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參數(shù)資料
| 型號(hào)： | SC1101CS |
| 廠商： | Semtech Corporation |
| 英文描述： | VOLTAGE MODE PWM CONTROLLER |
| 中文描述： | 電壓模式PWM控制器 |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大?。?/td> | 96K |
| 代理商： | SC1101CS |
SC1101
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
VOLTAGE MODE PWM CONTROLLER
February 29, 2000
3
TEST CIRCUIT
VOUT=1.25*(R3+R4)/R4
+5V
+12V
VOUT
C9
C1
0.1uF
Q1
BUK556
L1
4uH
R6
2.32k
R5
1.00k
R1
5mOhm
PSD1
R2
10
C11
0.1uF
C10
0.1uF
U1
SC1101CS
GND
8
VCC
1
CS(-)
2
CS(+)
3
PGND
4
DH
5
BST
6
FB
7
See Table
See Table
+
C5
1500uF
+
C6
1500uF
+
C7
1500uF
+
C8
1500uF
+
C4
1500uF
+
C3
1500uF
+
C2
1500uF
J1
J2
J3
J4
VOUT R3
3.45
3.30
3.10
2.90
2.80
2.50
1.50
R4
100
100
100
100
100
100
100
174
165
147
133
124
100
20
ELECTRICAL CHARACTERISTICS
V
CC
= 4.75V to 5.25V; GND = P
GND
= 0V; V
O
= 3.3V; T
A
= 25°C; BST = 12V; Output current = 2A.
Per test circuit, unless otherwise specified.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Reference
V
REF
1.238
1.250
1.263
V
Over Temp
1.225
1.250
1.275
V
Feedback Bias Current
I
FB
2.0
8.0
uA
Quiescent Current
I
Q
Current into V
CC
pin
5.0
8.0
mA
Regulation Load
REG
LOAD
I
O
=1A to 12A
0.5
1.0
%
Regulation Line
REG
LINE
0.5
%
Current Limit Threshold
CLT
CS(+) to CS(-)
60
70
80
mV
Oscillator Frequency
OSC
180
200
220
kHz
Oscillator Frequency Shift
OFS
V
FB
< V
REF
/2
50
kHz
Max Duty Cycle
d.c.
90
95
%
DH Sink/Source Current
I
O
V
BST
- V
DH
= 4.5V
(V
DH
- V
PGND
= 2V)
500
mA
UVLO Threshold
V
UVLO
3.8
V
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