B3M5168A

. Data Sheet B3M5168A B3M5168A High Efficiency PWM Controller Version: 1.0 Notice All information contained in this document is subject to change without notice. Confidential, for authorized user only page 1 of 8 . Features: 2.7V ~ 5.5V Operation Voltage Support Fixed Frequency or Resonance PWM Control 85 % High Efficiency Built-in PWM Dimming Programmable Striking Voltage Latched Open Lamp Protection ON/OFF Control with zero Standby Current Rail-to-Rail Totem Pole Output Low Power CMOS Process Winding/Piezoelectric Transformer driving Algorithm Applications: Cold Cathode Fluorescent Lamps system External Electrode Fluorescent Lamps system Personal Digital Assistants Digital Camera Tablet PC Navigation Devices (GPS Equipment) Notebook Computer LCD Monitor Video Phone/ Door Phone Recommended Operating Condition: Supply Voltage…………………………….2.7 ~ 5.5 V Operating Ambient Temperature………...0 ~ 70 Operating Frequency………………….….30K ~ 400K Hz Pin Layout: INN CMP AGND OLP RTOSC RTDLY CTOSC PGND NOUT2 NOUT1 1 10 B3M5168A 20 CLAMP SST AVDD DIMDC CTPWM PWMOUT EA PVDD POUT2 POUT1 11 General Description: B3M5168A integrated circuit provides the essential features for PWM control in a small 20-pin SSOP package. New developed PWM configuration provides a general solution to control circuitry to regulate the current of the lamps. B3M5168A senses the lamp current directly to enable the built-in PWM dimming. If no current flow into the lamp, B3M5168A provides a continuous AC output to e...