Monolithic Dual Channel PWM Controller
AP2001
Features
- Dual PWM Control Circuitry - Operating voltage can be up to 5...
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...