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UCC38510 PDF预览

UCC38510

更新时间: 2024-09-19 23:39:03
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其他 - ETC 功率因数校正控制器
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34页 533K
描述
Advanced PFC/PWM Combination Controllers

UCC38510 数据手册

 浏览型号UCC38510的Datasheet PDF文件第2页浏览型号UCC38510的Datasheet PDF文件第3页浏览型号UCC38510的Datasheet PDF文件第4页浏览型号UCC38510的Datasheet PDF文件第5页浏览型号UCC38510的Datasheet PDF文件第6页浏览型号UCC38510的Datasheet PDF文件第7页 
ꢀꢁꢁ ꢂ ꢃꢄ ꢅ ꢆ ꢇ ꢀꢁꢁ ꢂ ꢃꢄ ꢅꢅ ꢇ ꢀꢁꢁ ꢂ ꢃꢄ ꢅ ꢂ ꢇ ꢀꢁ ꢁꢂ ꢃꢄ ꢅꢈ ꢇ  
SLUS517− DECEMBER 2002  
FEATURES  
DESCRIPTION  
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Provides Control of PFC and PWM Power  
Stages In One Device  
The UCC28510 series of combination PFC/PWM  
controllers provide complete control functionality  
for any off-line power system requiring  
compliance with the IEC1000−3−2 harmonic  
reduction requirements. By combining the control  
and drive signals for the PFC and the PWM stages  
into a single device, significant performance and  
cost benefits are gained. By managing the  
modulation mechanisms of the two stages  
(leading-edge modulation for PFC and  
trailing-edge modulation for PWM), the ripple  
current in the boost capacitor is minimized.  
Leading-Edge PFC, Trailing-Edge PWM  
Modulation for Reduced Ripple  
Built-In Sequencing of PFC and PWM  
Turn-On  
2-A Source and 3-A Sink Gate Drive for Both  
PFC and PWM Stages  
Typical 16-ns Rise Time and 7-ns Fall Time  
into 1-nF Loads  
PFC Features  
− Average-Current-Mode Control for  
Continuous Conduction Mode Operation  
− Highly-Linear Multiplier for Near-Unity  
Power Factor  
− Input Voltage Feedforward Implementation  
− Improved Load Transient Response  
− Accurate Power Limiting  
Based on the average current mode control  
architecture with input voltage feedforward of prior  
PFC/PWM combination controllers, these devices  
offer performance advantages. Two new key  
PWM features are programmable maximum duty  
cycle and the 2x PWM frequency options to the  
base PFC frequency. For the PFC stage, the  
devices feature an improved multiplier and the  
use of a transconductance amplifier for enhanced  
transient response.  
− Zero Power Detect  
PWM Features  
− Peak-Current-Mode Control Operation  
− 1:1 or 1:2 PFC:PWM Frequency Options  
− Programmable maximum duty cycle  
− Programmable Soft-Start  
The core of the PFC section is in a three-input  
multiplier that generates the reference signal for  
the line current. The UCC28510 series features a  
highly linearized multiplier circuit capable of  
producing a low distortion reference for the line  
current over the full range of line and load  
conditions. A low-offset, high-bandwidth current  
error amplifier ensures that the actual inductor  
current (sensed through a resistor in the return  
path) follows the multiplier output command  
signal. The output voltage error is processed  
through a transconductance voltage amplifier.  
− Two Hysteresis Options for Differing  
Hold-Up Time Requirements  
AVAILABLE OPTIONS  
PFC UVLO  
PFC:PWM  
FREQUENCY RATIO  
PWM  
TURN−ON  
HYSTERESIS  
THRESHOLD  
(V)  
1:1  
1:2  
(V)  
16  
UCC28510  
UCC28511  
UCC28512  
UCC28513  
UCC28514  
UCC28515  
UCC28516  
UCC28517  
1.45  
10.2  
16  
3.20  
10.2  
ꢙꢨ  
Copyright 2002, Texas Instruments Incorporated  
ꢤ ꢨ ꢥ ꢤꢝ ꢞꢲ ꢠꢟ ꢣ ꢫꢫ ꢩꢣ ꢡ ꢣ ꢢ ꢨ ꢤ ꢨ ꢡ ꢥ ꢭ  
1
www.ti.com  

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