MP9518
Single-Phase, BLDC, Motor Driver
with Integrated Hall Sensor
DESCRIPTION
FEATURES
Embedded Hall Sensor with High Sensitivity
Wide 3.3V to 18V Operating Input Range
Up to 1.2A Programmable Current Limit
Integrated Power MOSFETs: Total 850mΩ
(HS + LS)
Automatic Phase Lock Detection of Winding
BEMF and Current Zero-Crossing
Soft On/Off Phase Transition
Rotational Speed Indicator FG Signal
12kHz to 48kHz PWM Input Frequency
Range
Fixed 26kHz Output Switching Frequency
Input Line Reverse-Voltage Protection (RVP)
Rotor Deadlocked Protection and Automatic
Recovery
The MP9518 is a single-phase, brushless, DC
motor driver with integrated power MOSFETs
and a hall-effect sensor. The MP9518 drives
single-phase, brushless, DC fan motors with up
to 1.2A of output current limit. The IC has a
3.3V to 18V input voltage range and input line
reverse-voltage protection to save the external
diode on the supply line.
The MP9518 controls the rotational speed
through the PWM signal on the PWM pin. The
MP9518 has a rotational speed detector feature
and rotor lock fault indication on FG/RD with an
open-drain collector output. The output speed
versus the input duty curve can be programmed
easily for flexible use. To reduce fan driver
audible noise and power loss, the MP9518
features a soft on/off phase transition and
automatic phase-lock function of the motor
winding BEMF and current.
Thermal Protection and Automatic Recovery
Built-In Input OVP, UVLO, and Automatic
Recovery
Available in a TSOT23-6 Package
APPLICATIONS
Full protection features include input over-
voltage protection (OVP), under-voltage lockout
(UVLO), rotor deadlocked protection, thermal
shutdown, and input reverse protection.
CPU Fan for Personal Computers or
Servers
Brushless DC Motors
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For
MPS green status, please visit the MPS website under Quality
Assurance. “MPS” and “The Future of Analog IC Technology” are registered
trademarks of Monolithic Power Systems, Inc.
The MP9518 requires a minimal number of
external components to save solution cost. The
MP9518 is available in a TSOT23-6 package.
TYPICAL APPLICATION
OUT1
GND
VCC
1
6
C1
Motor
OUT2
2
3
5
4
R1
FG/RD PWM
MP9518 Rev.1.0
7/24/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
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