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.