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UC2843BL-S08-R Datasheet(PDF) 5 Page - Unisonic Technologies

Part # UC2843BL-S08-R
Description  HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
PDF  8 Pages
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC2843BL-S08-R Datasheet(HTML) 5 Page - Unisonic Technologies

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UC2843B
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
5 of 8
www.unisonic.com.tw
QW-R103-048.D
APPLICATION INFORMATION
Error amplifier (EA) configuration circuit:
Z1
Z2
VFB
COMP
0.5mA
2.5V
Error
Amplifier
EA
Note: Error amplifier can source or sink up to 0.5mA.
Current-sense circuit:
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/CT
GND
CT
RT
The frequency is calculated as followed:
f = 1 / RTCT
For RT > 5kΩ:
f = 1.72 / RTCT



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