Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description
The AZ7500B/C is a voltage mode pulse width modul...
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description
The AZ7500B/C is a voltage mode pulse width modulation switching
regulator control circuit designed primarily for power supply control. The AZ7500B/C consists of a reference voltage circuit, two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, 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 AZ7500B/C provides for pushpull or single-ended output operation, which can be selected through the output control. The difference between AZ7500B and AZ7500C is that they have 4.95V and 5V reference voltage respectively. The AZ7500B/C is available in standard packages of DIP-16 and SOIC-16.
AZ7500B/C
Features
· · · · · · Stable 4.95V/5V Reference Voltage Trimmed to ±1.0% Accuracy Uncommitted Output TR for 200mA Sink or Source Current Single-End or Push-Pull Operation Selected by Output Control Internal Circuitry Prohibits Double Pulse at Either Output Complete PWM Control Circuit with Variable Duty Cycle On-Chip Oscillator With Master or Slave Operation
Applications
· · · SMPS Back Light Inverter Charger
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SOIC-16
DIP-16
Figure 1. Package Types of AZ7500B/C
Apr. 2006 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
1
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Pin Configuration
M/P Pack...