The wSl57 and WSl06

Published:2011/7/12 1:59:00 Author:TaoXi | From:SeekIC

The appearances and the pin arrangements of the wSl57 and WSl06 are as shown in figure (a) and (b). Both of them belong to the surface installation component (SMC), they have different package types and pin numbers. In fact the WSl57 only has three pins, it belongs to the three-port component. D is the drain electrode of the MOSFET, the C is the control port, the S is the source electrode. The WSl06 uses the SMD-8 package, it has six S poles, the rest of the poles are the D pole and C pole, so it is still the three-port component. The wSl57 and WSl06 have the same internal circuit. The internal block diagram of the WSl57 is as shown in the figure, it is composed of the l00kHz oscillator, the reference voltage source, the PWM comparator, the control circuit, the driver stage, the power switch tube and the undervoltage, overcurrent and thermal protection circuits.



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