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參數(shù)資料
| 型號： | TL497AY |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.5 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, UUC13 |
| 封裝： | DIE |
| 文件頁數(shù)： | 18/20頁 |
| 文件大?。?/td> | 700K |
| 代理商： | TL497AY |
TL497A
500mA PEAK STEPUP, STEPDOWN, INVERTING SWITCHING VOLTAGE REGULATOR
SLVS009F JUNE 1976 REVISED FEBRUARY 2005
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
VI
RCL
14 13
10
8
TL497A
12
3
4
5
CT
R1
R2 = 1.2 k
CO
RCL
14
13
10
8
R1
CT
L
VO
L
VO
12
3
4
5
DESIGN EQUATIONS
I
(PK) +
2I
O
max 1
)
V
O
V
I
L(
mH) +
V
I
(PK)
ton(ms)
C
T
(pF)
[ 12 ton(ms)
R1
+
V
O
–1.2 V k
W
Choose L (50 to 500
H), calculate
ton (10 to 150 s)
R
CL +
0.5 V
I
(PK)
C
O
(
mF) [ ton(ms)
V
I
V
O
I
(PK) )
I
O
V
ripple
(PK)
EXTENDED POWER CONFIGURATION
(using external transistor)
R2 = 1.2 k
TL497A
CO
BASIC CONFIGURATION
(Peak Switching Current = I(PK) < 500 mA)
Use external catch diode, e.g., 1N4001, when building an inverting supply with the TL497A.
Figure 3. Inverting Applications
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