Description
The AZ494B/D is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control. The AZ494B/D 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 ± 1.5% through trimming and this provides a better output voltage regulation. The AZ494B/D provides for push-pull or single-ended output operation, which can be selected through the output control.
FEATUREs
• Stable 4.95V/5V Reference Voltage Trimmed to ±1.5% Accuracy
• Uncommitted Output TR for 200mA Sink or Source Current
• Single-End or Push-Pull Operation Selected by Out put 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
Benefits
• Very competitive price
Additional Available Materials
• Samples
• Data Sheet
• Reliability Report
• ESD Report
• Application Notes
• Demo Board