A8426 Просмотр технического описания (PDF) - Allegro MicroSystems
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A8426 Datasheet PDF : 16 Pages
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A8426
High Performance Photoflash Capacitor Charger
with IGBT Driver
Pin-out Diagram
GSOURCE 1
12 TLIM
GSINK 2
11 DONE
EP
VIN 3
10 TRIGGER1
GND 4
9 SW
(Top View)
Terminal List Table
Number
Name
1
GSOURCE
2
GSINK
3
VIN
4
5
6, 7, 13
8
9
10
11
12
14
15
16
–
GND
CHARGE
NC
TRIGGER2
SW
TRIGGER1
¯D¯ ¯O¯ ¯N¯ ¯E¯
TLIM
FB
ISET
VDRV
EP
Function
IGBT gate drive – source connection
IGBT gate drive – sink connection
IC bias input, connect to a 3.0 to 5.5 V supply; for single Li+ battery applications this pin may be connected to the
battery with sufficient decoupling
Ground connection
Pull high to initiate charging; pull low to enter low-power standby mode
No connection
IGBT input trigger 2; internally ANDed with TRIGGER1 pin
Swtich pin; drain connection of internal power DMOSFET switch
IGBT input trigger 1; internally ANDed with TRIGGER2 pin
Open drain pin; indicates charge complete when pulled low by internal MOSFET
For production test only; connect to GND on PCB
Output feedback
Sets the maximum switch current; connect an external resistor to GND to set the target peak current
Supply for IGBT gate driver
Exposed pad for enhanced thermal dissipation
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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