UCC28510 Datasheet_PDF文件下载_芯片资料查询

UCC28510, UCC28511, UCC28512, UCC28513,

UCC28514, UCC28515, UCC28516, UCC28517

SLUS517B 鈭?DECEMBER 2002 鈭?REVISED AUGUST 2004

ADVANCED PFC/PWM

COMBINATION CONTROLLERS

FEATURES

D

Provides Control of PFC and PWM Power

D

Stages In One Device

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

DESCRIPTION

The UCC28510 series of combination PFC/PWM

controllers provide complete control functionality

for any off-line power system requiring

compliance with the IEC1000鈭?鈭? 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.

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.

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.

PFC Features

鈭?Average-Current-Mode Control for

Continuous Conduction Mode Operation

鈭?Highly-Linear Multiplier for Near-Unity

Power Factor

鈭?Input Voltage Feedforward Implementation

鈭?Improved Load Transient Response

鈭?Accurate Power Limiting

鈭?Zero Power Detect

PWM Features

鈭?/div>

Peak-Current-Mode Control Operation

1:1 or 1:2 PFC:PWM Frequency Options

Programmable maximum duty cycle

Programmable Soft-Start

Two Hysteresis Options for Differing

Hold-Up Time Requirements

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

铮?/div>

2004, Texas Instruments Incorporated

www.ti.com

1

UCC28511,UCC28512,UCC28513,UCC28514,UCC28515,UCC28517

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