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參數(shù)資料
| 型號： | L296PHT |
| 廠商： | 意法半導體 |
| 英文描述： | HIGH CURRENT SWITCHINGREGULATORS |
| 中文描述： | 大電流SWITCHINGREGULATORS |
| 文件頁數(shù)： | 15/22頁 |
| 文件大?。?/td> | 285K |
| 代理商： | L296PHT |
Figure35 :
P.C. Boardand ComponentLayoutof theCircuit of fig.34 (1:1 scale)
SELECTION OF COMPONENT VALUES (see fig. 34)
Component
Recommended
Value
Purpose
Allowed Rage
Min.
–
Notes
Max.
R1
R2
–
100 k
Set Input Voltage
Threshold for Reset.
220k
R1/R2
V
i min
5
1
If output voltage is sensed R1 and
R2 may be limited and pin 12
connected to pin 10.
R3
R4
4.3 k
10 k
Sets Switching Frequency
Pull-down Resistor
1 k
100k
22k
May be omitted and pin 6 grounded
if inhibit not used.
R5
R6
15 k
Frequency Compensation
Collector Load For Reset
Output
10k
V
O
0.05A
–
–
Omitted if reset function not used.
R7
R8
–
4.7 k
Divider to Set Output
Voltage
–
1k
R7/R8 =V
O
V
REF
V
REF
-
R
iim
–
Sets Current Limit Level
7.5k
If R
is omitted and pin 4 left open
the current limit is internally fixed.
C1
C2
C3
C4
10
μ
F
2.2
μ
F
2.2 nF
2.2
μ
F
Stability
Sets Reset Delay
Sets Switching Frequency
Soft Start
2.2
μ
F
–
1 nF
1
μ
F
–
Omitted if reset function not used.
3.3nF
–
Also determines average short
circuit current.
C5
C6
33 nF
390 pF
Frequency Compensation
High Frequency
Compensation
Output Filter
–
–
Not required for 5 V operation.
C7, C8
L1
Q1
100
μ
F
300
μ
H
–
100
μ
H
–
Crowbar Protection
The SCR must be able to withstand
the peak discharge current of the
output capacitor and the short
circuit current of the device.
7A Schottky or 35 ns t
rr
Diode.
D1
Recirculation Diode
L296 - L296P
15/22
相關PDF資料 |
PDF描述 |
|---|---|
| L296 | HIGH CURRENT SWITCHINGREGULATORS |
| L296P | HIGH CURRENT SWITCHINGREGULATORS |
| L296HT | HIGH CURRENT SWITCHINGREGULATORS |
| L298HN | DUAL FULL-BRIDGE DRIVER |
| L298 | DUAL FULL-BRIDGE DRIVER |
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