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AZ7500EM-E1 Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited |
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AZ7500EM-E1 Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited |
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1 / 13 page  PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ7500E Data Sheet 1 Sep. 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited General Description The AZ7500E is a voltage mode pulse width modula- tion switching regulator control circuit designed pri- marily 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) comparator, a pulse-steering control flip-flop, and an output control circuit. The pre- cision of voltage reference (VREF) is improved up to ± 1% through trimming and this provides a better output voltage regulation. The AZ7500E provides for push- pull 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 comparing 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 · 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 Opera- tion Applications · SMPS · Back Light Inverter · Charger Figure 1. Package Types of AZ7500E SOIC-16 DIP-16 |
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