System Lens Driver Series for Digital Still Cameras / Single-lens Reflex Cameras 7ch System Lens Drivers for Digital Still Cameras / Single-lens Reflex Cameras BD6757KN, BD6889GU No.09014EAT04 ●Description BD6757KN and BD6889GU motor drivers provide 6 Full-ON Drive H-bridge channels and 1 Linear Constant-Current Drive H-bridge channel. Stepping motors can be used for the auto focus, zoom, and iris, making it possible to configure a sophisticated, high precision lens drive system. ROHM’s motor drivers are both compact, multifunctional, and enable advanced features such as lens barrier and anti shock. ●Features 3 1) Subminiature grid array package: 5.0 5.0 1.2mm (BD6889GU) 2) DMOS output allowing a range power supply: 2.0V to 8.0V (BD6757KN) 3) Low ON-Resistance Power MOS output: Full-ON Drive block with 1.3Ω Typ. and Linear Constant-Current Drive block with 0.9Ω Typ. (BD6757KN, BD6889GU) 4) Built-in two digital NPN transistor circuits for photo-interrupter waveform shaping: Input-dividing type with output pull-up resistance (BD6757KN) 5) Built-in four digital NPN transistor circuits for photo-interrupter waveform shaping: Input-dividing type with output pull-up resistance (BD6889GU) 6) Built-in four digital PNP transistor circuits for photo-interrupter waveform shaping: Input-dividing type with output pull-down resistance (BD6889GU) 7) Built-in voltage-regulator circuit for photo-interrupter (BD6889GU) 8) Built-in two-step output current setting switch for the Linear Constant-Current Drive block (BD6757KN) 9) 0.9V±2% high-precision reference voltage output 10) Constant-Current Drive block features phase compensation capacitor-free design 11) Built-in ±3% high-precision Linear Constant-Current Driver 12) Built-in charge pump circuit for the DMOS gate voltage drive(BD6757KN) 13) UVLO (Under Voltage Lockout Protection) function 14) Built-in TSD (Thermal Shut Down) circuit 15) Standby current consumption: 0μA (Typ.) ●Absolute Maximum Ratings Parameter Power supply voltage Motor power supply voltage Charge pump voltage Control input voltage Power dissipation Operating temperature range Junction temperature Storage temperature range H-bridge output current Symbol VCC VM VG VIN Pd Topr Tjmax Tstg Iout Limit BD6757KN -0.5 to +7.0 -0.5 to +10.0 15.0 -0.5 to VCC+0.5 950※1 -25 to +75 +150 -55 to +150 -800 to +800※3 BD6889GU -0.5 to +7.0 -0.5 to +7.0 None -0.5 to VCC+0.5 980※2 -25 to +85 +150 -55 to +150 -800 to +800※3 Unit V V V V mW °C °C °C mA/ch ※1 Reduced by 7.6mW/°C over 25°C, when mounted on a glass epoxy board (70mm 70mm 1.6mm). ※2 Reduced by 7.84mW/°C over 25°C, when mounted on a glass epoxy board (70mm 70mm 1.6mm). ※3 Must not exceed Pd, ASO, or Tjmax of 150°C. ●Operating Conditions (Ta=-25 to +75°C(BD6757KN), -25 to +85°C(BD6889GU)) Limit Parameter Symbol BD6889GU BD6757KN Power supply voltage VCC 2.5 to 5.5 2.5 to 5.7 Motor power supply voltage VM 2.5 to 8.0 2.5 to 5.7 Control input voltage VIN 0 to VCC 0 to VCC H-bridge output current Iout -500 to +500※4 -500 to +500※4 Unit V V V mA/ch ※4 Must not exceed Pd or ASO. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 1/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU ●Electrical Characteristics 1) BD6757KN Electrical Characteristics (Unless otherwise specified, Ta=25°C, VCC=3.0V, VM=5.0V) Limit Parameter Symbol Unit Conditions Min. Typ. Max. Overall Circuit current during standby operation Circuit current ICCST - 0 10 μA PS=0V ICC - 1.0 3.0 mA PS=VCC with no signal Control input (IN=PS, IN1A to IN7B, and LIMSW) High level input voltage VINH 2.0 - - V Low level input voltage VINL - - 0.7 V High level input current IINH 15 30 60 μA VINH=3V Low level input current IINL -1 0 - μA VINL=0V Pull-down resistor RIN 50 100 200 kΩ VCP 10 11 - V VUVLO 1.6 - 2.4 V RON - 1.3 1.6 Ω Io=±400mA on high and low sides in total tp 100 - - ns With an input pulse with of 200ns Charge pump Charge pump voltage UVLO UVLO voltage Full-ON Drive block (ch1 to ch6) Output ON-Resistance Pulse input response Linear Constant-Current Drive block (ch7) Output ON-Resistance RON - 0.9 1.1 Ω Io=±400mA on high and low sides in total VREF output voltage VREF 0.88 0.90 0.92 V Iout=0~1mA Output limit current 1 IOL1 388 400 412 mA Output limit current 2 IOL2 285 300 315 mA Output limit current 3 IOL3 190 200 210 mA RNF=0.5Ω with a load of 10Ω VLIMH(L)=0.2V, LIMSW=0V(3V) RNF=0.5Ω with a load of 10Ω 5 VLIMH(L)=0.15V, LIMSW=0V(3V)※ RNF=0.5Ω with a load of 10Ω VLIMH(L)=0.1V, LIMSW=0V(3V)※5 Digital NPN transistor block for photo-interrupter waveform shaping Input current ISIH - - 0.1 mA Low level output voltage VSOL - 0.1 0.25 V Input dividing resistance RSIL 70 100 130 kΩ Output pull-up resistance RSOH 5 10 20 kΩ Input dividing resistance comparison - 0.8 1.0 1.2 - SIx=3V SIx=3V, ISO=0.5mA Division resistance comparison between SIx and GND※5 ※5 Design target value (Not all shipped devices are fully tested.) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 2/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU 2) BD6889GU Electrical Characteristics (Unless otherwise specified, Ta=25°C, VCC=3.0V, VM=5.0V) Limit Parameter Symbol Unit Conditions Min. Typ. Max. Overall Circuit current during standby operation Circuit current ICCST - 0 10 μA PS=0V ICC - 1.5 3.0 mA PS=VCC with no signal Control input (IN=PS, IN1A to IN7B, SW, DSW, DSEL1, and DSEL2) High level input voltage VINH 2.0 - - V Low level input voltage VINL - - 0.7 V High level input current IINH 15 30 60 μA VINH=3V Low level input current IINL -1 0 - μA VINL=0V Pull-down resistor RIN 50 100 200 kΩ VUVLO 1.6 - 2.4 V RON - 1.3 1.6 Ω Io=±400mA on high and low sides in total tp 100 - - ns With an input pulse with of 200ns UVLO UVLO voltage Full-ON Drive block (ch1 to ch6) Output ON-Resistance Pulse input response Linear Constant-Current Drive block (ch7) Output ON-Resistance RON - 0.9 1.1 Ω Io=±400mA on high and low sides in total VREF output voltage VREF 0.88 0.90 0.92 V Iout=0~1mA Output limit current 1 IOL1 388 400 412 mA RNF=0.5Ω with a load of 10Ω, VLIM=0.2V Output limit current 2 IOL2 285 300 315 mA RNF=0.5Ω with a load of 10Ω, VLIM=0.15V Output limit current 3 IOL3 190 200 210 mA RNF=0.5Ω with a load of 10Ω, VLIM=0.1V SIx=3V Digital NPN transistor block for photo-interrupter waveform shaping Input current ISIH - - 0.1 mA Low level output voltage VSOL - 0.1 0.25 V Input dividing resistance RSIN 70 100 130 kΩ Output pull-up resistance RSOH 23 33 43 kΩ Input dividing resistance comparison - 0.8 1.0 1.2 - SIx=3V, ISO=0.5mA Division resistance comparison between SIx and GND※6 Digital PNP transistor block for photo-interrupter waveform shaping Input current ISIL -0.1 - - mA High level output voltage VSOH VCC-0.25 VCC-0.1 - V Input dividing resistance RSIP 70 100 130 kΩ Output pull-down resistance RSOL 23 33 43 kΩ - 0.8 1.0 1.2 - Division resistance comparison 6 between SIx and VCC※ Input dividing resistance comparison SIx=0V SIx=0V, ISO=-0.5mA Voltage-regulator for photo-interrupter High level output voltage VREGH VCC-0.25 VCC-0.2 - V IREG=100mA Output ON-Resistance RONREG - 2 2.5 Ω IREG=100mA ILPI - 0 1 μA SW=VCC Output leak current ※6 Design target value (Not all shipped devices are fully tested.) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 3/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU ●Electrical Characteristic Diagrams BD6757KN 750 570mW 500 250 750 0 25 50 75 510mW 500 250 75°C 0 980mW 1000 85°C 0 100 125 150 0 Ambient temperature : Ta [°C] (2.5V to 5.7V) 2.0 1.0 0.0 100 2.0 3.0 4.0 5.0 6.0 0.0 3.0 2.0 1.0 10.0 11.0 12.0 13.0 14.0 (2.5V to 5.7V) 2.0 1.0 0.0 15.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Supply voltage : VM [V] 7.0 BD6757KN Top 75°C Mid 25°C Low -25°C 4.0 3.0 2.0 1.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 Fig.6 Output ON-Resistance (Linear Constant-Current Drive block) BD6889GU Top 85°C Mid 25°C Low -25°C 4.0 Op. range 3.0 (2.5V to 5.7V) 2.0 1.0 BD6757KN, BD6889GU 250 200 150 100 Top 85°C Mid 25°C Low -25°C 50 0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Supply voltage : VM [V] Fig.8 Output ON-Resistance (Full-ON Drive block) (Linear Constant-Current Drive block) www.rohm.com 6.0 (Full-ON Drive block) Fig.7 Output ON-Resistance © 2009 ROHM Co., Ltd. All rights reserved. 5.0 Supply voltage : VG [V] 0.0 0.0 4.0 Fig.5 Output ON-Resistance 5.0 Output ON resistance : RON [Ω] Op. range 3.0 3.0 0.0 9.0 BD6889GU 2.0 5.0 Supply voltage : VG [V] Top 85°C Mid 25°C Low -25°C 1.0 Fig.3 Circuit current BD6757KN 4.0 7.0 Fig.4 Circuit current 4.0 1.0 Supply voltage : VCC [V] Top 75°C Mid 25°C Low -25°C Supply voltage : VCC [V] 5.0 (2.5V to 5.5V) 2.0 150 RNF voltage : VRNF [mV] 1.0 Op. range 3.0 0.0 125 0.0 0.0 Output ON resistance : RON [Ω] 75 5.0 Output ON resistance : RON [Ω] Circuit current : ICC [mA] Op. range 3.0 50 4.0 Fig.2 Power Dissipation Reduction BD6889GU Top 85°C Mid 25°C Low -25°C 4.0 25 Top 75°C Mid 25°C Low -25°C Ambient temperature : Ta [°C] Fig.1 Power Dissipation Reduction 5.0 Circuit current : ICC [mA] 940mW BD6757KN 5.0 Output ON resistance : RON [Ω] 1000 BD6889GU 1250 Power dissipation : Pd [mW] Power dissipation : Pd [mW] 1250 4/15 0 50 100 150 200 250 VLIM voltage : VLIM [mV] Fig.9 Output limit voltage (RNF=0.5Ω) 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU ●Pin arrangement and Pin Function IN2A IN2B IN3A CP1 VM2 CP2 CP3 VG CP4 VM3 SI1 IN1B SI2 IN1A OUT5A OUT4A OUT5B OUT4B PGND2 OUT3A OUT6A OUT7A PGND1 OUT2B RNF OUT2A OUT7B OUT1B SENSE OUT1A IN6A IN6B PS VM1 VCC LIMSW VLIML VLIMH VREF GND IN5B IN7A IN5A SO1 VM4 SO2 IN7B 26 OUT3B BD6757KN OUT6B 52 IN3B IN4A IN4B 39 13 Fig.10 BD6757KN Pin Arrangement (Top View) UQFN52 Package No. 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 26 Pin Name IN7B VM4 IN7A GND VREF VLIMH VLIML LIMSW VCC VM1 PS IN6B IN6A IN5B IN5A OUT1A OUT1B OUT2A OUT2B PGND1 OUT3B OUT3A OUT4B OUT4A IN1A IN1B BD6757KN Pin Function Table Function No. Pin Name Control input pin ch7 B 27 IN2A Motor power supply pin ch7 28 IN2B Control input pin ch7 A 29 IN3A Ground Pin 30 VM2 Reference voltage output pin 31 CP1 Output current setting pin 1 ch7 32 CP2 Output current setting pin 2 ch7 33 CP3 Output current setting selection pin ch7 34 CP4 Power supply pin 35 VG Motor power supply pin ch1 and ch2 36 VM3 Power-saving pin 37 IN3B Control input pin ch6 B 38 IN4A Control input pin ch6 A 39 IN4B Control input pin ch5 B 40 SI1 Control input pin ch5 A 41 SI2 H-bridge output pin ch1 A 42 OUT5A H-bridge output pin ch1 B 43 OUT5B H-bridge output pin ch2 A 44 PGND2 H-bridge output pin ch2 B 45 OUT6A Motor ground pin ch1 to ch4 46 OUT6B H-bridge output pin ch3 B 47 OUT7A H-bridge output pin ch3 A 48 RNF H-bridge output pin ch4 B 49 OUT7B H-bridge output pin ch4 A 50 SENSE Control input pin ch1 A 51 SO2 Control input pin ch1 B 52 SO1 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 5/15 Function Control input pin ch2 A Control input pin ch2 B Control input pin ch3 A Motor power supply pin ch3 and ch4 Charge pump capacitor connection pin 1 Charge pump capacitor connection pin 2 Charge pump capacitor connection pin 3 Charge pump capacitor connection pin 4 Charge pump output pin Motor power supply pin ch5 and ch6 Control input pin ch3 B Control input pin ch4 A Control input pin ch4 B Digital transistor input pin 1 Digital transistor input pin 2 H-bridge output pin ch5 A H-bridge output pin ch5 B Motor ground pin ch5 and ch6 H-bridge output pin ch6 A H-bridge output pin ch6 B H-bridge output pin ch7 A Resistance connection pin for output current detection ch7 H-bridge output pin ch7 B Output current detection pin ch7 Digital transistor output pin 2 Digital transistor output pin 1 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU 1 A 2 N.C. B 3 OUT6A OUT6B 4 VM3 5 6 7 PGND3 OUT5B OUT5A 8 N.C. DSW IN6A IN6B SO4P SO4N REG OUT4A C OUT7A SW DSEL2 IN7A SI4 IN5A PS OUT4B D VM4 VCC VREF IN7B IN5B SI3 SO3P VM2 E RNF DSEL1 IN1A IN1B IN4B IN4A SO3N PGND2 F SENSE VLIM IN2A SI1 SI2 IN3A IN3B OUT3B G OUT7B GND IN2B SO1P SO1N SO2P SO2N OUT3A H N.C. OUT1A OUT1B PGND1 VM1 OUT2B OUT2A N.C. Fig.11 BD6889GU Pin Arrangement (Top View) VBGA063T050 Package No. A1 A2 A3 A4 A5 A6 A7 A8 B1 B2 B3 B4 B5 B6 B7 B8 C1 C2 C3 C4 C5 C6 C7 C8 D1 D2 D3 D4 D5 D6 D7 D8 Pin Name N.C. OUT6A OUT6B VM3 PGND3 OUT5B OUT5A N.C. DSW IN6A IN6B SO4P SO4N REG OUT4A OUT7A SW DSEL2 IN7A SI4 IN5A PS OUT4B VM4 VCC VREF IN7B IN5B SI3 SO3P VM2 BD6889GU Pin Function Table Function No. Pin Name E1 RNF H-bridge output pin ch6 A E2 DSEL1 H-bridge output pin ch6 B E3 IN1A Motor power supply pin ch5 and ch6 E4 IN1B Motor ground pin ch5 and ch6 E5 IN4B H-bridge output pin ch5 B E6 IN4A H-bridge output pin ch5 A E7 SO3N E8 PGND2 F1 SENSE Enable input pin for transistor F2 VLIM Control input pin ch6 A F3 IN2A Control input pin ch6 B F4 SI1 PNP transistor output pin 4 F5 SI2 NPN transistor output pin 4 F6 IN3A Regulator output pin for PI F7 IN3B H-bridge output pin ch4 A F8 OUT3B H-bridge output pin ch7 A G1 OUT7B Regulator input pin for PI G2 GND Selection pin for transistor output 2 G3 IN2B Control input pin ch7 A G4 SO1P Digital transistor input pin 4 G5 SO1N Control input pin ch5 A G6 SO2P Power-saving pin G7 SO2N H-bridge output pin ch4 B G8 OUT3A Motor power supply pin ch7 H1 N.C. Power supply pin H2 OUT1A Reference voltage output pin H3 OUT1B Control input pin ch7 B H4 PGND1 Control input pin ch5 B H5 VM1 Digital transistor input pin 3 H6 OUT2B PNP transistor output pin 3 H7 OUT2A Motor power supply pin ch3 and ch4 H8 N.C. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 6/15 Function Resistance connection pin for output current detection ch7 Selection pin for transistor output 1 Control input pin ch1 A Control input pin ch1 B Control input pin ch4 B Control input pin ch4 A NPN transistor output pin 3 Motor ground pin ch3 and ch4 Output current detection pin ch7 Output current setting ch7 Control input pin ch2 A Digital transistor input pin 1 Digital transistor input pin 2 Control input pin ch3 A Control input pin ch3 B H-bridge output pin ch3 B H-bridge output pin ch7 B Ground pin Control input pin ch2 B PNP transistor output pin 1 NPN transistor output pin 1 PNP transistor output pin 2 NPN transistor output pin 2 H-bridge output pin ch3 A H-bridge output pin ch1 A H-bridge output pin ch1 B Motor ground pin ch1 and ch2 Motor power supply pin ch1 and ch2 H-bridge output pin ch2 B H-bridge output pin ch2 A - 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU ●Application Circuit Diagram Bypass filter Capacitor for power supply input. (p.14/16) 0.1μF 0.1μF 0.1μF 1～100uF CP1 VCC 31 9 Power-saving (p.9/16) H : Active L : Standby PS 11 CP2 CP3 32 33 OSC Charge Pump Power Save TSD & UVLO Motor control input (p.9/16) CP4 VG 34 35 Charge Pump Bypass filter Capacitor for power supply input. (p.14/16) BandGap 1～100uF 10 VG 16 H bridge IN1A 25 Level Shift IN1B 26 Logic12 Full ON 17 & IN2A 27 Pre Driver 18 H bridge IN2B 28 Full ON 19 VM1 OUT1A OUT1B M OUT2A Bypass filter Capacitor for power supply input. (p.14/16) OUT2B 1～100uF Motor control input (p.9/16) 30 VG 22 H bridge IN3A 29 Level Shift IN3B 37 Logic34 Full ON 21 & IN4A 38 Pre Driver 24 H bridge IN4B 39 Full ON 23 20 VM2 OUT3A OUT3B M OUT4A Bypass filter Capacitor for power supply input. (p.14/16) OUT4B PGND1 1～100uF Motor control input (p.9/16) 36 VG 42 H bridge IN5A 15 Level Shift IN5B 14 Logic56 Full ON 43 & IN6A 13 Pre Driver 45 H bridge IN6B 12 Full ON 46 44 Motor control input (p.9/16) VM3 OUT5A OUT5B M OUT6A Bypass filter Capacitor for power supply input. (p.14/16) OUT6B PGND2 1～100uF VG 2 VM4 Level Shift IN7A 3 Logic7 & IN7B 1 47 H bridge Const. Current Pre Driver 49 48 50 VCC VREF 4 GND 5 VREF 8 6 R1 When using the VREF voltage (0.9V) resistance division value as VLIMH and VLIML input value, select R1, R2, and R3 values such that, 1kΩ≦R1+R2+R3≦20kΩ (p.9/16) OUT7B RNF 0.1Ω~5.0Ω SENSE VCC The output current is converted to a voltage with the RNF external resistor and transmitted to the SENSE pin. (p.9/16) Iout[A] = (VLIMH or VLIML[V])÷RNF[Ω] Selector LIMSW OUT7A 7 40 VLIMH VLIML R2 R3 SI1 52 SO1 41 SI2 51 SO2 The sensor signal SI2, for lens position detection, is reshaped and output to SO2. p.10/16 Output current selection (p.9/16) H : VLIML L : VLIMH The sensor signal SI1, for lens position detection, is reshaped and output to SO1. p.10/16 Fig.12 BD6757KN Application Circuit Diagram www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 7/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU Bypass filter Capacitor for power supply input. (p.14/16) 1～100uF Power-saving (p.9/16) H : Active L : Standby VCC Bypass filter Capacitor for power supply input. (p.14/16) D2 Power Save PS C7 TSD & UVLO BandGap 1～100uF Motor control input (p.9/16) H5 H2 H bridge IN1A E3 Level Shift IN1B E4 Logic12 Full ON H3 & IN2A F3 Pre Driver H7 H bridge IN2B G3 Full ON H6 H4 VM1 OUT1A OUT1B M OUT2A Bypass filter Capacitor for power supply input. (p.14/16) OUT2B PGND1 1～100uF Motor control input (p.9/16) D8 G8 H bridge IN3A F6 Level Shift IN3B F7 Logic34 Full ON F8 & IN4A E6 Pre Driver B8 H bridge IN4B E5 Full ON C8 E8 VM2 OUT3A OUT3B M OUT4A Bypass filter Capacitor for power supply input. (p.14/16) OUT4B PGND2 1～100uF Motor control input (p.9/16) A4 A7 H bridge IN5A C6 Level Shift IN5B D5 Logic56 Full ON A6 & IN6A B3 Pre Driver A2 H bridge IN6B B4 Full ON A3 A5 VM3 OUT5A OUT5B M OUT6A Bypass filter Capacitor for power supply input. (p.14/16) OUT6B PGND3 1～100uF Motor control input (p.9/16) D1 VM4 Level Shift IN7A C4 Logic7 & IN7B D4 C1 H bridge Const. Current Pre Driver G1 E1 F1 Selector for Digital transistor (p.10/16) F2 DSEL1 E2 Digital transistor SW DTR Selector DSEL2 C3 VREF DSW B2 VCC REG Switch (p.10/16) H : REG output ON L : REG output OFF D3 B5 VCC B6 SW C2 SW SW C5 VCC VCC VCC VCC VCC Power supply for photo interrupter (p.10/16) VCC SW G2 VCC SW SW G5 F4 GND SI1 SO1N REG The sensor signal SI1, for lens position detection, is reshaped and output to SO1x. (p.10/16) G4 SO1P SW G7 F5 SI2 SO2N G6 SO2P REG 0.1Ω~5.0Ω SENSE VLIM R2 R1 VREF When using the VREF voltage (0.9V) resistance division value as VLIM input value, select R1 and R2 values such that, 1kΩ≦R1+R2≦20kΩ (p.9/16) SO4P SO4N SI4 The sensor signal SI4, for lens position detection, is reshaped and output to SO4x. (p.10/16) VCC SW RNF REG REG B7 VCC OUT7B VCC VCC The output current is converted to a voltage with the RNF external resistor and transmitted to the SENSE pin. (p.9/16) Iout[A] = VLIM[V]÷RNF[Ω] OUT7A SW E7 D6 SI3 SO3N D7 SO3P REG The sensor signal SI2, for lens position detection, is reshaped and output to SO2x. (p.10/16) The sensor signal SI3, for lens position detection, is reshaped and output to SO3x. (p.10/16) Fig.13 BD6889GU Application Circuit Diagram www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 8/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU ●Function Explanation 1) Power-saving function When Low-level voltage is applied to PS pin, the IC will be turned off internally and the circuit current will be 0μA (Typ.). During operating mode, PS pin should be High-level. (See the Electrical Characteristics; p.2/16 and p.3/16) 2) Motor Control input (1) INxA and INxB pins These pins are used to program and control the motor drive modes. The Full-ON drivers and the Linear Constant-Current driver use IN/IN and EN/IN input modes, respectively. (See the Electrical Characteristics; p.2/16 and p.3/16, and I/O Truth Table; p.10/16) 3) H-bridge The 7-channel H-bridges can be controlled independently. For this reason, it is possible to drive the H-bridges simultaneously, as long as the package thermal tolerances are not exceeded. The H-bridge output transistors of the BD6757KN and BD6889GU consist of Power DMOS, with the charge pump step-up power supply VG, and Power CMOS, with the motor power supply VM, respectively. The total H-bridge ON-Resistance on the high and low sides varies with the VG and VM voltages, respectively. The system must be designed so that the maximum H-bridge current for each channel is 800mA or below. (See the Operating Conditions; p.1/16) 4) Drive system of Linear Constant-Current H-bridge (BD6757KN: ch7 and BD6889GU: ch7) BD6757KN (ch7) and BD6889GU (ch7) enable Linear Constant-Current Driving. (1) Reference voltage output (with a tolerance of ±2%) The VREF pin outputs 0.9V, based on the internal reference voltage. The output current of the Constant-Current Drive block is controllable by connecting external resistance to the VREF pin of the IC and applying a voltage divided by the resistor to the output current setting pins. (BD6757KN: VLIMH and VLIML pins, BD6889GU: VLIM pin) It is recommended to set the external resistance to 1kΩ or above in consideration of the current capacity of the VREF pin, and 20kΩ or below in order to minimize the fluctuation of the set value caused by the base current of the internal transistor of the IC. (2) Output current settings and setting changes (BD6757KN) When the Low-level control voltage is applied to the LIMSW pin, the value on the VLIMH pin will be used as an output current set value to control the output current. When the High-level control voltage is applied to the LIMSW pin, the value on the VLIML pin will be used as an output current set value to control the output current. (See the Electrical Characteristics; P.2/16) (3) Output current detection and current settings By connecting external resistor (0.1Ω to 5.0Ω) to the RNF pin of the IC, the motor drive current will be converted into voltage in order to be detected. The output current is kept constant by shorting the RNF and SENSE pins and comparing the voltage with the VLIMH or VLIML voltage (VLIM voltage in the case of the BD6889GU). To perform output current settings more precisely, trim the external RNF resistance if needed, and supply a precise voltage externally to the VLIMH or VLIML pin of the IC (VLIM pin in the case of the BD6889GU). In that case, open the VREF pin. VLIMH[V] Output current value Iout[A] = or VLIML[V] RNF[Ω] VLIM[V] RNF[Ω] Select VLIMH when LIMSW is Low-level Select VLIML when LIMSW is High-level (BD6757KN) ･･････(1) (BD6889GU) The output current is 400mA3% if 0.2V is applied to the VLIMH or VLIML pin (VLIM pin in the case of the BD6889GU) and a 0.5Ω resistor is connected externally to the RNF pin. If the VLIMH and VLIML pins (VLIM pin in the case of the BD6889GU) are shorted to the VCC pin (or the same voltage level as the VCC is applied) and the SENSE and RNF pins are shorted to the ground, this channel can be used as a Full-ON Drive H-bridge like the other six channels. 5) Charge pump (BD6757KN) Each output H-bridge of the BD6757KN on the high and low sides consists of Nch DMOS. Therefore, the gate voltage VG should be higher than the VM voltage to drive the Nch DMOS on the high side. The BD6757KN has a built-in charge pump circuit that generates VG voltage by connecting an external capacitor (0.01μF to 0.1μF). If a 0.1μF capacitor is connected between: CP1 and CP2, CP3 and CP4, VG and GND Then, VG pin output voltage will be: VM1 + (VCC 2) If a 0.1μF capacitor is connected between: CP1 and CP2, VG and GND CP4 and VG pins are shorted, and CP3 pin is open Then, VG pin output voltage will be: VM1 + VCC The VM1 to VM4 respectively can be set to voltages different to one another. In order to ensure better performance, the voltage differential between VG and VM must be 4.5V or higher, and the VG voltage must not exceed the absolute maximum rating of 15V. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 9/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU 6) Digital transistor for photo-interrupter waveform shaping (BD6757KN and BD6889GU) The BD6757KN, and BD6889GU build in two digital NPN transistor circuits, and eight digital NPN and PNP transistor circuits for photo-interrupter waveform shaping, respectively. The sensor signal, for lens position detection, is reshaped and output to the DSP. The input (SIx pin) is a dividing resistance type, and provided with NPN output (SOxN pin) pull-up resistor and PNP output (SOxP pin) pull-down resistor. This is so that VCC, and GND voltage will be NPN output, and PNP output, respectively, when the input is open. In the case of the BD6889GU, DSW, DSEL1, and DSEL2 pins can control the switching of NPN and PNP transistor. The inputs are provided with input pull-down resistor. This is so that GND voltage will be input, when these three pins are open. (See I/O Truth Table; P.12/16) 7) Voltage-regulator for photo-interrupter (BD6889GU) The BD6889GU builds in voltage-regulator circuits for photo-interrupter. When High-level voltage is applied to SW pin, the REG pin will be turned on. The input is provided with input pull-down resistor. This is so that REG pin will be turn off, when the input is open. ●I/O Truth Table BD6757KN and BD6889GU Full-ON Driver ch1 to ch6 I/O Truth Table INPUT OUTPUT Drive mode INxA INxB OUTxA OUTxB L L Z Z H L H L IN/IN L H L H H H L L Output mode Standby CW CCW Brake L: Low, H: High, X: Don't care, Z: High impedance At CW, current flows from OUTA to OUTB. At CCW, current flows from OUTB to OUTA. BD6757KN and BD6889GU Linear Constant-Current Driver ch7 I/O Truth Table INPUT OUTPUT Drive mode Output mode IN7A IN7B OUT7A OUT7B L X Z Z Standby EN/IN H L H L CW H H L H CCW L: Low, H: High, X: Don't care, Z: High impedance At CW, current flows from OUTA to OUTB. At CCW, current flows from OUTB to OUTA. BD6889GU Digital Transistor I/O Truth Table INPUT DSW DSEL1 DSEL2 L X X H L L Logic H L H H H L H H H PNP1 OFF OFF OFF ON ON NPN1 OFF ON ON OFF OFF PNP2 OFF OFF OFF ON ON OUTPUT NPN2 PNP3 OFF OFF ON OFF ON ON OFF OFF OFF ON NPN3 OFF ON OFF ON OFF PNP4 OFF OFF ON OFF ON NPN4 OFF ON OFF ON OFF L: Low, H: High, X: Don’t care, OFF: GND (in the case of PNP), VCC (in the case of NPN) PNPx output to SOxP terminal, NPNx output to SOxN terminal www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 10/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU In the case of drive the Stepping Motor using ch1 and ch2 IN/IN input mode of the BD6757KN and BD6889GU 2 Phases INPUT OUTPUT Output mode ch1 / ch2 IN1A IN1B IN2A IN2B OUT1A OUT1B OUT2A OUT2B L H L L H L L H H L L H H L L L L L H H Z H L L H Z L H H L Z H H L L Z L L H H Stand by 1. CW / CW 3. CCW / CW 5. CCW / CCW 7. CW / CCW L: Low, H: High, X: Don't care, Z: High impedance At CW, current flows from OUTA to OUTB. At CCW, current flows from OUTB to OUTA. 1-2 Phases IN1A L H L L L L L H H INPUT IN1B IN2A L L L H L H H H H L H L L L L L L L IN2B L L L L L H H H L OUTPUT OUT1B OUT2A Z Z L H Z H H H H Z H L Z L L L L Z OUT1A Z H Z L L L Z H H OUT2B Z L L L Z H H H Z Output mode ch1 / ch2 Stand by 1. CW / CW 2. Z / CW 3. CCW / CW 4. CCW / Z 5. CCW / CCW 6. Z / CCW 7. CW / CCW 8. CW / Z L: Low, H: High, X: Don't care, Z: High impedance At CW, current flows from OUTA to OUTB. At CCW, current flows from OUTB to OUTA. IN1A IN1B IN2A IN2B H L H L H L H L IN1A IN1B IN2A IN2B H L H L H L H L OUT1A OUT1B H L H L OUT1A OUT1B H L H L OUT2A OUT2B H L H L OUT2A OUT2B H L H L 1 3 5 7 1 3 5 7 1 2 3 4 5 6 7 8 ：High impedance Fig.14 2 Phases Timing Sequence with IN/IN Input CW OUT2A 3 CW OUT2A Forward 1 OUT1B CCW 3 OUT1A CW 5 Reverse Fig.15 1-2 Phases Timing Sequence with IN/IN Input OUT1B CCW 7 OUT2B CCW Reverse Fig.16 Torque Vector of 2 Phases Mode www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 1 2 4 5 Forward OUT1A CW 8 6 7 OUT2B CCW Fig.17 Torque Vector of 1-2 Phases Mode 11/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU ●I/O Circuit Diagram PS, INxA, INxB, LIMSW VCC VMx, OUTxA, OUTxB, PGNDx, RNF VREF VMx VCC 10kΩ VLIMH, VLIML, SENSE VCC VCC VCC 10kΩ OUTxA OUTxB 100kΩ CP3, CP1 VG, CP4, CP2 VCC 50kΩ PGNDx RNF SIx SOx VG VCC VCC VCC VCC 10kΩ 100kΩ CP4 CP2 100kΩ VM1 Fig.18 BD6757KN I/O Circuit Diagram (Resistance values are typical ones) PS, INxA, INxB, SW, DSW, DSEL1, DSEL2 VCC VMx, OUTxA, OUTxB, PGNDx, RNF VREF VMx VCC 10kΩ VLIM, SENSE VCC VCC VCC 1kΩ OUTxA OUTxB 100kΩ SIx REG VCC 100kΩ PGNDx RNF SOxN SOxP VCC VCC 100kΩ VCC VCC VCC VCC 33kΩ 33kΩ VCC 100kΩ 100kΩ 100kΩ Fig.19 BD6889GU I/O Circuit Diagram (Resistance values are typical ones) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 12/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU ●Heat Dissipation 1) Power Consumption The power consumption of the IC (Pw) is expressed by the following formula. 2 2 Pw[W] = VCC[V] ICC[A] + Iout [A ] RON[Ω] (Full-ON Drive block and PWM Constant-Current Drive block) = VCC[V] ICC[A] + Iout[A] (VM[V] - VRNF[V] - Iout[A] Rm[Ω]) (Linear Constant-Current Drive block) ･･････(2) ･･････(3) Pw: Power consumption of the IC VCC: Power supply voltage on the VCC pin ICC: Current consumption of the VCC pin Iout: Current consumption of the VM pin on the drive channel RON: Total ON-Resistance on the high and low drive channel VM: Power supply voltage on the VM pin on the drive channel VRNF: Voltage on the RNF pin on the drive channel Rm: Resistance on the motor on the drive channel While in operation, check that the junction temperature (Tjmax) of the IC will not be in excess of 150℃, in consideration of formula (2), formula (3), the package power (Pd), and ambient temperature (Ta). If the junction temperature exceeds 150℃, the IC will not work as a properly. This can cause problems, such as parasitic oscillation and temperature leakage. If the IC is used under such conditions, it will result in characteristic degradation and eventually fail. Be sure to keep the junction temperature lower than 150℃. 2) Measurement Method of Junction Temperature The junction temperature can be measured by the following method. By using the diode temperature characteristics of the control input pin, on a channel that is not driven, the junction temperature X can be measured in a pseudo manner. VIN V GND 50μA The junction temperature X[℃] under certain conditions is expressed by formula (4), provided that the temperature characteristic of the diode is -2 mV/℃ X[°C] = Fig.20 Tjmax Measurement Circuit Diagram a - b[mV] + 25[°C] ･･････(4) -2 [mV/°C] X: Junction temperature a: The voltmeter V value at a junction temperature of 25℃ b: The voltmeter V value at a junction temperature of X℃ -2: Temperature characteristic of diode If the exact junction temperature is desired, it is necessary to measure the specific temperature characteristic of the internal diode, of each IC. ●Notes for use 1) Absolute maximum ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. The implementation of a physical safety measure such as a fuse should be considered when use of the IC in a special mode where the absolute maximum ratings may be exceeded is anticipated. 2) Storage temperature range As long as the IC is kept within this range, there should be no problems in the IC’s performance. Conversely, extreme temperature changes may result in poor IC performance, even if the changes are within the above range. 3) Power supply pins and lines None of the VM line for the H-bridges is internally connected to the VCC power supply line, which is only for the control logic or analog circuit. Therefore, the VM and VCC lines can be driven at different voltages. Although these lines can be connected to a common power supply, do not open the power supply pin but connect it to the power supply externally. Regenerated current may flow as a result of the motor's back electromotive force. Insert capacitors between the power supply and ground pins to serve as a route for regenerated current. Determine the capacitance in full consideration of all the characteristics of the electrolytic capacitor, because the electrolytic capacitor may loose some capacitance at low temperatures. If the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. It is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and ground pins. For this IC with several power supplies and a part consists of the CMOS block, it is possible that rush current may flow instantaneously due to the internal powering sequence and delays, and to the unstable internal logic, respectively. Therefore, give special consideration to power coupling capacitance, width of power and ground wirings, and routing of wiring. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 13/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU 4) Ground pins and lines Ensure a minimum GND pin potential in all operating conditions. Make sure that no pins are at a voltage below the GND at any time, regardless of whether it is a transient signal or not. When using both small signal GND and large current MGND patterns, it is recommended to isolate the two ground patterns, placing a single ground point at the application's reference point 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. The power supply and ground lines must be as short and thick as possible to reduce line impedance. 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) Pin short and wrong direction assembly of the device 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 positive and ground power supply terminals are reversed. The IC may also be damaged if pins are shorted together or are shorted to other circuit’s power lines. 7) Actions in strong magnetic field Use caution when using the IC in the presence of a strong magnetic field as doing so may cause the IC to malfunction. 8) ASO When using the IC, set the output transistor for the motor so that it does not exceed absolute maximum ratings or ASO. 9) Thermal shutdown circuit If the junction temperature (Tjmax) reaches 175°C, the TSD circuit will operate, and the coil output circuit of the motor will open. There is a temperature hysteresis of approximately 20°C (BD6757KN Typ.) and 25°C (BD6889GU Typ.). The TSD circuit is designed only to shut off the IC in order to prevent runaway thermal operation. It is not designed to protect the IC or guarantee its operation. The performance of the IC’s characteristics is not guaranteed and it is recommended that the device is replaced after the TSD is activated. 10) Testing on application board 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 and storing the IC. 11) Application example The application circuit is recommended for use. Make sure to confirm the adequacy of the characteristics. When using the circuit with changes to the external circuit constants, make sure to leave an adequate margin for external components including static and transitional characteristics as well as dispersion of the IC. 12) Regarding input pin of the IC + This monolithic IC contains P isolation and P substrate layers between adjacent elements 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, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic diode and transistor. Parasitic elements can occur inevitably in the structure of the IC. The operation of parasitic elements can result in mutual interference among circuits, operational faults, or physical damage. Accordingly, methods by which parasitic elements operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin, should not be used. Resistor Pin A Pin B C Transistor (NPN) B Pin A N P + N P P N + N Parasitic element P+ P substrate Parasitic element GND Pin B E B N P P C + N E Parasitic element P substrate Parasitic element GND GND Other adjacent elements GND Fig.21 Example of Simple IC Architecture www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 14/15 2009.06 - Rev.A Technical Note BD6757KN, BD6889GU ●Ordering part number B D 6 Part No. 7 5 7 K Part No. 6757 : Wide power supply voltage range 6889 : Subminiature package N - E 2 Package Packaging and forming specification KN : UQFN52 E2: Embossed tape and reel GU : VBGA063T050 UQFN52 7.0±0.1 39 7.2±0.1 <Tape and Reel information> 7.2 ± 0.1 7.0 ± 0.1 (1.2) 27 26 40 14 52 0.05 2500pcs Direction of feed 13 0.2 ± 0.05 Embossed carrier tape (with dry pack) Quantity M 0.22±0.05 +0.03 0.02 -0.02 0.95MAX 1 Tape +0.1 0.6 -0.3 E2 The direction is the 1pin of product is at the upper left when you hold ( reel on the left hand and you pull out the tape on the right hand ) 0.05 5) .5 (0 .4 (0 35) (0 .2 ) Notice : Do not use the dotted line area for soldering 0.4 1pin Reel (Unit : mm) Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. VBGA063T050 <Tape and Reel information> 0.08 S 63- φ 0.3±0.05 φ 0.05 M S AB P=0.5×7 0.5 0.23 1.2MAX 5.0±0.1 5.0 ± 0.1 1PIN MARK Tape Embossed carrier tape (with dry pack) Quantity 2500pcs Direction of feed S E2 The direction is the 1pin of product is at the upper left when you hold ( reel on the left hand and you pull out the tape on the right hand ) 0.75±0.1 0.5 B 12345678 0.75± 0.1 H G F E D C B A P=0.5× 7 A www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 1pin (Unit : mm) Reel 15/15 Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. 2009.06 - 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. 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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 © 2009 ROHM Co., Ltd. All rights reserved. R0039A