--PN6370P

一、General Description
The PN6370P consists of a Low Standby-Power Quasi-Resonant (QR) Primary-Side controller and a 690V avalanche-rugged
smart power VDMOSFET, specifically designed for a high performance AC/DC charger or adaptor with minimal external
components. PN6370P operates in primary-side sensing and regulation, so opto-coupler and TL431 could be eliminated. Because
of internal HV Start-up circuit, the system with PN6370P can achieve less than 30mW standby power consumption (230VAC). In
CV mode, multi-mode and quasi resonant technique is utilized to achieve high efficiency, avoid audible noise and make the
system meeting Energy star class VI. Good load regulation is achieved by the built-in cable drop compensation. In CC mode, the
current and output power setting can be adjusted externally by the sense resistor at CS pin. PN6370P offers complete protections
including Cycle-by-Cycle current limiting protection (OCP), over voltage protection (OVP), over temperature protection (OTP)
and CS open or short protection (CSO/SP) etc. AC input over voltage protection (OVP) and brownout protection (BO) are also
integrated inside PN6370P, and can be adjusted by system resistor divider.

Features
■ Internal 690 V avalanche-rugged smart power VDMOSFET
■ Internal HV Start-up Circuit, Standby power < 30mW
■ Multi-mode and Quasi-Resonant technique
■ ±5% CC Regulation at Universal AC input
■ Primary-side Sensing and Regulation without TL431 and
Opto-coupler
■ Programmable Cable Drop Compensation
■ No-need Control Loop Compensation Capacitance
■ Excellent Protection Coverage:
.. Over Temperature Protection (OTP)
.. VDD Under/Over Voltage Protection(UVLO&OVP)
.. Cycle-by-Cycle Current Limiting (OCP)
.. Cs Short/Open Protection (CS O/SP)
.. AC overvoltage and brownout protection (OVP &BO)

三、Applications

■ Switch AC/DC Adaptor
■ Battery Charger

五、Typical Circuit

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