US63_14 Datasheet, PDF (1/11 Pages) Melexis Microelectronic Systems – Two-coil Fan Driver

US62 / US63
Two-coil Fan Driver
Features and Benefits
0 Low cost
0 High sensitivity Hall Sensor
0 Locked rotor protection and auto-restart
0 Power-efficient CMOS and power MOSFETs
0 Built-in output protection clamping diode
0 Integrated tachometer (US62) or alarm (US63)
signal protected output
0 2-coil fan driver with FG/RD output in
4-pin VK package RoHS Compliant
Application Examples
0 5/12V fans
0 Peak current up to 700mA
Ordering Code
Product Code Temperature Code
US63
E
US62
E
Package Code
VK
VK
Option Code Packing Form Code
AAA-000
BU
AAA-000
BU
Legend:
Temperature Code:
Package Code:
Option Code:
Packing Form:
E for Temperature Range -40°C to 85°C
VK for Plastic Single in Line
xxx-000: standard Version
BU for Bulk
Ordering example:
US63EVK-AAA-000-BU
1 Functional Diagram
2 General Description
The US62/63 is a one-chip solution for driving two-
coil brushless DC cooling fans.
Based on the advanced Melexis CMOS process,
the IC contains a Hall-effect sensor, dynamic
offset correction and low side output drivers.
Frequency Generator or Rotation Detection is
available. The open-drain output makes easier the
connectivity with any external interface such as
hardware monitoring or Super I/O IC.
These features are combined with the Melexis
patented no-V_DD design to fit the IC in a small 4-
pin VK package.
3901000062
Rev 003
Page 1 of 11
Data Sheet
Apr/12