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參數(shù)資料
| 型號： | SC4540ULTRT |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 920 kHz SWITCHING FREQ-MAX, DSO8 |
| 封裝： | 2 X 2 MM, ROHS COMPLIANT, MLPD-8 |
| 文件頁數(shù)： | 14/15頁 |
| 文件大?。?/td> | 281K |
| 代理商： | SC4540ULTRT |
8
Pin Descriptions
SC4540
Pin #
Pin Name
Pin Function
1LX
Collector of the internal power transistor — connect to the boost inductor and rectifying Schottky
diode.
2
EN
Enable and brightness control pin for LED string
3
ISET
Output current set pin — connect a resistor from this pin to GND to set the maximum current.
4
COMP
Output of the internal transconductance error amplifier — this pin is used for loop compensation
and soft-start. Connect a 1.27kΩ resistor and 47nF capacitor in series to GND.
5
OUT
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.
6
BL
LED constant current sink — connect this pin to the cathode end of the LED string
7
GND
Ground
8
IN
Power supply pin — bypass this pin with a capacitor close to the pin
T
Thermal Pad
Pad for heatsinking purposes — connect to the ground plane using multiple vias. Not connected
internally.
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