Anpec Electronics APW7136C
Step-Up Converter
FEATURES
● Wide Input Voltage from 2.7V to 6V● 0.25V Reference Voltage
● Fixed 1MHz Switching Frequency
● High Efficiency up to 87%
● 100Hz to 100KHz PWM brightness control fre- quency
● Open-LED Protection
● Under Voltage Lockout Protection
● Over Temperature Protection
● <1µA Quiescent Current during Shutdown
● SOT-23-6 Package
● Lead Free Available (RoHS Compliant)
APPLICATIONS
● White LED Display Backlighting● Cell Phone and Smart Phone
● PDA, PMP, MP3
● Digital Camera Pin Configuration SOT-23-6 Top View LX 1 GND 2 FB 3 6 VIN 5 OVP 4 EN
GENERAL DESCRIPTION
The APW7136A/B/C is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 8 white LEDs in series. The series connection allows the LED current to be identical for uniform brightness. Its low on-resistance of NFET and feedback voltage reduce power loss and achieves high efficiency. Fast 1MHz current-mode PWM operation is available for input and output capacitors and a small inductor while minimizing ripple on the input supply.