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參數(shù)資料
| 型號： | LM3101 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Secondary-Side PWM Controller |
| 中文描述： | 二次側(cè)PWM控制器 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 319K |
| 代理商： | LM3101 |
TL/H/11436
L
January 1995
LM3101 Secondary-Side PWM Controller
General Description
The LM3101 is a precision high-speed PWM controller. It is
designed to provide secondary-side feedback for offline
Switch-Mode Power Supplies (SMPS) using pulse communi-
cation to the primary-side driver. The LM3101 is applicable
in all of the popular converter topologies such as flyback or
forward.
The LM3101 combined with its companion LM3001 Primary-
Side Driver forms a regulator chip-set that provides preci-
sion control of offline or other isolated DC/DC converters.
The communication is realized between the two chips by a
small pulse transformer, with one or two turns on its primary
and secondary. This type of communication does not intro-
duce any poles or zeroes in the control loop and yields the
fastest possible loop response for the isolated switching
regulator.
The secondary-side controller contains a precision 1.242V
reference, an error amplifier, and a trimmed oscillator which
is programmed with a single resistor. The LM3101 can real-
ize voltage, current or charge mode control. Power supply
monitor features include power-on reset with programmable
delay and overvoltage protection.
Features
Y
g
2% precision voltage reference
Y
Wide-bandwidth (8 MHz) error amplifier
Y
External synchronization
Y
Frequency shift during an output short circuit
Y
Power-on reset flag with programmable delay
Y
Overvoltage crowbar trigger circuit
Y
Ramped reference Soft-Start
Y
Operation beyond 1 MHz
Y
Voltage, current, or charge mode control
Typical Applications
Y
Isolated offline switching power supplies
Y
Isolated DC/DC power converters
Y
Flyback regulator
Y
Forward converter
Block Diagram
TL/H/11436–1
C
1995 National Semiconductor Corporation
RRD-B30M75/Printed in U. S. A.
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相關代理商/技術(shù)參數(shù) |
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|---|---|
| LM3101M | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Secondary-Side PWM Controller |
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