FT3003 Motor Controller Datasheet

FT3003 Datasheet, PDF, Equivalent


Part Number

FT3003

Description

Three Phase Sensorless BLDC Motor Controller

Manufacture

Fortior

Total Page 3 Pages
Datasheet
Download FT3003 Datasheet


FT3003
` FT3003
Three Phase Sensorless BLDC Motor Controller
Description
The FT3003 is a Three Phase sensorless BLDC Motor
controller. Due to its adaptive features and wide
power-supply range capabilities, FT3003 is intended to
cover a wide range of motor characteristics, while requiring
minimal tuning from the user. Two drive modes are
provided, namely SBLDC (quasi-sine-wave) modulation or
BLDC (120°). Speed can be controlled either by setting
the closed speed reference directly or through the
adjustment of PWM duty cycle linearly proportional to the
output speed. Speed indicator is provided through a
Frequency Generator output (FG×3), generating digital
pulse with its frequency proportional to the speed of the
motor. FT3003 has an automatic internal bootstrap charge
management scheme ensuring that the bootstrap capacitor
is always sufficiently charged for safe operation of the
power MOSFETS.
Protection functions of FT3003 are comprehensive
including lock protection and automatic recovery, under
voltage, thermal shutdown, current limit and over current
protections. These prevent the control circuits and the
motor from being damaged, particularly under stressed
applications and demanding environments.
Feature
Position sensorless BLDC controller
Selectable SBLDC (quasi-sine-wave) or BLDC
(120°) drives
Lead angle control
Closed loop speed control
Direct or PWM duty cycle adjusted (linear) closed
loop speed control
FG (Frequency Generator)
Current limit and over current protection
Built-in independent operational amplifier
Built-in lock protection and automatic recovery circuit
Built-in thermal shutdown protection (TSD)
Built-in under voltage lock out protection. (UVLO)
Built-in over voltage protection of motor driver
ALIGN
F/R
START
BRAKE
PWM
TMOD
FSOURCE
SREF
VTH
SPEED
INP
OPO
INN
Block Diagram
VDD5
FG
LDO
VCC
VSS
EFUSE
Saw Tooth
Generator
xa
OVP
OVP
VSENSE
PWM_UH
PWM_VH
PWM_WH
PWM_UL
PWM_VL
PWM_WL
2.5V
ADC
ADC
ILIMIT
ITRIP
FAULT
LA
TSD
UVLO
BEMF
Lock
Protection
EMF_U EMF_V EMF_W
www.fortiortech.com

FT3003
Pin Assignment
FT3003
`
INP 1
24 ITRIP
INN 2
23 PWM_UH
OPO
3
22 PWM_VH
VSENSE
4
21 PWM_WH
OVP
SPEED
5
6
FT3003
20 ALIGN
19 TMOD
SREF
7
18 VTH
FSOURCE
8
17 ILIMIT
Pin Configuration
PIN
PIN Name Type
NO.
Description
1 INP I The positive input of the operational amplifier
2 INN I The negative input of the operational amplifier
3
OPO
O The output of the operational amplifier
4 VSENSE I Motor Drive Voltage-Sensing Resistor. Designed for determining the voltage
level of over-voltage protections.
5
OVP
O Motor Drive Over-Voltage Protection Output. It can be connected to an
external power transistor for discharging the back EMF.
6 SPEED I Reference speed analog input
7 SREF I Analog input voltage for linear reference speed adjustment.
8 FSOURCE I Test signal input, connect to GND.
9 FG O Open drain. Frequency Generator, speed signal output.
10 PWM I PWM duty cycle input for linear reference speed adjustment. Internal pull-up.
11 LA I Lead angle select analog input
12 START
I Motor start input. High: Start; Low: Free. Internal pull-up.
13 BRAKE I Brake signal input. Low: Brake. Internal pull-up.
14 F/R I Motor rotation direction input
15
VSS
GND Signal and power ground.
16 FAULT
I Over current protection input. Internal pull-up
17 ILIMIT
I Current limit analog input
Rev_1.0
2


Features ` FT3003 Three Phase Sensorless BLDC Mo tor Controller Description The FT3003 is a Three Phase sensorless BLDC Motor controller. Due to its adaptive feature s and wide power-supply range capabilit ies, FT3003 is intended to cover a wide range of motor characteristics, while requiring minimal tuning from the user. Two drive modes are provided, namely S BLDC (quasi-sine-wave) modulation or BL DC (120°). Speed can be controlled eit her by setting the closed speed referen ce directly or through the adjustment o f PWM duty cycle linearly proportional to the output speed. Speed indicator is provided through a Frequency Generator output (FG×3), generating digital pul se with its frequency proportional to t he speed of the motor. FT3003 has an au tomatic internal bootstrap charge manag ement scheme ensuring that the bootstra p capacitor is always sufficiently char ged for safe operation of the power MOS FETS. Protection functions of FT3003 ar e comprehensive including lock protection and automatic recovery,.
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