EVALSF2-ICE2A0565Z-12 Infineon Technologies, EVALSF2-ICE2A0565Z-12 Datasheet - Page 15

• Manufacturer Part Number: EVALSF2-ICE2A0565Z-12
• Description: BOARD DEMO ICE2A0565Z 10W SMPS
• Manufacturer: Infineon Technologies
• Series: CoolSET®F2r

Specifications of EVALSF2-ICE2A0565Z-12

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 10W
• Voltage - Output: 5V
• Current - Output: 2A
• Voltage - Input: 85 ~ 270VAC
• Regulator Topology: Flyback
• Frequency - Switching: 100kHz
• Board Type: Fully Populated
• Utilized Ic / Part: ICE2A0565
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: EVALSF2-ICE2A0565Z-12IN

Input Capacitor Improvement – Slope Compensation
Input Capacitor Improvement
In case you are using a smaller input capacitor (22µF instead of 47µF), the maximum duty cycle
increases. To make sure, that the board is not working in the continuous conduction mode, a different
transformer is necessary; otherwise, you have to assemble slope compensation on board.
Slope Compensation
Any kind of current mode controller needs to have slope compensation in case the application is
designed for the continuous conduction mode (CCM) and the maximum duty cycle exceeds the 50%
threshold. Below you see the impact on the system in case of an input capacitor reduction; with the
47µF bulk works the board in the discontinuous conduction mode (DCM) and a D max < 50%; with the
smaller 22µF bulk, the board is running in the continuous conduction mode (CCM) and D max > 50%.
Channel 1: Drain Current (I
Channel 4: Drain Source Voltage (V
C IN = 47µF / Dmax = 43% / Pout = 12W / V ACIN = 85V
Figure 19 DCM – Operation with Dmax < 50%
To prevents an instability of the regulation loop, in case of CCM and D max > 50%, assemble just three
more components (2 ceramic capacitors C17 / C18 and one resistor R19) as shown in the circuit
diagram below.
Figure 21 Circuit Diagram Switch Mode Power Supply with Slope Compensation
More information regarding how to calculate the additional components, see in the application note
AN_SMPS_ICE2xXXX – available on the internet:
www.Infineon.com/CoolSET
D
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DS
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10W 5V Demoboard using ICE2A0565Z on Board
Page 14 of 16
www.infineon.com/CoolSET
Channel 1: Drain Current (I
Channel 4: Drain Source Voltage (V
C IN = 22µF / Dmax = 72% / Pout = 12W / V ACIN = 85V
Figure 20 CCM – Operation with Dmax > 50%
D
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EVALSF2-ICE2A0565Z
CoolSET F2.
DS
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V2.00