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參數(shù)資料
| 型號： | A8438 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Photoflash Capacitor Charger with IGBT Driver |
| 中文描述： | 照相閃光燈電容充電器采用IGBT驅(qū)動器 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大?。?/td> | 528K |
| 代理商： | A8438 |
A8438-DS, Rev. 1
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Photoflash Capacitor Charger with IGBT Driver
A8438
3
ELECTRICAL CHARACTERISTICS
Typical values at T
A
= 25°C and V
IN
= 3.3 V (unless otherwise noted)
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max. Units
Supply Voltage*
V
IN
3
–
–
–
–
–
5
1
5.5
–
10
1
–
2.0
–
–
1
–
1
–
0.8
1
V
Supply Current
I
IN
Charging
Charging done
Shutdown (V
CHARGE
= 0 V, V
TRIGGER
= 0 V)
V
ILIM
= 0 V
ILIM pin floating
V
ILIM
= V
IN
V
IN
= 3.3 V, I
D
= 800 mA, T
A
= 25°C
V
SW
= 35 V
mA
μ
A
μ
A
A
A
A
Ω
μ
A
μ
s
μ
A
V
V
μ
A
0.01
1.6
1.8
2.0
0.27
0.2
18
–
–
–
–
Primary Side Current Limit
I
SWLIM
1.6
–
–
–
–
–
2
–
–
SW On Resistance
SW Leakage Current*
SW Maximum Off-Time
CHARGE Input Current
R
DS(On)SW
I
SWLKG
t
OFF(Max)
I
CHARGE
V
CHARGE(H)
V
CHARGE(L)
I
DONELKG
V
DONE(L)
V
FB
I
FB
V
UVLO
V
UVLOHYS
V
CHARGE
= V
IN
CHARGE Input Voltage*
ˉD ˉO ˉN ˉˉ Output Leakage Current*
ˉD ˉO ˉN ˉˉ Output Low Voltage*
FB Voltage Threshold*
FB Input Current
UVLO Enable Threshold
UVLO Hysteresis
IGBT Driver
IGBTDRV On Resistance to VIN
IGBTDRV On Resistance to GND
TRIGGER Input Current
32
μ
A into ˉD ˉO ˉN ˉˉ pin
–
–
100
mV
V
nA
V
mV
1.187 1.205 1.223
–
–120
2.55
2.65
–
150
V
FB
= 1.205 V
V
IN
rising
–
2.75
–
R
DS(On)I-V
R
DS(On)I-G
I
TRIGGER
V
TRIGGER(H)
V
TRIGGER(L)
t
Dr
t
Df
t
r
t
f
V
IN
= 3.3 V, V
IGBTDRV
= 1.5 V
V
IN
= 3.3 V, V
IGBTDRV
= 1.5 V
V
TRIGGER
= V
IN
–
–
–
2
–
–
–
–
–
5
6
–
–
–
30
30
70
70
–
–
1
–
Ω
Ω
μ
A
V
V
ns
ns
ns
ns
TRIGGER Input Voltage*
0.8
–
–
–
–
Propagation Delay, Rising
Propagation Delay, Falling
Output Rise Time
Output Fall Time
*Guaranteed by design and characterization over operating temperature range, –40°C to 85°C.
R
gate
=12
Ω
, C
LOAD
= 6500 pF, V
IN
= 3.3 V
R
gate
=12
Ω
, C
LOAD
= 6500 pF, V
IN
= 3.3 V
R
gate
=12
Ω
, C
LOAD
= 6500 pF, V
IN
= 3.3 V
R
gate
=12
Ω
, C
LOAD
= 6500 pF, V
IN
= 3.3 V
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