EVALSF2-ICE2B765P Infineon Technologies, EVALSF2-ICE2B765P Datasheet - Page 8

• Manufacturer Part Number: EVALSF2-ICE2B765P
• Description: BOARD DEMO ICE2B765P 80W SMPS
• Manufacturer: Infineon Technologies
• Series: CoolSET®F2r

Specifications of EVALSF2-ICE2B765P

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 80W
• Voltage - Output: 24V
• Current - Output: 3.3A
• Voltage - Input: 85 ~ 270VAC
• Regulator Topology: Flyback
• Frequency - Switching: 67kHz
• Board Type: Fully Populated
• Utilized Ic / Part: ICE2B765
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: EVALSF2-ICE2B765PIN

80W 24V Adapter with ICE2B765P on Board
Output Voltage
Power is coupled out on the secondary side via a fast-acting diodes D1 and D9 with low forward
voltage. Capacitors C5 and C29 performs energy buffering, a following LC - filter C32 and inductor L9
considerably reduces the output voltage ripple. Storage output capacitors C5 and C29 is designed to
exhibit a very low ESR in order to minimize the output voltage ripple caused by the triangular current
characteristic. The output voltage is set with resistors R1 and R2.
Regulation
The output voltage is controlled using a type TL431 reference diode. This device incorporates the
voltage reference as well as the error amplifier and a driver stage. Compensation network C1, C2, R1,
R5 constitutes the external circuitry of the error amplifier of IC2. This circuitry allows the feedback to
be precisely matched to dynamically varying load conditions, thereby providing stable control. The
maximum current through the optocoupler diode and the voltage reference is set by using resistors
R3, R4. Optocoupler IC1 is used for floating transmission of the control signal to the “Feedback” input
via resistor R9 and capacitor C6 of the ICE2B765P control device. The optocoupler used meets DIN
VDE 884 requirements for a wider creepage distance.
EMI Behavior
In order to reduce the conducted EMI behavior, capacitor C7 is set in parallel to the transformer TR1.
Note:
The value should not exceeds 2.2nF in order to guarantee a safety off line switch mode power supply
design.
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EVALSF2-ICE2B765P
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