DESCRIPTION

The MP6631 is a three-phase brushless DC

(BLDC) motor driver with integrated power

MOSFETs. The device supports a single

external Hall-effect sensor or triple external

Hall-effect sensors to drive a three-phase BLDC

motor, with up to 3A of peak phase current and

an input voltage (VIN) range of 3.6V to 24V.

The MP6631 controls the motor speed through

the pulse-width modulation (PWM) signal or the

DC signal on the PWM/DC pin with closed-

/open-loop speed control. The device features a

built-in, configurable speed curve function. It

also features a sinusoidal drive for maximum

torque, as well as low speed ripple and noise

across the full speed range.

The MP6631 provides rotational speed

detection. The rotational speed detector (the

FG/RD pin) is an open-drain output. It outputs a

high or low voltage relative to the Hall

comparator’s output. Direction control is

achieved via the DIR pin’s input.

Rich protection features include under-voltage

lockout (UVLO), locked-rotor protection, overcurrent

protection (OCP), and thermal

shutdown protection.

The MP6631 is available in a QFN-26

(3mmx4mm) package.

FEATURES

• 3.6V to 24V Operating Input Voltage (VIN)

Range

• Up to 3A of Peak Phase Current

• Integrated 160mΩ High-Side MOSFETs

(HS-FETs) and Low-Side MOSFETs (LSFETs)

• Sinusoidal Drive

• Supports 0V to 1.2V DC Input or 1kHz to

100kHz Pulse-Width Modulation (PWM)

Input

• Supports Triple-Hall or Single-Hall Element

Differential Input

• Closed-/Open-Loop Speed Control

• Direction/Brake Input

• Power-Save Mode

• 0.5s/4.5s Lock Protection

• Over-Current Protection (OCP)

• Single-Pulse or Triple-Pulse FG Output per

Electrical Cycle

• FG Signal: Rotational Speed Indication

• Soft Start (SS) for Low Noise and Current

Overshoot

• Available in a QFN-26 (3mmx4mm)

Package

APPLICATIONS

• Fans

• General Three-Phase Brushless DC (BLDC)

Motors

• Pumps