AMT49400 Driver Datasheet

AMT49400 Datasheet PDF, Equivalent


Part Number

AMT49400

Description

Integrated Sensorless FOC BLDC Driver

Manufacture

Allegro

Total Page 15 Pages
Datasheet
Download AMT49400 Datasheet


AMT49400
AMT49400
Integrated Sensorless FOC BLDC Driver
FEATURES AND BENEFITS
• Coding-free sensorless field-oriented control (FOC)
• Standby mode current less than 10 µA
• Quiet and quick startup
• Only two external components for minimal application
circuit
• PWM speed input, FG speed output
• Lock detection
• Soft-on soft-off (SOSO)
• Optional closed-loop speed control
• Configurable current limit
• Windmill and reverse windmill operation
• Lock detection
• Short-circuit protection (OCP)
PACKAGE:
DESCRIPTION
TheAMT49400 is an advanced 3-phase, sensorless, brushless
DC (BLDC) motor driver with integrated power MOSFETs.
A minimal application circuit can be achieved with only
two external components due to device’s high level of
integration, which includes control algorithm, analog circuit,
and power stage.
A field-oriented control (FOC) algorithm is fully integrated
to achieve the best efficiency and acoustic noise performance.
EEPROM programmability is included to optimize motor
startup performance.
The motor speed is controlled by applying a duty cycle
command to the PWM input.Asimple I2C interface is provided
for setting motor-rated voltage, rated current, rated speed,
resistance, and startup profiles. The I2C interface is also
used for on/off control, speed control, and speed readback.
The AMT49400 is available in a 10-lead SOIC with exposed
pad, (suffix LK).
10-lead SOIC
with exposed thermal pad
(LK package)
Not to scale
APPLICATIONS
• Computer fans
• Exhaust fans
• Home appliance fans and pumps
VCC 4.7 µF
FG
PWM
VREF
0.22 µF
AMT49400-DS, Rev. 2
MCO-0000626
VBB
AMT49400
FOC Controller
GND
Figure 1: Typical Application
OUTA
OUTB
OUTC
TEST1
TEST2
June 10, 2019

AMT49400
AMT49400
Integrated Sensorless FOC BLDC Driver
SELECTION GUIDE
Part Number
AMT49400GLKATR
Ambient Temperature
Range (TA) (°C)
–40 to 105
Packaging
10-lead SOIC with exposed thermal pad
Packing
3000 pieces per 13-inch reel
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Supply Voltage
VBB
Logic Input Voltage Range
Logic Output – FG
Output Current
Output Voltage
Junction Temperature
Storage Temperature Range
Operating Temperature Range
VIN
VO
IOUT
VOUT
TJ
Tstg
TA
tw < 10 ms
Notes
PWM
PWM (pull-up resistor > 50 kΩ)
FG
Range G
Rating
–0.3 to 20
–0.3 to 18
–0.3 to 6
VBB
18
2
GND – 1 to VBB + 1
150
–55 to 150
–40 to 105
Unit
V
V
V
V
V
A
V
°C
°C
°C
THERMAL CHARACTERISTICS
Characteristic
Symbol
Test Conditions*
Package Thermal Resistance
RθJA
10-lead SOIC (package LK), on 2-sided PCB 1-in.2 copper
*Additional thermal information available on the Allegro website.
Value Unit
40 °C/W
PINOUT DIAGRAM AND TERMINAL LIST
PWM 1
FG 2
VBB 3
OUTA 4
OUTB 5
PAD
10 TEST2
9 TEST1
8 VREF
7 OUTC
6 GND
LK-10 Package Pinouts
Terminal List Table
Terminal
Number
Name
1 PWM
2 FG
3 VBB
4 OUTA
5 OUTB
6 GND
7 OUTC
8 VREF
9 TEST1
10 TEST2
PAD
PAD
Function
Logic input – speed demand
Output signal
Input supply
Motor terminal
Motor terminal
Ground
Motor terminal
Reference voltage output
Test use only
Test use only
Exposed pad for enhanced thermal dissipation
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2


Features AMT49400 Integrated Sensorless FOC BLDC Driver FEATURES AND BENEFITS • Codi ng-free sensorless field-oriented contr ol (FOC) • Standby mode current less than 10 µA • Quiet and quick star tup • Only two external components f or minimal application circuit • PWM speed input, FG speed output • Lock detection • Soft-on soft-off (SOSO) • Optional closed-loop speed contro l • Configurable current limit • Windmill and reverse windmill operation • Lock detection • Short-circuit protection (OCP) PACKAGE: DESCRIPTION TheAMT49400 is an advanced 3-phase, se nsorless, brushless DC (BLDC) motor dri ver with integrated power MOSFETs. A mi nimal application circuit can be achiev ed with only two external components du e to device’s high level of integrati on, which includes control algorithm, a nalog circuit, and power stage. A field -oriented control (FOC) algorithm is fu lly integrated to achieve the best effi ciency and acoustic noise performance. EEPROM programmability is included to optimize motor.
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