EVALPFC2-ICE2PCS01 Infineon Technologies, EVALPFC2-ICE2PCS01 Datasheet - Page 7

• Manufacturer Part Number: EVALPFC2-ICE2PCS01
• Description: BOARD DEMO 300/500W CCM-PFC SMPS
• Manufacturer: Infineon Technologies

Specifications of EVALPFC2-ICE2PCS01

• Main Purpose: Power Management, Power Factor Correction
• Embedded: No
• Utilized Ic / Part: ICE2PS01
• Primary Attributes: 300W, 393V & 750mA Out, 85~265VAC In
• Secondary Attributes: Boost Converter, Continuous Conduction Mode
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: EVALPFC2-ICE2PCS01IN

75% of rating. Because the peak current limit is not activated, the boost diode is not stressed with
large diode duty cycle under high current.
Enhanced Dynamic Response
Due to inherent low bandwidth of PFC dynamic, in case of load jump, regulation circuit can not
response fast enough and it will lead to large output voltage overshoot or drop. To solve this problem
in PFC application, enhance dynamic response is implemented in the IC. Whenever output voltage
exceeds by ±5%, it will bypass the slow compensation operating amplifier and act on the nonlinear
gain block to affect the duty cycle directly. The output voltage can be recovered in a short time.
Protection Features
a. Open loop protection (OLP) / Mains under voltage protection
The open loop protection is available for this IC to safe-guard the output. Whenever V
voltage
SENSE
falls below 0.6V, or equivalently V
falls below 20% of its rated value, it indicates an open loop
OUT
condition (i.e. VSENSE pin not connected). In this case, most of the blocks within the IC will be
shutdown. It is implemented using a comparator with a threshold of 0.6V. Insufficient input voltage V
IN
will also trigger this protection.
b. Output over-voltage protection
Output over-voltage protection is also available by the same integrated blocks of enhanced dynamic
response. Whenever V
exceeds the rated value by 5%, the over-voltage protection OVP is active.
OUT
This is implemented by sensing the voltage at pin V
with respect to a reference voltage of 3.15V.
SENSE
A V
voltage higher than 3.15V will immediately reduce the output duty cycle even down to zero,
SENSE
bypassing the normal voltage loop control. This results in a lower input power and the output voltage
V
is reduced.
OUT
c. Soft over current control (SOC) and peak current limit
When the amplitude of current sense voltage reaches 0.68V, Soft Over Current Control (SOC) is
activated. This is a soft control does not directly switch off the gate drive but acts on the internal
blocks to result in a reduced PWM duty cycle.
The IC also provides a cycle by cycle peak current limitation (PCL). It is active when the voltage at
current sense voltage reaches -1.04V. The gate output is immediately off after 300ns blanking time.
d. IC supply under voltage lock out
When VCC voltage is below the under voltage lockout threshold VCCUVLO, typical 11V, IC is off the
gate drive is internally pull low to maintain the off state. The current consumption is down to 200uA
only.
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