Datasheet
VDD
VS
CBC
GND
HV
DRV
CS
1
2
3
4
7
6
5
UCC28710
UCC28714
UCC28715
VDD
VS
NTC
GND
HV
DRV
CS
1
2
3
4
7
6
5
UCC28711
UCC28712
UCC28713
UCC28710, UCC28711
UCC28712, UCC28713
UCC28714, UCC28715
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SLUSB86 –NOVEMBER 2012
SOIC (D) PACKAGE
7 PINS
(TOP VIEW)
PIN FUNCTIONS
UCC28710 UCC28711
NAME UCC28714 UCC28712 I/O DESCRIPTION
UCC28715 UCC28713
Cable compensation is a programming pin for compensation of cable voltage drop.
CBC 3 — I
Cable compensation is programmed with a resistor to GND.
Current sense input connects to a ground-referenced current-sense resistor in series
with the power switch. The resulting voltage is used to monitor and control the peak
CS 5 5 I
primary current. A series resistor can be added to this pin to compensate the peak
switch current levels as the AC-mains input varies.
Drive is an output used to drive the gate of an external high voltage MOSFET
DRV 6 6 O
switching transistor.
The ground pin is both the reference pin for the controller and the low-side return for
the drive output. Special care should be taken to return all AC decoupling capacitors
GND 4 4 —
as close as possible to this pin and avoid any common trace length with analog signal
return paths.
The high-voltage pin connects directly to the rectified bulk voltage and provides
HV 7 7 I
charge to the VDD capacitor for start-up of the power supply.
NTC an interface to an external negative temperature coefficient resistor for remote
NTC — 3 I
temperature sensing. Pulling this pin low shuts down PWM action.
VDD is the bias supply input pin to the controller. A carefully-placed bypass capacitor
VDD 1 1 I
to GND is required on this pin.
Voltage sense is an input used to provide voltage and timing feedback to the
controller. This pin is connected to a voltage divider between an auxiliary winding and
VS 2 2 I
GND. The value of the upper resistor of this divider is used to program the AC-mains
run and stop thresholds and line compensation at the CS pin.
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Product Folder Links: UCC28710, UCC28711 UCC28712, UCC28713 UCC28714, UCC28715