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SN57CPA - High Precision CC/CV Primary-Side PWM Power Switch

Download the SN57CPA datasheet PDF. This datasheet also covers the SN57 variant, as both devices belong to the same high precision cc/cv primary-side pwm power switch family and are provided as variant models within a single manufacturer datasheet.

Description

SN57 is a high performance offline PSR power switch for low power AC/DC charger and adapter applications.

It operates in primary-side sensing and regulation.

Consequently, opto-coupler and TL431 could be eliminated.

Features

  • including Cycle-by-Cycle current limiting, VDD over voltage protection, short circuit protection, built-in leading edge blanking, VDD under voltage lockout (UVLO), OTP etc. SN57 is offered in SOP8 package.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (SN57-OnBrightElectronics.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number SN57CPA
Manufacturer On-Bright
File Size 818.24 KB
Description High Precision CC/CV Primary-Side PWM Power Switch
Datasheet download datasheet SN57CPA Datasheet

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Other Datasheets by On-Bright

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SN57CP High Precision CC/CV Primary-Side PWM Power Switch
SN57 High Precision CC/CV Primary-Side PWM Power Switch

Full PDF Text Transcription

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SN57 High Precision CC/CV Primary-Side PWM Power Switch GENERAL DESCRIPTION SN57 is a high performance offline PSR power switch for low power AC/DC charger and adapter applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in cable drop compensation.
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