The TOP242PN is a TOPSwitch-GX Integrated Off-line Switcher IC flyback supply provides 4 outputs, delivering 7W from a 230VAC ±15% input. Resistor R7 programs the internal TOP242PN current limit to 78% of nominal, just above the level needed for full load at low line. This feature allows a more continuous transformer design for better efficiency and cross-regulation, without requiring a larger core size. Resistor R12, C10 and L2 filter conducted EMI; R12 is a flameproof fusible type, also functioning as a fuse. For lower cost, if the supply does not have to meet conducted EMI with the output connected to earth ground, the common mode choke can be replaced with a π filter. A Zener clamp (D11 and VR1) was selected over an RCD clamp to minimize zero load consumption.
Specifications:
IC Case / Package: DIP
Power Rating Max: 15W
Input Voltage Max: 265VAC
Operating Temperature Min: -40°C
Isolation: Isolated
Topology: Flyback
No. of Pins: 8Pins
Power Switch Current Rating: 1.6mA
Input Voltage Min: 85VAC
Switching Frequency: 132kHz
Product Range: TOPSwitch-GX Series
Power Switch Voltage Rating: 700V
IC Mounting: Through Hole
Operating Temperature Max: 150°C
Package Includes:
1 x TOP242PN-POWER INTEGRATIONS-AC/DC Off-Line Switcher IC, TOPSwitch-GX, Flyback, 85 VAC – 265 VAC, 132 kHz, 720 mA out, 15W, DIP-8
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