Datasheet DC Brushless Motor Drivers for Cooling Fans Two-Phase Half-Wave Pre Driver Fan Motor Driver BA6406F General description Package W (Typ.) x D (Typ.) x H (Max.) BA6406F is two-phase half-wave fan motor pre-driver. SOP8 5.00mm x 6.20mm x 1.71mm This driver incorporates lock protection, automatic restart circuit and Lock alarm signal output. Features Incorporates lock protection Automatic restart circuit Lock alarm signal (AL) output SOP8 Application For desktop PC, server, general consumer equipment, communication equipment and industrial equipment. Absolute maximum ratings Parameter Symbol Limit Unit Supply voltage Vcc 30 V *1 Power dissipation Pd 624 mW Operating temperature Topr 40 to +100 C Storage temperature Tstg 55 to +125 C Output current Iomax 70 mA AL signal output current IAL 8 mA AL signal output voltage VAL 30 V Junction temperature Tjmax 125 C *1 Reduce by 6.24mW/C over Ta=25C. (On 70.0mm70.0mm1.6mm glass epoxy board) Recommended operating conditions Parameter Symbol Limit Unit Operating supply voltage range Vcc 4.0 to 28.0 V Hall input voltage range VH 1.0 to Vcc-0.5 V Product structure Silicon monolithic integrated circuit This product is not designed protection against radioactive rays www.rohm.com TSZ02201-0H1H0B100480-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/12 TSZ22111 14 001 18.DEC.2012 Rev.002DatasheetDatasheet BA6406F Pin configuration Pin description P/No. T/Name Function Power terminal (TOP VIEW) 1 Vcc Hall input terminal + H+ 2 VCC 1 8 A2 Lock alarm signal output terminal AL 3 Hall input terminal - H- 4 H+ 2 7 A1 GND terminal 5 GND Lock detection and automatic restart AL 3 6 LD 6 LD capacitor connecting terminal Output terminal 1 7 A1 H- 4 5 GND Output terminal 2 A2 8 Fig.1 Pin configuration Block diagram Vcc A2 1 8 REG A1 H+ HALL 2 7 AMP + LOGIC - AL LD 3 6 Lock + Detect Auto - GND H- Restart 4 5 + - Fig.2 Block diagram I/O truth table H+ H- A1 A2 H(Output Tr ON) L(Output Tr OFF) H L L(Output Tr OFF) H(Output Tr ON) L H H High, L Low, Hi-Z High impedance FG output is open-drain type. Motor state AL Rotating L Locking Hi-Z L Low, Hi-Z High impedance AL output is open-drain type. Product structure Silicon monolithic integrated circuit This product is not designed protection against radioactive rays www.rohm.com TSZ02201-0H1H0B100480-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/12 TSZ22111 14 001 18.DEC.2012 Rev.002