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UC3842GP-S08-R Datasheet(PDF) 6 Page - Unisonic Technologies

Part # UC3842GP-S08-R
Description  HIGH PERFORMANCE CURRENT MODE CONTROLLER
PDF  7 Pages
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3842GP-S08-R Datasheet(HTML) 6 Page - Unisonic Technologies

  UC3842GP-S08-R Datasheet HTML 1Page - Unisonic Technologies UC3842GP-S08-R Datasheet HTML 2Page - Unisonic Technologies UC3842GP-S08-R Datasheet HTML 3Page - Unisonic Technologies UC3842GP-S08-R Datasheet HTML 4Page - Unisonic Technologies UC3842GP-S08-R Datasheet HTML 5Page - Unisonic Technologies UC3842GP-S08-R Datasheet HTML 6Page - Unisonic Technologies UC3842GP-S08-R Datasheet HTML 7Page - Unisonic Technologies  
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UC3842G
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
6 of 7
www.unisonic.com.tw
QW-R103-036.D
CURRENT SENSE CIRCUIT
5
3
1
2R
R1V
C
Rs
R
Is
Error Amplifier
Current Sense Comparator
Peak current (IS) determined by the formula: ISMAX=1V/Rs. A small RC filter be required to suppress switch
transients.
OSCILLATOR AND STANDBY MODE
We can judge the state of output load through the voltage of Pin 1. In order to reduce the standby power, it will
reduce the OSC frequency at right load. When VCOMP≤2.2V, the OSC frequency begins to reduce. The normal
frequency is 52KHz, the minimum frequency is 22KHz.
2.2V
1.2V
Standby mode
Minimum frequency :14KHz
Normal
Frequency: 52KHz
Normal
Frequency: 52KHz
VCOMP
Increase
OSC triangle wave



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