A3520 Datasheet | Alpha Microelectronics

features The a3520 is a DC motor controller IC, providing a single chip solution for a wide range of tasks including power supply, motor control and high level system control. The IC's ponents enable parallel execution of system functions such as PWM input capture, current limit monitoring, bridge clock generation, etc., while reducing the IC's MCU's load and memory requirements. IC Features  Operating VCC range from 5-18V  On-chip 25MHz ±1% oscillator  10bit AD Converter with 8-channel multiplexer  On-chip 3.3V/5m A regulator  On-chip programmable 0.7V to 2.7V/10m A regulator, suitable for driving passive hall elements  VCC monitor  On-chip temperature sensor  6 gate driver outputs with pull and dump resistors  PWM input capture unit to decode duty cycles of external signals  Open drain signal output, over current protected  Two wire interface  0-VCC high voltage PWM-output ready to drive inrush current protection transistors  Up to 10 pins usable as GPIO  Spread spectrum PWM support via software  Non-overlapping bridge clock generator with programmable deadtime  Programmable current limit  analog parator with programmable hysteresis (Hall sensor, Phase voltage feedback) MCU Features  Standard patible MCU  Powerful single cycle instruction set (only RAM access and branches need two cycles)  25MHz MCU clock  12 prioritized interrupt levels  256Byte RAM  4k Byte Pseudo-MTP program memory  Four 16bit timers with pre-scaler  Two 8 bit timers with pre-scaler  Hardware watchdog timer  On-chip debugging support  Fast RAM-based development support  Two wire programming and debugging interface Package: QFN28 The 28 pin 4x4mm QFN package option is best suited for small board designs. .. example application schematics Only a few external ponents are needed to build a simple motor application: +12V power supply 100n F +3.3V output VIO 100n F 100n F 100n F 100n F PWM input VCC TACHO output VD VA VCC DAC PD1H PD1L PD2H PD2L PD2H PD2L VREF PWMIN...