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ML4826CP2 PDF预览

ML4826CP2

更新时间: 2024-02-29 01:11:40
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD 功率因数校正光电二极管输出元件控制器
页数 文件大小 规格书
16页 432K
描述
PFC and Dual Output PWM Controller Combo

ML4826CP2 技术参数

是否Rohs认证: 符合生命周期:Obsolete
零件包装代码:DIP包装说明:DIP, DIP20,.3
针数:20Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.29其他特性:ALSO CONTAINS A SECONDARY PWM OUTPUT ANS ALSO FUNCTIONS IN CURRENT MODE
模拟集成电路 - 其他类型:POWER FACTOR CONTROLLER WITH POST REGULATOR控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:7 V
最小输入电压:JESD-30 代码:R-PDIP-T20
JESD-609代码:e3长度:25.97 mm
功能数量:1端子数量:20
最高工作温度:70 °C最低工作温度:
最大输出电流:0.5 A封装主体材料:PLASTIC/EPOXY
封装代码:DIP封装等效代码:DIP20,.3
封装形状:RECTANGULAR封装形式:IN-LINE
峰值回流温度(摄氏度):NOT APPLICABLE认证状态:Not Qualified
座面最大高度:4.32 mm子类别:Switching Regulator or Controllers
表面贴装:NO切换器配置:BOOST
最大切换频率:250 kHz技术:BIPOLAR
温度等级:COMMERCIAL端子面层:Matte Tin (Sn)
端子形式:THROUGH-HOLE端子节距:2.54 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT APPLICABLE
宽度:7.62 mm

ML4826CP2 数据手册

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www.fairchildsemi.com  
ML4826  
PFC and Dual Output PWM Controller Combo  
Features  
General Description  
• Internally synchronized PFC and PWM in one IC  
• Low total harmonic distortion  
• Low ripple current in the storage capacitor between the  
PFC and PWM sections  
• Average current, continuous boost, leading edge PFC  
• High efficiency trailing edge PWM with dual totem-pole  
outputs  
• Average line voltage compensation with brown-out  
control  
The ML4826 is a high power controller for power factor  
corrected, switched mode power supplies. PFC allows the  
use of smaller, lower cost bulk capacitors, reduces power line  
loading and stress on the switching FETs, and results in a  
power supply that fully complies with IEC1000-3-2 specifi-  
cations. The ML4826 includes circuits for the implementa-  
tion of a leading edge, average current “boost” type power  
factor correction and a trailing edge, pulse width modulator  
(PWM) with dual totem-pole outputs.  
• PFC overvoltage comparator eliminates output “runaway”  
due to load removal  
• Current-fed multiplier for improved noise immunity  
• Overvoltage protection, UVLO, and soft start  
An over-voltage comparator shuts down the PFC section in  
the event of a sudden decrease in load. The PFC section also  
includes peak current limiting and input voltage brown-out  
protection. The PWM section can be operated in current or  
voltage mode at up to 250kHz and includes a duty cycle limit  
to prevent transformer saturation.  
Block Diagram  
20  
11  
1
17  
POWER FACTOR CORRECTOR  
V
CC  
AGND  
IEAO  
VEAO  
VEA  
V
CCZ  
13.5V  
OVP  
+
V
V
REF  
FB  
7.5V  
REFERENCE  
IEA  
18  
15  
3.5kΩ  
19  
-
-
2.7V  
-1V  
-
+
-
2.5V  
AC  
+
+
S
Q
I
2
4
3
+
-
8V  
GAIN  
V
R
S
Q
Q
RMS  
MODULATOR  
PFC OUT  
3.5kΩ  
PFC I  
LIMIT  
I
SENSE  
RAMP 1  
R
Q
8
7
R C  
T
T
OSCILLATOR  
V
CC2  
RAMP 2  
16  
14  
S
Q
DUTY CYCLE  
LIMIT  
9
PWM 2  
8V  
T
Q
-
V
PGND  
1.5V  
DC  
6
5
+
V
S
Q
Q
CC  
V
CC2  
-
V
OK  
1V  
IN  
PWM 1  
PGND  
V
-
50µA  
FB  
SS  
+
-
13  
12  
R
2.5V  
+
+
DC I  
LIMIT  
V
8V  
DC I  
LIMIT  
10  
UVLO  
CCZ  
PULSE WIDTH MODULATOR  
REV. 1.0.5 2/14/02  

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