MLX90401
Brushless DC Motor Controller
Features and benefits
•
12V to 40V operating range
•
BVDSS > 60V
•
On-chip “boost” voltage allows use of all
N-channel drivers
•
On-chip PWM oscillator
•
PWM speed control via bottom drivers
•
Forward and reverse control
•
Selectable 60° or 120° sensor electrical
phasing
•
Undervoltage lockout
•
Qualified for automotive applications
Ordering information
Part No.
MLX90401
Temperature Code
K (-40°C to 125°C)
Package Code
DF (300” SOIC24)
Application examples
•
Handheld Battery powered applications:
o
Power tools (drills, screwdrivers, etc.)
•
Electrical bicycles, wheelchairs, etc.
•
Automotive applications:
o
Manual HVAC Blowers
o
Water and other pumps
1 Pin configuration
1
2
3
4
5
6
7
8
9
10
11
12
Supply Voltage
V
REF
Out
Hall "A" Input
Hall "B" Input
Hall "C" Input
Fwd/Rev Input
Speed Adjust Input / Disable
Oscillator R/C
/Brake Input
Analog Ground
60°/120° Select Input
Power Ground
Cap Boost "A"
Gate Top "A"
Feedback "A"
Cap Boost "B"
Gate Top "B"
Feedback "B"
Cap Boost "C"
Gate Top "C"
Feedback "C"
Gate Bottom "A"
Gate Bottom "B"
Gate Bottom "C"
24
23
22
21
20
19
18
17
16
15
14
13
2 General description
The MLX90401 is a three-phase brushless DC
motor controller, designed to meet the needs of
high volume, low cost motors with 60
o
or 120°
electrical sensor phasing which do not require
the expensive options needed for servo or other
closed loop applications.
The use of CMOS technology offers dense logic
as well as high voltage (60V) driver capabilities.
The use of discrete low cost N-channel power
FETs reduces overall system cost and the
device provides all of the logic necessary to
interface Hall-effect position sensors to N-
channel power FETs. Upper N-channel power
FETs require a gate drive in excess of the
supply voltage V+, and with the device’s on-chip
“boost” voltage, the use of all N-Channel power
FETs is allowed. Control inputs are provided for
motor speed, forward or reverse direction,
disable, and braking. 60° or 120° electrical
sensor phasing can be set externally.
The device is offered in a 24 Lead Wide Body
SOIC package (DF).
Figure 1: Pin configuration
3901090401
Rev 005
Page 1 of 13
Data sheet
Oct/05
MELEXIS [ Melexis Microelectronic Systems ]
