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參數(shù)資料
| 型號(hào)： | CS2844LDW16 |
| 廠(chǎng)商： | ZF Electronics Corporation |
| 英文描述： | Current Mode PWM Control Circuit with 50% Max Duty Cycle |
| 中文描述： | 電流模式PWM控制電路的最大占空比為50％ |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大小： | 156K |
| 代理商： | CS2844LDW16 |
3
C
CS2844/CS2845
MIN
TYP
CS3844/CS3845
MIN
TYP
PARAMETER
TEST CONDITIONS
MAX
MAX UNITS
CS2844 CS3844
TYP
MAX
CS2845/CS3845
MIN
TYP
PARAMETER
TEST CONDITIONS
MIN
MIN
TYP
MAX
MAX UNITS
Notes:
1. Adjust V
cc
above the start threshold before setting at 15V.
2.These parameters, although guaranteed, are not 100% tested in production.
3. Parameter measured at trip point of latch with V
FB
=0.
4. Gain defined as:
A =
; 0
≤
V
Sense
≤
0.8V.
V
COMP
V
Sense
I
Under-Voltage Lockout Section
Start Threshold
Min. Operating After Turn On
Voltage
15
9
16
10
17
11
14.5
8.5
16
10
17.5
11.5
7.8
7.0
8.4
7.6
9.0
8.2
V
V
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
I
Total Standby Current
Start-Up Current
Operating Supply Current
V
CC
Zener Voltage
0.5
11
34
1.0
17
0.5
11
34
1.0
17
mA
mA
V
V
FB
=V
Sense
=0V R
T
=10k
, C
T
=3.3nF
I
CC
=25mA
I
PWM Section
Maximum Duty Cycle
Minimum Duty Cycle
46
48
50
0
46
48
50
0
%
%
8L
14L
16L
PDIP/SO
SO Narrow
SO Wide
1
1
3
COMP
Error amp output, used to compensate error amplifier.
2
3
4
V
FB
Error amp inverting input.
3
5
5
Sense
Noninverting input to Current Sense Comparator.
4
7
6
OSC
Oscillator timing network with Capacitor to Ground, resis-
tor to V
REF
.
5
9
11
Gnd
Ground.
8
10
Pwr Gnd
Output driver Ground.
6
10
12
V
OUT
Output drive pin.
11
13
V
CC
Pwr
Output driver positive supply.
7
12
14
V
CC
Positive power supply.
8
14
15
V
REF
Output of 5V internal reference.
2,4,6,13
1,2,7,8,9,16
NC
No Connection.
Electrical Characteristics: -25
≤
T
A
≤
85
C for CS2844/2845, 0
≤
T
A
≤
70
C for CS3844/3845. V
CC
=15V (Note 1); R
T
=10k
,
C
T
=3.3nF for sawtooth mode., unless otherwise stated.
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| CS2845LDWR16 | Current Mode PWM Control Circuit with 50% Max Duty Cycle |
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