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US1651G-S08-R Fiches technique(PDF) 2 Page - Unisonic Technologies

No de pièce US1651G-S08-R
Description  PRIMARY-SIDE REGULATION PWM POWER SWITCH
PDF  7 Pages
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Fabricant  UTC [Unisonic Technologies]
Site Internet  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

US1651G-S08-R Fiches technique(HTML) 2 Page - Unisonic Technologies

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US1651
Preliminary
CMOS IC
UNISONICTECHNOLOGIESCO.,LTD
2 of 7
www.unisonic.com.tw
QW-R129-005.a
MARKING
PIN CONFIGURATION
1
2
3
4
8
7
6
5
VDDG
VDD
INV
CS
GND
GND
Drain
Drain
PIN DESCRIPTION
PIN NO.
PIN NAME
DESCRIPTION
1
VDDG
Internal gate driver power supply
2
VDD
IC DC power supply input
3
INV
Inverting input of error amplifier (EA). Connected to resistor divider from primary sensing
winding reflecting output voltage. PWM duty cycle is determined by EA output and
current sense signal at pin 4.
4
CS
Current sense input
5, 6
Drain
HV MOSFET Drain Pin. The Drain pin is connected to the primary lead of the transformer
7, 8
GND
Ground
BLOCK DIAGRAM
Regulator &
Vref
Por
OVP
30V
PWM
CC/CV
controller
LEB
Logic
core
0.82V
VDD
INV
GND
CS
Drain
Drive
Softstart
Power
MOSFET
VDDG
3
2
1
5/6
4
7/8
1.25V



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