A3520 Datasheet, PDF (1/2 Pages) alpha microelectronics gmbh – DC motor controller IC, providing a single chip solution

a3520 general 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 components 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
MCU Features
 Operating VCC range from 5-18V
 On-chip 25MHz ±1% oscillator
 10bit AD Converter with 8-channel
multiplexer
 On-chip 3.3V/5mA regulator
 On-chip programmable
0.7V to 2.7V/10mA 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 dead-
time
 Programmable current limit
 analog comparator with
programmable hysteresis
(Hall sensor, Phase voltage
feedback)
 Standard compatible MCU
 Powerful single cycle instruction set
(only RAM access and branches need
two cycles)
 25MHz MCU clock
 12 prioritized interrupt levels
 256Byte RAM
 4kByte 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.