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参数资料
| 型号： | A8437ECGLT |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 6/22页 |
| 文件大小： | 0K |
| 描述： | IC PHOTOFLASH CAP CHARGER WLCSP |
| 标准包装： | 24,000 |
| 应用： | 照相机闪光灯电容器充电器，Xenon |
| 电源电压： | 2.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-UFBGA，WLCSP |
| 供应商设备封装： | 12-WLCSP |
| 包装： | 带卷 (TR) |
A8437
Mobile Phone Xenon Photoflash Capacitor Charger
with IGBT Driver
ELECTRICAL CHARACTERISTICS typical values valid at V IN = 3.6 V, R SET = 33 k Ω , I SWlim = 1.0 A, and T A =25°C, unless otherwise noted
Characteristics
VIN Voltage Range
UVLO Enable Threshold
UVLO Hysteresis
VIN Supply Current
Symbol
V IN
V INUV
V INUVhys
I IN
Test Conditions
V IN rising
Shutdown (CHARGE = 0 V,
TRIGGER1 and TRIGGER2 = 0 V)
Charging complete, regulation disabled (REG = VIN)
Charging complete, regulation enabled
Charging (CHARGE = VIN,
TRIGGER1 and TRIGGER2 = 0 V)
Min.
2.3
–
–
–
–
–
–
Typ.
–
2.05
150
0.01
10
0.5
2
Max.
5.5
2.2
–
0.5
50
–
–
Unit
V
V
mV
μ A
μ A
mA
mA
Current Limits
Switch Current Limit 1
SW / ISET Current Ratio
ISET Pin Voltage While Charging
ISET Pin Internal Resistance
Switch On-Resistance
Switch Leakage Current 2
CHARGE Input Current
CHARGE Input Voltage 2
CHARGE Pull-Down Resistor Value
CHARGE ON/OFF Delay
Maximum Switch-Off Timeout
Maximum Switch-On Timeout
ˉDˉ ˉOˉ ˉNˉ ˉEˉ Output Leakage Current 2
ˉDˉ ˉOˉ ˉNˉ ˉEˉ Output Low Voltage 2
Output Comparator Trip Voltage 2
Output Comparator Overdrive
Minimum dV/dt for ZVS Comparator
I SWlimMAX
I SWlimMIN
I SW /I SET
V SET
R SET(INT)
R SWDS(on)
I SWlk
I CHARGE
V CHARGE
R CHPD
t CH
t offMAX
t onMAX
I DONElk
V DONEL
V OUTTRIP
V OUTOV
dV/dt
Maximum, R SET = 26.7 k Ω
Minimum, R SET = 85 k Ω
R SET = 33 k Ω , CHARGE = high
R SET = 33 k Ω , CHARGE = high
V IN = 3.6 V, I D = 800 mA, T A = 25°C
V SW = V IN (max), over temperature range
Combined V IN and SW leakage current at T A =25°C
V IN = 5.5 V in Shutdown
V CHARGE = V IN
High, over input supply range
Low, over input supply range
32 μ A into ˉDˉ ˉOˉ ˉNˉ ˉEˉ pin
Measured as V SW – V IN
Pulse width = 200 ns (90% to 90%)
Measured at SW pin
1.08
–
–
–
–
–
–
–
–
1.1
–
–
–
–
–
–
–
31
–
–
1.2
0.4
28
1.2
1000
0.25
–
–
36
–
–
100
20
18
18
–
–
31.5
200
20
1.32
–
–
–
–
–
2
0.5
–
–
0.4
–
–
–
–
1
100
32
400
–
A
A
kA/A
V
Ω
Ω
μ A
μ A
μ A
V
V
k Ω
us
μ s
μ s
μ A
mV
V
mV
V/ μ s
Regulation
REG Voltage When Charging Completes
REG Voltage Threshold for Regulation
REG Output Current Drive Capability
REG Leakage Current While Not Charging
V REG(H)
V REG(L)
I REG
I REGlk
CHARGE = high, at ˉDˉ ˉOˉ ˉNˉ ˉEˉ → low transition
CHARGE = high, at ˉDˉ ˉOˉ ˉNˉ ˉEˉ = low
CHARGE = high, at ˉDˉ ˉOˉ ˉNˉ ˉEˉ = high, V SW – V IN = 30 V,
V REG = 1.0 V
CHARGE = high, at ˉDˉ ˉOˉ ˉNˉ ˉEˉ = low, V REG = 1.2 V
1.15
–
–
–
1.2
0.96
50
0.1
1.25
–
–
–
V
V
μ A
μ A
IGBT Driver
TRIGGER, TRIGGER2 Input Voltage 2
V TRIG(H)
V TRIG(L)
Input = logic high, over input supply range 1.1 –
Input = logic low, over input supply range – –
–
0.4
V
V
TRIGGER, TRIGGER2 Pull-Down Resistor R TRIGPD
– 100
–
k Ω
GSOURCE Resistance to VIN 3
R SrcDS(on)
V IN = 3.6 V, V GSOURCE =1.8 V – 5
–
Ω
GSINK Resistance to GND 3
R SnkDS(on) V IN = 3.6 V, V GSINK = 1.8 V – 6
–
Ω
Propagation Delay (Rising) t Dr
– 30
–
ns
Propagation Delay (Falling) t Df
Output Rise Time t r
Output Fall Time t f
GSOURCE and GSINK tied together, measurement
taken at pin; R GATE = 12 Ω , C L = 6500 pF, V IN = 3.6 V
– 30
– 70
– 70
–
–
–
ns
ns
ns
1 Current limit guaranteed by design and correlation to static test. Refer to application section for peak current in actual circuits.
2 Specifications over the range T A = –40°C to 85°C; guaranteed by design and characterization.
3 GSOURCE and GSINK tied together (GATE pin) in EJ package.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
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