SNVS856B – JUNE 2012 – REVISED MAY 2013
VCC
AGND
ZCD
COMP
1
2
3
4
8
7
6
5
GATE
ISNS
PGND
DLY
Figure 1. 8-Pin SOIC (Top View)
See D Package
PIN DESCRIPTIONS
Pin
1
2
3
4
5
6
7
8
Name
VCC
AGND
ZCD
COMP
DLY
PGND
ISNS
GATE
Description
Power supply Input
Small signal Ground
Zero crossing detection input
Compensation network
Delay control input
Power Ground
Gate driver output
Application Information
This pin provides power to the internal control , connect a 10μF~20μF capacitor
to ground for filtering.
Control signal ground return.
The pin senses the voltage of the auxiliary winding for zero current detection.
Output of the error amplifier. Connect a capacitor from this pin to ground to
determine the frequency response of average current control loop.
Connect a resistor from this pin to ground to set the delay between switching
ON and OFF periods.
Gate driver ground return.
The output provides the gate driver of the power switching MOSFET.
Current sense voltage feedback Switching MOSFET current sense pin.
2
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