Description
The LP3792 is a high performance AC/DC power supply controller for battery charger and adapter
applications. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous
conduction mode (DCM) flyback power supplies. The LP3792 provides accurate constant voltage,
constant current (CV/CC) regulation without requiring opto-coupler and the secondary control circuitry. It also eliminates the need of loop compensation
circuitry while maintaining good stability. The LP3792 can achieve excellent regulation and
high average efficiency which is suitable for US DoE VI requirement, yet meets no-load consumption less than 75 mW. The LP3792 provides many protections which
include OVP ,OTP and output short protection. The LP3792 is available in SOT23-6.
Features
Drive power MOS and Suitable for US DoE VI application
Valley voltage Turn on to advance efficiency
The external drive MOS
High precision CC/CV output
≦75 mW Standby power
Proprietary cable voltage drop compensation
FB Pin open-short Protection
VCC Pin UVLO Protection
Over temperature Protection
Application
Adapters/Chargers for Cell/cordless Phones, PDAs, MP3 and Other Portable Devices
Upgrading the best choice - linear power supply and RCC switching power supply
Standby and Auxiliary Power Supplies
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