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參數(shù)資料
| 型號： | UC1844AAY |
| 廠商： | Microsemi Corporation |
| 英文描述： | Modular Connector; No. of Contacts:4; Color:Ivory; Contact Termination:Quick Connect RoHS Compliant: Yes |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 530K |
| 代理商： | UC1844AAY |
UC1842A/3A/4A/5A
UC2842A/3A/4A/5A
UC3842A/3A/4A/5A
SLUS224A - SEPTEMBER 1994 - REVISED APRIL 2002
Optimized for Off-line and DC to DC
Converters
Low Start Up Current (<0.5mA)
Trimmed Oscillator Discharge Current
Automatic Feed Forward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Under-Voltage Lockout With Hysteresis
Double Pulse Suppression
High Current Totem Pole Output
Internally Trimmed Bandgap Reference
500kHz Operation
Low R
O
Error Amp
Current Mode PWM Controller
The UC1842A/3A/4A/5A family of control ICs is a pin for pin compati-
ble improved version of the UC3842/3/4/5 family. Providing the nec-
essary features to control current mode switched mode power
supplies, this family has the following improved features. Start up cur-
rent is guaranteed to be less than 0.5mA. Oscillator discharge is
trimmed to 8.3mA. During under voltage lockout, the output stage
can sink at least 10mA at less than 1.2V for V
CC
over 5V.
The difference between members of this family are shown in the table
below.
BLOCK DIAGRAM
FEATURES
DESCRIPTION
application
INFO
available
Part #
UVLO On
UVLO Off
Maximum Duty
Cycle
<100%
<100%
<50%
<50%
UC1842A
UC1843A
UC1844A
UC1845A
16.0V
8.5V
16.0V
8.5V
10.0V
7.9V
10.0V
7.9V
Note 1:
Note 2: Toggle flip flop used only in 1844A and 1845A.
A = DIL-8 Pin Number. B = SO-14 Pin Number.
A/B
相關PDF資料 |
PDF描述 |
|---|---|
| UC1845AAY | CURRENT MODE PWM CONTROLLER |
| UC1842AAY | CURRENT MODE PWM CONTROLLER |
| UC1843AAY | CURRENT MODE PWM CONTROLLER |
| UC184XA | CURRENT MODE PWM CONTROLLER |
| UC2870DW-1 | Power management system IC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UC1844A-EP | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT-MODE PWM CONTROLLER |
| UC1844AJ | 制造商:Texas Instruments 功能描述:Current Mode PWM Controller 1A 8-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:CUR MODE PWM CONT - Bulk |
| UC1844AJ/90027 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| UC1844AJ/90144 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| UC1844AJ883B | 制造商:Texas Instruments 功能描述:Current Mode PWM Controller 1A 8-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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