US890 Melexis Company, US890 Datasheet
US890
Available stocks
Related parts for US890
US890 Summary of contents
Page 1
... Temperature Code E (-40° 85° (-40° 85° General Description The US890/891 is a one-chip solution for driving two-coil brushless DC motors and fans. Based on the advanced Melexis CMOS process, the IC contains a Hall-effect sensor, dynamic offset correction and powerful output drivers with 1200mA peak output current capability ...
Page 2
... Application Comments ................................................................................................. 9 15 Standard information regarding manufacturability of Melexis products with different soldering processes......................................................................................... 10 16 ESD Precautions ......................................................................................................... Package Information (4-pin TO-92)...................................................................... 11 18 Disclaimer.................................................................................................................... 12 3901000890 Rev 002 Two-Coil Fan Driver – High Output Current ....................................................................................... 7 A ..................................................................................... 7 DD Page US890 / US891 Data Sheet Sep/07 ...
Page 3
... Pin Definitions and Descriptions Pin Name Pin number Table 2: Pin definitions and descriptions 3901000890 Rev 002 Two-Coil Fan Driver – High Output Current and the output driver resistance R Symbol Value Units ° ° ° Function Page US890 / US891 DSON. Data Sheet Sep/07 ...
Page 4
... V =2. COIL 12V (unless otherwise specified) DD Test Conditions OUT1 OUT2 FG Page US890 / US891 Min Typ Max Units Ω Ω ° µ Min Typ Max Units Data Sheet Sep/07 ...
Page 5
... Detailed General Description The US890/891 is a one-chip solution for driving two-coil brushless DC motors and fans. Based on advanced Melexis CMOS process, the chip contains a Hall-effect sensor, dynamic offset correction and powerful output drivers with 1200mA peak output current capability. The low side output coil drivers are fully protected against switching transients external zener diode is not needed to cut the high voltage spikes induced by the motor coils ...
Page 6
... The FG/RD output driver provides an over current protection limiting the current flowing in the FG/RD driver while switched ON. It can occur if a too small pull-up resistor is used or if this resistor is short connected. This protection reduces the risk of EOS damage on the FG/RD driver. 3901000890 Rev 002 US890 / US891 Two-Coil Fan Driver – High Output Current Page =25° ...
Page 7
... VDD = 2.5V VDD = 5V VDD = 12V 3 VDD = 18V 100 110 120 Page US890 / US891 -40° 25° 85° 105° 125° VDD (Volts) DD Bop, Ta=25° C Brp, Ta=25° ...
Page 8
... Test conditions 12.1 V – operating DD 12 3901000890 Rev 002 US890 / US891 Two-Coil Fan Driver – High Output Current 12.2 R DSON 12.4 FG/RD Output Low Voltage Page Data Sheet Sep/07 ...
Page 9
... For 2-wire fan application (tachometer or alarm logical output not required), the FG/RD pin (#1) should be connected to the device ground pin (#4). 3901000890 Rev 002 US890 / US891 Two-Coil Fan Driver – High Output Current 13.2 Recommended circuit for ground disconnection protection Page ...
Page 10
... ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 3901000890 Rev 002 US890 / US891 Two-Coil Fan Driver – High Output Current Page Data Sheet Sep/07 ...
Page 11
... VK Package Information (4-pin TO-92) 3901000890 Rev 002 Two-Coil Fan Driver – High Output Current Hall plate location Page US890 / US891 Data Sheet Sep/07 ...
Page 12
... Or for additional information contact Melexis Direct: Europe and Japan: Phone: +32 1367 0495 E-mail: sales_europe@melexis.com 3901000890 Rev 002 Two-Coil Fan Driver – High Output Current www.melexis.com All other locations: Phone: +1 603 223 2362 E-mail: sales_usa@melexis.com ISO/TS 16949 and ISO14001 Certified Page US890 / US891 Data Sheet Sep/07 ...