Datasheet > A3131

A3131

更新时间： 2022-12-19 16:05:27

品牌	Logo	应用领域
ALPHA-MICRO		开关功率因数校正
页数	文件大小	规格书
2页	139K
描述
universal DSP-based PFC solution with Switching-mode

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A3131 数据手册

a3131 general features

The a3131 is a universal DSP-based PFC solution with Switching-mode Power Supply to

be used in applications requiring power factor values close to unity and highly efficient DC

power supply. Typical application areas for the a3131 are high-power DC motor controllers

and lighting systems. The power factor controller (PFC) is based on the boost topology

and is fully software-controlled. The PFC algorithm is loaded from an on-chip non-volatile

memory for stand-alone operation or can be uploaded to the DSP core using a two-wire

interface.

The switching-mode power supply controller (SMPSC) is based on the flyback topology

with current feedback, and its role is to provide supply voltage(s) for any low-voltage

electronics. Due to its immediate response, the current feedback topology makes the

a3131 especially attractive for systems in which relatively high swings of the AC line

voltage are expected.

Highlights:

PFC

 Fully reconfigurable digitally-controlled power factor controller in CMOS

technology

 On-chip AC-phase-locked sinusoidal 45...65Hz oscillator to improve AC-line

noise rejection

 High accuracy through on-chip 10bit ADC and dedicated RISC processor

 Achievable high efficiency (>95%) and power factor (>0.99)

 Broad range of user-selectable PWM frequency (5kHz...200kHz)

 Low EMC filter requirements due to use of spread-spectrum PWM

 Two-wire interface to load software

 Supports 90V...135V and 195V...275V 60/50Hz mains standards

 On-chip PLL with 1% RC reference oscillator to generate 64MHz clock signal

Switching-Mode Power Supply Controller

 Current-mode switching power supply controller in CMOS technology

 Immediate response to low-frequency AC line swings

 Output voltage and current levels determined by external components only

 Energy-saving cycle-skipping mode for operation with low levels of output power

 On-chip overcurrent and short-circuit protection

 On-chip reference voltage source

Available Options:

 On-chip gate drivers

 On-chip OTP memory for stand-alone operation of PFC

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型号	品牌	描述	获取价格	数据表
A3132	ALLEGRO	ULTRA-SENSITIVE BIPOLAR HALL-EFFECT SWITCHES	获取价格
A3134	ALLEGRO	BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION	获取价格
A3134LT*	ETC	BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION	获取价格
A3134UA*	ETC	BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION	获取价格
A3134ELL	ETC	Hall-Effect Switch	获取价格
A3134ELT	ALLEGRO	BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION	获取价格