TL4242TDRJRQ1集成电路（IC）的LED驱动器规格书PDF中文资料

TL4242TDRJRQ1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TL4242TDRJRQ1LED 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• Qualified for Automotive Applications

• AEC-Q100 Test Guidance With the Following

Results:

– Device Temperature Grade 2: –40°C to 105°C

Ambient Operating Temperature Range for

WSON package

– Device Temperature Grade 1: –40°C to 125°C

Ambient Operating Temperature Range for

TO-263 package

– Device HBM ESD Classification Level H1C

– Device CDM ESD Classification Level C3B

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

• Wide Input-Voltage Range up to 42 V

• Low Dropout Voltage

• Open-Load Detection

• Overtemperature Protection

• Short-Circuit Proof

• Reverse-Polarity Proof

2 Applications

Automotive LED Lighting Applications Including:

• Rear Light

• Daytime Running Light

• Fog Light

• Position Light

• Interior Light

• Stop or Tail Light

3 Description

The TL4242-Q1 device is an integrated adjustable

constant-current source, driving loads up to 500 mA.

One can adjust the output current level through an

external resistor. The device design is for supplying

high-power LEDs (for example, OSRAM Dragon LA

W57B) under the severe conditions of automotive

applications, resulting in constant brightness and

extended LED lifetime. The device comes in the DRJ

(WSON) and KTT (TO-263) package. Protection

circuits prevent damage to the device in case of

overload, short-circuit, reverse polarity, and overheat.

The device provides the connected LEDs protection

against reverse polarity as well as excess voltages up

to 45 V.

The integrated PWM input of the TL4242-Q1 device

permits LED brightness regulation by pulse-width

modulation (PWM). The high-input impedance of the

PWM input allows operating the LED driver as a

protected high-side switch.