ICE2QS03G Infineon Technologies, ICE2QS03G Datasheet - Page 5

• Manufacturer Part Number: ICE2QS03G
• Description: IC CTRLR PWM QUASI-RESON DSO8
• Manufacturer: Infineon Technologies

Specifications of ICE2QS03G

• Output Isolation: Isolated
• Frequency Range: 52kHz
• Voltage - Input: 11.2 V ~ 27 V
• Operating Temperature: -25°C ~ 130°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1
1.1
1.2
Figure 1
Version 2.1
Pin
1
2
3
4
5
6
7
8
GATE
ZC
CS
FB
Symbol
GATE
GND
VCC
n.c.
CS
HV
ZC
FB
Pin Configuration and
Functionality
Pin Configuration with PG-
DSO-8
Package PG-DSO-8
Pin Configuration PG-DSO-8(top view)
1
2
3
4
Function
Zero Crossing
Feedback
Current Sense
Gate Drive Output
High Voltage Input
Not connected
Controller Supply Voltage
Controller Ground
8
7
6
5
GND
VCC
NC
HV
5
1.3
ZC (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.
FB (Feedback)
Normally, an external capacitor is connected to this pin
for a smooth voltage V
connected to the PWM signal generator for switch-off
determination (together with the current sensing
signal), the digital signal processing for the frequency
reduction
operation, and the Active Burst Mode controller for
entering Active Burst Mode operation determination
and burst ratio control during Active Burst Mode
operation. Additionally, the open-loop / over-load
protection is implemented by monitoring the voltage at
this pin.
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.
GATE (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 V
GND (Ground)
This is the common ground of the controller.
Quasi-Resonant PWM Controller
Pin Configuration and Functionality
Pin Functionality
with
decreasing
VCCoff
and V
FB
. Internally, this pin is
VCCOVP
load
February 5, 2010
ICE2QS03G
.
during
normal