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UC3863AL-S08-R Datasheet(PDF) 3 Page - Unisonic Technologies

Part # UC3863AL-S08-R
Description  LOW COST POWER-SAVING MODE PWM CONTROLLER
PDF  10 Pages
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3863AL-S08-R Datasheet(HTML) 3 Page - Unisonic Technologies

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UC3863A
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
3 of 10
www.unisonic.com.tw
QW-R103-148.B
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO.
SOT-26
SOP-8
HSOP-8
PIN NAME
PIN TYPE
DESCRIPTION
1
8
GND
P
Ground
2
7
FB
I
Feedback input pin. The PWM duty cycle is determined by
voltage level into this pin and SENSE pin input
3
5
RI
I
A resistor connected between RI and GND sets switching
frequency. A 100kΩ resistor RI results in a 65KHz switching
frequency
4
4
SENSE
I
Current sense input pin. Connected to MOSFET current
sensing resistor node
5
2
VDD
P
Power supply.
6
1
GATE
O
The totem-pole output driver for driving the power MOSFET
-
3, 6
NC
-
No Connection
BLOCK DIAGRAM
GATE
FB
PWM COMP
OCP
UVLO
Reference voltage
Burstmode
Oscillator
VDD
GND
Latch
S
R
Q
Q
SENSE
Driver
LEB
Frequency
Hopping
Slope Compensation
Constant Power Limit
OTP
Logic
Control
OVP
1/8
2/7
5/2
6/1
4/4
3/5
RI



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