A8439EEJTR-T 데이터 시트보기 (PDF) - Allegro MicroSystems
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A8439EEJTR-T Datasheet PDF : 14 Pages
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A8439
Photoflash Capacitor Charger with IGBT Driver and Refresh
Performance Characteristics, continued
Tests performed using application circuit shown in figure 8
with ISWLIM set to 1.4A (Single rising edge on CHARGE pin), unless otherwise noted
Charge Time
VBIAS = 3.3 V, COUT = 100 μF
Connect VBATT to a separate power supply
88
77
66
55
44
33
VVOOUUTT==332200VV
VVOOUUTT==330000VV
22
22.0 22.5.5 33.0 3.53.5 4 4.0 4.5 4.5 5 5.50.5 5.65 6.0
VVBABTATT(TV()V)
90
80
70
60
50
40
100
Efficiency
VBATT = VBIAS , TA = 25°C
VBATT = 5.0 V
VBATT = 4.2 V
VBATT = 3.0 V
150
200
250
300
350
VOUT (V)
Symbol
C1
C2
C3
C4
t
Conditions
Parameter
VOUT
VSW
VBATT
IPrimary
time
Parameter
VOUT
VBATT
Units/Division
50 V
10 V
5V
500 mA
2 μs
Value
300 V
VIN
VBATT
C3
VOUT
VSW
C2
IPrimary
C4
C1
Typical Switching Waveform
t
IGBT Drive Timing Definition
TRIGGER
IGBTDRV
50%
t Dr
tr
90%
10%
50%
t Df
tf
90%
10%
Allegro MicroSystems, Inc.
7
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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