mlx90401 Melexis Company, mlx90401 Datasheet - Page 3

• Manufacturer Part Number: mlx90401
• Description: Brushless Dc Motor Controller Not For New Designs!
• Manufacturer: Melexis Company

3 Glossary of terms
FET
PWM
Undervoltage
Overcurrent
4 Pin definitions and description
3901090401
Rev 005
Pin
1
2
3-5
6
7
8
9
10
11
12
13-15
16, 19, 22
17, 20, 23
18, 22, 24
Symbol
Supply voltage
V
Hall "A", "B" and "C" Inputs
Fwd/Rev Input
Speed Adjust Input/Disable
Oscillator R/C
/Brake Input
Analog ground
60°/120° Select Input
Power Ground
Gate Bottom "A", "B" and
"C"
Feedback "A", "B" and "C"
Gate Top "A", "B" and "C"
Cap Boost "A", "B" and "C"
REF
Field Effect Transistor
Pulse Width Modulation
State in which the power supply voltage is lower than the operation range of the
device.
State in which the current flowing in a certain device (e.g. output driver, motor, etc.)
exceeds a maximum defined level. This includes both overload and short-circuit
currents.
Out
Table 1: Pin definitions and description
Page 3 of 13
Description
External power supply voltage.
Regulated reference voltage (12V) derived from V+.
Used to power external components and Hall-effect
sensors, and for boost voltage.
Pull-up resistance of 3.3k to 5V.
The Forward/Reverse Input is used to change the
direction of motor rotation. A logic high state selects
forward direction; a logic low state selects reverse
direction.
Pull-up resistance of 3.3k to 5V.
Potentiometer input - adjusts the PWM duty cycle setting
current, allowing a manual speed adjustment.
Disable input can be used in combination with any type
of switch (thermal, Hall, etc.). A logic low on this pin
selects the disable function.
for the timing components RRC and CRC.
A logic high state at this input allows the motor to run,
while a low state causes rapid deceleration.
Pull-up resistance of 3.3k to 5V.
Ground pin for analog blocks.
A logic high state on this pin selects 60° sensor electrical
phasing, a logic low state selects 120°.
Pull-up resistance of 3.3k to 5V.
Ground pin for digital and output drivers.
Three push-pull drivers for direct drive of bottom power
switch transistors.
Negative supply of the top drive circuitry. It is the
connection for the negative side of the bootstrap
capacitor, the top power FET Source, the bottom power
FET Drain, and the Phase C output.
switch transistors.
Positive supply of the top drive circuitry. The boost
capacitor is connected between this pin and Feedback.
Hall IC open collect inputs.
The Oscillator frequency is set with the values selected
Three push-pull drivers for direct drive of top power
Brushless DC Motor Controller
MLX90401
Data sheet
Oct/05