BA6901F-E2 ROHM

Datasheet DC Brushless Motor Drivers for Cooling Fans Two-phase Full-wave DC Brushless Fan Motor Drivers BA6901F General description Package W (Typ.) x D (Typ.) x H (Max.) BA6901F is two-phase half-wave fan motor driver. They SOP-16 10.00mm x 6.20mm x 1.71mm incorporate lock protection, automatic restart circuit and FG/AL output. Some of them have variable speed control function. Features Current Limit circuit PWM control (PWM pulse signal input) Incorporates lock protection and automatic restart circuit Lock alarm signal(AL) output Rotation speed pulse signal (FG) output SOP16 Application For desktop PC, server, general consumer equipment, communication equipment and industrial equipment. Absolute maximum ratings Parameter Symbol Limit Unit Supply voltage Vcc 36 V Power dissipation Pd 625* mW Operating temperature Topr -40+1 00 Storage temperature Tstg -55+1 50 Output current Iomax 70 mA FG signal output current Ifg 15 mA FG signal output voltage Vfg 36 V AL signal output current Ial 15 mA AL signal output voltage Val 36 V Junction temperature Tjmax 150 * Reduce by 5.0mW/C over Ta=25C. (On 70.0mm70.0mm1.6mm glass epoxy board) Recommended operating conditions Parameter Symbol Limit Unit Operating supply voltage range Vcc 3.528.0 V Hall input voltage range VH 0Vcc-2.2 V Product structure Silicon monolithic integrated circuit This product is not designed protection against radioactive rays . www.rohm.com TSZ02201-0H1H0B100500-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/17 TSZ22111 14 001 18.DEC.2012 Rev.002LOG I C DatasheetDatasheet BA6901F Pin configuration Pin description P/No. T/Name Function Charging and discharging (TOP VIEW) 1 CR pulse circuit capacitor and resistor connecting terminal CR 1 16 TOUT Rotating speed pulse signal 2 FG output terminal FG 2 15 Vcc Lock alarm signal output terminal AL 3 Lock alarm signal terminal AL 3 14 A2 ALB 4 (inversion signal of AL) PWM input terminal ALB 4 13 A1 PWM (H or OPEN:Output ON, L:Output 5 OFF) PWM 5 12 CL Lock detection and automatic LD 6 restart capacitor connecting terminal LD 6 11 CS Phase compensating capacitor CNF 7 connecting terminal CNF 7 10 H GND terminal GND 8 Hall input terminal + H+ 9 GND H+ 8 9 Hall input terminal - 10 H- Current detecting input terminal CS 11 Fig. 1 Pin configuration Current limiting input terminal CL 12 Output terminal 1 A1 13 Output terminal 2 14 A2 Power terminal Vcc 15 Charging and discharging TOUT 16 pulse output terminal Block diagram CR TOUT + 1 16 - FG Vcc 2 15 REG A2 AL A2 3 14 LOCK ALB DETECTION A1 & A1 4 AUTOMATIC 13 RESTART PWM CL PWM 5 12 - LD + CS + 6 11 - CNF H- 7 10 - + GND + H+ - 8 9 Fig.2 Block diagram www.rohm.com TSZ02201-0H1H0B100500-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/17 TSZ22111 15 001 18.DEC.2012 Rev.002