Single-Stage Flyback And
PFC Controller For LED
Lighting Applications

Single-Stage Flyback and PFC Controller
ICL8001G
Pin Configuration and Functionality
Version 1.0 5 May 6, 2010
1Pin Configuration and Functionality
1.1Pin Configuration with PG-DSO-8
1.2Package PG-DSO-8
Figure 1Pin Configuration PG-DSO-8(* view)
1.*in Functionality
ZCV (Zero Crossing)
At this pin, the voltage from the auxiliary winding after a time delay circuit is applied. Internally, this 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 allow for 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 the PWM signal generator for switch-off determination (together with the feedback voltage), internally. Moreover, short-winding protection is realised 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 case.
HV (High Voltage)
The pin HV is connected to the bus voltage, externally,
and to the power cell, internally. The current through this pin pre-charges the VCC capacitor with constant current once the supply bus voltage is applied.
VCC (Power supply)
VCC pin is the positive supply of the IC. The operating range is between VVCCoff and VVCCOVP.
GND (Ground)
This is the common ground of the controller.

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