TL4242DRJR.A中文资料德州仪器数据手册PDF规格书

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.