A8425 데이터 시트보기 (PDF) - Allegro MicroSystems

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A8425

High Current Photoflash Capacitor Charger with IGBT Driver for Two Li+ Batteries

Allegro MicroSystems 

A8425

High Current Photoflash Capacitor Charger

with IGBT Driver for Two Li+ Batteries

ELECTRICAL CHARACTERISTICS (continued) typical values valid at VIN = VBAT= 3.6 V, RSET = 40 kΩ, ISWlim = 2.0 A, and TA=25°C, unless

otherwise noted

Characteristics

Symbol

Test Conditions

Min. Typ. Max. Unit

IGBT Driver

VDRV Pin IGBT Driver Supply Voltage

VDRV

3

–

5.5

V

TRIGGERx Pins Input Current

ITRIG

VTRIGGER = VIN

–

36

–

μA

TRIGGERx Pins High Input Voltage1

VTRIG(H) Over input supply range, VIN

1.4

–

–

V

TRIGGERx Pins Low Input Voltage1

VTRIG(L) Over input supply range, VIN

–

–

0.4

V

TRIGGERx Pins Pull-down Resistor

RTRIGPD

–

100

–

kΩ

GSOURCE On-Resistance to VDRV

RSrcDS(on) VDRV = 3.6 V, VGSOURCE= 1.8 V

–

6

–

Ω

GSINK On-Resistance to GND

RSnkDS(on) VDRV = 3.6 V, VGSINK= 1.8 V

–

20

34

Ω

Propagation Delay (Rising)

tdr

–

30

–

ns

Propagation Delay (Falling)

Output Rise Time

tdf

Connect GSOURCE to GSINK, RGATE = 12 Ω,

tr

CLOAD = 6500 pF, VDRV = 3.6 V

–

140

–

ns

–

80

–

ns

Output Fall Time

tf

–

320

–

ns

1Specifications over the range TA= –40°C to 85°C; guaranteed by design and characterization.

2Current limit guaranteed by design and correlation to static test. Refer to Application Information section for peak current in actual circuits.

Allegro MicroSystems, Inc.

6

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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