US168 / US169
Low Noise & Low voltage
Single-Coil Fan/Motor Driver
Features and Benefits
Soft Switching for low noise
Low supply voltage: 1.8V to 6.5V
Full Bridge driver
High sensitivity integrated Hall sensor
Low power consumption
Reverse voltage protection
Locked rotor protection and auto-restart
Thermal protection and auto-restart
Tachometer output signal (US168) or
Alarm output signal (US169)
Applications Examples
3V / 5V Low Noise BLDC Cooling Fans
Low Voltage / Low Power BLDC Motors
Notebook DC Fans / Blowers
Automotive Low Noise Climate Control Fans
Micro-Motors
Ordering Information
Part No.
US168
US169
Temperature Code
E (-40° to 85°
C
C)
E (-40° to 85°
C
C)
Package Code
SE (TSOT-5L)
SE (TSOT-5L)
1 Functional Diagram
2 General Description
The US168/169 is a one-chip solution for driving
single-coil brushless DC fans and motors.
The use of Melexis Soft Switching concept lowers
the acoustic and electrical motor noise and
provides smoother operation.
The device includes reverse voltage protection,
locked rotor protection and thermal protection.
Therefore, the IC robustness perfectly suits for
consumer and automotive-on-board applications.
Tachometer (FG) or Alarm (RD) open-drain output
is available. It makes easier the connectivity with
external interface such as hardware monitoring or
Super I/O IC.
Delivered in a thin and reliable TSOT package, it
allows smaller and competitive single-coil fan or
motor design, avoiding the need of external
components.
390109027901
Rev 001
Page 1 of 13
Data Sheet
July/06
MELEXIS [ Melexis Microelectronic Systems ]
