ICE2QR2280G-1(2015) 데이터 시트보기 (PDF) - Infineon Technologies

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ICE2QR2280G-1
(Rev.:2015)

20 W 5 V SMPS Evaluation Board with Quasi - Resonant CoolSET™ ICE2QR2280G-1

Infineon Technologies 

20 W 5 V SMPS Evaluation Board with

Quasi-Resonant CoolSET™ ICE2QR2280G-1

Protection features

7.4

Adjustable output overvoltage protection

During off-time of the power switch, the voltage at the zero-crossing pin ZC is monitored for output

overvoltage detection. If the voltage is higher than the preset threshold 3.7 V for a preset period 100 μs, the

IC is latched off.

7.5

Short winding protection

The source current of the MOSFET is sensed via two shunt resistors R4 and R4A in parallel. If the voltage at

the current sensing pin is higher than the preset threshold VCSSW of 1.68 V during the on-time of the power

switch, the IC is latched off. This constitutes a short winding protection. To avoid an accidental latch off, a

spike blanking time of 190 ns is integrated in the output of internal comparator.

7.6

Auto restart for over temperature protection

The IC has a built-in over temperature protection function. When the controller’s temperature reaches

140 °C, the IC will shut down switch and enters into autorestart. This can protect power MOSFET from

overheated.

Application Note

7

Revision 1.1, 2015-04-02

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