Datasheet DC Brushless Fan Motor Driver Multifunction Single-phase Full-wave Fan Motor Driver BD61251FV General Description BD61251FV is pre-driver IC to drive single phase H Key Specifications bridge output composed of external MOS FET. Operating Voltage Range: 4.5V to 16V It incorporates various functions such as speed Operating Temperature Range: -40C to +105C controllable by PWM, PWM soft switching, Input / output duty slope adjustment. Features Package W (Typ) x D (Typ) x H (Max) Pre Driver for External Power MOS FET SSOP-B16 5.00mm x 6.40mm x 1.35mm Speed Controllable by PWM Input / Output Duty Slope Adjustment Silent Drive by the PWM Soft Switching Lead Angle Function (Fixed value) Soft Start Standby Mode Current Limit Lock Protection and Automatic Restart Rotation Speed Pulse Signal(FG) Applications SSOP-B16 General consumer equipment of Desktop PC, Server, etc. Office equipment, Copier, FAX, Laser Printer, etc. Typical Application Circuits 5V (Typ) VCC OSC PWM PWM ( ) I/O PWM A1H A2H REF OUT1 M OUT2 VOLTAGE A1L REGULATOR A2L PRE- CONTROL DRIVE LOGIC A2H HP HALL + COMP HM A2L - SSW CS + COMP SST - A/D CONVERTER ADJ TSD FG ( ) SIG SLP GND Figure 1. Application of Direct PWM Input Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0H1H0B102100-1-2 2017 ROHM Co., Ltd. All rights reserved. 1/24 TSZ2211114001 12.Oct.2017 Rev.001DatasheetDatasheet BD61251FV Pin Configuration Block Diagram (TOP VIEW) 5V (Typ) VCC A1H 1 16 A2H OSC PWM A1L 2 15 A2L I/O PWM A1H VCC 3 14 CS REF VOLTAGE A1L REGULATOR FG 4 13 GND PRE- CONTROL DRIVE LOGIC A2H PWM 5 12 SSW HP + COMP HM A2L HP 6 11 SST - HM 7 10 ADJ SSW CS + COMP REF 8 9 SLP SST - A/D CONVERTER ADJ TSD FG SLP GND Pin Description Pin No. Pin Name Function 1 A1H High side output 1 2 A1L Low side output 1 3 VCC Power supply 4 FG Speed pulse signal output 5 PWM PWM signal input 6 HP Hall signal input + 7 HM Hall signal input - 8 REF Reference voltage output 9 SLP Input-output duty slope setting 10 ADJ Output duty correction 11 SST Soft start time setting 12 SSW Soft switching angle setting 13 GND GND 14 CS Current sensing 15 A2L Low side output 2 16 A2H High side output 2 www.rohm.com TSZ02201-0H1H0B102100-1-2 2/24 2017 ROHM Co., Ltd. All rights reserved. 12.Oct.2017 Rev.001 TSZ2211115001