MP3351 – 60V, 2A INTEGRATED PHOTO FLASH CHARGER WITH IGBT DRIVER

MP3351 Rev. 0.91

www.MonolithicPower.com

3

9/2/2008

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© 2008 MPS. All Rights Reserved.

Parameter

Conditions

Min

Typ

Max

Unit

RDYB Leakage Current

V(RDYB)=3.3V

1

µA

RDYB Output Low Voltage

0.2

V

50

80

120

µs

Thermal Shutdown

Rising edge, Hysteresis = 15

150

IGBT Driver

IGBTOUT pull-up ON resistance

4

Ω

IGBTOUT pull-down ON

resistance

4

Ω

IGBTIN Input High Voltage

2.4

V

IGBTIN Input Low Voltage

0.6

V

Propagation delay

IGBTIN rising/falling edge to

IGBTOUT rising/falling edge,

45

ns

IGBTOUT rise time

60

ns

IGBTOUT fall time

70

ns

Pull down resistance of IGBTIN

100K

Ω

PIN FUNCTIONS

Pin#

Name

Description

1

ISET

Peak Current Set Input. The peak current is 5 X10

2, 4

GND

Analog Ground. Tie it directly to local ground plane.

3, 6

VIN

Input Supply Pin. Connect it to system supply voltage. Bypass VIN to GND with a

0.1uF or greater ceramic capacitor.

5

IGBTOUT

Output Drive for IGBT Gate. Connect this pin to the gate of the IGBT.

7, 8

PGND,

Exposed Pad

Power Ground. Ground connection for the power switch. Connect Exposed Pad to

PGND.

9

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.

12, 13

SW

Switch Pin. This is the drain of the internal power switch.

14

IGBTIN

Logic Input Pin for IGBT Drive.

15

RDYB

Open-Drain Power-Ready Output. RDYB becomes low when the output voltage is

reached.

16

FB

Feedback Pin. Its trip voltage is 1.2V.