MM1529

MITSUMI Secondary Control for Energy-saving AC Adaptors MM1529 Secondary Control for Energy-saving AC Adaptors Monolithic IC MM1529 Outline This IC is a secondary control IC for AC adaptors with energy-saving mode, and switches to energy-saving mode when there is no load current flowing to reduce AC adaptor power consumption. When normal mode load current flows, it switches automatically to normal mode and supplies power in response to the load. To control the primary oscillator, this IC controls two photocouplers for rated voltage rated current control and switching between energy-saving and normal modes. Features (1) (2) (3) (4) (5) (6) Automatic switching between energy-saving mode and normal mode Current consumption (energy-saving mode) 60µA Current consumption (normal mode) 1.7mA Reference voltage (internal/output inversion voltage) 1.250V±25mV Uses two photocouplers to control primary side oscillator. Photocouplers are for rated voltage rated current control and switching between energy-saving and normal modes. Package SOP-8D Applications (1) AC adaptors (celler phones, movies, PDA, laptop PCs, others) (2) Chargors (celler phones, movies, PDA, laptop PCs, others) Pin Connetion Diagram www.DataSheet4U.com 8 7 6 5 1 2 PO1 PO2 GND CS 5 6 7 8 REF OUT CNT VCC 1 2 3 4 3 4 SOP-8D MITSUMI Secondary Control for Energy-saving AC Adaptors MM1529 Block Diagram RLS L1 Secondary transformer Load detection resistor RL1 PC2 For load detection RL 2 For rated c...