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| For brush motors Reversible motor drivers (1A series) BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Overview The reversible motor driver for output 1.0A for 1 motor can set the output modes to four modes, normal, reverse, stop (idling), and braking in accordance with logic input (2 inputs). No.09008EAT02 Features 1) Built-in surge absorption diode 2) By built-in power save circuit, current consumption when a motor stops (idles) can be suppressed 3) Output voltage can be optionally set by reference voltage setting pin 4) Built-in thermal shutdown circuit (TSD) Applications Audio-visual equipment; PC peripherals; Car audios; Car navigation systems; OA equipments Absolute maximum ratings (Ta=25C, All voltages are with respect to ground) Parameter Supply voltage Supply voltage Output current Operating temperature Storage temperature Power dissipation Junction temperature *1 *2 *3 *4 *5 Symbol VCC VM IOMAX TOPR TSTG Pd Tjmax Ratings BA6956AN 18 18 1* 1 BA6287F 18 18 1* 1 BA6285FS 18 18 1* 1 BA6285AFP-Y 30 30 1* 1 BA6920FP-Y 36 36 1* 1 Unit V V A C C W C -20 ~ 75 -55 ~ 150 1.19* 150 2 -20 ~ 75 -55 ~ 150 0.689* 150 3 -20 ~ 75 -55 ~ 150 0.813* 150 4 -40 ~ 85 -55 ~ 150 1.45* 150 5 -30 ~ 85 -55 ~ 150 1.45* 150 5 Do not, exceed Pd or ASO. SIP9 package. Derated at 9.5mW/C above 25C. SOP8 package. Mounted on a 70mm x 70mm x 1.6mm FR4 glass-epoxy board with less than 3% copper foil. Derated at 5.52mW/C above 25C. SSOP-A16 package. Mounted on a 70mm x 70mm x 1.6mm FR4 glass-epoxy board with less than 3% copper foil. Derated at 6.5mW/C above 25C. HSOP25 package. Mounted on a 70mm x 70mm x 1.6mm FR4 glass-epoxy board with less than 3% copper foil. Derated at 11.6mW/C above 25C. Operating conditions (Ta=25C) Parameter Supply voltage Supply voltage VREF voltage Symbol VCC VM VREF Ratings BA6956AN 6.5 ~ 15 6.5 ~ 15 < VCC, VM BA6287F 4.5 ~ 15 4.5 ~ 15 < VCC, VM BA6285FS 4.5 ~ 15 4.5 ~ 15 < VCC, VM BA6285AFP-Y 4.5 ~ 24 4.5 ~ 24 < VCC, VM BA6920FP-Y 6.5 ~ 34 6.5 ~ 34 < VCC, VM Unit V V V www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 1/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Electrical characteristics (BA6956AN, unless otherwise specified, Ta=25C and VCC=9V, VM=9V) Parameter Supply current 1 Supply current 2 Supply current 3 Input threshold voltage H Input threshold voltage L Input bias current Output saturation voltage VREF bias current Symbol ICC1 ICC2 ICC3 VIH VIL IIH VCE IREF Limits Min. 2.0 0 50 Typ. 29 56 0 90 1.7 10 Max. 44 80 15 VCC 0.8 131 2.3 25 Unit mA mA A V V A V A VIN=2V Technical Note Conditions FWD/REV mode Brake mode Standby mode IO=0.2A, vertically total IO=0.2A, VREF=6V Electrical characteristics (BA6287F, unless otherwise specified, Ta=25C and VCC=9V, VM=9V, VREF=9V) Parameter Supply current 1 Supply current 2 Standby current Input threshold voltage H Input threshold voltage L Input bias current Output saturation voltage VREF bias current Symbol ICC1 ICC2 IST VIH VIL IIH VCE IREF Limits Min. 12 29 2.0 0 45 6 Typ. 24 48 0 90 1.0 12 Max. 36 67 15 VCC 0.8 135 1.5 18 Unit mA mA A V V A V mA VIN=2V IO=0.2A, vertically total IO=0.2A, FWD or REV mode Conditions FWD/REV mode Brake mode Standby mode Electrical characteristics (BA6285FS, unless otherwise specified, Ta=25C and VCC=9V, VM=9V, VREF=9V) Parameter Supply current 1 Supply current 2 Standby current Input threshold voltage H Input threshold voltage L Input bias current Power save on voltage Power save off voltage Output saturation voltage VREF bias current Symbol ICC1 ICC2 IST VIH VIL IIH VPSON VPSOFF VCE IREF Limits Min. 12 29 2.0 0 45 2.0 0 6 Typ. 24 48 0 90 1.0 12 Max. 36 67 15 VCC 0.8 135 VCC 0.8 1.5 18 Unit mA mA A V V A V V V mA VIN=2V Standby mode Operation IO=0.2A, vertically total IO=0.2A, FWD or REV mode Conditions FWD/REV mode Brake mode Standby mode www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 2/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Technical Note Electrical characteristics (BA6285AFP-Y, unless otherwise specified, Ta=25C and VCC=9V, VM=9V, VREF=9V) Parameter Supply current 1 Supply current 2 Standby current Input threshold voltage H Input threshold voltage L Input bias current Power save on voltage Power save off voltage Output saturation voltage VREF bias current Symbol ICC1 ICC2 IST VIH VIL IIH VPSON VPSOFF VCE IREF Limits Min. 10 21 2.0 0 40 2.0 9 Typ. 20 42 0 80 1.0 15 Max. 30 63 15 VCC 0.8 120 0.8 VCC 1.5 21 Unit mA mA A V V A V V V mA VIN=2V Operation Standby mode IO=0.2A, vertically total IO=0.2A, FWD or REV mode Conditions FWD/REV mode Brake mode Standby mode Electrical characteristics (BA6920FP-Y, unless otherwise specified, Ta=25C and VCC=12V, VM=12V) Parameter Supply current 1 Supply current 2 Standby current Input threshold voltage H Input threshold voltage L Input bias current Power save on voltage Power save off voltage Output saturation voltage VREF bias current Symbol ICC1 ICC2 IST VIH VIL IIH VPSON VPSOFF VCE IREF Limits Min. 5 3 3.0 0 100 2.0 Typ. 8 5 0 200 2.2 12 Max. 12 8 15 VCC 0.8 300 VCC 0.8 3.3 35 Unit mA mA A V V A V V V A VIN=3V Standby mode Operation IO=0.2A, vertically total IO=0.1A, VREF=6V Conditions FWD/REV mode Brake mode Standby mode www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 3/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Electrical characteristic curves (Reference data) 40 80 30 Technical Note Circuit Current: Icc2 [mA] _ 35 70 Circuit Current: Icc1 [mA] _ Supply Current: Icc1 [mA]_ 25 30 60 20 25 -20C 25C 75C 50 -20C 25C 75C 15 -20C 25C 75C 20 6 9 12 15 Supply Voltage: Vcc [V] 40 6 9 12 15 Supply Voltage: Vcc [V] 10 4 8 12 16 Supply Voltage: Vcc [V] Fig.1 Supply current 1 (forward) (BA6956AN) 60 40 Fig.2 Supply current 2 (brake) (BA6956AN) Fig.3 Supply current 1 (forward) (BA6287F) 60 Circuit Current: Icc1 [mA] _ Supply Current: Icc2 [mA]_ 55 35 Supply Current: Icc2 [mA]_ -20C 25C 75C 55 50 30 50 45 -20C 25C 75C 25 45 -25C 25C 75C 40 4 8 12 16 Supply Voltage: Vcc [V] 20 6 9 12 15 Supply Voltage: Vcc [V] 40 6 9 12 15 Supply Voltage: Vcc [V] Fig.4 Supply current 2 (brake) (BA6287F) 35 -40C 25C 85C 70 Fig.5 Supply current 1 (forward) (BA6285FS) 8 -40C 25C 85C Fig.6 Supply current 2 (brake) (BA6285FS) Circuit Current: Icc1 [mA] _ Circuit Current: Icc2 [mA] _ 30 Circuit Current: Icc1 [mA] _ 60 6 -30C 25C 85C 50 25 40 4 20 30 15 4 8 12 16 20 24 Supply Voltage: Vcc [V] 20 4 8 12 16 20 24 Supply Voltage: Vcc [V] 2 6 12 18 24 30 36 Supply Voltage: Vcc [V] Fig.7 Supply current 1 (forward) (BA6285AFP-Y) 12 Output High Voltage: VOH [V] _ 8.5 Fig.8 Supply current 2 (brake) (BA6285AFP-Y) 75C 25C -20C 8.0 Fig.9 Supply current 1 (forward) (BA6920FP-Y) 9.0 Output High Voltage: VOH [V] _ 75C 25C -20C 8.5 Circuit Current: Icc2 [mA] _ 10 8 7.5 8.0 6 -30C 25C 85C 6 12 18 24 30 36 4 Supply Voltage: Vcc [V] 7.0 0 0.2 0.4 0.6 0.8 1 Output Current: Iout [A] 7.5 0 0.2 0.4 0.6 0.8 1 Output Current: Iout [A] Fig.10 Supply current 2 (brake) (BA6920FP-Y) www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. Fig.11 Output high voltage (BA6956AN) Fig.12 Output high voltage (BA6287F) 4/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Electrical characteristic curves (Reference data) - Continued 9.0 Output High Voltage: VOH [V] _ Output High Voltage: VOH [V] _ 75C 25C -20C 8.5 9.0 Output High Voltage: VOH [V] _ 85C 25C -40C 8.5 9.0 Technical Note 8.5 85C 25C -30C 8.0 8.0 8.0 7.5 7.5 0 0.2 0.4 0.6 0.8 1 Output Current: Iout [A] 7.5 0 0.2 0.4 0.6 0.8 1 Output Current: Iout [A] 7.0 0 0.2 0.4 0.6 0.8 1 Output Current: Iout [A] Fig.13 Output high voltage (BA6285FS) 1.0 75C 25C -20C 1.0 Fig.14 Output high voltage (BA6285AFP-Y) 1.0 Fig.15 Output high voltage (BA6920FP-Y) Output Low Voltage: VOL [V] _ Output Low Voltage: VOL [V] _ 0.8 0.8 Output Low Voltage: VOL [V] _ 0.8 0.6 0.6 0.6 0.4 0.4 75C 25C -20C 0 0.2 0.4 0.6 0.8 1 0.4 75C 25C -20C 0 0.2 0.4 0.6 0.8 1 0.2 0.2 0.2 0.0 0 0.2 0.4 0.6 0.8 1 Output Current: Iout [A] 0.0 Output Current: Iout [A] 0.0 Output Current: Iout [A] Fig.16 Output low voltage (BA6956AN) 1.0 85C 25C -40C 1.5 Fig.17 Output low voltage (BA6287F) 1.5 Fig.18 Output low voltage (BA6285FS) i) Package only Output Low Voltage: VOL [V] _ 0.8 Output Low Voltage: VOL [V] _ i) 1.19W 1.2 1.0 Pd [W] 0.5 0.6 0.9 0.4 0.6 85C 25C -30C 0.2 0.3 0.0 0 0.2 0.4 0.6 0.8 1 Output Current: Iout [A] 0.0 0 0.2 0.4 0.6 0.8 1 Output Current: Iout [A] 0.0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE [C] Fig.19 Output low voltage (BA6285AFP-Y) 1.5 ii) Mounted on ROHM standard PCB (70mm x 70mm x 1.6mm FR4 glass -epox y board) Fig.20 Output low voltage (BA6920FP-Y) 1.5 ii) Mounted on ROHM standard PCB (70mm x 70mm x 1.6mm FR4 glas s-epox y board) Fig.21 Thermal derating curve (SIP9) 3 ii) Mounted on ROHM standard PCB (70mm x 70mm x 1.6mm FR4 glas s -epoxy board) i) Package only i) Package only i) Package only 1.0 Pd [W] Pd [W] 1.0 ii) 0.813W 2 Pd [W] ii)1.45W ii) 0.689W 0.5 i) 0.563W 0.5 i) 0.625W 1 i)0.85W 0.0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE [C] 0.0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE [C] 0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE [C] Fig.22 Thermal derating curve (SOP8) www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. Fig.23 Thermal derating curve (SSOP-A16) Fig.24 Thermal derating curve (HSOP25) 5/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Block diagram and pin configuration BA6956AN Technical Note VM 5 TSD VCC 6 R1 FIN VCC R2 VREF R3 RIN C1 7 CTRL 9 1 RNF 3 8 GND 4 OUT1 M C2 C3 2 OUT2 Fig.25 BA6956AN Table 1 BA6956AN Pin 1 2 3 4 5 6 7 8 9 Name VREF OUT2 RNF OUT1 VM VCC FIN GND RIN Function Reference voltage setting pin Driver output Power ground Driver output VM FIN GND VREF OUT2 Power supply (driver stage) Power supply (small signal) Control input (forward) GND Control input (reverse) Fig.26 BA6956AN (SIP9) www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. OUT1 VCC RNF 6/15 RIN 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Block diagram and pin configuration BA6287F VCC R1 VM VCC C1 Technical Note 2 3 TSD 6 VREF R2 ZD FIN RIN 4 CTRL 5 8 1 OUT1 M C2 C3 7 OUT2 GND Fig.27 BA6287F Table 2 BA6287F Pin 1 2 3 4 5 6 7 8 Name OUT1 VM VCC FIN RIN VREF OUT2 GND Function Driver output Power supply (driver stage) Power supply (small signal) Control input (forward) Control input (reverse) Reference voltage setting pin Driver output GND Fig.28 BA6287F (SOP8) OUT1 VM VCC FIN GND OUT2 VREF RIN www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 7/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Block diagram and pin configuration BA6285FS VCC R1 VM VCC C1 FIN 6 CTRL Technical Note 4 5 TSD 12 VREF R2 ZD RIN 11 SAVE POWER 8 16 1 GND 3 OUT1 M C2 C3 14 OUT2 RNF Fig.29 BA6285FS Table 3 BA6285FS Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name GND NC OUT1 VM VCC FIN NC PS NC NC RIN VREF NC OUT2 NC RNF GND NC Driver output Power supply (driver stage) Power supply (small signal) Control input (forward) NC Power save enable pin NC NC Control input (reverse) Reference voltage setting pin NC Driver output NC Power ground GND NC OUT1 VM VCC FIN NC PS RNF NC OUT2 NC VREF RIN NC NC Function Fig.30 BA6285FS (SSOP-A16) www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 8/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Block diagram and pin configuration BA6285AFP-Y VCC R1 VM VCC C1 FIN 18 RIN 20 POWER 19 SAVE 6 FIN GND 7 8 GND 9 OUT1 M C2 C3 5 OUT2 RNF CTRL Technical Note 16 17 TSD 21 VREF R2 ZD Fig.31 BA6285AFP-Y Table 4 BA6285AFP-Y Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 FIN Name NC NC NC NC OUT2 RNF GND GND OUT1 NC NC NC NC NC NC VM VCC FIN PS RIN VREF NC NC NC NC GND NC NC NC NC Driver output Power ground GND GND Driver output NC NC NC NC NC NC Power supply (driver stage) Power supply (small signal) Control input (forward) Power save enable pin Control input (reverse) Reference voltage setting pin NC NC NC NC GND NC NC NC NC OUT2 RNF GND GND GND OUT1 NC NC NC NC NC NC NC NC VREF RIN GND PS FIN VCC VM NC NC Function Fig.32 BA6285AFP-Y (HSOP25) www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 9/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Block diagram and pin configuration BA6920FP-Y Technical Note 16 TSD 17 VM VCC R1 C1 FIN 18 R2 RIN 20 POWER 19 SAVE 6 FIN GND 8 9 5 M C2 C3 RNF CTRL 21 VREF R3 OUT1 OUT2 Fig.33 BA6920FP-Y Table 5 BA6920FP-Y Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 FIN Name NC NC NC NC OUT2 RNF NC GND OUT1 NC NC NC NC NC NC VM VCC FIN PS RIN VREF NC NC NC NC GND NC NC NC NC Driver output Power ground NC GND Driver output NC NC NC NC NC NC Power supply (driver stage) Power supply (small signal) Control input (forward) Power save enable pin Control input (reverse) Reference voltage setting pin NC NC NC NC GND NC NC NC NC OUT2 RNF GND NC GND OUT1 NC NC NC NC NC NC NC NC VREF RIN GND PS FIN VCC VM NC NC Function Fig.34 BA6920FP-Y (HSOP25) www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 10/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y External application components Technical Note 1) Resistor for the current limitation, R1 This is a current limiting resistor for collector loss reduction and at the time of short-circuited output. It depends on the power supply voltage used, etc., but choose resistance of about 5 to 10. In addition, set resistance with utmost care to voltage drop caused by inrush current that flows when the motor is started. 2) Resistors and zener diode for the output high voltage setting, R2, R3 and ZD These are the resistors and zener diode used when output high voltage is set. As for the voltage, only ( VSAT + VF ) lower than the VREF pin voltage for BA6287F, BA6285FS and BA6285AFP-Y. (Reference values; VSAT 0.25V, VF 0.75V) Zener diode ZD is recommended to be used instead of resistor R3 when the power supply voltage is unstable for BA6956AN and BA6920FP-Y. 3) Stabilization capacitor for the power supply line, C1 Please connect the capacitor of 1F to 100F for the stabilization of the power supply line, and confirm the motor operation. 4) Phase compensating capacitor, C2, C3 Noise is generated in output pins or oscillation results in accord with the set mounting state such as power supply circuit, motor characteristics, PCB pattern artwork, etc. As noise oscillation measures, connect 0.01F to 0.1F capacitors. Functional descriptions 1) Operation modes Table 6 Logic table IN1 L H L H IN2 L L H H OUT1 OPEN* H L L OUT2 OPEN* L H L Operation Stop (idling) Forward (OUT1 > OUT2) Reverse (OUT1 < OUT2) Brake (stop) * OPEN is the off state of all output transistors. Please note that this is the state of the connected diodes, which differs from that of the mechanical relay. ** Output OUT1 and OUT2 become OPEN regardless of the input logic of FIN and RIN when switching to the power save mode with the POWERSAVE pin. a) Stand-by mode In stand-by mode, all output power transistors are turned off, and the motor output goes to high impedance. b) Forward mode This operating mode is defined as the forward rotation of the motor when the OUT1 pin is high and OUT2 pin is low. When the motor is connected between the OUT1 and OUT2 pins, the current flows from OUT1 to OUT2. c) Reverse mode This operating mode is defined as the reverse rotation of the motor when the OUT1 pin is low and OUT2 pin is high. When the motor is connected between the OUT1 and OUT2 pins, the current flows from OUT2 to OUT1. d) Brake mode This operating mode is used to quickly stop the motor (short circuit brake). Note) Switching of rotating direction (FWD/REV) When the rotating direction is changed over by the motor rotating condition, switch the direction after the motor is temporarily brought to the BRAKE condition or OPEN condition. It is recommended to keep the relevant conditions as follows: via BRAKE: Longer than braking time*. (* the time required for the output L terminal to achieve potential below GND when brake is activated.) via OPEN: The time longer than 1 ms is recommended. www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 11/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Technical Note 2) Output high voltage setting This function optionally sets output voltage by the output high voltage setting pin and controls the motor rotating speed. However, when the output high voltage is set to a low level, consumption at IC increases. Carry out thermal design with sufficient margin incorporated with the power dissipation (Pd) under the actual application condition taken into account. a) BA6287F, BA6285FS, BA6285AFP-Y The circuit diagram associated with the output high voltage setting VREF pin is as per shown on the right. The output high and low voltages VOH and VOL are expressed by: Q1 VM VREF VOH = VREF - ( VSAT(Q1) + VF(Q2) ) VOL = VSAT(Q3) (Reference values; VSAT 0.15V, VF 0.7V) In addition, the relation of VREF voltage to output voltage is expressed by: ( VSAT(Q1) + VF(Q2) ) < VREF < VM - VSAT(Q2) + VF(Q2) + VSAT(Q1) Q2 OUT Q3 RNF (GND, BA6287F) Fig.35 BA6287F, BD6285FS, BA6285AFP-Y Therefore, when the VREF voltage condition is as follows, the output high voltage is restricted. VREF > VM - VSAT(Q2) + VSAT(Q1) + VF(Q2) VOH = VM - VSAT(Q2) b) BA6956AN, BA6920FP-Y The circuit diagram associated with the output high voltage setting VREF pin is as per shown on the right. The output high and low voltages VOH and VOL are expressed by: VOH = VREF + ( VF(Q5) + VF(Q4) ) - ( VF(Q2) + VF(Q3) ) VOH VREF VOL = VSAT(Q6) (BA6956AN) VOL = VSAT(Q7) + VF(Q6) (BA6920FP-Y) (Reference values; VSAT 0.15V, VF 0.7V) The output high voltage controllable range is expressed by: VREF < VCC - VSAT(Q1) - VF(Q4) - VF(Q5) VREF < VM - ( VSAT(Q2) + VF(Q3) ) + ( VF(Q2) + VF(Q3)) - ( VF(Q4) + VF(Q5) ) (BA6956AN) VREF < VM - VSAT(Q3) + ( VF(Q2) + VF(Q3)) - ( VF(Q4) + VF(Q5) ) (BA6920FP-Y) When the VREF voltage condition is as follows, the output high voltage is restricted. VREF > VCC - VSAT(Q1) - VF(Q4) - VF(Q5) VREF > VM - ( VSAT(Q2) + VF(Q3) ) + ( VF(Q2) + VF(Q3)) - ( VF(Q4) + VF(Q5) ) (BA6956AN) VREF > VM - VSAT(Q3) + ( VF(Q2) + VF(Q3)) - ( VF(Q4) + VF(Q5) ) (BA6920FP-Y) VOH = VCC - VSAT(Q1) - VF(Q2) - VF(Q3) VOH = VM - VSAT(Q2) - VF(Q3) (BA6956AN) VOH = VM - VSAT(Q3) (BA6920FP-Y) VM VCC Q1 Q2 Q4 Q3 OUT VREF Q5 Q6 RNF VREF Q5 Q7 Q6 RNF Q4 Q1 Q2 Q3 OUT VM VCC Fig.36 BA6956AN Fig.37 BA6920FP-Y www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 12/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Interfaces FIN RIN POWER SAVE Technical Note (BA6285FS, BA6285AFP-Y, BA6920FP-Y) Fig. 38 FIN, RIN VM VCC VM VREF Fig.39 POWER SAVE VM VCC OUT1 OUT2 VREF RNF OUT1 OUT2 VREF RNF (GND, BA6287F) OUT1 OUT2 RNF (BA6956AN) (BA6287F, BA6285FS, BA6285AFP-Y) (BA6920FP-Y) Fig. 40 Notes for use VCC, VM, OUT1, OUT2, VREF, RNF, GND 1) Absolute maximum ratings Devices may be destroyed when supply voltage or operating temperature exceeds the absolute maximum rating. Because the cause of this damage cannot be identified as, for example, a short circuit or an open circuit, it is important to consider circuit protection measures - such as adding fuses - if any value in excess of absolute maximum ratings is to be implemented. 2) Connecting the power supply connector backward Connecting the power supply in reverse polarity can damage the IC. Take precautions against reverse polarity when connecting the power supply lines, such as adding an external direction diode. 3) Power supply lines Return current generated by the motor's Back-EMF requires countermeasures, such as providing a return current path by inserting capacitors across the power supply and GND (10F, ceramic capacitor is recommended). In this case, it is important to conclusively confirm that none of the negative effects sometimes seen with electrolytic capacitors - including a capacitance drop at low temperatures - occurs. Also, the connected power supply must have sufficient current absorbing capability. Otherwise, the regenerated current will increase voltage on the power supply line, which may in turn cause problems with the product, including peripheral circuits exceeding the absolute maximum rating. To help protect against damage or degradation, physical safety measures should be taken, such as providing a voltage clamping diode across the power supply and GND. 4) Electrical potential at GND Keep the GND terminal potential to the minimum potential under any operating condition. In addition, check to determine whether there is any terminal that provides voltage below GND, including the voltage during transient phenomena. When both a small signal GND and high current GND are present, single-point grounding (at the set's reference point) is recommended, in order to separate the small signal and high current GND, and to ensure that voltage changes due to the wiring resistance and high current do not affect the voltage at the small signal GND. In the same way, care must be taken to avoid changes in the GND wire pattern in any external connected component. 5) Thermal design Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) under actual operating conditions. 6) ASO - Area of Safety Operation When using the IC, set the output transistor so that it does not exceed absolute maximum ratings or ASO. www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 13/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y Technical Note 7) 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. 8) Operation in strong electromagnetic fields Using this product in strong electromagnetic fields may cause IC malfunctions. Use extreme caution with electromagnetic fields. 9) Built-in thermal shutdown (TSD) circuit The 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 in the presence of extreme heat. Do not continue to use the IC after the TSD circuit is activated, and do not operate the IC in an environment where activation of the circuit is assumed. 10) Capacitor between output and GND In the event a large capacitor is connected between the output and GND, if VCC and VIN are short-circuited with 0V or GND for any reason, the current charged in the capacitor flows into the output and may destroy the IC. Use a capacitor smaller than 0.47F between output and GND. 11) Testing on application boards When testing the IC on an application board, connecting a capacitor to a low impedance pin subjects the IC to stress. Therefore, always discharge capacitors after each process or step. Always turn the IC's power supply off before connecting it to or removing it from the test setup during the inspection process. Ground the IC during assembly steps as an antistatic measure. Use similar precaution when transporting or storing the IC. 12) Regarding the input pin of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements, in order to keep them isolated. P-N junctions are formed at the intersection of these P layers with the N layers of other elements, creating a parasitic diode or transistor. For example, the relation between each potential is as follows: When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic transistor. Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, as well as operating malfunctions and physical damage. Therefore, do not use methods by which parasitic diodes operate, such as applying a voltage lower than the GND (P substrate) voltage to an input pin. Pin A Resistor Pin A P+ N P P+ Pin B C B E Transistor (NPN) Pin B N N Parasitic element N P+ N P P+ N B C E P substrate Parasitic element GND P substrate Parasitic element GND GND GND Parasitic element Other adjacent elements Appendix: Example of monolithic IC structure Ordering part number B A 6 Type 6956A 6287 6285 6285A 6920 2 8 5 A F P - Y - E 2 ROHM part number Package N: SIP9 F: SOP8 FS: SSOP-A16 FP-Y: HSOP25 Packaging spec. E2: Embossed taping None: Container tube www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 14/15 2009.04 - Rev.A BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y SIP9 Container Quantity 21.8 0.2 2.8 0.2 Technical Note Tube 1000pcs Direction of products is fixed in a container tube. Direction of feed 10.5 0.5 5.8 0.2 3.5 0.5 1.2 1 2.54 9 0.6 0.8 1.3 0.3 0.1 (Unit:mm) SOP8 *Orders should be placed in multiples of package quantity. Tape Quantity Direction of feed Embossed carrier tape 2500pcs E2 (Holding the reel with the left hand and pulling the tape out with the right, pin 1 will be on the upper left-hand side.) 1234 (Unit:mm) SSOP-A16 Reel Tape Quantity 6.60.2 Embossed carrier tape 2500pcs E2 (Holding the reel with the left hand and pulling the tape out with the right, pin 1 will be on the upper left-hand side.) 1234 1234 1Pin *Orders should be placed in multiples of package quantity. 1234 1234 Direction of feed 1234 1234 6.20.3 1.50.1 4.40.2 0.11 1 8 0.150.1 0.1 0.8 0.360.1 0.3Min. 16 9 Direction of feed 1234 (Unit:mm) HSOP25 Reel Tape 13.6 0.2 25 Embossed carrier tape 2000pcs E2 (Holding the reel with the left hand and pulling the tape out with the right, pin 1 will be on the upper left-hand side.) 1234 1234 1Pin *Orders should be placed in multiples of package quantity. 1234 1234 Direction of feed 1234 1234 Quantity 14 2.75 0.1 7.8 0.3 5.4 0.2 1 1.95 0.1 0.8 13 0.25 0.1 1.9 0.1 0.11 0.1 0.36 0.1 0.3Min. Direction of feed 1234 (Unit:mm) Reel 1234 1234 1Pin *Orders should be placed in multiples of package quantity. 1234 1234 Direction of feed 1234 1234 www.rohm.com c 2009 ROHM Co., Ltd. All rights reserved. 15/15 2009.04 - 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. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. 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, fuel-controller 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 (c) 2009 ROHM Co., Ltd. All rights reserved. R0039A |
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