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US4651SG-S08-R Fiches technique(PDF) 2 Page - Unisonic Technologies

No de pièce US4651SG-S08-R
Description  LOW COST POWER-SAVING MODE PWM CONTROLLER
PDF  9 Pages
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Fabricant  UTC [Unisonic Technologies]
Site Internet  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

US4651SG-S08-R Fiches technique(HTML) 2 Page - 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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