MP3356DG-LF-Z [MPS]
Interface Circuit, 2 X 2 MM, ROHS COMPLIANT, MO-229, QFN-10;
| 型号： | MP3356DG-LF-Z |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | Interface Circuit, 2 X 2 MM, ROHS COMPLIANT, MO-229, QFN-10 接口集成电路 |
| 文件： | 总10页 (文件大小：588K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP3356
High Voltage Photo Flash Charger
and IGBT Driver for DSC
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP3356 is a fast, highly efficient and
precision high voltage photo-flash charger for
DSC xenon flash.
•
•
•
•
•
Integrated 50V, 0.5Ω Power Switch
1.5A peak current limit
2.5% Charge Accuracy
<1uA Shutdown Current
Integrated IGBT Driver
The MP3356 has a peak current of 1.5A. A
50V, 0.5Ω internal power switch lowers
transformer turns ratio and switching losses
associated with the primary leakage inductance
and winding capacitance. Integrated secondary
feedback resistors provide +/-2.5% output
voltage charge accuracy. MP3356 also has an
integrated IGBT driver.
APPLICATIONS
•
•
Digital Still Cameras
Optical Film Cameras
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
MP3356 is available in the 10-pin, 2X2 flip chip
package.
TYPICAL APPLICATION
VIN
GND
U1
VIN
VIN
SW
FB
AGND
MP3356
CHAG
EN
5, 6, 7, 8
4
PG
PG
IGBTOUT
1, 2, 3
IGBTIN
IGBTIN
PGND
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
1
MP3356 – HIGH VOLTAGE PHOTO FLASH CHARGER AND IGBT DRIVER FOR DSC
ORDERING INFORMATION
Part Number*
Package
Top Marking
Free Air Temperature (TA)
MP3356DG
10-pin, 2x2 Flip QFN
4PY
–40°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP3356DG–Z).
For RoHS Compliant Packaging, add suffix –LF (e.g. MP3356DG–LF–Z)
PACKAGE REFERENCE
TOP VIEW
VIN
10
IGBTIN
IGBTOUT
SW
1
2
3
4
9
8
7
6
VIN
AGND
PGND
EN
PG
5
FB
Thermal Resistance (4)
2x2 Flip Chip...........................80 ...... 16...°C/W
θJA
θJC
ABSOLUTE MAXIMUM RATINGS (1)
VIN to AGND.......................................-0.3Vto 6V
EN, IGBTIN, IGBTOUT,
to AGND-0.3Vto 6V
PG
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.
FB to AGND...................................-60V to 350V
SW to AGND...................................-0.3V to 50V
PGND to AGND ……………………-0.3V to 0.3V
Storage Temperature............... -55°C to +150°C
Continuous Power Dissipation (TA = +25°C) (2)
…………………………………………..…....1.6W
Junction Temperature............................ +150°C
Lead Temperature (Solder).....................+260°C
Recommended Operating Conditions (3)
Supply Voltage VIN .............................2.8V to 6V
Operating Junct. Temp (TJ)..... –40°C to +125°C
3) The device is not guaranteed to function outside of its operating
conditions.
4) Measured on JESD51-7, 4-layer PCB.
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
2
MP3356 – HIGH VOLTAGE PHOTO FLASH CHARGER AND IGBT DRIVER FOR DSC
ELECTRICAL CHARACTERISTICS
VIN = VEN = 3.6V, TA = +25°C, unless otherwise noted.
Parameter
Conditions
Min
Typ
Max
Unit
Photoflash Capacitor Charger
VIN Voltage Range
2.8
6
V
V
Rising edge, hysteresis = 200mV
typical
VIN UVLO
2.5
VIN Quiescent Current
VIN Quiescent Current
Shutdown Current from VIN
VSW Leakage Current
SW ON Resistance between SW
and PGND
V(EN)=High, V(FB) = 0
V(EN)=High, V(FB) = 336V
V(EN)=Low, VIN =3.6V
1
2
100
1
mA
µA
µA
µA
VIN=3.6V, VSW=50V, in Shutdown
1
Switch turn-on, ISW=100mA ,VIN=3.6V
0.5
Ω
EN Input High Voltage
EN Input Low Voltage
Pull-down Resistance of EN pin
IPEAK
2.4
V
V
kΩ
A
0.6
V(EN)=3.6V
Peak Current Limit
100
1.5
1.2
1.7
Charge completion detect voltage
at FB
294
302
310
V
FB Resistance
DCM Comparator threshold
V(FB)=30V
315
5
kΩ
V
V(PG)=3.6V
ISINK= 2mA
1
µA
V
Leakage Current
PG
0.1
Output Low Voltage
PG
MAX TON
Thermal Shutdown
IGBT Driver
Maximum TON time
70
150
µS
oC
Rising edge, hysteresis = 15oC
IGBTOUT pull-up ON resistance
6
6
Ω
Ω
IGBTOUT
resistance
pull-down
ON
IGBTIN Input High Voltage
IGBTIN Input Low Voltage
2.4
V
V
0.6
40
IGBTIN
IGBTOUT
rising/falling
rising/falling
edge
to
edge,
Propagation delay
nS
Cgate=6800pF
Cgate=6800pF
Cgate=6800pF
IGBTOUT rise time
IGBTOUT fall time
Pull down resistance of IGBTIN
130
180
90
nS
nS
kΩ
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
3
MP3356 – HIGH VOLTAGE PHOTO FLASH CHARGER AND IGBT DRIVER FOR DSC
PIN FUNCTIONS
Pin #
Name
Description
1
2
3
IGBTIN
Logic Input Pin for IGBT Drive.
IGBTOUT Output Drive for IGBT Gate. Connect this pin to the gate of the IGBT.
SW
Switch Pin. This is the drain of the internal power switch.
Open-Drain Power-Ready Output.
reached.
Feedback Pin. Its trip voltage is 300V
becomes low when the output voltage is
PG
4
5
PG
FB
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.
6
EN
7
8
PGND
AGND
Power Ground
Analog ground. Tie it directly to local ground plane.
Input Supply Pin. Connect it to system supply voltage. Bypass VIN to AGND with a
0.1uF or greater ceramic capacitor.
9,10
VIN
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
4
MP3356 – HIGH VOLTAGE PHOTO FLASH CHARGER AND IGBT DRIVER FOR DSC
TYPICAL PERFORMANCE CHARACTERISTICS
TA = +25°C, unless otherwise noted.
Charge Time vs.
Input Voltage
Efficiency
Vin=3V, Iset=1.5A
with 1:8 transformer
Line Regulation
3900
3600
3300
3000
2700
2400
2100
1800
1500
1200
900
85
80
75
70
65
60
55
50
45
40
1.001
1
Vin=6V, Lpri=9.8uH
Iset=1.5A, Cout=100uF, Vo=300V
0.999
0.998
0.997
0.996
0.995
0.994
0.993
Iset=1.5A, Cout=47uF, Vo=300V
Vin=4.5V, Lpri=9.8uH
Vin=3V, Lpri=9.8uH
Iset=1.5A, Cout=47uF, Vo=300V
600
2.5
70 110 150 190 230 270 310
2.5
3
3.5
4
4.5
5
5.5
6 6.5
3
3.5
4
4.5
5
5.5
6 6.5
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Output Voltage vs.
Input Voltage
295.2
294.9
294.6
294.3
294
Iset=1.5A, Cout=47uF, Vo=300V
293.7
293.4
293.1
2.5
3
3.5
4
4.5
5
5.5
6 6.5
INPUT VOLTAGE (V)
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
5
MP3356 – HIGH VOLTAGE PHOTO FLASH CHARGER AND IGBT DRIVER FOR DSC
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TA = +25°C, unless otherwise noted.
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
6
MP3356 – HIGH VOLTAGE PHOTO FLASH CHARGER AND IGBT DRIVER FOR DSC
BLOCK DIAGRAM
SW
PG
Delay
300ns
S
Q
Q
EN
R
+
-
VILIM
FB
27mV
+
-
One
Shot
Q
Q
S
R
VIN
+
-
1.2V
IGBTIN
IGBTOUT
Figure 1—Functional Block Diagram
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
7
MP3356 – HIGH VOLTAGE PHOTO FLASH CHARGER AND IGBT DRIVER FOR DSC
OPERATION
The MP3356 controlled flyback charger operates
in critical conduction mode with 1.5A peak
current. The output voltage is divided down
through an internal 300: 1 resistive divider from
the positive terminal of the transformer
secondary (FB pin) and compares it with an
blanking for turn off transition. The circuit will stop
switching and will be pulled low once the
PG
flash capacitor is charged to 300V. This value is
set by the internal 300:1 R divider and the 1.2V
reference. When charge is complete, the part will
shut down its internal circuitry and draw less than
100uA drawn from Vin. The EN pin will restart the
charge. Bringing the EN pin low terminates the
power delivery and puts the part in shutdown. A
maximum TON timer prevents pulling current from
a depleted battery. If the ON time exceeds the
maximum TON, the switch is forced OFF
regardless of IPEAK detection.
internal 1.2V reference.
The low to high
transition of the EN pin will enable the flyback
converter to switch.
A constant TOFF of 20µs is used when the output
voltage is below 20V to avoid inrush current. The
boundary mode operation will follow to minimize
charge time when the output voltage is above
20V. A minimum TOFF of 200ns serves as
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
8
MP3356 – HIGH VOLTAGE PHOTO FLASH CHARGER AND IGBT DRIVER FOR DSC
APPLICATION INFORMATION
Charge Speed
Turns Ratio
The output capacitor charging speed is
determined by:
The minimum turns ratio of the flyback
transformer is obtained as:
VOUT
ILIM
N ≥
T
∝
charge
N
Vds − V
IN
V +
IN
VOUT
VDS: FET drain-source voltage
VIN: Input voltage 3~5V
Primary Inductance
Output Diode Selection
The primary inductance is calculated based on
the minimum off time period:
VOUTTmin,off
The reverse voltage of the output diode is
determined by:
Iprimary
≥
VD = VOUT +NV
IN
NIPEAK
VOUT: output voltage about 300V
MIN-OFF Minimum off time 200ns.
PEAK: primary peak current
T
I
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
9
MP3356 – HIGH VOLTAGE PHOTO FLASH CHARGER AND IGBT DRIVER FOR DSC
PACKAGE INFORMATION
QFN 10 (2mm×2mm)
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.
MP3356 Rev. 0.91
1/29/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
10
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