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ML4823IQ

更新时间： 2024-09-26 22:14:15
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD 开关控制器
页数 文件大小 规格书
9页 123K
描述
High Frequency Power Supply Controller

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中文翻译

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ML4823IQ 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：QLCC包装说明：PLASTIC, LCC-20
针数：20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.75其他特性：ALSO OPERATES IN CURRENT MODE
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：30 V
最小输入电压：8.9 V标称输入电压：15 V
JESD-30 代码：S-PQCC-J20JESD-609代码：e0
长度：8.965 mm功能数量：1
端子数量：20最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：2 A
封装主体材料：PLASTIC/EPOXY封装代码：QCCJ
封装等效代码：LDCC20,.4SQ封装形状：SQUARE
封装形式：CHIP CARRIER认证状态：Not Qualified
座面最大高度：4.57 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：SINGLE
最大切换频率：1000 kHz技术：BIPOLAR
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：J BEND端子节距：1.27 mm
端子位置：QUAD宽度：8.965 mm
Base Number Matches：1

ML4823IQ 数据手册

 浏览型号ML4823IQ的Datasheet PDF文件第2页浏览型号ML4823IQ的Datasheet PDF文件第3页浏览型号ML4823IQ的Datasheet PDF文件第4页浏览型号ML4823IQ的Datasheet PDF文件第5页浏览型号ML4823IQ的Datasheet PDF文件第6页浏览型号ML4823IQ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.  
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  
AMP  
V+  
POWER V  
C
13  
14  
12  
INV  
–
OUTPUT  
SOFT START  
POWER GND  
8
–
+
4V  
–
+
I
I
REF  
LIM  
11  
9
1V  
–
+
/S.D.  
LIM  
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  
REV. 1.0 10/12/2000  
1234567...9

中文翻译

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