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
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)
MCU Features
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.
ALPHA-MICRO [ ALPHA MICROELECTRONICS GMBH ]
