LB1868 ONSEMI | Alldatasheet

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Technical content

Features

  • Output protection Zener diode with variable withstand voltage Z1, Z2 pins open: VOLM = 57V (24V specification) Z1, Z2 pins shorted: VOLM = 32V (12V specification) External Zener diode connected across Z1 − VCC pins: support for fans with large drive current
  • External resistor allows configuration for 12V or 24V
  • Direct Hall element connection possible (built-in Hall amplifier with hysteresis supports core without auxiliary electrode)
  • Built-in output transistor with 1.0A output current (strengthened negative-current support for core without auxiliary electrode)
  • Built-in rotation detection function: Low during rotation and High during stop
  • Built-in lockup protection with automatic recovery
  • Built-in thermal shutdown Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum input current I CC max t ≤ 20ms 200 mA Maximum applied output voltage V OUT max Internal V Maximum output current I OUT max 1.0 A Maximum current flowing into RD pin I RD max 10 mA Maximum RD applied voltage V RD max 30 V Allowable power dissipation Pd max 1.1 W Operating temperature Topr -30 to +95 °C Storage temperature Tstg -55 to +150 °C Monolithic Digital IC 2-phase Brushless Fan Motor Driver Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Oper ating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.

No.6202-2/5 Allowable Operating Ranges at Ta = 25°C Parameter Symbol Conditions Ratings Unit Input current range I CC 6.0 to 50 mA Common mode input voltage range V ICM 0.2 to V IN-1.5 V Electrical Characteristics at Ta = 25°C, ICC = 10mA Ratings Parameter Symbol Conditions min typ max Unit VOLM1 Z1, Z2 open 54 57 60 V Output limiter withstand voltage VOLM2 Z1, Z2 short 31 33 35 V VOsat1 I O = 0.5A 0.95 1.2 V Output saturation voltage VOsat2 I O = 1.0A 1.15 1.5 V VIN voltage V IN I CC = 7.0mA 6.4 6.7 7.0 V Hall input sensitivity (at zero peak) V HN Including offset and hysteresis 20 mV RD output saturation voltage V RDsat I RD = 5mA 0.1 0.3 V CT drain current IC1 C = GND 2.7 3.8 4.9 μA CT discharge current IC2 C = V IN 0.19 0.30 0.41 μA VTH1 0.77 0.8V IN 0.83 V Comp input threshold voltage VTH2 0.42 0.45V IN 0.48 V Thermal protection operating temperature TSD Design target value * 180 °C Thermal protection circuit hysteresis ΔTSD Design target value * 40 °C * Design target value, Do not measurement. Package Dimensions unit : mm (typ) 3098D SANYO : DIP10S(300mil) 9.14 0.95 6.4 7.62 3.2 3.9 MAX 0.51 MIN (3.0) 10 6 0.25 0.48(1.01) 1.78 1.2 Pd max -- Ta Ambient temperature, Ta -- °C Allowable power dissipation, Pd max -- W -30 0 20 40 60 80 1000 0.8 0.6 0.4 0.2 -20 1.0 1.1 0.48

No.6202-3/5 Pin Assignment 1IN− 2IN+ 3CT OUT1 GND VIN RD OUT2 Top view LB1868 Pin Function Pin No. Pin name Function 1 IN − Hall input + pin. Hysteresis amplifier 2 IN + Hall input − pin. Hysteresis amplifier 3 CT Lockup protection time sett ing capacitor pin (0.47 to 4.7μF). 4 OUT1 Output 1 pin. 6 OUT2 Output 2 pin. 5 GND GND pin. 7 Z1 External Zener diode pin (external Zener diode to be connected between power supply and Z1). 8 Z2 Kickback absorption voltage alteration pin (shorted to Z1: 12V operation). 9 RD Lockup detection pin (latch type). 10 V IN Regulated power supply input pin (limiting re sistor to be inserted between power supply and VIN). Truth Table IN+ IN − CT OUT1 OUT2 RD H L L H L L L H L L H L H L H H H H L H H H H H * RD is a latch type output

No.6202-4/5 Block Diagram IN− IN+ CT OUT1 GND VIN RD OUT2 L1 L2 H VCC R1 0.47 to 10μF Thermal shutdown Control block Constant current source Application Circuit Example (1) 12V supply voltage IN− IN+ CT 4 5 OUT1 GND 10 9 VIN RD Z2 Z1 OUT2 LB1868 H 330Ω 2kΩ VCC 12V 0.47μF

PS No.6202-5/5 (2) 24V supply voltage IN− IN+ CT 4 5 OUT1 GND 10 9 VIN RD Z2 Z1 OUT2 LB1868 H 1.2kΩ 2kΩ VCC 24V 0.47μF (3) High-Power Fan (120mm-HH-Speed) IN− IN+ CT 4 5 OUT1 GND 10 9 VIN RD Z2 Z1 OUT2 LB1868 H 2kΩ VCC 12V (24V) 0.47μF 330Ω (1.2kΩ) VZ=12V (24V) ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequentia l or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s techn ical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC productsfor any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, anddistributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture oft h e part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.