MLX90401KDF MELEXIS [Melexis Microelectronic Systems], MLX90401KDF Datasheet - Page 5

• Manufacturer Part Number: MLX90401KDF
• Description: Brushless DC Motor Controller
• Manufacturer: MELEXIS [Melexis Microelectronic Systems]

7 General description
7.1 Overview
The MLX90401 contains all functions for controlling three-phase brushless DC motors in open loop
applications.
The MLX90401 supports following control functions:
The chip contains:
Using a bootstrap/charge pump combination, the MLX90401 also generates a boost voltage to drive the top
power FET. In this way the application only uses N-channel power FETS, to reduce overall system cost.
The MLX90401 provides commutation from Hall-effect sensors, and can be configured for motors with 60°
or 120° sensor electrical phasing, by means of a select pin.
Undervoltage lockout is provided.
3901090401
Rev 005
Top output on resistance
Bottom output on resistance
Rise time
Fall time
Turn-on propagation delay
Turn-off propagation delay
Leakage current
• speed control
• forward or reverse rotation
• braking
• disable
• a rotor position decoder for proper commutation sequencing
• a voltage reference that supplies power for the sensors
• a pulse width modulator (PWM) based on a frequency programmable sawtooth oscillator
• three top and three bottom drivers
R
R
I
t
t
OFF
don
doff
ONB
ONT
t
t
r
f
Table 3: MLX90401 electrical specifications
Page 5 of 13
I
I
LOAD
LOAD
V
Top drivers
OUT
Drivers
= 50mA
= 50mA
= 60V
Brushless DC Motor Controller
MLX90401
150
150
300
300
-10
32
32
Data sheet
Ohm
Ohm
Oct/05
uA
ns
ns
ns
ns