参数资料
型号: SC4540ULTRT
厂商: Semtech
文件页数: 8/15页
文件大小: 0K
描述: IC LED DRIVR CONST CURRENT 8MLPD
标准包装: 1
恒定电流:
拓扑: PWM,升压(升压)
输出数: 1
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
频率: 680kHz ~ 920kHz
电源电压: 2.8 V ~ 12 V
输出电压: 5 V ~ 38 V
安装类型: 表面贴装
封装/外壳: 8-UFQFN 裸露焊盘
供应商设备封装: 8-UMLP
包装: 标准包装
工作温度: -40°C ~ 85°C
其它名称: SC4540ULTRTDKR
SC4540
Pin Descriptions
Pin #
1
2
3
4
5
6
7
8
T
Pin Name
LX
EN
ISET
COMP
OUT
BL
GND
IN
Thermal Pad
Pin Function
Collector of the internal power transistor — connect to the boost inductor and rectifying Schottky
diode.
Enable and brightness control pin for LED string
Output current set pin — connect a resistor from this pin to GND to set the maximum current.
Output of the internal transconductance error amplifier — this pin is used for loop compensation
and soft-start. Connect a 1.27k Ω resistor and 47nF capacitor in series to GND.
Boost output voltage monitor pin — internal over-voltage protection monitors the voltage at this
pin. Connect this pin to the output capacitor and the anode of the LED string.
LED constant current sink — connect this pin to the cathode end of the LED string
Ground
Power supply pin — bypass this pin with a capacitor close to the pin
Pad for heatsinking purposes — connect to the ground plane using multiple vias. Not connected
internally.
8
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相关代理商/技术参数
参数描述
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