns ratio and improves
switching loss associated with the primary
leakage inductance. External feedback provides
3% charge accuracy.
•
•
•
•
•
Integrated 60V, 200mΩ Power Switch
Operates from a Single or Duel-Cell Li+ Battery
2A peak current w/resistor program
3% Charge Accuracy
Integrated IGBT Driver
APPLICATIONS
•
•
•
•
Digital Still Cameras
Optical Film Cameras
Mobile Phones With Camera
PDAs With Camera
The MP3351 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
T1
VBATT
1.3V-9V
V
OUT
Single or Dual Cell Battery
+
-
3-6V
V
ISET
SW
IN
3, 6
1
12, 13
PGND
GND
7, 8
2, 4
RDYB
15
MP3351
IGBTIN
FB
14
16
9
IGBT
CHARGE
10, 11
5
N/C
IGBTOUT
MP3351 Rev. 0.91
9/2/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
1
MP3351 – 60V, 2A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
VIN to GND........................................-0.3V to 6V
CHARGE, ISET, IGBTIN, RDYB 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
QFN16 (3mm x 3mm).............50...... 12... °C/W
5
6
7
8
Notes:
1) Exceeding these ratings may damage the device.
2) Measured on approximately 1” square of 1 oz copper.
Part Number*
Package
Temperature
MP3351DQ
QFN16-3
–40°C to +85°C
For Tape & Reel, add suffix –Z (eg. MP3351DQ–Z)
For RoHS compliant packaging, add suffix –LF (eg.
MP3351DQ–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
6
V
V
Rising edge, hysteresis = 200mV
2.7
2.8
2.5
50
2.9
VIN Quiescent Current
V(CHARGE)=High, V(SW) = 0, free
run by TONMAX
5
mA
VIN Quiescent Current
Shutdown Current from VIN
VSW Leakage Current
V(CHARGE)=High, V(FB) = 1.3V
V(CHARGE)=Low, VIN =3.3V
VIN=3.3V,VSW=60V, in Shutdown
µA
µA
µA
1
2
SW ON resistance between SW
and GND
Switch turn-on
0.2
ꢀ
Charge Input High Voltage
Charge Input Low Voltage
2.4
V
V
0.6
Pull-down resistance of
CHARGE pin
V(CHARGE)=3.3V
100
kꢀ
IPEAK1
IPEAK2
RSET=43.1kꢀ
RSET=100kꢀ
1.08
0.3
1.20
0.5
1.32
0.7
A
A
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
With 1.2Kꢀ (1%) connected to FB
25
mV
MP3351 Rev. 0.91
9/2/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
2
MP3351 – 60V, 2A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER
ELECTRICAL CHARACTERISTICS (continued)
(VIN=V (CHARGE)=3.3V, TA = +25°C, unless otherwise noted.)
Parameter
Conditions
Min
Typ
Max
Unit
µA
V
RDYB Leakage Current
RDYB Output Low Voltage
MAX TON
V(RDYB)=3.3V
1
ISINK= 2mA
0.2
80
Maximum TON time
Rising edge, Hysteresis = 15oC
50
120
µs
oC
Thermal Shutdown
IGBT Driver
150
IGBTOUT pull-up ON resistance
4
4
ꢀ
ꢀ
IGBTOUT pull-down ON
resistance
IGBTIN Input High Voltage
IGBTIN Input Low Voltage
Propagation delay
2.4
V
V
0.6
IGBTIN rising/falling edge to
IGBTOUT rising/falling edge,
45
ns
C
GATE=6500pF
IGBTOUT rise time
CGATE=6500pF
CGATE=6500pF
60
70
ns
ns
ꢀ
IGBTOUT fall time
Pull down resistance of IGBTIN
100K
PIN FUNCTIONS
Pin#
Name
ISET
GND
Description
1
Peak Current Set Input. The peak current is 5 X104 the current flow out of this pin.
2, 4
Analog Ground. Tie it directly to local ground plane.
Input Supply Pin. Connect it to system supply voltage. Bypass VIN to GND with a
0.1uF or greater ceramic capacitor.
3, 6
5
VIN
IGBTOUT
PGND,
Output Drive for IGBT Gate. Connect this pin to the gate of the IGBT.
Power Ground. Ground connection for the power switch. Connect Exposed Pad to
Exposed Pad PGND.
7, 8
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.
9
CHARGE
12, 13
14
SW
Switch Pin. This is the drain of the internal power switch.
Logic Input Pin for IGBT Drive.
IGBTIN
Open-Drain Power-Ready Output. RDYB becomes low when the output voltage is
reached.
15
16
RDYB
FB
Feedback Pin. Its trip voltage is 1.2V.
MP3351 Rev. 0.91
9/2/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
3
MP3351 – 60V, 2A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER
TYPICAL PERFORMANCE CHARACTERISTICS
VOUT = 300V, ISET = 2A, TA = +25ºC, unless otherwise noted.
50
100 150 200 250 300
2
3
4
5
6
7
1
0
2
3
4
5
6
7
3
4
5
6
7
MP3351 Rev. 0.91
9/2/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
4
MP3351 – 60V, 2A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VOUT = 300V, ISET = 2A, TA = +25ºC, unless otherwise noted.
Flash
MP3351 Rev. 0.91
9/2/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
5
MP3351 – 60V, 2A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER
BLOCK DIAGRAM
IGBT OUT
Figure 1—Functional Block Diagram
MP3351 Rev. 0.91
9/2/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
6
MP3351 – 60V, 2A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER
APPLICATION INFORMATION
MP3351 controlled flyback charger operates in
critical conduction mode with peak current set
by ISET pin. Output voltage is divided down
through R1, R2 and R3 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.
Setting Peak Charge Current
MP3351’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:
50
RSET (KΩ) =
ISET (A)
A minimum TOFF of 20µS provides a minimum
OFF time at the beginning of charging when
DCM comparator always trips because VOUT is
still near zero, Min TOFF will be reduced to
400nS after VO>16V. Charger may enter DCM
mode when charge is close to full and actual
OFF time is less than minimum TOFF. Circuit
will stop switching and RDYB will be pulled low
once the flash capacitor is charged to 300V, a
value set by R1, R2 and R3. When the part is
ready the internal 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.
For example, for 2A peak charge current, RSET
is 24.9kꢀ.
Primary Inductance
The primary inductance is calculated based on
the minimum off time period:
VOUTTMIN,OFF
LPRIMARY
≥
NIPEAK
VOUT: output voltage about 300V
MIN, OFF: Minimum off time 400nsec.
T
IPEAK: primary peak current
Turns Ratio
The minimum turns ratio of the flyback
transformer is obtained as:
VOUT
N ≥
VDS − V
IN
VDS: FET drain-source voltage
VIN: Input voltage 3~5V
DCM Comparator
Setting Output Voltage
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.
The output voltage is set by selecting the
resistive voltage divider ratio. If we use
1.2k For the low side resistor (R3) of the
voltage divider, we can determine the high side
resistor (R1, R2) by the equation:
Charge Speed
The output capacitor charging speed is
determined by:
V
− V
VFB
1
2
OUT
R1 = R2 =
FB R3
ILIM
Typical values are R1=R2=150k
R3=1.2k
ꢀ
and
TCHARGE
∝
1
N
ꢀ
.
+
V
VOUT
IN
Output Diode Selection
The reverse voltage of the output diode is
determined by:
VD = VOUT + NV
IN
MP3351 Rev. 0.91
9/2/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
7
MP3351 – 60V, 2A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER
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.
MP3351 Rev. 0.91
9/2/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
8
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