Datasheet DC Brushless Fan Motor Driver Standard Single-phase Full wave Fan motor driver BD6968FVM Description This is the summary of application for BD6968FVM. BD6968FVM can drive FAN motor silently by BTL soft switching, and it can control rotational speed by direct PWM and DC voltage speed control. Features Package(s) W(Typ.) x D(Typ.) x H(Max.) Small package (MSOP10) MSOP10 2.90mm x 4.00mm x 0.90mm BTL soft switching drive PWM speed control Direct PWM and DC voltage control available Low duty start up function Quick start function Constant voltage output for hall element Lock protection and auto restart (without external capacitor) Lock alarm signal (AL) outputt Applications PC, PC peripheral component (Power supply, VGA card, case FAN etc.) MSOP10 BD player, Projector etc. Absolute maximum ratings Symbol Limit Unit Parameter Supply voltage Vcc 15 V Power dissipation Pd 585* mW Operating temperature Topr -40 to +105 Storage temperature Tstg -55 to +150 Output voltage Vomax 15 V Output current Iomax 800** mA Hall input terminal voltage Vhall 7 V PWM terminal voltage Vpwm 7 V AL signal output voltage Val 15 V AL signal output current Ial 10 mA HB output current Ihb 10 mA REF output current Iref 10 mA Junction temperature Tjmax 150 * Reduce by 4.68mW/ over Ta=25C(On 70mm70mm1.6mm glass epoxy board) ** This value is not to exceed Pd Operating conditions Unit Parameter Symbol Limit Vcc V Operating supply voltage range 3.3 to 14 Vh V Hall input voltage range 0.4 to Vcc/3 Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays .w ww.rohm.com TSZ02201-0H1H0B100050-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/12 TSZ2211114001 21.Mar.2013 Rev.002Datasheet BD6968FVM Electrical characteristics(Unless otherwise specified Ta=25,Vcc=12V) Limit Symbol Parameter Unit Conditions Characteristics Min. Typ. Max. 3 5 7 Fig.1 Circuit current Icc mA 2.6 2.8 3.0 Iref=-3mA Fig.2 REF voltage Vref V 1.1 1.2 1.3 Ihb=-3mA Fig.2 Hall bias voltage Vhb V 0 - 6 - Hall input offset Vofs mV 53 55 57 - Input-output Gain Gio dB Io=200mA Fig.3 to 6 0.20 0.45 0.70 Output voltage Vo V Upper and Lower total - 2.7 - 7.0 direct PWM input condition PWM input H level Vpwmh V - -0.3 - 0.4 direct PWM input condition PWM input L level Vpwml V - 2 - 88 direct PWM input condition PWM input frequency Fpwm kHz - -5.0 -0.1 - A PWM terminal bias current Ipwm Fig.7 2.3 2.5 2.7 OSC H voltage Vosch V * Fig.7 0.4 0.5 0.6 OSC L voltage Voscl V * PWM drive frequency at Fig.8 44 66 88 kHz OSC frequency Fosc DC voltage input mode Output PWM Duty 1 50 60 70 Vpwm=1.9V - Duty1 % Output PWM Duty 2 20 30 40 Vpwm=1.3V - Duty2 % AL L voltage Fig.9,10 - 0.2 0.4 Ial=5mA Vall V AL leak current 0 - 5 Val=15V - A Iall Lock detection ON time 0.35 0.5 0.65 Fig.11 Ton s Lock detection OFF time Fig.12 3.5 5.0 6.5 Toff s * Peak voltage of triangular wave (OSC) inside IC Terminal name PIN No. Terminal name Function 1 GND GND 2 OUT2 Motor output 2 3 H+ Hall input + 4 HB Constant voltage output for hall element 5 H- Hall input - 6 AL Lock alarm signal output 7 PWM Control signal input (PWM or DC voltage) 8 REF Reference voltage output 9 Vcc Power supply terminal 10 OUT1 Motor output 1 Truth table H+ H- PWM OUT1 OUT2 H L H H L L H H L H AL normal operation :L(output is ON) H L L L L lock detection :H(output is OFF) L H L L L www.rohm.com TSZ02201-0H1H0B100050-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/12 TSZ2211115001 21.Mar.2013 Rev.002