ON Semiconductor CAT4134 Dual Channel LED Driver
The ON Semiconductor CAT4134 dual channel movie / Flash LED driver is a high power, dual channel boost converter that provides two matched LED currents. Output current levels are controlled by one of two resistors RSET or RFLASH. When the FLASH input pin is low (movie mode), RSET sets the current. When FLASH is high (flash mode), the resistor RFLASH sets the LED current. Each channel of the ON Semiconductor CAT4134 LED driver drives two or three white LEDs in series and provides a regulated current to control their brightness. Input supply down to 3 V is supported, making the CAT4134 ideal for Li−Ion battery applications. High frequency low noise operation allows this ON Semiconductor device to be used with small external inductors and ceramic capacitors while still maintaining excellent efficiency.