AC-DC（PSR）
多模式原边反馈CC/CV控制器 SA3540
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产品简介
SA3540 is a high performance Primary Side Regulation (PSR) power switch with high precision CV/CC control ideal for charger applications. The IC can also support Quasi-Resonant (QR) Buck constant current topology for LED lighting if SEL pin is short to GND. In CV mode, SA3540 adopt Multi Mode Control which uses the hybrid of AM mode (Amplitude Modulation) and FM mode (Frequency Modulation) to improve system efficiency and reliability. In CC mode, the IC uses PFM control with line and load CC compensation. The IC can achieve audio noise free operation and optimized dynamic response.The built-in Cable Drop Compensation (CDC) function can provide excellent CV performance. SA3540 integrate functions and protections of Under Voltage Lockout (UVLO), VDD over Voltage Protection (VDD OVP), Cycle-by-cycle Current Limiting (OCP), Short Load Protection (SLP), and VDD Clamping.SA3540 is available in SOT23-6 package.
产品特点
l Support Flyback and Buck Topology:
Flyback PSR Control (SEL= Floating)
QR-Buck CC Control (SEL= GND)
l Multi Mode PSR Control
l Audio Noise Free Operation for PSR
l Optimized Dynamic Response for PSR
l Low Standby Power <70mW
l ±4% CC and CV Regulation
l Programmable Cable Drop Compensation：
(CDC) in PSR CV Mode
l Built-in AC Line & Load CC Compensation
l Build in Protections:
Short Load Protection (SLP)
On-Chip Thermal Shutdown (OTP)
Cycle-by-Cycle Current Limiting
Leading Edge Blanking (LEB)
Pin Floating Protection
l VDD OVP & Clamp
应用电路图
规格书内容