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AZ494B_05 PDF预览

AZ494B_05

更新时间: 2024-10-26 04:07:35
品牌 Logo 应用领域
BCDSEMI /
页数 文件大小 规格书
12页 168K
描述
PULSE-WIDTH-MODULATION CONTROL CIRCUITS

AZ494B_05 数据手册

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Data Sheet  
PULSE-WIDTH-MODULATION CONTROL CIRCUITS  
AZ494B/D  
General Description  
Features  
The AZ494B/D is a voltage mode pulse width modula-  
tion switching regulator control circuit designed prima-  
rily for power supply control.  
·
·
·
·
·
·
Stable 4.95V for AZ494B or 5V for AZ494D Ref-  
erence Voltage Trimmed to ±1.5% 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  
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  
AZ494B/D is capable for push-pull or single-ended  
output operation, which can be selected through the  
output control.  
On-Chip Oscillator with Master or Slave Opera-  
tion  
AZ494B has 4.95V and AZ494D has 5V reference  
voltage respectively. The precision of voltage reference  
Applications  
(V ) is improved up to ± 1.5% through trimming  
REF  
and this provides a better output voltage regulation.  
·
·
·
SMPS  
Back Light Inverter  
Charger  
The AZ494B/D is available in standard packages of  
DIP-16 and SOIC-16.  
DIP-16  
SOIC-16  
Figure 1. Package Types of AZ494B/D  
BCD Semiconductor Manufacturing Limited  
Jun. 2005 Rev. 1. 1  
1

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