Designed to simplify offline power supplies up to 15 W, the L6590 fully integrated power supply chip from STMicroelectronics integrates a 700 V power MOSFET switch, plus all the control circuits needed to build a converter using flyback, boost or forward topologies.
The device operates over the universal input voltage range of 85 to 265 VAC and also with DC inputs.
An on-chip 65 kHz oscillator eliminates the need for external oscillator components and a non-dissipative internal start-up circuit guarantees high efficiency at light load and also further reduces the external parts count.
Standby operating mode ensures high efficiency at light loads (Pin<200 mW at Po = 0 W) meeting the tightest regulations concerning standby operation.
A brownout function prevents spurious turn-on at power down and protects against input line undervoltage. In addition, an on-chip error amplifier improves primary regulation, avoiding the cost of an external optocoupler and op-amp feedback network.
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