UC2843BG-S08-R 查看數據表（PDF） - Unisonic Technologies

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UC2843BG-S08-R

HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS

Unisonic Technologies 

UC2843B

 APPLICATION INFORMATION

Error amplifier (EA) configuration circuit:

LINEAR INTEGRATED CIRCUIT

2.5V

0.5mA

VFB

Z1

COMP

Z2

EA

Error

Amplifier

Note: Error amplifier can source or sink up to 0.5mA.

Current-sense circuit:

IS

(see Note A)

EA

Rf

RS

COMP

ISENSE

Cf

GND

2R

PWM

R

1V

Notes: 1. Peak current (IS) is determined by the formula: IS(max) = 1V/RS

2. A small RC filter formed by resistor RF and capacitor CF may be required to suppress switch transients.

The oscillator frequency is set using the circuit:

VREF

RT

RT/CT

CT

GND

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

6 of 9

QW-R103-048.E

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