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參數資料
| 型號： | CS3843BGD14 |
| 廠商： | ZF Electronics Corporation |
| 英文描述： | Off-Line Current Mode PWM Control Circuit Off-Line Current Mode PWM Control Circuit |
| 中文描述： | 離線式電流模式PWM控制電路脫線電流模式PWM控制電路 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 154K |
| 代理商： | CS3843BGD14 |
1
Features
V
CC
Gnd
OSC
V
FB
COMP
Sense
V
REF
V
OUT
Output
Ref5V
InBias
NOR
S
R
PWM
Sense
Comparator
Oscillator
1 V
R
2 R
V
C
AmError
+
–
2.50V
Set/
LUndervoltage
34V
( ) Indicates CS-3843B
16V/10V
(8.4V/7.6V)
V
CC
Pwr
Pwr Gnd
REF
I
Very low Start Up Current
(300μA typ)
Optimized Off-line
Control
Internally Trimmed,
Temperature
Compensated Oscillator
Maximum Duty-cycle
Clamp
V
stabilization before
Output Enable
Pulse-by-pulse Current
Limiting
Improved Undervoltage
Lockout
Double Pulse Suppression
1% Trimmed Bandgap
Reference
High Current Totem Pole
Output
I
I
I
I
I
I
I
I
I
Package Options
C
Off-Line Current Mode PWM Control Circuit
with Very Low Start Up Current
Description
CS3842B/CS3843B
Block Diagram
Absolute Maximum Ratings
Supply Voltage (I
CC
<30mA)..........................................................Self Limiting
Supply Voltage (Low Impedance Source)...................................................30V
Output Current...............................................................................................±1A
Output Energy (Capacitive Load) .................................................................5μJ
Analog Inputs (V
FB
, Sense) ............................................................-0.3V to 5.5V
Error Amp Output Sink Current...............................................................10mA
Lead Temperature Soldering
Wave Solder (through hole styles only)...................10 sec. max, 260°C peak
Reflow (SMD styles only)....................60 sec. max above 183°C, 230°C peak
1
COMP
2
3
4
V
FB
Sense
OSC
V
REF
V
CC
V
OUT
Gnd
8
7
6
5
8 Lead PDIP & SO Narrow
10
7
14
13
12
8
1
2
3
4
5
6
11
9
COMP
NC
V
FB
NC
Sense
NC
OSC
V
REF
NC
V
CC
V
CC
Pwr
V
OUT
Pwr Gnd
Gnd
14L SO Narrow
Rev. 6/23/99
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
A
Company
The CS384XB provides all the neces-
sary features to implement off-line
fixed frequency current-mode control
with a minimum number of external
components. The family has been opti-
mized for very low start up current
(300μA, typ).
The CS384XB family incorporates a
precision temperature-controlled oscil-
lator with an internally trimmed dis-
charge current to minimize variations
in frequency. A precision duty-cycle
clamp eliminates the need for an exter-
nal oscillator when a 50% duty-cycle is
used. Duty-cycles of almost 100% are
possible. On board logic ensures that
VREFis stabilized before the output
stage is enabled. Ion-implant resistors
provide tighter control of undervoltage
lockout.
Other features include pulse-by-pulse
current limiting, and a high-current
totem pole output for driving capaci-
tive loads, such as the gate of a power
MOSFET. The output is LOW in the off
state, consistent with N-channel
devices.
These ICs are available in 8 and 14 lead
surface mount (SO) and 8 lead PDIP
packages.
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相關代理商/技術參數 |
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| CS3843BGD8 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CS3843BGDR14 | 制造商:CHERRY 制造商全稱:CHERRY 功能描述:Off-Line Current Mode PWM Control Circuit Off-Line Current Mode PWM Control Circuit |
| CS3843BGDR8 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CS3843BGN8 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CS3843BN8 | 制造商:ON Semiconductor 功能描述: |
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