TL4242DRJR集成电路（IC）的LED驱动器规格书PDF中文资料

TL4242DRJR属于集成电路（IC）的LED驱动器。由美国德州仪器公司制造生产的TL4242DRJRLED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。

1 Features

1• Adjustable Constant Current up to 500 mA (±5%)

• PWM Brightness Regulation

• Wide Input Voltage Range up to 42 V

• Low Drop Voltage

• Open-Load Detection

• Overtemperature Protection

• Short-Circuit Proof

• Reverse-Polarity Proof

• Wide Temperature Range: –40°C to 150°C

2 Applications

• Signage

• Industrial Lighting

• Printers

3 Description

The TL4242 device is an integrated, adjustable,

constant-current source that can drive loads up to 500 mA. The output current level can be adjusted

through an external resistor. The device is designed

to supply high-power LEDs. The TL4242 is provided

in the DRJ (WSON) package. Protection circuits prevent damage to the device in case of overload,

short circuit, reverse polarity, and overtemperature.

The connected LEDs are protected against reverse

polarity as well as excess voltages up to 45 V.

The integrated PWM input of the TL4242 permits

LED brightness regulation by pulse-width modulation

(PWM). Due to the high input impedance of the PWM

input, the LED driver can be operated as a protected

high-side switch.

The TL4242 is characterized for operation from

–40°C to 150°C.