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參數(shù)資料
| 型號： | CM3843CS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | CURRENT MODE PWM CONTROLLER |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 638K |
| 代理商： | CM3843CS |
CM3842/3843
C
URRENT
M
ODE
PWM C
ONTROLLER
2001/06/27
Advanced
Champion Microelectronic Corporation
Page 4
RECOMMENDED OPERATING CONDITIONS
Recommended Operating
Parameter
Symbol
Min.
Typ.
Max.
Units
Supply Voltage
V
CC
/ V
C
V
I
,R
T
/C
T
V
I
,I
SENSE
/V
FB
V
O
, Output
I
CC
I
O
I
O(REF)
C
T
f
OSC
T
A
30
V
Input Voltage
0
5.5
V
Output Voltage
Supply Current
Average Output Current
Reference Output Current
Timing Capacitor
Oscillator Frequency
Operating Free-air Temperature
0
1
0
30
25
200
-20
500
70
V
mA
mA
mA
nF
KHz
100
O
C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperature for CM384X with 0
T
A
≤
70
maintains junction and case temperatures equal to the ambient temperature.
O
C
≤
O
C; V
CC
= 15V(note 7); R
T
= 10K;C
T
= 3.3nF. Low duty cycle pulse testing techniques are used which
CM384X
Parameter
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Reference Section
Reference output Voltage
V
REF
T
J
= 25
12V
≤
V
CC
≤
25V,T
J
= 25
1mA
≤
I
REF
≤
20mA
T
J
= 25
O
C, I
REF
= 1mA
4.9
5.0
5.1
V
Line Regulation
O
C
6
20
mV
Load Regulation
6
25
mV
Short Ciruit Output Current
I
SC
O
C
-30
-100
-180
mA
Oscillator Section
Oscillation Frequency
f
T
J
= 25
12V
≤
V
CC
≤
25V
O
C
47
52
57
KHz
Frequency Change with Voltage
0.2
1.0
%
Frequency Change with Temperature
(note 8)
T
MIN
≤
T
A
≤
T
MAX
5
%
Peak-to-peak Amplitude At R
T
/C
T
V
OSC
1.7
V
Current Sense Section
Gain (note 9 & 10)
A
VOL
2.85
3.00
3.15
V/V
Maximum Input Signal (note 9)
V
I(MAX)
COMP = 5V
12V
≤
V
CC
≤
25V (note 9)
0.9
1.0
1.1
V
Power Supply Rejection Ratio (note 9)
PSRR
70
dB
μ
A
Input Bias Current
I
BIAS
-3.0
-10
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