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AN667

DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR

AN667 Features

* are:

* Undervoltage lockout with hysteresis and micropower start-up.

* Stable error amplifier.

* Output overvoltage protection.

* Transition Mode Operating

* Zero Current and coil Voltage detection.

* Internal start oscillator. Device Blocks Descriptio

AN667 General Description

Supply Block (see fig. 2): A precise bandgap reference is internally built to ensure a good regulation. The undervoltage comparator with hysteresis and the very-low supply current, before the turn-on threshold is reached, allows to minimize the startup and supply circuitry. Figure 2: Supply Block Di.

AN667 Datasheet (493.89 KB)

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Datasheet Details

Part number:

AN667

Manufacturer:

ST Micro

File Size:

493.89 KB

Description:

Designing a high power factor switching preregulator.
® APPLICATION NOTE DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR WITH THE L6560/A TRANSITION MODE I.C. by G. Comandatore and U. Moriconi Act.

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AN667 DESIGNING HIGH POWER FACTOR SWITCHING PREREGULATOR ST Micro

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