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US4651SG-S08-R Datasheet(PDF) 2 Page - Unisonic Technologies

Part # US4651SG-S08-R
Description  LOW COST POWER-SAVING MODE PWM CONTROLLER
PDF  9 Pages
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

US4651SG-S08-R Datasheet(HTML) 2 Page - Unisonic Technologies

  US4651SG-S08-R Datasheet HTML 1Page - Unisonic Technologies US4651SG-S08-R Datasheet HTML 2Page - Unisonic Technologies US4651SG-S08-R Datasheet HTML 3Page - Unisonic Technologies US4651SG-S08-R Datasheet HTML 4Page - Unisonic Technologies US4651SG-S08-R Datasheet HTML 5Page - Unisonic Technologies US4651SG-S08-R Datasheet HTML 6Page - Unisonic Technologies US4651SG-S08-R Datasheet HTML 7Page - Unisonic Technologies US4651SG-S08-R Datasheet HTML 8Page - Unisonic Technologies US4651SG-S08-R Datasheet HTML 9Page - Unisonic Technologies  
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US4651S
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
2 of 9
www.unisonic.com.tw
QW-R129-003.B
MARKING
PIN CONFIGURATION
GND
FB
NC
DRAIN
VDD
NC
CS
1
2
3
4
8
7
6
5
NC
PIN DESCRIPTION
PIN NO.
PIN NAME
PIN TYPE
DESCRIPTION
1
VDD
P
Power supply.
2
GND
P
Ground.
3, 5, 7
NC
No Connection
4
CS
I
Current sense input pin. Connected to MOSFET current sensing resistor
node.
6
DRAIN
O
Connected the primary lead of the transformer.
8
FB
I
Feedback input pin. The PWM duty cycle is determined by voltage level
into this pin and CS pin input.
BLOCK DIAGRAM
DRAIN
FB
PWM COMP
OCP
UVLO
Reference voltage
Burstmode
VDD
GND
Latch
S
R
Q
Q
CS
Driver
LEB
Slope Compensation
Constant Power Limit
OTP
Logic
Control
OVP
8
1
6
4
3/5/7
2
Oscillator
Frequency
Hopping
NC
UVLO
M1
M2



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