A8436 Просмотр технического описания (PDF) - Allegro MicroSystems
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A8436 Datasheet PDF : 14 Pages
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A8436
Photoflash Capacitor Charger with IGBT Driver
Functional Block Diagram
VIN
DCM
Comparator
CMP3
1.2 V
18 μs
H→L
Triggered Timer
ILIM
ILIM Decoder
CMP2
ILIM
Comparator
Adjustable
Reference
Enable
CHARGE
DONE
VIN
TRIGGER
IGBTDRV
GND
Control Logic
Q
S SET Q
R CLR Q
Q SET S
Q CLR R
One-Shot
SW
40 V
DMOS
FB
CMP1
1.2 V
Device Pin-out Diagram
NC 1
IGBTDRV 2
VIN 3
GND 4
CHARGE 5
10 ILIM
9 FB
8 DONE
7 TRIGGER
6 SW
Terminal List Table
Number
1
Name
NC
2
IGBTDRV
3
VIN
4
GND
5
CHARGE
6
SW
7
TRIGGER
8
¯D¯ ¯O¯ ¯N¯ ¯E¯
9
FB
10
ILIM
No connection
Function
IGBT driver gate drive output
Power supply input
Device ground
Charging enable; set to low to power-off the A8436
Switch, internally connected to the DMOS power FET drain
Strobe signal input
Open drain, when pulled low by internal MOSFET, indicates that
charging target level has been reached
Output voltage feedback
Switch current limit setting; sets three discreet levels
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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