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参数资料
| 型号： | SC618ULTRT |
| 厂商： | Semtech |
| 文件页数： | 4/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER PHOTO FLASH 10-MLP |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | 切换式电容器（充电泵） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 250kHz |
| 电源电压： | 3 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-UFDFN 裸露焊盘 |
| 供应商设备封装： | 10-MLPD（3x3） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 1359 (CN2011-ZH PDF) |
| 其它名称： | SC618ULDKR |
NOT RECOMMENDED FOR NEW DESIGN
Electrical Characteristics (continued)
SC618
Parameter
Flash Mode Pulse Duration (2)
Flash Mode Start-Up Time (2)
Flash Mode Safety Timer (2)
Symbol
t FLASH
t F-SU
t SAFE
Conditions
3.3V < V IN < 4.2V
I OUT = 500mA, V OUT > 2.8V
t = 0 when FLASH goes high to
I OUT = 90% of final value
FLASH high
Min
0.90
Typ
Max
500
1
1.25
Units
ms
ms
s
Spotlight Mode
Start-Up Time (2,3)
Oscillator Frequency
Oscillator Frequency Accuracy
Short-Circuit Output
Current Limit
t S-SU
f OSC
Δ f OSC
I SC
V IN = 4.2V, V OUT = 3.2V; t = 0 when CTRL goes high
to I OUT = 90% of final value
Device enabled
Steady State with VOUT shorted to GND
-15
250
1
15
600
ms
kHz
%
mA
2x mode, 3.3V < V IN < 4.2V
2.1
Input Current Limit
I LIMIT
A
2x mode, V IN = 3.7V, V OUT = 3.7V, T A = 25°C
1.38
1.53
Over-Temperature Protection (2)
T OT
T OT -HYS
Rising threshold
Hysteresis
150
10
°C
Logic Input High Threshold
Logic Input Low Threshold
Logic Input High Current
V IH
V IL
I IH
FLASH, CTRL
FLASH, CTRL
FLASH
CTRL
1.5
1
2
20
40
0.4
35
70
V
V
μA
Logic Input Low Current
I IL
FLASH, CTRL
0.1
2.0
μA
Spotlight mode — I OUT = 200mA
25
ISET Ripple Voltage
V ISET(P-P)
FLASH mode — I OUT = 500mA
100
mV
Notes:
1) V OUT required by the typical LED at this current.
2) Guaranteed by design - not tested in production.
3) If conditions force 2x mode operation, this start-up time will increase by approximately 32ms due to the timer that is enabled to ensure 2x
mode is needed.
4
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