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AP3970 - (AP3968 - AP3970) Primary Side Power Switcher

Download the AP3970 datasheet PDF. This datasheet also covers the AP3968 variant, as both devices belong to the same (ap3968 - ap3970) primary side power switcher family and are provided as variant models within a single manufacturer datasheet.

General Description

The AP3968/69/70/70S consists of a primary side regulation controller and a high voltage transistor, and is specially designed for off-line power supplies within 12W output power.

Typical applications include adapter for ADSL and auxiliary supplies.

Key Features

  • Primary Side Control for Eliminating Opto-coupler and Secondary CV/CC Control Circuitry Built-in NPN Transistor with 700VCBO Low Start-up Current: 0.2µA (Typ. ) Internal Output Cable Voltage Drop Compensation Random Frequency Modulation for Low EMI Short Circuit Protection Low Total Cost Solution Output Power Range (Note 1): AP3968 for 5W Adapter AP3969 for 7.5W Adapter AP3970 for 12W Adapter AP3970S for 10W Adapter.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AP3968_BCD.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number AP3970
Manufacturer BCD
File Size 566.50 KB
Description (AP3968 - AP3970) Primary Side Power Switcher
Datasheet download datasheet AP3970 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Preliminary Datasheet Primary Side Power Switcher for Off-line SMPS General Description The AP3968/69/70/70S consists of a primary side regulation controller and a high voltage transistor, and is specially designed for off-line power supplies within 12W output power. Typical applications include adapter for ADSL and auxiliary supplies. The AP3968/69/70/70S operates at pulse frequency modulation (PFM), and provides accurate constant voltage, constant current (CV/CC) regulation without requiring an opto-coupler and secondary control circuitry. It has internal cable compensation function for tight constant voltage regulation. The AP3968/69/70/70S solution has fewer component numbers, smaller size, and lower total cost. The AP3968 is packaged in SOIC-7.