BA6406F-E2

DC Brushless Motor Drivers for Cooling Fans Two-phase Full-wave DC Brushless Fan Motor Drivers No.12010EAT03 BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF ●Description This is the summary of models for two-phase half-wave fan motor driver. They incorporate lock protection, automatic restart circuit and FG/AL output. Some of them have variable speed control function, 48V power supply adaptation. ●Feature 1) Power Tr incorporated(BD6701F) 2) Pre-driver(BA6406F、BA6901F、BD6712AF、BA6506F) 3) Variable speed control(BA6901F) 4) Incorporates reverse connection protection diode(BD6701F) 5) Incorporates lock protection and automatic restart circuit 6) Rotation speed pulse signal (FG) output(BD6701F、BA6901F、BD6712AF、BA6506F) 7) Lock alarm signal (AL) output(BD6701F、BA6901F、BD6712AF、BA6406F) ●Applications For desktop PC, server, general consumer equipment, communication equipment and industrial equipment. ●Lineup Two-phase half wave www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Power Tr incorporated 24V power supply BD6701F Pre-driver 24V power supply BA6406F 24V power supply BA6506F 48V power supply BD6712AF 48V power supply BD6712AF 1/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Absolute maximum ratings ◎BD6701FV Parameter Supply voltage Symbol Limit Unit Vcc 36 V Pd Power dissipation ＊ mW 780 Operating temperature range Topr -40～+100 ℃ Storage temperature range Tstg -55～+150 ℃ Iomax 800＊＊ mA AL signal output current IAL 10 mA AL signal output voltage VAL 36 V FG signal output current IFG 10 mA FG signal output voltage VFG 36 V Tjmax 150 ℃ Symbol Limit Unit Vcc 30 V Output current Junction temperature * ** Reduce by 6.24 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board) This value is not to exceed Pd. ◎BA6406F Parameter Supply voltage Power dissipation Pd ＊ mW 624 Operating temperature Topr -40～+100 ℃ Storage temperature Tstg -55～+125 ℃ Iomax 70 mA AL signal output current IAL 8 mA AL signal output voltage VAL 30 V Tjmax 125 ℃ Symbol Limit Unit Vcc 30 V Output current Junction temperature * Reduce by 6.24 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board) ◎BA6506F Parameter Supply voltage Power dissipation Pd ＊ mW 624 Operating temperature Topr -40～+100 ℃ Storage temperature Tstg -55～+125 ℃ Iomax 70 mA FG signal output current IFG 8 mA FG signal output voltage VFG 30 V Tjmax 125 ℃ Output current Junction temperature * Reduce by 6.24 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board) www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 2/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ◎BA6901F Parameter Supply voltage Power dissipation Symbol Limit Unit Vcc 36 V Pd ＊ mW 625 Operating temperature Topr -40～+100 ℃ Storage temperature Tstg -55～+150 ℃ 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 Tjmax 150 ℃ Symbol Limit Unit Supply voltage Pd 780＊ mW Power dissipation Topr -35～+95 ℃ Operating temperature range Tstg -55～+150 ℃ Iomax 40 mA Output current IAL 15 mA AL signal output current VAL 60 V AL signal output voltage Tjmax 150 ℃ Symbol Limit Unit Operating supply voltage range Vcc 6.0～28.0 V Hall input voltage range VH 0～Vcc-3.0 V Symbol Limit Unit Vcc 4.0～28.0 V VH 1.0～Vcc-0.5 V Symbol Limit Unit Junction temperature * Reduce by 5.0 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board) ◎BAD6712AF Parameter Storage temperature range * Reduce by 6.24 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board) ●Operating Conditions ◎BD6701F Parameter ◎BA6406F Parameter Operating supply voltage range Hall input voltage range ◎BA6506F Parameter Operating supply voltage range Hall input voltage range Vcc 4.0～28.0 V VH 1.0～Vcc-0.5 V Symbol Limit Unit ◎BA6901F Parameter Operating supply voltage range Hall input voltage range Vcc 3.5～28.0 V VH 0～Vcc-2.2 V Symbol Limit Unit ◎BD6712AF Parameter Operating supply voltage range Vcc 3.5～Vcz V Hall input voltage range VH 1～30 V FG output voltage range，AL output voltage range VSI 0～48 V Hall input voltage range VH 0～Vcz-1.5 V www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 3/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Electrical Characteristics ◎BD6701FV(Unless otherwise specified Ta=25℃,Vcc=12V) Parameter Circuit current Symbol Min. Limit Typ. Max. Unit Characteristics Conditions Icc 3 6 9 mA Fig.1 Hall input offset voltage VHofs -10 - 10 mV - Hall input hysteresis Vhys ±5 ±10 ±15 mV Fig.2 Output L voltage VOL - 0.30 0.50 V Output leak current IOL - - 100 μA Output zenner voltage VOZ 50 54 58 V Lock detection ON time TON 0.30 0.50 0.70 sec Lock detection OFF time TOFF 3.0 5.0 7.0 sec FG output voltage L VALL - - 0.4 V FG output leak current IALL - - 50 Fig.3 Io=200mA - Vo=45V Clamp current =10mA Fig.4 Fig.5 Fig.6 IFG=5mA Fig.7,8 μA VFG=36V Fig.7,8 - AL output voltage L VFGL - - 0.4 V IAL=5mA AL output leak current IFGL - - 50 μA VAL=36V Min. Limit Typ. Max. ◎BA6406F(Unless otherwise specified Ta=25℃,Vcc=12V) Parameter Circuit current Symbol Unit Conditions At output OFF Characteristics Icc - 3.2 5.0 mA Hall input hysteresis Vhys ±3 - ±15 mV AL output L voltage VALL - - 0.5 V IAL=5mA Fig.12 IAL 8.0 - - mA VAL=2V - ILDC 2.0 3.45 5.25 μA VLD=1.5V Fig.13 ILDD 0.35 0.80 1.45 μA VLD=1.5V Fig.13 rCD 3 4.5 8 - VLDCL 2.2 2.6 3.0 V Fig.14 VLDCP 0.4 0.6 0.8 V Fig.14 VOH 10 10.5 - V Min. Limit Typ. Max. AL current capacity Charge current of capacitor for lock detection Discharge current of capacitor for lock detection Charge-discharge current ratio of capacitor for lock detection Clamp voltage of capacitor for lock detection Comparison voltage of capacitor for lock detection Output H voltage Fig.10 Fig.11 rCD=ILDC/ILDD Io=10mA - Fig.15 ◎BA6506F(Unless otherwise specified Ta=25℃,Vcc=12V) Parameter Circuit current Symbol Unit Conditions At output OFF Characteristics Icc - 3.2 5.0 mA Hall input hysteresis Vhys ±3 - ±15 mV FG output L voltage VALL - - 0.5 V IAL=5mA Fig.18 IAL 8.0 - - mA VAL=2V - ILDC 2.0 3.45 5.25 μA VLD=1.5V Fig.19 ILDD 0.35 0.80 1.45 μA VLD=1.5V Fig.19 rCD 3 4.5 8 - VLDCL 2.2 2.6 3.0 V Fig.20 VLDCP 0.4 0.6 0.8 V Fig.20 VOH 10 10.5 - V FG current capacity Charge current of capacitor for lock detection Discharge current of capacitor for lock detection Charge-discharge current ratio of capacitor for lock detection Clamp voltage of capacitor for lock detection Comparison voltage of capacitor for lock detection Output H voltage www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 4/28 Fig.16 Fig.17 rCD=ILDC/ILDD Io=10mA - Fig.21 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ◎BA6901F(Unless otherwise specified Ta=25℃,Vcc=12V) Parameter Circuit current Hall input hysteresis Charge current of capacitor for lock detection Discharge current of capacitor for lock detection Charge-discharge current ratio of capacitor for lock detection Clamp voltage of capacitor for lock detection Comparison voltage of capacitor for lock detection Min. Limit Typ. Max. Icc 3.0 7.0 12.0 mA Vhys ±4 ±10 ±20 mV Symbol Unit Characteristics Conditions At output OFF Fig.22 Fig.23 ILDC 2.0 5.0 8.0 μA VLD=1.5V ILDD 0.2 0.5 0.8 μA VLD=1.5V rCD 4 10 16 - VLDCL 1.60 2.40 3.20 V VLDCP 0.25 0.60 0.95 V rCD=ILDC/ILDD Fig.24 Fig.24 Fig.25 Fig.25 Output H voltage VOH - 1.5 2.0 V FG output L voltage VFGL - 0.10 0.50 V Io=-10mA Voltage between output and Vcc IFG=5mA AL output L voltage VALL - 0.10 0.50 V IAL,IALB=5mA Fig.28 VofsCS 75.0 92.0 99.5 mV CL=100mV Fig.29 TCS - 50 150 μsec VPWMH 2.0 - - V At output ON Fig.30 At output OFF Fig.30 CL-CS offset voltage Response time for current limit PWM input voltage H PWM input voltage L Charge-discharge pulse comparison voltage Fig.26 Fig.27 - VPWML - - 0.8 V VCRCP 0.26 0.35 0.44 V Charge-discharge pulse output voltage H VTOH 0.7 1.0 1.3 V - Charge-discharge pulse output voltage L ITO=-0.5mA Voltage between output and Vcc VTOL 0.7 1.0 1.3 V ITO=0.5mA - Min. Limit Typ. Max. 5.5 6.0 6.5 - ◎BD6712AF (Unless otherwise specified Ta=25℃,Vcc=5V) Parameter Internal voltage Circuit current1 Symbol Vcz Icc1 0.5 1.5 3.0 Unit V Conditions Icc=10mA mA ＊ ＊＊ Characteristics Fig.31 Circuit current2 Icc2 4 6.7 9.5 mA Hall input hysteresis voltage Vhys 5 15 25 mV - Lock detection ON time TON 0.25 0.5 1 sec Fig.32 Lock detection OFF time TOFF 2.5 5 10 sec Fig.33 Output H voltage VOH Vcc V Io=-10mA Fig.34,35 Output L voltage VOL - 0.2 0.5 V Fig.36,37 VFGL - 0.15 0.5 V Io=10mA IFG=5mA - FG output L voltage Vcc-0. Vcc-0. 5 2 Fig.38,39 FG output leak current IFGL - 0 10 μA VFG=48V AL output L voltage VALL - 0.15 0.5 V IAL=5mA Fig.38,39 AL output leak current IALL - 0 10 μA VAL=48V - * ** H+:3V,H-:2V,Output,FG,AL terminal are open Hall-input is 100Hz square wave. Output is connected with 1kΩto ground. FG and AL are connected with 50kΩto Vcc. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 5/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Truth table ◎BD6701F H+ H- OUT1 OUT2 FG H L H H (Output Tr OFF) L (Output Tr ON) L (Output Tr ON) H (Output Tr OFF) L (Output Tr ON) H (Output Tr OFF) L H+ H- A1 A2 H L L H H (Output Tr ON) L (Output Tr OFF) L (Output Tr OFF) H (Output Tr ON) H+ H- A1 A2 FG H L L H H (Output Tr ON) L (Output Tr OFF) L (Output Tr OFF) H (Output Tr ON) H (Output Tr OFF) L (Output Tr ON) H+ H- PWM A1 A2 FG H L H, OPEN L H H, OPEN H L L L H L H (Output Tr ON) L (Output Tr OFF) L (Output Tr OFF) L (Output Tr OFF) L (Output Tr OFF) H (Output Tr ON) L (Output Tr OFF) L (Output Tr OFF) H (Output Tr OFF) L (Output Tr ON) H (Output Tr OFF) L (Output Tr ON) H+ H- OUT1 OUT2 FG H L H L L H L H ◎BA6406F ◎BA6506F ◎BA6901F ◎BD6712AF www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 6/28 H (Output Tr OFF) L (Output Tr ON) 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Reference Data ◎BD6701F BD6701F Hall input hysteresis, Vhys [mV] 9 6 25℃ -40℃ 3 Operating Voltage Range 0 10 25℃ -40℃ 0 -40℃ -10 25℃ Operating Voltage Range 100℃ 12 18 24 30 0 6 Supply voltage, Vcc [V] 56 100℃ 54 25℃ Operating Voltage Range -40℃ 18 24 30 12 18 0.55 100℃ 0.50 25℃ -40℃ 0.45 24 Operating Voltage Range 6 18 24 100℃ 25℃ 0.10 -40℃ 0.00 2 4 6 100℃ 5.0 25℃ -40℃ 4.5 Operating Voltage Range 0 8 10 FG/AL current, IFG/IAL [mA] Fig.7 FG/AL output L voltage (Temperature characteristics) www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 6 12 18 0.15 6V 0.10 12V 28V 0.05 2 4 6 8 FG/AL current, IFG/IAL [mA] Fig.8 FG/AL output L voltage (Voltage characteristics) 7/28 30 Fig.6 Lock detection OFF time BD6701F 10.0 1.0 0.8 36 0.1 0 24 Supply voltage, Vcc [V] 0.00 0 0.8 5.5 30 BD6701F 0.20 FG/AL low voltage, VFGL/VALL [V] 0.15 0.05 12 Fig.5 Lock detection ON time BD6701F -40℃ BD6701F 6.0 Supply voltage,Vcc [V] Fig.4 Output zenner voltage 0.6 4.0 0 30 0.4 Fig.3 Output L voltage BD6701F Supply voltage, Vcc [V] 0.20 0.2 Output current, Io [mA] Drain current, Ids [A] 6 1 0 0.40 50 FG/AL low voltage, VFGL/VALL [V] 12 0.60 Lock detect ON time, TON [sec] Output zenner voltage, VOZ [V] 58 0 100℃ Fig.2 Hall input hysteresis BD6701F 52 2 Supply voltage, Vcc [V] Fig.1 Circuit current 60 3 0 Lock detect OFF time, TOFF [sec] 6 4 25℃ -20 0 BD6701F 5 100℃ 100℃ Circuit current, Icc [mA] BD6701F 20 Output L voltage, VOL [V] 12 10 0.1 1.0 10.0 100.0 Drain - source voltage, Vds[V] Fig.9 Output Tr ASO (Ton=100msec) 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ◎BA6406F 3 25℃ 2 100℃ 1 Operating Voltage Range 0.8 10 100℃ 25℃ -40℃ 0 -40℃ 25℃ -10 100℃ -20 0 0 6 12 18 24 6 Supply voltage, Vcc [V] Charge/Discharge current, ILDC/ILDD [uA] 100℃ 25℃ -40℃ 2.0 1.0 -40℃ 25℃ 100℃ 0.0 -1.0 0 6 12 18 24 30 Supply voltage, Vcc [V] Fig.13 Charge-discharge current of capacitor for lock detection www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Clamp/Comparate voltage, VLDCL/VLDCP [V] BA6406F 3.0 -40℃ 0.2 12 18 24 30 0 2 6 8 10 Fig.12 AL output L voltage BA6406F 5.0 4 AL current, IAL[mA] Fig.11 Hall input hysteresis Operating Voltage Range 4.0 25℃ 0.4 Supply voltage, Vcc [V] Fig.10 Circuit current 5.0 100℃ 0.6 0.0 0 30 BA6406F 1.0 Operating Voltage Range BA6406F 0.0 100℃ -1.0 4.0 Output voltage, VOH [V] Circuit current, Icc [mA] Hall input hysteresis, Vhys [mV] -40℃ 4 BA6406F 20 AL low voltage, VALL [V] BA6406F 5 3.0 2.0 -40℃ 25℃ 25℃ -40℃ -2.0 -3.0 -4.0 1.0 100℃ -5.0 0.0 0 6 12 18 24 30 Supply voltage, Vcc [V] Fig.14 Clamp-comparison voltage of capacitor for lock detection 8/28 0 20 40 60 80 Output current, Io [mA] Fig.15 Output H voltage 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ◎BA6506F 3 25℃ 2 100℃ 1 Operating Voltage Range 0.8 10 100℃ 25℃ -40℃ 0 -40℃ 25℃ -10 100℃ -20 0 0 6 12 18 24 6 Supply voltage, Vcc [V] Charge/Discharge current, ILDC/ILDD [uA] Clamp/Comparate voltage, VLDCL/VLDCP [V] BA6406F 4.0 100℃ 25℃ -40℃ 2.0 1.0 -40℃ 25℃ 100℃ 0.0 -1.0 0 6 12 -40℃ 0.2 12 18 24 30 0 2 18 24 30 Supply voltage, Vcc [V] Fig.19 Charge-discharge current of capacitor for lock detection www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 6 8 10 Fig.18AL output L voltage BA6406F 5.0 4 AL current, IAL[mA] Fig.17 Hall input hysteresis Operating Voltage Range 3.0 25℃ 0.4 Supply voltage, Vcc [V] Fig.16 Circuit current 5.0 100℃ 0.6 0.0 0 30 BA6406F 1.0 Operating Voltage Range BA6406F 0.0 Operating Voltage Range 100℃ 4.0 -1.0 Output voltage, VOH [V] Circuit current, Icc [mA] Hall input hysteresis, Vhys [mV] -40℃ 4 BA6406F 20 AL low voltage, VALL [V] BA6406F 5 -40℃ 3.0 25℃ 2.0 100℃ -40℃ 25℃ 1.0 25℃ -2.0 -40℃ -3.0 -4.0 100℃ 0.0 -5.0 0 6 12 18 24 30 Supply voltage, Vcc [V] Fig.20 Clamp-comparison voltage of capacitor for lock detection 9/28 0 20 40 60 80 Output current, Io [mA] Fig.21 Output H voltage 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ◎BA6901F -40℃ 6 4 2 Operating Voltage Range 0 100℃ 25℃ 10 -40℃ 0 100℃ 25℃ -10 Operating Voltage Range -40℃ -20 0 6 12 18 24 30 0 6 Supply voltage, Vcc [V] BA6901F 2.0 -40℃ 25℃ 0.0 Operating Voltage Range 100℃ -2.0 0 30 6 12 18 24 30 Supply voltage, Vcc [V] Fig.24 Charge-discharge current of capacitor for lock detection BA6901F 0.0 BA6901F 1.0 100℃ -40℃ 25℃ 3.0 100℃ 2.0 1.0 0.0 -1.0 0.8 -2.0 FG low voltage, VFGL[V] 4.0 Output H voltage, VOH [V] Clamp/Comparate voltage, VLDCL/VLDCP [V] 24 25℃ Fig.23 Hall input hysteresis Operating Voltage Range 25℃ -40℃ -3.0 -4.0 -5.0 0 6 12 18 24 30 20 40 60 0.6 0.4 100℃ 0.2 25℃ -40℃ 0.0 9 25℃ -40℃ 0 3 12 15 AL current, IAL[mA] Fig28 AL Output L voltage www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 6 9 12 15 FG current, IFG[mA] Fig.27 FG Output L voltage BA6901F 2.0 -40℃ 0.8 -40℃ 25℃ 100℃ 0.5 0.3 1.5 25℃ 100℃ 1.0 0.5 Operating Voltage Range Operating Voltage Range 0.0 6 0.2 80 BA6901F 1.0 Offset voltage, VofsCS [mV] 0.8 3 100℃ Fig.26 Output H voltage BA6901F 0 0.4 Output current, Io [mA] Fig.25 Clamp-comparison voltage of capacitor for lock detection 1.0 0.6 0.0 0 Supply voltage, Vcc [V] AL low voltage, VALL [V] 18 100℃ 25℃ -40℃ 4.0 Supply voltage, Vcc [V] Fig.22 Circuit current 5.0 12 BA6901F 6.0 Threshold voltage [V] Circuit current, Icc [mA] Hall input hysteresis, Vhys [mV] 25℃ 8 BA6901F 20 100℃ Charge/Discharge current, ILDC/ILDD [uA] BA6901F 10 0.0 0 6 12 18 24 Supply voltage, Vcc[V] Fig29 CS-CL offset voltage 10/28 30 0 6 12 18 24 30 Supply voltage, Vcc[V] Fig.30 PWM input threshold voltage 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ◎BD6712AF Lock detect ON time, TON [sec] -35℃ 6 25℃ 95℃ 4 2 Operating Voltage Range 0 25℃ 0.3 0.2 Operating Voltage Range 12 18 24 30 -0.2 12 18 24 25℃ -0.4 95℃ -0.6 -0.8 0 10 20 30 -0.2 28V -0.4 12V -0.6 3.5V -0.8 2 Operating Voltage Range 6 12 18 24 30 BD6712AF 1 0.8 0.6 95℃ 25℃ 0.4 -35℃ 0.2 0 0 40 25℃ Fig.33 Lock detection OFF time -1 -1 3 Supply voltage, Vcc [V] BD6712AF 0 Output H voltage, VOH [V] -35℃ -35℃ 0 30 Fig.32 Lock detection ON time BD6712AF 0 6 Supply voltage, Vcc [V] Fig.31 Circuit current 95℃ 4 1 0 Output L voltage, VOL [V] 6 Supply voltage, Vcc [V] Output H voltage, VOH [V] -35℃ 0.1 0 10 20 30 40 0 10 20 30 40 Output current, Io [mA] Output current, Io [mA] Output current, Io [mA] Fig.34 Output H voltage (Temperature characteristics) Fig.35 Output H voltage (Voltage characteristics) Fig.36 Output L voltage (Temperature characteristics) BD6712AF 0.8 3.5V 0.6 12V 0.4 28V 0.2 0 BD6712AF 0.4 FG/AL low voltage, VFGL/VALL [V] 1 Output L voltage, VOL [V] 95℃ 0.4 BD6712AF 5 0.3 95℃ 0.2 25℃ -35℃ 0.1 0 0 10 20 30 40 Output current, Io [mA] Fig.37 Output L voltage (Voltage characteristics) www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. BD6712AF 0.4 FG/AL low voltage, VFGL/VALL [V] Circuit current, Icc [mA] 8 BD6712AF 0.5 Lock detect OFF time, TOFF [sec] BD6712AF 10 0.3 0.2 3.5V 12V 0.1 28V 0 0 2 4 6 8 10 0 2 4 6 8 10 FG/AL current, IFG/IAL [mA] FG/AL current, IFG/IAL [mA] Fig.38 FG/AL output L voltage (Temperature characteristics) Fig.39 FG/AL output L voltage (Voltage characteristics) 11/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Block diagram, application circuit, and pin assignment ◎BD6701F OUT2 1 Connect a pull-up resistor because open collector output is set. GND 8 Lock Detect Auto Restart AL Pre Drive OUT1 2 P.25 7 Set according to the amplitude of hall element output and hall input voltage range. OSC Take a measure against Vcc voltage rise generated by reverse connection of current and back electromotive force. FG H- 3 6 Control P.25 PIN No. Terminal name 1 2 3 4 5 6 7 8 OUT2 AL FG Vcc H+ HOUT1 GND TSD HALL AMP REG Vcc 4 P.22 HALL H+ - + 5 Function Motor output terminal 2 Lock alarm signal output terminal Rotating speed pulse signal output terminal Power terminal Hall input terminal+ Hall input terminalMotor output terminal 1 GND terminal ◎BA6406F Take a measure against Vcc voltage rise generated by reverse connection of current and back electromotive force. Vcc 1 Output Tr is equipped externally. Provide a back electromotive force regenerating current route by Zenner diode for clamping. A2 8 P.25 P.25 Set according to the amplitude of hall element output and hall input voltage range. HALL H+ 2 REG + - P.22 7 LOGIC AL LD 3 6 Connect a pull-up resistor because open collector output is set. H4 P.25 A1 HALL AMP Lock Detect Auto Restart 0.33μF ～4.7μF Lock detection ON time and lock detection OFF time can be set. + - GND + P.17 5 - PIN No. Terminal name 1 2 3 4 5 6 7 8 Vcc H+ AL HGND LD A1 A2 Function Power terminal Hall input terminal + Lock alarm signal output terminal Hall input terminal GND terminal Lock detection and automatic restart capacitor connecting terminal Output terminal 1 Output terminal 2 www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 12/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ◎BA6506F Take a measure against Vcc voltage rise generated by reverse connection of current and back electromotive force. Vcc 1 Output Tr is equipped externally. Provide a back electromotive force regenerating current route by Zenner diode for clamping. A2 8 P.25 P.25 Set according to the amplitude of hall element output and hall input voltage range. HALL H+ 2 REG HALL AMP + - P.22 7 LOGIC FG LD 3 6 Connect a pull-up resistor because open collector output is set. H4 P.25 A1 Lock Detect Auto Restart 0.33μF ～4.7μF Lock detection ON time and lock detection OFF time can be set. + - GND + P.17 5 - PIN No. Terminal name 1 2 3 4 5 6 7 8 Vcc H+ FG HGND LD A1 A2 Function Power terminal Hall input terminal + Rotating speed pulse signal output terminal Hall input terminal GND terminal Lock detection and automatic restart capacitor connecting terminal Output terminal 1 Output terminal 2 www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 13/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ◎BA6901F Incorporates charging and discharging pulse circuit and enables speed control corresponding to ambient temperature with use of thermistor. TOUT CR P.19 + 1 0.1μF ～4.7μF FG Vcc 2 15 AL 3 Lock Detect Auto Restart ALB by 4 P.18 A2 A2 0.47μF ～4.7μF 5 6 A1 A1 13 8 Terminal name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CR FG AL ALB PWM LD CNF GND H+ HCS CL A1 A2 Vcc TOUT + P.20 12 ～5Ω CS - H- - + + - 10 H+ 9 Output current detecting resistor. Pay attention to wattage because large current is present P.20 11 + CNF GND P.20 PIN No. PWM 7 Phase compensating capacitor when current is limited. Current limit setting resistor. CL LD 0.001μF ～0.1μF P.17 P.25 14 PWM Lock detection ON time and lock detection OFF time can be set. Output Tr is equipped externally. Provide a back electromotive force regenerating current route by Zenner diode for clamping. REG P.25 control P.25 16 - LOGIC Incorporates power supply clamp circuit and enables application of high voltage. Enables speed pulse input. Take a measure against Vcc voltage rise generated by reverse connection of current and back electromotive force. 5kΩ ～200kΩ HALL Set according to the amplitude of hall element output and hall input voltage range. P.22 Function Charging and discharging pulse circuit capacitor and resistor connecting terminal Rotating speed pulse signal output terminal Lock alarm signal output terminal Lock alarm signal terminal(inversion signal of AL) PWM input terminal(H or OPEN:Output ON, L:Output OFF) Lock detection and automatic restart capacitor connecting terminal Phase compensating capacitor connecting terminal GND terminal Hall input terminal + Hall input terminal Current detecting input terminal Current limiting input terminal Output terminal 1 Output terminal 2 Power terminal Charging and discharging pulse output terminal www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 14/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ◎BD6712AF Take a measure against Vcc voltage rise generated by reverse connection of current and back electromotive force. P25 Incorporates power supply clamp circuit and enables application of high voltage. 0Ω ～100kΩ Vcc OUT2 1 8 REG P.21 TSD OUT1 H+ HALL 2 Set according to the amplitude of hall element output and hall input voltage range.. + - Control FG AL 3 Connect a pull-up resistor because open collector output is set. P.25 Terminal name 1 2 3 4 5 6 7 8 Vcc H+ AL HGND FG OUT1 OUT2 P.25 HALL AMP P.22 PIN No. 7 Output Tr is equipped externally. Provide a back electromotive force regenerating current route by Zenner diode for clamping Lock Detect Auto Restart 6 H- GND 4 5 Connect a pull-up resistor because open collector output is set. P.25 Function Power terminal Hall input terminal+ Lock alarm signal output terminal Hall input terminal GND terminal Rotating speed pulse signal output terminal Output terminal 1 Output terminal 2 www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 15/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Description of operations Function table BD6701F Lock protection auto restart Incorporated counter CR timer BA6406F BA6506F BA6901F BD6712AF Reference page 〇 P.16 〇 〇 P.17 PWM input 〇 P.18 Variable speed control 〇 Current limit circuit 〇 〇 〇 Supply voltage clamping circuit FG output 〇 AL output 〇 〇 〇 P.18, 19 P.20 〇 P.21 〇 〇 P.25 〇 〇 P.25 1) Lock protection and automatic restart ○Incorporated counter system ＜BD6701F、BD6712AF＞ Motor rotation is detected by hall signal, and lock detection ON time (TON) and lock detection OFF time (TOFF) are set by IC internal counter. Timing chart is shown in Fig.40. H+ TOFF OUT1 TON Output Tr OFF ON OUT2 FG Hi (Open collector) AL Recovers Motor Lock Lock release normal operation locking detection Fig.40 Lock protection (incorporated counter system) timing chart www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 16/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ○CR timer system ＜BA6406F、BA6506F、BA6901F＞ Charging and discharging time at LD terminal depends on the capacitor equipped externally on LD terminal. Charging and discharging time is determined as follows: C×(VLDCL-VLDCP) TON(charging time) = ILDC C×(VLDCL-VLDCP) TOFF(discharging time)= C ＶLDCL ＶLDCP ＩLDC ＩLDD ： ： ： ： ： ILDD Capacity of capacitor equipped externally on LD terminal LD terminal clamping voltage LD terminal comparator voltage LD terminal charging current LD terminal discharging current For reference, charging and discharging time when C = 1.0μF can be calculated as follows(BA6901F); Charging time＝0.36sec(output ON) Discharging time＝3.6sec(output OFF) Timing chart of LD terminal is shown in Fig.41. H- A1 TOFF LD terminal clamping voltage LD Output Tr OFF TON ON LD terminal comparator voltage HIGH(open collector) AL FG Motor Lock locking detection Lock release Recovers normal operation Fig.41 Lock protection (CR timer system) timing chart When the motor is locked with hall input terminal (H-) in Lo status, FG logic is reversed. AL might be high for few hundred ms in turning on. (BA6406F) www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 17/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note 3) PWM terminal ＜BA6901F＞ The signal input to PWM terminal is below L (0.8V or less), output (A1 and A2) turns off. And when it is above H (2.0V or more), output turns on. PWM terminal is pulled up by resistor (30kΩ:typ.) inside IC. When it is open, the output is in operating mode. H+ PWM A1 A2 FG Fig.42 Timing chart in PWM control 4) Charging and discharging pulse circuit compatible with temperature variable speed control ＜BA6901F＞ When an external capacitor and resistor are connected to CR terminal, saw wave is generated by charging and discharging of capacitor corresponding to the cycle of hall signal. Saw wave of CR terminal changes with the external capacitor and resistor. Waveform of CR terminal is output to TOUT by buffer amplifier. CR terminal is variable from VCRCP (0.35V:typ., see the electric characteristics) to Vcc. When CR voltage is above Vcc-VTOH (1V:typ., see the electric characteristics), CR terminal signal is not output to TOUT terminal as shown in Fig.43. Hall input Hall input Vcc-VTOH (typ.：Vcc-1V) CR Vcc-VTOH (typ.：Vcc-1V) VCRCP (typ.：0.35V) CR VCRCP (typ.：0.35V) Vcc-VTOH (typ.：Vcc-1V) TOUT VTOL (typ.：1V) TOUT VTOL (typ.：1V) Fig.43 CR terminal and TOUT terminal timing chart www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 18/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note 5) Variable speed control application ＜BA6901F＞ This is an example of the application which makes the fan motor rotating speed variable corresponding to ambient temperature with thermistor by use of charging and discharging pulse circuit and PWM input. TOUT CR 16 + 1 - Vcc FG 15 2 REG 3 LOGIC AL Lock Detect Auto Restart ALB 4 14 A1 13 A1 CL PWM + - VTH Thermistor 5 12 PWM - LD 6 A2 A2 + CS 11 + - CNF H- 7 10 GND 8 - + + - H+ HALL 9 Fig. 44 Example of temperature variable speed application VTH TOUT PWM A1 A2 Fig. 45 Temperature variable speed timing chart When the temperature becomes the lower and the thermistor terminal voltage the higher, PWM pulse becomes the shorter and speed is reduced as shown in Fig. 45. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 19/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note 6) Current limiting circuit ＜BA6901F＞ Output current limitation can be set by the voltage (VCL) input to CL terminal. Connect a resistor (RNF) for detecting output current between the emitter of external output transistor and GND, and input the voltage generated by resistor to CS terminal, thereby detecting the output current. The output current is limited so that CL terminal and CS terminal has the same potential. There is an offset between CL terminal and CS terminal. Current limiting value can be calculated by the formula below: Current limiting value ＝ VCL－VofsCS RNF VofsCS = CL-CS offset When limiting the output current, capacitor for phase compensation must be connected between CNF terminal and Vcc terminal. When the output current is not to be limited, fix CL terminal voltage to High level (Vcc) and CS terminal to Low level (GND). CNF Vcc CNF Vcc A1 A1 A2 A2 CS CS CL Current limiting CL (a) When current limiting is applied (b) When current limiting is not applied Fig.46 External circuit of output www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 20/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note 7) Power supply voltage clamping circuit ＜BD6712AF＞ When the external supply voltage exceeds supply clamping voltage Vcz (see the electric characteristics), supply clamping turns on. Adjust the capacity of bypass capacitor (C2) so that the transient peak voltage does not exceed the maximum of supply clamping voltage at IC power supply terminal (Vcc). When you use the external supply voltage above supply clamping voltage, insert the limiting resistor (R1) between the external supply and IC supply terminal. Set the limiting resistor (R1) so that Icc does not exceed the operation power supply amperage. Example of calculation for BD6712AF is shown below: External supply voltage ：VS Supply clamping voltage ：Vcz=6V(typ.) Hall current limiting resistor ：R2 Supply current limiting resistor ：R1 Circuit crrent ：Icc Hall element current ：IH ：Vcc Hall element resistance ：RH Supply terminal voltage Then, VS - Vcc Icc + IH R1 = Icc R1 VS 1 Vcc OUT2 C2 IH ・・・① 8 REG R2 TSD 2 H+ + - RH 3 4 Control OUT1 FG AL 7 HALL AMP Lock Detect Auto Restart GND H- 6 5 Fig.47 Example of supply voltage clamping application circuit Assuming R2 = 2kΩ and RH = 0.5kΩ, IH is calculated as follows: Vcc IH = ・・・② R2 + RH = 6V / (2kΩ+0.5kΩ) = 2.4mA Icc has minimum 4mA and maximum 30mA, therefore the minimum and maximum value of R1 is calculated as follows by the formula ①: VS www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. R1 Min. value R1 Max. value 5V 0Ω 0kΩ 24V 550Ω 2.8kΩ 48V 1.3kΩ 6.6kΩ 21/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note 8) Hall input setting Hall input voltage range is shown in operating conditions. Hall input voltage range Vcc Hall input voltage range upper limit Hall input voltage range lower limit GND Fig.48 Hall input voltage range Adjust the hall element bias resistor R1 and R2 in Fig.49 so that the input voltage at hall amplifier is input in "hall input voltage range" including the amplitude of signal. For a model having hall input voltage range lower limit 0V,R2 = 0Ωis acceptable. ○Reduction of noise of hall signal Hall element may be affected by Vcc noise or the like depending on the wiring pattern of board. In this case, place a capacitor like C1 in Fig.49. In addition, when wiring from the hall element output to IC hall input is long, noise may be loaded on wiring. In this case, place a capacitor like C2 in Fig.49. H- H+ Vcc C2 R1 RH R2 C1 Hall element Hall bias current ＝ Vcc / (R1+R2+RH ) Fig.49 Application near of hall signal www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 22/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Equivalent circuit ◎BD6701F 1) Hall input terminal 2) Output terminal OUT1 Vcc OUT2 1kΩ 1kΩ 3 FG output terminal 4) AL output terminal FG AL ◎BA6406F 1) Hall input terminal 2) Output terminal 3)AL signal output terminal Vcc H+ 1kΩ 1kΩ AL H- A1,A2 15kΩ ◎BA6506F 1) Hall input terminal 2) Output terminal 3)FG signal output terminal Vcc H+ 1kΩ 1kΩ FG H- A1,A2 15kΩ www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 23/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF ◎BA6901F 1) Hall input terminal Technical Note 2) Current limiting input terminal Output current detecting terminal 3) Charge-discharge pulse output terminal Vcc Vcc Vcc 30Ω 1kΩ 1kΩ H+ H- 1kΩ CS 4) PWM input terminal 1kΩ 30Ω 1kΩ CL Vcc TOUT 5) Output terminal 6) Signal output terminal FG、AL、ALB Vcc 30kΩ 1kΩ PWM A1, A2 100kΩ 15kΩ GND ◎BD6712AF 1) Hall input terminal 2) Output terminal Vcc Vcc H+ H- OUT1 1kΩ 1kΩ 1kΩ OUT2 1kΩ 3) FG output terminal or AL output terminal 4) Power supply terminal FG or AL Vcc 50kΩ www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 24/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Safety measure 1) Reverse connection protection diode Reverse connection of power results in IC destruction as shown in Fig 50. When reverse connection is possible, reverse connection protection diode must be added between power supply and Vcc. Reverse power connection In normal energization Vcc After reverse connection destruction prevention Vcc Vcc Circuit block Circuit block Each pin GND Internal circuit impedance high  amperage small Circuit block Each pin GND Large current flows  Thermal destruction Each pin GND No destruction Fig.50 Current flow when power is connected reversely ＊As for BD6701F, this diode is built-in in the IC, so a protection diode between power supply -Vcc terminal is unnecessary. 2) About measures of voltage rise by back electromotive force The voltage of output terminal rises by back electromotive force. The diode D1 of Fig.51 is necessary to divide a power supply line of motor with small signal line, so that the voltage of the output does not affect a power supply line. D1 IC Fig.51 Separation of a power supply line The models that incorporate power Tr (BD6701F) have the circuit, which clamps the output voltage so that back electromotive force does not exceed the maximum rating voltage of output Tr. 3) FG, AL output Vcc FG /AL Pull-up resistor Protection resistor R1 Connector of board Fig.52 Protection of FG and AL terminal FG and AL output is an open collector and requires pull-up resistor. The IC can be protected by adding resistor R1. An excess of absolute maximum rating, when FG or AL output terminal is directly connected to power supply, could damage the IC. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 25/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note 4) Problem of GND line PWM switching Do not perform PWM switching of GND line because GND terminal potential cannot be kept to a minimum. Vcc Motor Driver GND Controller PWM input Prohibite Fig.53 GND Line PWM switching prohibited ●Calculation of power consumption by IC Power consumption of this IC is approximately calculated as follows: Pc=Pc1+Pc2+Pc3 ・Pc1：Power consumption by circuit current Pc1=Vcc×Icc ・Pc2：Power consumption on output stage Pc2=VOL×Io VOL is the L voltage of output terminal 1 and 2. Io is the current flowing to output terminal 1 and 2. ・Pc3：Power consumption at FG and AL Pc3=VFG×IFG＋VAL×IAL VFG is L voltage of FG output. VAL is L voltage of AL output. IFG and IAL are the current of FG and AL. Vcc Icc FG IFG OUT1 OUT2 Io Fig.54 Calculation of power consumption by IC Power consumption by IC greatly changes with use condition of IC such as power supply voltage and output current. Consider thermal design so that the maximum power dissipation on IC package is not exceeded. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 26/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Thermal derating curve Power dissipation (total loss) indicates the power that can be consumed by IC at Ta = 25ºC (normal temperature). IC is heated when it consumes power, and the temperature of IC chip becomes higher than ambient temperature. The temperature that can be accepted by IC chip depends on circuit configuration, manufacturing process, etc, and consumable power is limited. Power dissipation is determined by the temperature allowed in IC chip (maximum junction temperature) and thermal resistance of package (heat dissipation capability). The maximum junction temperature is in general equal to the maximum value in the storage temperature range. Heat generated by consumed power of IC is radiated from the mold resin or lead frame of package. The parameter which indicates this heat dissipation capability (hardness of heat release) is called heat resistance, represented by the symbol θja [℃/W]. The temperature of IC inside the package can be estimated by this heat resistance. Fig.55 shows the model of heat resistance of the package. Heat resistance θja, ambient temperature Ta, junction temperature Tj, and power consumption P can be calculated by the equation below: θja ＝ (Tj－Ta) / P [℃/W] Thermal derating curve indicates power that can be consumed by IC with reference to ambient temperature. Power that can be consumed by IC begins to attenuate at certain ambient temperature. This gradient is determined by thermal resistance θja. Thermal resistance θja depends on chip size, power consumption, package ambient temperature, packaging condition, wind velocity, etc., even when the same package is used. Thermal derating curve indicates a reference value measured at a specified condition. Fig.56 shows a thermal derating curve (Value when mounting FR4 glass epoxy board 70 [mm] x 70 [mm] x 1.6 [mm] (copper foil area below 3 [%])) θja = (Tj-Ta) / P [℃/W] Ambient temperature Ta[℃] Chip surface temperature Tj[℃] Power consumption P[W] Fig.55 Thermal resistance Pd(mW) Pd(mW) 800 800 780 700 625 600 560 700 624 600 BA6901F 500 500 400 400 300 300 200 200 100 100 0 25 50 ＊ 75 95 100 125 150 Ta(℃) 0 BD6712AF BA6406F 25 50 BD6701F 75 85 95 100 125 150 Ta(℃) Reduce by 6.24 mW/°C over 25°C.＜BD6701F, BA6406F, BD6712AF＞ Reduce by 5.0 mW/°C over 25°C.＜BA6901F＞ (70.0mm×70.0mm×1.6mm glass epoxy board) Fig.56 Thermal derating curve www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 27/28 2012.03 - Rev.A BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF Technical Note ●Cautions on use 1) Absolute maximum ratings An excess in the absolute maximum rations, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses. 2) Connecting the power supply connector backward Connecting of the power supply in reverse polarity can damage IC. Take precautions when connecting the power supply lines. An external direction diode can be added. 3) Power supply line Back electromotive force causes regenerated current to power supply line, therefore take a measure such as placing a capacitor between power supply and GND for routing regenerated current. And fully ensure that the capacitor characteristics have no problem before determine a capacitor value. (when applying electrolytic capacitors, capacitance characteristic values are reduced at low temperatures) 4) GND potential The potential of GND pin must be minimum potential in all operating conditions. Also ensure that all terminals except GND terminal do not fall below GND voltage including transient characteristics. However, it is possible that the motor output terminal may deflect below GND because of influence by back electromotive force of motor. Malfunction may possibly occur depending on use condition, environment, and property of individual motor. Please make fully confirmation that no problem is found on operation of IC. 5) Thermal design Use a thermal design that allows for a sufficient margin in light of the power dissipation(Pd) in actual operating conditions. 6) Inter-pin shorts and mounting errors Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any connection error or if pins are shorted together. 7) Actions in strong electromagnetic field Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction. 8) ASO When using the IC, set the output transistor so that it does not exceed absolute maximum rations or ASO. 9) Thermal shut down circuit(＊1) The IC incorporates a built-in thermal shutdown circuit (TSD circuit). Operation temperature is 175℃(typ.) and has a hysteresis width of 25℃(typ.). When IC chip temperature rises and TSD circuit works, the output terminal becomes an open state. TSD circuit is designed only to shut the IC off to prevent thermal runaway. It is not designed to protect the IC or guarantee its operation. Do not continue to use the IC after operation this circuit or use the IC in an environment where the operation of this circuit is assumed. (＊1:BA6406F does not incorporate TSD circuit.) 10) Testing on application boards When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress. Always discharge capacitors after each process or step. Always turn the IC’s power supply off before connecting it to or removing it from a jig or fixture during the inspection process. Ground the IC during assembly steps as an antistatic measure. Use similar precaution when transporting or storing the IC. 11) GND wiring pattern When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns, placing a single ground point at the ground potential of application so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to change the GND wiring pattern of any external components, either. 12) Capacitor between output and GND When a large capacitor is connected between output and GND, if Vcc is shorted with 0V or GND for some cause, it is possible that the current charged in the capacitor may flow into the output resulting in destruction. Keep the capacitor between output and GND below 100uF. 13) IC terminal input When Vcc voltage is not applied to IC, do not apply voltage to each input terminal. When voltage above Vcc or below GND is applied to the input terminal, parasitic element is actuated due to the structure of IC. Operation of parasitic element causes mutual interference between circuits, resulting in malfunction as well as destruction in the last. Do not use in a manner where parasitic element is actuated. 14) In use We are sure that the example of application circuit is preferable, but please check the character further more in application to a part which requires high precision. In using the unit with external circuit constant changed, consider the variation of externally equipped parts and our IC including not only static character but also transient character and allow sufficient margin in determining. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 28/28 2012.03 - Rev.A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. 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Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. R1120A