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ML4823CS

更新时间： 2024-09-26 22:46:11
品牌 Logo 应用领域
MICRO-LINEAR 开关光电二极管控制器
页数 文件大小 规格书
9页 171K
描述
High Frequency Power Supply Controller

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中文翻译

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ML4823CS 数据手册

 浏览型号ML4823CS的Datasheet PDF文件第2页浏览型号ML4823CS的Datasheet PDF文件第3页浏览型号ML4823CS的Datasheet PDF文件第4页浏览型号ML4823CS的Datasheet PDF文件第5页浏览型号ML4823CS的Datasheet PDF文件第6页浏览型号ML4823CS的Datasheet PDF文件第7页 
May 1997  
ML4823*  
High Frequency Power Supply Controller  
FEATURES  
GENERAL DESCRIPTION  
■ Practical operation at switching frequencies to 1.0MHz  
■ High current (2A peak) totem pole output  
■ Wide bandwidth error amplifier  
The ML4823 High Frequency PWM Controller is an IC  
controller optimized for use in Switch Mode Power  
Supply designs running at frequencies to 1MHz.  
Propagation delays are minimal through the comparators  
and logic for reliable high frequency operation while slew  
rate and bandwidth are maximized on the error amplifier.  
This controller is designed for single-ended applications  
using voltage or current mode and provides for input  
voltage feed forward.  
■ Fully latched logic with double pulse suppression  
■ Pulse-by-pulse current limiting  
■ Soft start and max. duty cycle control  
■ Under voltage lockout with hysteresis  
■ 5.1V trimmed bandgap reference  
A 1V threshold current limit comparator provides cycle-  
by-cycle current limit and exceeding a 1.4V threshold  
initiates a soft-start cycle. The soft start pin doubles as a  
maximum duty cycle clamp. All logic is fully latched to  
provide jitter-free operation and prevent multiple pulsing.  
An under-voltage lockout circuit with 800mV of hysteresis  
assures low startup current and drives the outputs low  
during fault conditions.  
■ Low start-up current (1.1mA)  
■ Pin compatible improved replacement for UC3823  
■ Fast shut down path from current limit to output  
■ Soft start latch ensures full soft start cycle  
■ Outputs pull low for undervoltage lockout  
This controller is an improved second source for the  
UC3823 controller; however, the ML4823 includes  
features not found on the 3823. These features are set in  
italics.  
*Some Packages Are Obsolete  
BLOCK DIAGRAM (Pin Configuration Shown for 16-Pin Version)  
R
T
5
6
CLOCK OUT  
OSC  
4
C
T
R
S
1.25V  
+
RAMP  
7
3
+
Q
COMP  
E/A OUT  
–
NI  
2
1
+
ERROR  
V+  
POWER V  
C
13  
14  
12  
INV  
AMP  
–
OUTPUT  
SOFT START  
POWER GND  
8
–
4V  
–
+
I
I
REF  
LIM  
LIM  
+
11  
9
1V  
–
+
/S.D.  
ENABLE  
REF  
V
5.1V V  
REF  
5.1V  
16  
R
V
GEN  
REF  
Q
INTERNAL  
BIAS  
9V  
V
CC  
+
–
–
+
15  
10  
S
1.4V  
UNDER  
VOLTAGE  
LOCKOUT  
SIGNAL GND  
1
1234567...9

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