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參數(shù)資料
| 型號： | CM3842CP |
| 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)： | 6/12頁 |
| 文件大?。?/td> | 638K |
| 代理商： | CM3842CP |
CM3842/3843
C
URRENT
M
ODE
PWM C
ONTROLLER
2001/06/27
Advanced
Champion Microelectronic Corporation
Page 5
ELECTRICAL CHARACTERISTICS (Continued)
Error Amplifier Section
Input Bias Current
I
BIAS
-0.1
-2
μ
A
V
Input Voltage
V
I(EA)
COMP = 2.5V
2V
≤
V
O
≤
4V
T
J
= 25
12V
≤
V
CC
≤
25V
V
FB
= 2.7V, COMP = 1.1V
2.42
2.50
2.58
Open Loop Voltage Gain
G
VO
65
90
dB
Unity Gain Bandwidth (note 8)
UGBW
O
C
0.7
1
MHz
Power Supply Rejection Ratio
PSRR
60
70
dB
Output Sink Current
I
SINK
2
7
mA
Output Source Current
I
SOURCE
V
FB
= 2.3V, COMP = 5.0V
V
FB
= 2.3V, R
L
= 15K
to GND
V
FB
= 2.7V, RL = 15K
to V
REF
-0.5
-1.0
mA
High Output Voltage
V
OH
5
6
V
Low Output Voltage
V
OL
0.7
1.1
V
Output Section
I
SINK
= 20mA
0.1
0.4
Output Low Level
V
OL
I
SINK
= 200mA
1.4
2.2
V
I
SOURCE
= 20mA
13
13.5
Output High Level
V
OH
I
SOURCE
= 200mA
12
13.0
V
Rise Time (note 8)
t
r
T
J
= 25
O
C, C
L
= 1nF
50
150
ns
Fall Time (note 8)
t
f
T
J
= 25
O
C, C
L
= 1nF
50
150
ns
Under-Voltage Lockout Section
CM3842
14.5
16.0
17.5
Start Threshold
V
TH(ST)
CM3843
7.8
8.4
9.0
V
CM3842
8.5
10
11.5
Min. Operating Voltage
CM3843
7.0
7.6
8.2
V
PWM Section
CM3842/43
94
97
100
Maximum Duty Cycle
%
Minimum Duty Cycle
0
%
Total Standby Current
CM3842
0.2
0.35
Startup Current
CM3843
0.5
1.0
mA
Operating Supply Current
I
CC
V
FB
= I
SENSE
= 0V
14
17
mA
Zener Voltage
V
Z
I
CC
= 25mA
30
35
V
note 7:
Adjust V
CC
above the start threshold before setting at 15V
note 8:
These parameters, although guaranteed, are not 100% tested in production prior to shipment
note 9:
Parameters are measured at trip point of latch with V
FB
= 2V
note 10: Gain is measured between I
SENSE
and COMP with the input changing from 0V to 0.8V
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