CN5610

Switch-Mode High-Brightness LED Driver CN5610 General Description: The CN5610 is a PFM high efficiency LED driver control IC. It allows efficient operation of high brightness LED from input voltage ranging from 3V to 450V. The CN5610 controls an external N channel MOSFET or NPN transistor at the frequency up to 300KHz. The LED string is driven at constant current rather than constant voltage, thus providing constant light output and enhanced reliability. The output current can be programmed from 30mA to 1.2A with an external resistor. The other features include soft start circuit, inductor current limit circuit, etc. The CN5610 is available in a 8-pin SOP package. Applications: z LED Lighting z DC-DC or AC-DC LED Driver Application z Back Lighting of Flat Panel Displays z RGB Back Lighting LED Driver Features: z Operating Supply Voltage Range: 3V to 6V z Programmable Inductor Current Limit Level z Soft Start Circuit z Driving up to hundreds of LEDs z Adjustable Output Current up to 1.2A z Operating Temperature Range: 40 to 85 z Available in 8-pin SOP Packages z Pb-free Pin Assignment VDD 1 GND 2 CL 3 NC 4 8 CS CN5610 7 DRV 6 CLSET 5 NC www.consonance-elec.com REV 1.0 1 Typical Application Circuit Input Supply Voltage 6V to 450V R6 R3 R1 Q1 C1 R4 Q2 L1 LED R2 LED string LED D2 D1 C2 R5 1 VDD 67 CLSET DRV CN5610 8 CS CL 3 GND 2 M1 NMOSFET C3 Figure 1 Typical Application Circuit In Figure 1, z L1 is the inductor, generally the inductance may be aro...