A8437 Просмотр технического описания (PDF) - Allegro MicroSystems

Номер в каталоге

Компоненты Описание

Список матч

A8437

Mobile Phone Xenon Photoflash Capacitor Charger with IGBT Driver

Allegro MicroSystems 

A8437

Mobile Phone Xenon Photoflash Capacitor Charger

with IGBT Driver

CG Package

A1 A2 A3 A4

B1 B2 B3 B4

C1 C2 C3 C4

Orientation mark

on ball side

Pin-out Diagrams

(Contacts Down Views)

EJ Package

ISET 1

10 REG

GATE 2

VIN 3

EP

9 DONE

8 TRIGGER1

GND 4

7 SW

CHARGE 5

6 TRIGGER2

Terminal List Table

Name

Number

CG EJ

ISET

C4

1

GATE

–

2

GSOURCE B3

–

GSINK

C3

–

VIN

C2

3

GND

C1

4

CHARGE

B1

5

TRIGGER2 B2

6

SW

A1

7

TRIGGER1 A2

8

¯D¯ ¯O¯ ¯N¯ ¯E¯

A3

9

TLIM

A4

–

REG

B4

10

EP

n.a.

–

Function

Sets the maximum switch current; connect an external resistor to GND to set the

desired peak current

IGBT gate drive – sink/source

IGBT gate drive – source

IGBT gate drive – sink

Input voltage; connect to a 2.3 to 5.5 V bias supply

Ground connection

Pull high to initiate charging; pull low to enter low-power standby mode

IGBT input trigger 2

Drain connection of internal power MOSFET switch; connect to transformer

IGBT input trigger 1

Pulls low when output reaches target value and CHARGE pin is high; goes high dur-

ing charging or whenever CHARGE pin is low

For production test only; connect to GND on PCB

Output voltage regulation pin; connect to external resistor and capacitor to regulate

output voltage, or connect to VIN pin to disable regulation (see Output Regulation

section for details)

Exposed pad for enhanced thermal dissipation; not connected electrically

Allegro MicroSystems, Inc.

4

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Share Link: