BD7755RFV

System Motor Driver ICs for CD / DVD / Blu-ray Drive and Recorder System Motor Driver IC for Half Height Drive (Sensor less) BD7755RFV No.10012EAT01 ●Description BD7755RFV are ICs, developed for the spindle motor, actuator coil, tilt coil, stepping motor, SA stepping motor and the loading motor drive of the desktop Blu-ray drive and Blu-ray recorder. Spindle driver adopted sensorless drive system, and the hall sensor (3 pieces) of the motor position detection is not needed, it is suitable for making of flexible cable conserve wiring and the reductions of external parts. The low rotation mode is built in, and stability and low-speed a rotation is achieved. The spindle, stepping and SA stepping use power MOSFET to reduce power consumption and the actuator, tilt, and loading driver use a linear BTL drive system to reduce noise. ●Features 1) The low-speed stability rotation is achieved with built-in the low rotation mode. 2) The hall sensor is unnecessary according to 3 aspect sensorless drive system. 3) The spindle motor driver achieves stability high speed start by ROHM's own energizing method. 4) Highly effective spindle, stepping and SA stepping is achieved by PWM control driver. And the output current detection resistance of stepping and SA stepping is unnecessary by built-in internal detection circuit. 5) The actuator, tilt and loading driver achieve low noise by using linear BTL drive system. 6) ON/OFF of loading and other channels, brake mode of spindle driver and standby mode are selectable by the two control terminals. 7) Built-in thermal-shut down circuit. 8) Improved heat radiation efficiency utilizing HTSSOP package. ●Applications For desktop Blu-ray drive ●Absolute maximum ratings Parameter POWER MOS power supply voltage 1 POWER MOS power supply voltage 2 Preblock/BTL power block power supply voltage PWM control block power supply voltage Power dissipation Operating temperature range Storage temperature Junction temperature #1 #2 #3 Symbol SPVM, SLVM SAVM Vcc, AVM, LDVM DVcc Pd Topr Tstg Tjmax Ratings 15 7 15 7 1.5 -20 ~ 70 -55 ~ 150 150 #3 #1 Unit V V V V W ℃ ℃ ℃ #2 POWER MOS output terminals (40~43pin, 46～48pin) are contained. POWER MOS output terminals (35~38pin) are contained. PCB mounting (70mmX70mmX1.6mm, occupied copper foil is less than 3%, glass epoxy standard board). Reduce by 12mW/℃ over 25℃ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/18 2010.06 - Rev.A BD7755RFV ●Recommended operating conditions (Set the power supply voltage with consideration to power dissipation) Parameter Spindle / Sled motor driver power block power supply voltage Pre block power supply voltage Loading driver power block supply voltage SA, Actuator driver power block power supply voltage PWM control block power supply voltage Spindle driver output current Actuator, SA, sled, loading motor driver output current #4 #5 Technical Note Symbol SPVM,SLVM Vcc LDVM SAVM,AVM DVcc Iosp Ioo Ratings Min. － 10.8 4.3 4.3 4.3 － － Typ. Vcc 12 5.0 5.0 5.0 1.0 0.5 #4 Max. － 13.2 Vcc 5.5 5.5 2.5 0.8 #5 Unit V V V V V A A Set the same supply voltage to SPVM, SLVM and Vcc. The current is guaranteed 3.5A in case of the Short-circuit braking mode and the current which is turned on/off in a duty-ratio of less than 1/10 with a maximum on-time of 5msec www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 2/18 2010.06 - Rev.A BD7755RFV Technical Note ●Electrical characteristics (Unless otherwise noted, Ta=25℃, Vcc=SPVM=SLVM=12V, DVcc=AVM=SAVM= LDVM=5V, Vc=1.65V,RL=8Ω,RLSP=2Ω) Limits Parameter Symbol Unit Conditions MIN. TYP. MAX. Circuit current Quiescent current 1 Quiescent current 2 Quiescent current 3 Standby-on current 1 Standby-on current 2 Sled driver block Input dead zone (one side) Input output gain Output On resistor (top and bottom) Output limit current PWM frequency Input dead zone (one side)1 Input dead zone (one side)2 Input output gain 'H' Input output gain 'L' Output On resistor (top and bottom) Output limit current PWM frequency FG output, PRTFLG output High voltage Low voltage Focus / Tracking / Tilt driver block Output offset voltage Output saturation voltage (top and bottom) Voltage gain H Voltage gain L SA stepping driver block Input dead zone (one side) Input output gain Output On resistor (top and bottom) Output limit current PWM frequency Loading driver block Output offset voltage Output saturation voltage (top and bottom) 1 Output saturation voltage (top and bottom) 2 Voltage gain CTL1,CTL2, LRPM Input high voltage Input low voltage Others VC drop-muting Vcc drop-muting *This product is not designed to be radiation-resistant. IQ1 IQ2 IQ3 IST1 IST2 VDZSL gmSL RONSL ILIMSL fosc VDZSP1 VDZSP2 gmSPH gmSPL RONSP ILIMSP fosc VOH VOL VOFA VOHA GVAH GVAL VDZSA gmSA RONSA ILIMSA fosc VOFLD VOLD1 VOLD2 GVLD VIH VIL VMVC VMVcc － － － － － 0 0.75 － 0.8 － 20 20 2.68 0.53 － 1.35 － － － -50 － 19.6 13.6 40 0.15 － 0.28 － -50 － － 15.5 2.5 GND 0.4 3.45 14 7.5 7 1.1 0.16 30 1.0 2.2 1.1 100 55 240 3.5 0.7 1.0 1.6 167 4.9 0.1 0 0.9 21.6 15.6 80 0.2 1.3 0.4 100 0 0.7 2.1 17.5 － － 0.7 3.85 30 16 14 2.4 0.4 80 1.25 3.8 1.4 － 90 450 4.32 0.87 1.7 1.85 － － － 50 1.8 23.6 17.6 160 0.25 2.5 0.52 － 50 1.6 3.6 19.5 3.7 0.5 1.0 4.25 mA mA mA mA mA mV A/V Ω A kHz mV mV A/V A/V Ω A kHz V V mV V dB dB mV A/V Ω A kHz mV V V dB V V V V Vcc(Loading OFF) Vcc(Loading ON) DVcc Vcc DVcc IL=500mA Spindle driver block VLRPM=L VLRPM=H VLRPM=L VLRPM=H IL=500mA RSPLIM=1.5kΩ 100kΩ pull up to DVcc IL=500mA VLRPM=L VLRPM=H IL=200mA IL=500mA LDVM=5V IL=500mA LDVM=12V www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 3/18 2010.06 - Rev.A BD7755RFV ●Block diagram CURR. LIMIT Technical Note C_OUT C_COM FG CTL1 CTL2 LRPM PRTLIM SPIN LDIN LDVM LDO+ LDOAGND FCO+ FCOTLO+ TLOTKO+ TKOTKIN TLIN FCIN AVM VC VCC PRTFLG DVCC 1 2 3 STBY BRAKE CONTROL 54 53 52 51 50 SPLIM GND SPVM COM W N.C. V U N.C. SPGND SLVM SLO2SLO2+ SLO1SLO1+ SL/SAGND SAO2SAO2+ SAO1SAO1+ SLDETOUT SLDET SAVM SLIN1 SLIN2 SAIN1 SAIN2 4 5 6 7 8 9 10 LRPM BEMF DETECTER LEVEL SHIFT Logic 49 48 47 46 PRTLIM 40kΩ ×2 T.S.D CURR. FEED OSC 45 44 80kΩ LDVM/2 80kΩ 11 12 13 40kΩ 40kΩ 80kΩ 80kΩ FF PRE Logic CURR.FEED OSC 43 42 41 40 39 160kΩ AVM/2 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 160kΩ 15 16 17 18 160kΩ 160kΩ AVM/2 160kΩ 160kΩ CURR.FEED CURR.FEED OSC FF PRE Logic FF 14 CURR. LIMIT OSC 160kΩ 160kΩ 160kΩ AVM/2 160kΩ 160kΩ PRE Logic 38 37 36 35 DETECTER 160kΩ 20 CURR.FEED PRE Logic FF 19 CURR. LIMIT OSC 21 22 23 24 25 26 27 PROTECT LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT 34 33 32 31 30 29 28 62.6kΩ 62.6kΩ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4/18 2010.06 - Rev.A BD7755RFV ●Pin description 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 27 Symbol C_OUT C_COM FG CTL1 CTL2 LRPM PRTLIM SPIN LDIN LDVM LDO+ LDOAGND FCO+ FCOTLO+ TLOTKO+ TKOTKIN TLIN FCIN AVM VC Vcc Description Smooth capacitor connection terminal (output side) Smooth capacitor connection terminal (com side) Frequency generator output Driver logic control 1 input Driver logic control 2 input Low rotation mode change terminal Adjustable resistor connection for actuator protection Spindle driver input Loading driver input Loading driver block power supply Loading driver positive output Loading driver negative output BTL driver block GND Focus driver positive output Focus driver negative output Tilt driver positive output Tilt driver negative output Tracking driver positive output Tracking driver negative output Tracking driver input Tilt driver input Focus driver input Actuator driver block power supply Reference voltage input Pre block power supply No. 28 29 30 31 32 33 Symbol SAIN2 SAIN1 SLIN2 SLIN1 SAVM SLDET Technical Note Description SA driver 2 input SA driver 1 input Sled driver 2 input Sled driver 1 input SA driver power block power supply Sled motor detection signal control input 34 SLDETOUT Sled motor detection signal output 35 36 37 38 SAO1+ SAO1SAO2+ SAO2SA driver 1 positive output SA driver 1 negative output SA driver 2 positive output SA driver 2 negative output Sled/SA driver block pre and power ground Sled driver 1 positive output Sled driver 1 negative output Sled driver 2 positive output Sled driver 2 negative output Sled motor driver power supply Spindle driver power ground N.C. Spindle driver output U Spindle driver output V N.C. Spindle driver output W Motor coil center point input Spindle driver power supply Pre block GND Adjustable resistor connection for spindle driver current limit 39 SL/SAGND 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 SLO1+ SLO1SLO2+ SLO2SLVM SPGND N.C. U V N.C. W COM SPVM GND SPLIM PRTFLG Protection flag output DVcc PWM block control power supply *Positive/negative of the output terminals is determined in reference to those of the input terminals. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 5/18 2010.06 - Rev.A BD7755RFV ●Equivalent-circuit diagram of the terminals Three-phase motor driver output 52pin Technical Note BEMF voltage detection input 10k 5k 1 52 47 48 50 2 51 5k 5k 10k 45 53pin PWM driver output SLED1,2 44 PWM driver output SA1,2 32 BTL driver output FC,TK,TL 23 40 42 41 43 35 37 36 38 14 16 18 15 17 19 39 39 13 BTL driver output LD 10 BTL driver input FC,TK,TL,LD 25pin PWM driver input SLED1,2 27pin 11 12 9 20 22 21 200Ω 30 31 200Ω 13 53pin 53pin PWM driver input SA1,2 PWM driver input Spindle Spindle current limit input 27pin 52pin 27pin 62.6kΩ 28 29 53pin 8 200Ω 54 53pin 53pin www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 6/18 2010.06 - Rev.A BD7755RFV ●Equivalent-circuit diagram of the terminals PRTFLG, FG signal output SLDETOUT signal output 25pin Technical Note SLED inner detection input 25pin 27pin 3 26 30Ω 34 30Ω 10kΩ 33 10kΩ 53pin 53pin 53pin Actuator current limit input 25pin Control signal reference voltage input 25pin 50kΩ 10kΩ 5kΩ 24 62.6kΩ 200Ω 50kΩ ×2ch 53pin 7 10kΩ ×6ch ×2ch 53pin Control signal input (CTL1) Control signal input (CTL2, LRPM) 25pin 120kΩ 25pin 150kΩ 50kΩ 150kΩ 50kΩ 25pin 100kΩ 6 50kΩ 150kΩ 50kΩ 150kΩ 53pin 50kΩ 4 50kΩ 180kΩ 270kΩ 5 20kΩ 20kΩ 53pin 53pin 53pin 53pin www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/18 2010.06 - Rev.A BD7755RFV ●Test circuit Technical Note ISPLIM 1 CCOM 1 C_OUT CURR. LIMIT COUT 54 SPLIM 2 1 1 4.7kΩ 2kΩ DVCC CTL2 3 FG STBY BRAKE CONTROL 52 SPVM SPVM 4 CTL1 51 COM W COM Logic 7 VSPIN LDIN LDVM PRTLIM LEVEL SHIFT PRTLIM 48 V U SPIN 40kΩ 9 LDIN ×2 T.S.D CURR. FEED OSC 46 N.C. 10 LDVM 80kΩ 40kΩ 40kΩ 80kΩ 80kΩ 45 SPGND U 8 47 LDO+ LDVM/2 11 12 LDO- 44 CURR.FEED FF OSC 80kΩ SLVM SLO2- 13 AGND AVM/2 160kΩ 160kΩ 160kΩ 160kΩ 160kΩ AVM/2 160kΩ 160kΩ 160kΩ 160kΩ 160kΩ 160kΩ 160kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ CURR. LIMIT PRE Logic FF OSC 42 SLO2+ SLO1- FCO+ 15 FCO- 40 SLO1+ CURR.FEED CURR.FEED FF OSC PRE Logic 16 TLO+ 39 SL/SAGND SAO2- TLO- 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ 18 AVM/2 TKO+ CURR. LIMIT PRE Logic FF OSC 37 SAO2+ SAO1- TKIN TLIN FCIN AVM VC VCC IQVC TKO- 20 TKIN CURR.FEED 35 SAO1+ DETECTER 100k + OUT 21 TLIN 34 SLDETOUT 22 FCIN 33 SLDET VSLDET SAVM VSLIN1 VSLIN2 VSAIN1 VSAIN2 23 AVM 32 LEVEL SHIFT LEVEL SHIFT PROTECT LEVEL SHIFT LEVEL SHIFT 62.6kΩ 62.6kΩ SAVM 24 VC 31 SLIN1 25 VCC 30 SLIN2 DVCC 100k 26 PRTFLG 29 SAIN1 27 DVCC IQDV DVCC 28 SAIN2 OUT+ OUT-A OUT- OUTSP U W V 2 1 RLSP SW-RL 2 1 47µH RLSP SW-RL RLSP 47µH 47µH V 47µH RL Vo SW-RL 2 1 2 1 SW-IL IL IL 2 1 SW-IL 2-W 2-U 2-V 1 IL SW-IL www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. SAO1 19 36 + OUT SAO2 17 38 + OUT SLO1 14 41 + OUT SLO2 PRE Logic 43 SP LRPM BEMF DETECTER N.C. OUT V 6 LRPM LRPM CTL2 49 W CTL1 5 50 SLVM DVCC 8/18 2010.06 - Rev.A 2 CCOM 2 2 100k C_COM 53 GND + OUT + OUT LD FC TL TK + OUT + OUT BD7755RFV ●Functional description Technical Note 1-1. Driver logic control terminal 1and 2 (CTL1,2) All drivers and spindle-drive braking modes can be switched on/off by inputting combinations of H-level signal (higher than 2.5V and lower than 3.7V), L-level signal (lower than 0.5V) and HiZ signal (open) to these terminals. ・Driver ON/OFF logic table mode ① ② ③ ④ ⑤ ① CTL1 L, HiZ H H L, HiZ H CTL2 L, HiZ L HiZ H H SP × × ○ ○ ○ SL(2ch) × ○ ○ ○ ○ ACT(3ch) × × ○ ○ ○ SA(2ch) × × × ○ ○ LOADING × ○ × × × ○:ON ×:OFF Stand-by mode The IC is brought into stand-by mode, and its power dissipation can be limited. ② Drivers muting All output channels, except the loading and sled motor are muted and their outputs are turned off. ③ SA mute mode The loading and SA driver are muted. ④⑤ Loading OFF mode Only the loading driver is muted. ・Spindle braking mode table mode CTL1 CTL2 ③ H HiZ ④ ⑤ L, HiZ H H H SPIN > VC Forward-rotation mode SPIN < VC Reverse-rotation braking mode (LRPM=L) Short-circuit braking mode Reverse-rotation braking mode (LRPM=L) ③⑤Reverse-rotation braking mode (spindle) When SPIN < VC, all output are shorted to SPVM in 4500rpm (Typ.) or more, in less than 4500rpm (Typ.) the output become reverse-rotation braking mode. Rotation speed is less than 140rpm when SPIN < VC, all the output are shorted to SPVM. (However, the above-mentioned rotational speed is expressed in the case of 12pole motor.) ④ Short-circuit braking mode (spindle) All the spindle driver outputs are shorted to SPVM when SPIN < VC. 1-2.Spindle output mode The spindle output changes as follows by the setting of LRPM and SPIN. (CTL1=H,CTL2=H or HiZ) Rotation speed 0rpm 400rpm 4500rpm SPIN>VC 120°energizing 150°energizing Normal mode LRPM=Low ⑥ LRPM mode LRPM=High SPINVC SPIN