a8438eej-t Allegro MicroSystems, Inc., a8438eej-t Datasheet - Page 9

• Manufacturer Part Number: a8438eej-t
• Description: A8438 Photoflash Capacitor Charger With Igbt Driver
• Manufacturer: Allegro MicroSystems, Inc.

A8438
Performance Characteristics, continued
Tests performed using application circuit shown in figure 4 (unless otherwise noted)
6.5
5.5
4.5
3.5
2.5
1.5
V
BIAS
2.0
Connect VBATT to a separate power supply
= 3.3 V, C
2.5
OUT
3.0
Charge Time
= 100 μF, I
3.5
V
BATT
TRIGGER
IGBTDRV
(V)
LIM
4.0
= 2 A, V
4.5
OUT
Photoflash Capacitor Charger with IGBT Driver
5.0
IGBT Drive Timing Definition
= 300 V
5.5
50%
t
10%
Dr
90%
t
r
90
80
70
60
50
40
100
50%
V
BATT
90%
t
= 3.0 V, V
Df
10%
150
t
IN
f
= 5.0 V
V
BATT
= V
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Efficiency
IN
V
T
OUT
= 3.3 V
200
A
= 25°C
(V)
V
BATT
250
= V
IN
= 5.0 V
300
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