AZ7500E Datasheet | BCD Semiconductor

.. Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description The AZ7500E is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control. The AZ7500E consists of a reference voltage circuit, two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) parator, a pulse-steering control flip-flop, and an output control circuit. The precision of voltage reference (VREF) is improved up to 1% through trimming and this provides a better output voltage regulation. The AZ7500E provides for pushpull or single-ended output operation, which can be selected through the output control. AZ7500E is the enhanced version of AZ7500B for it improves REF Pin's reliability paring with AZ7500B. The AZ7500E is available in standard packages of DIP-16 and SOIC-16. Features - - - - - - Stable 4.95V Reference Voltage Trimmed to ±1.0% Accuracy Unmitted Output TR for 200m A Sink or Source Current Single-End or Push-Pull Operation Selected by Output Control Internal Circuitry Prohibits Double Pulse at Either Output plete PWM Control Circuit with Variable Duty Cycle On-Chip Oscillator With Master or Slave Operation Applications - - - SMPS Back Light Inverter Charger SOIC-16 DIP-16 Figure 1. Package Types of AZ7500E Oct. 2008 Rev. 1. 2 1 BCD Semiconductor Manufacturing Limited .. Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ7500E Pin Configuration M Package (SOIC-16) 1IN + 1IN FEEDBACK DTC CT RT GND C1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 P Package (DIP-16) 2IN + 2IN REF OUTPUT CTRL VCC C2 E2 E1 1IN + 1IN FEEDBACK DTC CT RT GND C1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 2IN + 2IN REF OUTPUT CTRL VCC C2 E2 E1 Figure 2. Pin Configuration of AZ7500E (Top View) Output Function Control Table Signal for Output Control VI = GND VI = VREF Output Function Single-ended or parallel output Normal push-pull operation Functional Block...