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參數資料
| 型號： | AZ494B_05 |
| 廠商： | BCD Semiconductor Manufacturing Limited |
| 英文描述： | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| 中文描述： | 脈寬調制控制電路 |
| 文件頁數： | 1/12頁 |
| 文件大?。?/td> | 179K |
| 代理商： | AZ494B_05 |
PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ494B/D
Data Sheet
1
Jun. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
General Description
The AZ494B/D is a voltage mode pulse width modula-
tion switching regulator control circuit designed prima-
rily 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
AZ494B/D is capable for push-pull or single-ended
output operation, which can be selected through the
output control.
AZ494B has 4.95V and AZ494D has 5V reference
voltage respectively. The precision of voltage reference
(V
REF
) is improved up to
±
1.5% through trimming
and this provides a better output voltage regulation.
The AZ494B/D is available in standard packages of
DIP-16 and SOIC-16.
Features
·
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
On-Chip Oscillator with Master or Slave Opera-
tion
·
·
·
·
·
Applications
·
·
·
SMPS
Back Light Inverter
Charger
Figure 1. Package Types of AZ494B/D
SOIC-16
DIP-16
相關PDF資料 |
PDF描述 |
|---|---|
| AZ494B | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| AZ494BM | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| AZ494BM-E1 | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| AZ494BMTR | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| AZ494BMTR-E1 | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AZ494BM | 制造商:BCDSEMI 制造商全稱:BCD Semiconductor Manufacturing Limited 功能描述:PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| AZ494BM-E1 | 制造商:BCDSEMI 制造商全稱:BCD Semiconductor Manufacturing Limited 功能描述:PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| AZ494BMTR | 制造商:BCDSEMI 制造商全稱:BCD Semiconductor Manufacturing Limited 功能描述:PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| AZ494BMTR-E1 | 制造商:BCDSEMI 制造商全稱:BCD Semiconductor Manufacturing Limited 功能描述:PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| AZ494BP | 制造商:BCDSEMI 制造商全稱:BCD Semiconductor Manufacturing Limited 功能描述:PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
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