ICL8001G Datasheet, PDF (5/16 Pages) Infineon Technologies AG – Single-Stage Flyback And PFC Controller For LED Lighting Applications

Single-Stage Flyback and PFC Controller
ICL8001G
Pin Configuration and Functionality
1
Pin Configuration and ^{1.3 Pin Functionality}
Functionality
ZCV (Zero Crossing)
At this pin, the voltage from the auxiliary winding after
a time delay circuit is applied. Internally, this pin is
1.1
Pin Configuration with PG- connected to the zero-crossing detector for switch-on
DSO-8
determination. Additionally, the output overvoltage
detection is realized by comparing the voltage Vzc with
an internal preset threshold.
Pin Symbol Function
1
ZCV Zero Crossing
2
VR Voltage Sense
3
CS Current Sense
4
GD Gate Drive Output
5
HV High Voltage Input
6
n.c. Not connected
7
VCC Controller Supply Voltage
8
GND Controller Ground
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.
1.2
Package PG-DSO-8
ZCV
1
8
VR
2
7
GND
VCC
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.
CS
3
GD
4
VCC (Power supply)
6
NC
VCC pin is the positive supply of the IC. The operating
range is between V_VCCoff and V_VCCOVP.
GND (Ground)
5
HV
This is the common ground of the controller.
Figure 1 Pin Configuration PG-DSO-8(top view)
Version 1.0
5
May 6, 2010