ICL8001G / ICLS8082G
Design Guidelines
Pin Configuration and Functionality
Application Note
7
Version 2.0, 2011-04-14
2.2
Package PG-DSO-8
Figure 2
Pin Configuration of PG-DSO-8 (top view)
2.3
Pin Functionality
ZCV (Zero Crossing)
The voltage from the auxiliary winding after a time delay circuit is applied at this pin. Internally, the pin is connected
to the zero-crossing detector for switch-on determination. Additionally, the output overvoltage detection is realized
by comparing the voltage
Vzc
with an internal preset threshold.
VR (Voltage Sense)
The rectified input mains voltage is sensed at this pin. The signal is used to set the peak current of the peak-current
control and therefore enable the PFC and phase-cut dimming functionality.
CS (Current Sense)
This pin is connected to the shunt resistor for the primary current sensing, externally, and to the PWM signal
generator for switch-off determination (together with the feedback voltage), internally. Moreover, short-winding
protection is realized by monitoring the voltage
Vcs
during on-time of the main power switch.
GD (Gate Drive Output)
This output signal drives the external main power switch, which is a power MOSFET in most cases.
HV (High Voltage)
The HV pin is connected to the bus voltage, externally, and to the power cell, internally. The current through this
pin precharges the VCC capacitor with a constant current once the supply bus voltage is applied.
VCC (Power supply)
The VCC pin is the positive supply of the IC. The operating range is between
V
VCCoff
and V
VCCOVP
.
GND (Ground)
This is the common ground of the controller.
ZCV
VR
CS
GD
GND
VCC
NC
HV
1
2
3
4
5
6
7
8
