CAT4101 Datasheet | onsemi

1 A Constant-Current LED Driver with PWM Dimming Description The CAT4101 is a constant- current sink driving a string of high- brightness LEDs up to 1 A with very low dropout of 0.5 V at full load. It requires no inductor, provides a low noise operation and minimizes the number of ponents. The LED current is set by an external resistor connected to the RSET pin. The LED pin is patible with high voltage up to 25 V, allowing the driving of long strings of LEDs. The device ensures an accurate and regulated current in the LEDs independent of supply and LED forward voltage variation. The PWM/EN input allows the device shutdown and the LED brightness adjustment by using an external pulse width modulation (PWM) signal. The driver Features a thermal shutdown protection that bees active whenever the die temperature exceeds 150°C. The device is available in a high- power, 5- lead TO- 263 package offering excellent thermal dissipation characteristics. Features - Accurate 1 A Current Sink - Up to 25 V Operation on LED Pin - Low Dropout 500 m V at 1 A - LED Current Set by External Resistor - High Resolution PWM Dimming via EN/PWM - “Zero” Current Shutdown Mode - Thermal Shutdown Protection - TO- 263 (D2PAK) 5- lead Package - This Device is Pb- Free, Halogen Free/BFR Free and is Ro HS pliant Applications - High Power LED up to 1 A - Architectural and General Lighting - Automotive Lighting VCC 3 V to 25 V LEDs VIN 5V OFF ON VIN CAT4101 EN/PWM LED 1A 549 W RSET GND Figure 1. Typical Application Circuit © Semiconductor ponents Industries, LLC,...