NCP5010

The NCP5010 is a fixed frequency PWM boost converter with integrated rectification optimized for constant current applications such as driving white LEDs. The features of NCP5010 are as follows: (1)2.7 to 5.5 V Input Voltage Range; (2)Efficiency: 84% for 5 LED (VF = 3.5 V by LED) at 30 mA and; (3)4.2 V VIN; (4)Low Noise 1 MHz PWM DC-DC Converter; (5)Open LED Protection and Short Circuit Protection; (6)Serial LEDs Architecture for Uniform Current Matching; (7)1 A Shutdown Current Facility with True-Cutoff.

The following is about the absolute maximum ratings of NCP5010: (1)Power Supply Voltage: 7.0 V; (2)Over Voltage Protection: 24 V; (3)Human Body Model (HBM) ESD Rating: 2000 V; (4)Machine Model (MM) ESD Rating: 200 V; (5)Digital Input Voltage: -0.3 < VIN < Vbat+0.3; (6)Digital Input Current: 1.0mA; (7)Power Dissipation @ TA = +85 °C: 150 mW.

The electrical characteristics of the NCP5010 are: (1)Supply Voltage: 2.7 V to 5.5 V; (2)Switch Current Limit: 280 mA min, 420 mA typ and 560 mA max; (3)Internal Switch On Resistor: 0.6 typ and 1.0 max; (4)PWM Oscillator Frequency: 0.8 to 1.2 MHz; (5)Maximum Duty Cycle: 91 % min and 95 % typ; (6)Efficiency: 84 %; (7)Overvoltage Clamp Voltage: 20 V min and 22 V typ; (8)Overvoltage Clamp Hysteresis: 1.0 V.