UC3842D Просмотр технического описания (PDF) - Fairchild Semiconductor

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производитель

UC3842D

SMPS Controller

Fairchild Semiconductor 

UC3842/UC3843/UC3844/UC3845

UC3842/44 UC3843/45

Figure 2. Under Voltage Lockout

During Under-Voltage Lock-Out, the output driver is biased to a high impedance state. Pin 6 should be shunted to ground with

a bleeder resistor to prevent activating the power switch with output leakage current.

Figure 3. Error Amp Configuration

Figure 4. Current Sense Circuit

Peak current (IS) is determined by the formula:

IS(MAX)=

1----.--0---V---

RS

A small RC filter may be required to suppress switch transients.

5

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