RDK-242 Power Integrations, RDK-242 Datasheet - Page 55

• Manufacturer Part Number: RDK-242
• Description: Power Management Modules & Development Tools TOPSwitch-JX REF. DESIGN KIT
• Manufacturer: Power Integrations
• Type: MOSFET & Power Driverr

Specifications of RDK-242

• Input Voltage: 85 VAC to 264 VAC
• Output Voltage: 12 V
• Maximum Operating Temperature: + 40 C
• Minimum Operating Temperature: 0 C
• Operating Supply Voltage: 85 VAC to 264 VAC
• Product: Power Management Modules

01-Mar-10
RDR-242 – 30 W Open Frame Supply using TOP266VG
16 Appendix A: Fast AC Reset
The TOPSwitch-JX family has a simplified fast AC Reset Function which can be
configured on the X pin.
Should a latching OVP condition occur, the circuit below
= -27 A (typ) and reset the latch when
connected to the X pin will force I
to exceed I
X
X(TH)
the AC input is disconnected or falls below a set threshold value.
In the circuit below R1, R2 and C1 sets the time after AC is removed before the latch is
reset. A higher gain BJT Q
is desirable to allow using a higher resistance R1 and lower
R
capacitance C1, and thus minimize the circuit dissipation.
Figure 65 – Fast AC Reset Circuit Implementation for TOPSwitch-JX.
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