ICE2QS01 Infineon Technologies, ICE2QS01 Datasheet - Page 11

• Manufacturer Part Number: ICE2QS01
• Description: IC PWM CONTROLLER 8DIP
• Manufacturer: Infineon Technologies
• Type: Quasi-resonant PWM Controllerr

Specifications of ICE2QS01

• Package / Case: 8-DIP (0.300", 7.62mm)
• Frequency - Switching: 80kHz
• Current - Startup: 300µA
• Voltage - Supply: 11 V ~ 25 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Through Hole
• Switching Frequency: 80 KHz
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Mode: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: SP000269328

3.5
The IC provides full protection functions. The following
table summarizes these protection functions.
Table 2
During operation, the VCC voltage is continuously
monitored. In case of an under- or an over-voltage, the
IC is reset and the main power switch is then kept off.
After the VCC voltage falls below the threshold
V
is then charged up. Once the voltage exceeds the
threshold V
soft-start.
In case of open control loop or output over load, the
regulation voltage will be pulled up . After a blanking
time of 24ms, the IC enters auto-restart mode. The
blanking time here enables the converter to provide a
high power in case the increase in V
sudden load increase. During off-time of the power
switch, the voltage at the zero-crossing pin is
monitored for output over-voltage detection. If the
voltage is higher than the preset threshold v
IC is latched off after the preset blanking time.
If the voltage at the current sensing pin is higher than
the preset threshold v
switch, the IC is latched off. This is short-winding
protection.
During latch-off protection mode, the power cell is
activated and it keeps the VCC voltage at the level of
V
Version 2.1
VCCUVP
VCCBL.
VCC Overvoltage
VCC Undervoltage
Overload/Open Loop
Output Overvoltage
Short Winding
, the power cell is activated. The VCC capacitor
VCCon
Protection Functions
Protection features
, the IC begins to operate with a new
csSW
during on-time of the power
Auto Restart Mode
Auto Restart Mode
Auto Restart Mode
Latched Off Mode
Latched Off Mode
REG
is due to a
OPOVP
, the
11
Quasi-Resonant PWM Controller
Functional Description
October 2007
ICE2QS01