參數(shù)資料
型號: TL497
廠商: Texas Instruments, Inc.
元件分類: 基準電壓源/電流源
英文描述: SWITCHING VOLTAGE REGULATORS
中文描述: 開關穩(wěn)壓器
文件頁數(shù): 8/9頁
文件大?。?/td> 137K
代理商: TL497
TL497A
SWITCHING VOLTAGE REGULATORS
SLVS009D – JUNE 1976 – REVISED JULY 1999
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
3-Term
Reg < 12 V
Switching
Circuit
Control
14
13
TL497A
5
VO
VI
VI
VO
R2
1 k
R1
Q2
10 mA
RCL
Vreg
14
13
5
TL497A
CURRENT LIMIT FOR EXTENDED INPUT CONFIGURATION
Q1
RCL
VBE(Q1)
Ilimit (PK)
R1
VI
IB(Q2)
R2
Vreg
1 10 k
Control
DESIGN EQUATIONS
Switching
Circuit
EXTENDED INPUT CONFIGURATION WITHOUT CURRENT LIMIT
3-Term
Reg < 12 V
Figure 4. Extended Input Voltage Range (V
I
> 12 V)
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