AP2001

Monolithic Dual Channel PWM Controller AP2001 Features - Dual PWM Control Circuitry - Operating voltage can be up to 50V - Adjustable Dead Time Control (DTC) - Under voltage Lockout (UVLO) Protection - Short Circuit Protection (SCP) - Variable Oscillator Frequency...... 500Khz Max - 2.5V voltage reference Output - 16-pin PDIP and SOP packages Applications - Backlight inverter - DC/DC converts in computers, etc. General Description The AP2001 integrates Pulse-width-Modulation (PWM) control circuit into a single chip, mainly designs for power-supply regulator. All the functions included an on-chip 2.5V reference output, two error amplifiers, an adjustable oscillator, two dead-time comparators, UVLO, SCP, DTC circuitry, and dual common-emitter(CE) output transistor circuit. Recommend the output CE transistors as pre-driver for Driving externally. The DTC can provide from 0% to 100%. Switching frequency can be adjustable by trimming RT and CT. During low VCC situation, the UVLO makes sure that the outputs are off until the internal circuit is operational normally. Pin Assignments ( Top View ) CT RT EA1+ EA1- FB1 DTC1 OUT1 GND 1 2 3 4 5 6 7 8 16 REF 15 SCP 14 EA2+ 13 EA212 FB2 11 DTC2 10 OUT2 9 VCC PDIP/SOP Pin Descriptions Name CT RT EA+ EA FB DTC OUT GND VCC SCP REF Description Timing Capacitor Timing Resistor Error Amplifier Input(+) Error Amplifier Input(-) Feedback Loop Compensation Dead Time Control Pre-driver Output Ground Supply Voltage Short Circuit Protection...