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 Symbol Ratings POWER MOS power supply voltage 1 SPVM, SLVM 15 #1 V POWER MOS power supply voltage 2 SAVM 7 #2 V Vcc, AVM, LDVM 15 V DVcc 7 V Pd 1.5 Operating temperature range Topr -20 ~ 70 ℃ Storage temperature Tstg -55 ~ 150 ℃ Junction temperature Tjmax 150 ℃ Preblock/BTL power block power supply voltage PWM control block power supply voltage Power dissipation #1 #2 #3 Unit #3 W 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 Technical Note BD7755RFV ●Recommended operating conditions (Set the power supply voltage with consideration to power dissipation) Parameter Spindle / Sled motor driver power block power supply voltage Symbol Ratings Min. Typ. SPVM,SLVM － Vcc Vcc 10.8 LDVM Unit Max. #4 － V 12 13.2 V 4.3 5.0 Vcc V SAVM,AVM 4.3 5.0 5.5 V PWM control block power supply voltage DVcc 4.3 5.0 5.5 V Spindle driver output current Iosp － 1.0 2.5 Actuator, SA, sled, loading motor driver output current Ioo － 0.5 0.8 Pre block power supply voltage Loading driver power block supply voltage SA, Actuator driver power block power supply voltage #4 #5 #5 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 Technical Note BD7755RFV ●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 IQ1 － 14 30 mA Vcc(Loading OFF) Quiescent current 2 IQ2 － 7.5 16 mA Vcc(Loading ON) Quiescent current 3 IQ3 － 7 14 mA DVcc Standby-on current 1 IST1 － 1.1 2.4 mA Vcc Standby-on current 2 IST2 － 0.16 0.4 mA DVcc Sled driver block Input dead zone (one side) Input output gain Output On resistor (top and bottom) Output limit current PWM frequency VDZSL 0 30 80 mV gmSL 0.75 1.0 1.25 A/V RONSL － 2.2 3.8 Ω ILIMSL 0.8 1.1 1.4 A fosc － 100 － kHz IL=500mA Spindle driver block<Torque instruction input / output> Input dead zone (one side)1 VDZSP1 20 55 90 mV VLRPM=L Input dead zone (one side)2 VDZSP2 20 240 450 mV VLRPM=H Input output gain 'H' gmSPH 2.68 3.5 4.32 A/V VLRPM=L Input output gain 'L' gmSPL 0.53 0.7 0.87 A/V VLRPM=H Output On resistor (top and bottom) RONSP － 1.0 1.7 Ω IL=500mA Output limit current ILIMSP 1.35 1.6 1.85 A RSPLIM=1.5kΩ fosc － 167 － kHz High voltage VOH － 4.9 － V Low voltage VOL － 0.1 － V Output offset voltage VOFA -50 0 50 mV Output saturation voltage (top and bottom) VOHA － 0.9 1.8 V IL=500mA Voltage gain H GVAH 19.6 21.6 23.6 dB VLRPM=L Voltage gain L GVAL 13.6 15.6 17.6 dB VLRPM=H VDZSA 40 80 160 mV PWM frequency FG output, PRTFLG output 100kΩ pull up to DVcc Focus / Tracking / Tilt driver block SA stepping driver block Input dead zone (one side) Input output gain gmSA 0.15 0.2 0.25 A/V Output On resistor (top and bottom) RONSA － 1.3 2.5 Ω Output limit current ILIMSA 0.28 0.4 0.52 A fosc － 100 － kHz Output offset voltage VOFLD -50 0 50 mV Output saturation voltage (top and bottom) 1 VOLD1 － 0.7 1.6 V IL=500mA LDVM=5V Output saturation voltage (top and bottom) 2 VOLD2 － 2.1 3.6 V IL=500mA LDVM=12V Voltage gain GVLD 15.5 17.5 19.5 dB PWM frequency IL=200mA Loading driver block CTL1,CTL2, LRPM Input high voltage VIH 2.5 － 3.7 V Input low voltage VIL GND － 0.5 V Others VC drop-muting VMVC 0.4 0.7 1.0 V Vcc drop-muting VMVcc 3.45 3.85 4.25 V *This product is not designed to be radiation-resistant. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 3/18 2010.06 - Rev.A Technical Note BD7755RFV 1 C_COM SPLIM 2 53 GND FG 3 52 SPVM CTL1 4 51 COM CTL2 5 50 W LRPM 6 49 N.C. PRTLIM 7 PRTLIM 48 V SPIN 8 47 U 46 N.C. 45 SPGND 44 SLVM 43 SLO2- 42 SLO2+ 41 SLO1- 40 SLO1+ 39 SL/SAGND 38 SAO2- 37 SAO2+ 36 SAO1- 35 SAO1+ 34 SLDETOUT 33 SLDET TKO+ TKO- 17 19 160kΩ 26.5kΩ 160kΩ 26.5kΩ CURR.FEED OSC 26.5kΩ 160kΩ 160kΩ 26.5kΩ 26.5kΩ 26.5kΩ PRE Logic CURR.FEED 26.5kΩ CURR. LIMIT OSC 160kΩ TKIN Logic OSC 26.5kΩ 160kΩ 160kΩ 18 OSC 26.5kΩ 26.5kΩ 160kΩ 160kΩ 160kΩ CURR. LIMIT PRE Logic 160kΩ FF 26.5kΩ PRE Logic TLO- 16 160kΩ 26.5kΩ 20 PRE Logic TLO+ 15 CURR.FEED OSC 40kΩ 80kΩ AVM/2 FCO- 14 40kΩ FF 13 LDVM/2 AGND 80kΩ 80kΩ AVM/2 12 AVM/2 11 LDO- FCO+ T.S.D 10 80kΩ LDO+ BEMF DETECTER LEVEL SHIFT 9 ×2 CURR. FEED FF LDVM 40kΩ FF LDIN STBY BRAKE CONTROL 54 LRPM C_OUT CURR. LIMIT ●Block diagram TLIN 21 FCIN 22 AVM 23 DETECTER CURR.FEED 32 SAVM 24 LEVEL SHIFT 31 SLIN1 VCC 25 LEVEL SHIFT 30 SLIN2 PRTFLG 26 29 SAIN1 DVCC 27 28 SAIN2 VC PROTECT www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4/18 LEVEL SHIFT 62.6kΩ LEVEL SHIFT 62.6kΩ 2010.06 - Rev.A Technical Note BD7755RFV ●Pin description No. Symbol 1 C_OUT 2 C_COM 3 FG 4 No. Symbol 28 SAIN2 SA driver 2 input 29 SAIN1 SA driver 1 input Frequency generator output 30 SLIN2 Sled driver 2 input CTL1 Driver logic control 1 input 31 SLIN1 Sled driver 1 input 5 CTL2 Driver logic control 2 input 32 SAVM SA driver power block power supply 6 LRPM Low rotation mode change terminal 33 SLDET Sled motor detection signal control input 7 PRTLIM Adjustable resistor connection for actuator protection 34 SLDETOUT Sled motor detection signal output 8 SPIN Spindle driver input 35 SAO1+ SA driver 1 positive output 9 LDIN Loading driver input 36 SAO1- SA driver 1 negative output 10 LDVM Loading driver block power supply 37 SAO2+ SA driver 2 positive output 11 LDO+ Loading driver positive output 38 SAO2- SA driver 2 negative output 12 LDO- Loading driver negative output 39 SL/SAGND Sled/SA driver block pre and power ground 13 AGND BTL driver block GND 40 SLO1+ Sled driver 1 positive output 14 FCO+ Focus driver positive output 41 SLO1- Sled driver 1 negative output 15 FCO- Focus driver negative output 42 SLO2+ Sled driver 2 positive output 16 TLO+ Tilt driver positive output 43 SLO2- Sled driver 2 negative output 17 TLO- Tilt driver negative output 44 SLVM Sled motor driver power supply 18 TKO+ Tracking driver positive output 45 SPGND 19 TKO- Tracking driver negative output 46 N.C. 20 TKIN Tracking driver input 47 U Spindle driver output U 21 TLIN Tilt driver input 48 V Spindle driver output V 22 FCIN Focus driver input 49 N.C. 23 AVM Actuator driver block power supply 50 W 24 VC Reference voltage input 51 COM Motor coil center point input 25 Vcc Pre block power supply 52 SPVM Spindle driver power supply 53 GND 54 SPLIM 26 27 Description Smooth capacitor connection terminal (output side) Smooth capacitor connection terminal (com side) PRTFLG Protection flag output DVcc PWM block control power supply Description Spindle driver power ground N.C. N.C. Spindle driver output W Pre block GND Adjustable resistor connection for spindle driver current limit *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 Technical Note BD7755RFV ●Equivalent-circuit diagram of the terminals Three-phase motor driver output BEMF voltage detection input 52pin 52 10k 5k 1 48 47 2 50 5k 51 45 5k 10k 53pin PWM driver output SLED1,2 PWM driver output SA1,2 44 32 BTL driver output FC,TK,TL 23 40 41 35 36 14 42 43 37 38 16 17 18 19 15 39 39 13 BTL driver output LD BTL driver input FC,TK,TL,LD PWM driver input SLED1,2 25pin 10 12 11 27pin 9 20 200Ω 21 PWM driver input SA1,2 200Ω 31 22 13 30 53pin 53pin PWM driver input Spindle Spindle current limit input 52pin 27pin 27pin 62.6kΩ 28 54 8 200Ω 29 53pin 53pin www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 53pin 6/18 2010.06 - Rev.A Technical Note BD7755RFV ●Equivalent-circuit diagram of the terminals PRTFLG, FG signal output SLDETOUT signal output 25pin SLED inner detection input 25pin 27pin 3 30Ω 10kΩ 30Ω 26 33 34 10kΩ 53pin 53pin 53pin Actuator current limit input Control signal reference voltage input 25pin 50kΩ 25pin 24 10kΩ 62.6kΩ 50kΩ 200Ω 5kΩ ×2ch 7 53pin 10kΩ ×6ch 53pin ×2ch Control signal input (CTL1) Control signal input (CTL2, LRPM) 25pin 120kΩ 25pin 50kΩ 180kΩ 270kΩ 150kΩ 150kΩ 50kΩ 50kΩ 25pin 100kΩ 6 5 4 50kΩ 20kΩ 20kΩ 50kΩ 50kΩ 150kΩ 150kΩ 53pin 53pin 53pin 53pin 53pin www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/18 2010.06 - Rev.A Technical Note BD7755RFV ●Test circuit 3 52 FG SPVM 40kΩ 9 SPGND 26.5kΩ SL/SAGND 26.5kΩ + OUT 26.5kΩ TK AVM/2 18 19 160kΩ 160kΩ 26.5kΩ 36 20 SAO1- 35 DETECTER 21 TLIN FCIN 22 FCIN AVM 23 24 VCC VC IQVC 25 PRTFLG IQDV DVCC PROTECT OUT+ OUT- 27 DVCC OUT-A V RL 47µH 62.6kΩ LEVEL SHIFT 62.6kΩ W IL 29 SAIN1 VSAIN2 28 SAIN2 V RLSP 2 1 SW-RL 2 1 1 SW-IL VSAIN1 OUTSP U 2 1 SW-IL 2-W 2-U 8/18 47µH RLSP SW-RL RLSP 47µH 47µH 2-V 1 IL www.rohm.com VSLIN2 30 LEVEL SHIFT Vo SW-RL 2 2 IL 2 31 1 © 2010 ROHM Co., Ltd. All rights reserved. SAVM VSLIN1 SLIN2 26 100k VSLDET SLIN1 LEVEL SHIFT VCC DVCC 33 SLDET SAVM LEVEL SHIFT DVCC 34 SLDETOUT 32 AVM VC 100k SAO1+ CURR.FEED TKIN TLIN 37 SAO2+ 26.5kΩ 160kΩ 38 SAO2- CURR. LIMIT 26.5kΩ OSC TKO- SLO2 CURR.FEED OSC TKO+ TKIN SLO1+ SAO2 26.5kΩ 26.5kΩ 160kΩ 160kΩ 40 CURR.FEED 39 160kΩ 160kΩ 17 TLO- SLO1- PRE Logic TL AVM/2 26.5kΩ FF + OUT 16 TLO+ 41 OSC 26.5kΩ 160kΩ 160kΩ FCO- SLO2+ SLO1 26.5kΩ 160kΩ 42 CURR. LIMIT PRE Logic AVM/2 FC + OUT 160kΩ PRE Logic 26.5kΩ 43 SLO2- PRE Logic 160kΩ FF 80kΩ FF OSC 80kΩ 15 SLVM CURR.FEED 40kΩ 13 AGND SLVM 44 40kΩ LDVM/2 LD 12 LDO- 45 80kΩ FF + OUT 11 14 N.C. OSC 80kΩ LDO+ FCO+ W 46 T.S.D 10 LDVM SP U LDIN LDVM V CURR. FEED ×2 47 N.C. SAO1 SPIN LDIN 48 OUT V 8 U PRTLIM PRTLIM VSPIN 49 Logic BEMF DETECTER 7 LEVEL SHIFT 6 LRPM LRPM CTL2 LRPM COM 50 W + OUT 5 51 COM + OUT 4 CTL1 CTL1 SPVM + OUT CTL2 GND STBY BRAKE CONTROL DVCC 4.7kΩ 2kΩ 53 C_COM 100k 1 SPLIM 2 2 CCOM 54 1 1 C_OUT + OUT COUT 1 CCOM CURR. LIMIT 2 ISPLIM SW-IL 2010.06 - Rev.A Technical Note BD7755RFV ●Functional description 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 CTL1 CTL2 SP SL(2ch) ACT(3ch) SA(2ch) LOADING ① L, HiZ L, HiZ × × × × × ② H L × ○ × × ○ ③ H HiZ ○ ○ ○ × × ④ L, HiZ H ○ ○ ○ ○ × ○:ON ⑤ H H ○ ○ ○ ○ × ×: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. ① ・Spindle braking mode table mode CTL1 CTL2 ③ H HiZ ④ L, HiZ H ⑤ H H SPIN > VC SPIN < VC Reverse-rotation braking mode (LRPM=L) Forward-rotation mode 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 ⑥ LRPM=Low SPIN<VC 120°energizing 150°energizing LRPM mode LRPM=High SPIN>VC 120°energizing SPIN<VC (H,Hi-Z,Hi-Z) Short brake * PWM frequency becomes 30kHz (Typ.) in LRPM mode. The torque at SPIN<VC becomes a counter torque ⑥ Low rotation mode Please make to low rotation mode (LRPM=HI) after it starts in normal mode (LRPM=L). 1-3.Gain switching mode Spindle driver and actuator driver 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 LRPM terminal. LRPM L HiZ H www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. SP Gain H gain (3.5A/V±0.82A/V) L gain (0.7A/V±0.17A/V) L gain (0.7A/V±0.17A/V) 9/18 ACT Gain (3ch) H gain (21.6dB±2dB) H gain (21.6dB±2dB) L gain (15.6dB±2dB) 2010.06 - Rev.A Technical Note BD7755RFV 2. Output limit for spindle (SPLIM) 3. Torque command (SPIN) (SLIN1,2) (SAIN1,2) The relation between (the torque command inputs) and (Iosp or Ioo) is expressed in the figure below: The gain is defined by the inclination between two points. (Please exclude the dead zone from the input voltage when calculating Iop. ) Iop Forward rotation Input dead zone + Input dead zone - Gain SPIN SLIN1,2 SAIN1,2 VC 4. FG output (FG) 3FG output begins after 900°degrees in electric angle, after the start mode ends and the BEMF detection starts. When the rotational speed becomes 24rpm (Max.) or less in case of brake, the FG output is fixed to high. The above-mentioned rotation speed applies to the 12 pole motor. 5. Input/Output timing chart BEMFU 》 》 BEMFV 》 》 BEMFW 》 》 》 》 》 》 》 》 》 》 SPIN VC SOURCE U MID SINK SOURCE V MID SINK SOURCE W MID SINK Ⅰ) Forward -rotation mode www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Ⅱ) Reverse-rotation braking mode 10/18 Ⅲ) Short-circuit braking mode 2010.06 - Rev.A Technical Note BD7755RFV 6. Protect system 1 It is a function to mute the actuator outputs when the IC outputs the current more than the setting threshold value IPRTLIM for 1.2sec because of the protection for the focus, the tracking, and the tilt coil. Outputs are muted similarly when the output current of two or three CHs continuously exceed the threshold for 1.2sec. It returns to normal operation by setting CTL2=L. A IPRTLIM = (A) A = 8750 RPRTLIM(Ω) PRTFLG(OUTPUT) Actuator output (FCO/TKO/TLO) H OFF L active Time until protection function operates MIN. TYP. MAX. Unit 1.0 1.2 1.4 s FCIN1 0 FCIN1 0 Current between FCO outputs 0 threshold current Current between FCO outputs 0 Current between TLO outputs 0 threshold current Current between TLO outputs 0 threshold current Current between TKO outputs 0 threshold current Current between TKO outputs 0 threshold current threshold current reset High Low CTL2 CTL2 1.2sec mute High Low 1.2sec mute 7. Protect system 2 Function to protect against destruction of output terminal when output pin connects to GND or Vcc. PRTFLG(OUTPUT) Spindle, Sled motor driver output H OFF L active ・Spindle, Sled motor ・When SINK side POWER transistor has been turned on, if the output voltage (SPVM/2&SLVM/2<TYP> or more) are detected, the channel concerned will be turned off. ・When SOURCE side POWER transistor has been turned on, if the output voltage (SPVM/2&SLVM/2<TYP> or less ) are detected, the channel concerned will be turned off. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 11/18 2010.06 - Rev.A Technical Note BD7755RFV 8. Inner detection function BEMF of the motor is monitored according to timing for the sled input signal to pass VC, and Sled is detected reaching the inner. The judgment voltage of BEMF can be set according to the voltage input to the terminal SLDET. If BEMF below the judgment voltage is detected twice continuously, it becomes SLDETOUT=L. The inner detection function can be turned off with SLDET<0.5V. When the motor starts, the terminal SLDETOUT might become L because BEMF is unstable. Please take measures such as installing the time of the mask when it starts for the detection prevention. Judgment voltage Vbemf =2.1 × (SLDET - VC) + 0.49 SLIN1 SLIN2 VC Motor Instability Stop :Detection point BEMF < Vbemt :Detection point BEMF > Vbemt SLDETOUT X SLDET 9. PWM oscillation frequency The PWM oscillation for driving the spindle and sled is free running. The sled and SA oscillating frequency is 100kHz (Typ.) The spindle oscillating frequency is 167kHz (Typ.) 10. Muting functions a) VC-drop muting When the voltage at VC terminal drops to a value lower than 0.7V (Typ.), the outputs of all the channels are turned off. Set the VC terminal voltage higher than 1.0V. b) Vcc-drop muting When the voltage at DVcc terminal and Vcc terminal drop to lower than 3.85V (Typ.), the outputs of all the channels are turned off. c) Over voltage protection circuit When the voltage at SPVM terminal exceed 14.1V (Typ.), only the spindle block output is turned off. 11. Thermal-shut down Thermal-shutdown circuit (over-temperature protection circuit) is built in to prevent the IC from thermal breakdown. Use the IC according to the thermal loss allowed in the package. In case the IC is left running over the allowed loss, the junction temperature rises, and the thermal-shutdown circuit works at a junction temperature of 175℃(Typ.) (All other channel outputs are turned off) When the junction temperature drops to 150℃ (Typ.) the IC resumes operation. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 12/18 2010.06 - Rev.A Technical Note BD7755RFV ●Notes for use 1. Absolute maximum ratings We are careful enough for quality control about this IC. So, there is no problem under normal operation, excluding that it exceeds the absolute maximum ratings. However, this IC might be destroyed when the absolute maximum ratings, such as impressed voltages (Vcc, PVcc) or the operating temperature range(Topr), is exceeded, and whether the destruction is short circuit mode or open circuit mode cannot be specified. Please take into consideration the physical countermeasures for safety, such as fusing, if a particular mode that exceeds the absolute maximum rating is assumed. 2. Power supply line Due to switching and EMI noise generated by magnetic components (inductors and motors), using electrolytic and ceramic suppress filter capacitors(0.1μF) close to the IC power input terminals (Vcc and GND) is recommended. Please note: the electrolytic capacitor value decreases at lower temperatures. Current rush might flow momentarily by the order of turning on the power supply and the delay in IC with two or more power supplies. Note the capacity of the power supply coupling, width and drawing the power supply and the GND pattern wiring.Please make the power supply lines (where large current flow) wide enough to reduce the resistance of the power supply patterns, because the resistance of power supply pattern might influence the usual operation (output dynamic range etc…). 3. GND line The ground line is where the lowest potential and transient voltages are connected to the IC. 4. Thermal design Do not exceed the power dissipation (Pd) of the package specification rating under actual operation, and please design enough temperature margins. 5. Short circuit mode between terminals and wrong mounting Do not mount the IC in the wrong direction and be careful about the reverse-connection of the power connector. Moreover, this IC might be destroyed when the dust short the terminals between them or GND 6. Radiation Strong electromagnetic radiation can cause operation failures. 7. ASO(Area of Safety Operation.) Do not exceed the maximum ASO and the absolute maximum ratings of the output driver. 8. TSD(Thermal shut-down) The TSD is activated when the junction temperature (Tj) reaches 175℃(with 25℃ hysteresis), and the output terminal is switched to Hi-z. The TSD circuit aims to intercept IC from high temperature. The guarantee and protection of IC are not purpose. Therefore, please do not use this IC after TSD circuit operates, nor use it for assumption that operates the TSD circuit. 9. Inspection by the set circuit board The stress might hang to IC by connecting the capacitor to the terminal with low impedance. Then, please discharge electricity in each and all process. Moreover, in the inspection process, please turn off the power before mounting the IC, and turn on after mounting the IC. In addition, please take into consideration the countermeasures for electrostatic damage, such as giving the earth in assembly process, transportation or preservation. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 13/18 2010.06 - Rev.A Technical Note BD7755RFV 10. Earth wiring pattern + This IC is a monolithic IC, and has P isolation and P substrate for the element separation. Therefore, a parasitic PN junction is firmed in this P-layer and N-layer of each element. For instance, the resistor or the transistor is connected to the terminal as shown in the figure below. When the GND voltage potential is greater than the voltage potential at Terminals A or B, the PN junction operates as a parasitic diode. In addition, the parasitic NPN transistor is formed in said parasitic diode and the N layer of surrounding elements close to said parasitic diode. These parasitic elements are formed in the IC because of the voltage relation. The parasitic element operating causes the wrong operation and destruction. Therefore, please be careful so as not to operate the parasitic elements by impressing to input terminals lower voltage than GND(P substrate). Please do not apply the voltage to the input terminal when the power-supply voltage is not impressed. Moreover, please impress each input terminal lower than the power-supply voltage or equal to the specified range in the guaranteed voltage when the power-supply voltage is impressing. Resistor Transistor(NPN) Terminal-A Terminal-B C Terminal-B B E Terminal-A B P+ P+ P Parasitic element C E P+ P + P P-Substrate P-Substrate Surrounding elements Parasitic element GND Parasitic element Parasitic element GND GND GND Simplified structure of IC 11. Earth wiring pattern Use separate ground lines for control signals and high current power driver outputs. Because these high current outputs that flows to the wire impedance changes the GND voltage for control signal. Therefore, each ground terminal of IC must be connected at the one point on the set circuit board. As for GND of external parts, it is similar to the above-mentioned. 12. Reverse-rotation braking In the case of reverse-rotation braking from high speed rotation, pay good attention to reverse electromotive force. Furthermore, fully check the voltage to be applied to the output terminal and consider the revolutions applied to the reverse-rotation brake. 13. About the capacitor between SPVM and SPGND The capacitor between SPVM and SPGND absorbs the change in a steep voltage and the current because of the PWM drive, as a result, there is a role to suppress the disorder of the SPVM voltage. However, the effect falls by the influence of the wiring impedance etc, if the capacitor becomes far from IC. Please examine the capacitor between SPVM and SPGND to arrange it near IC. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 14/18 2010.06 - Rev.A Technical Note BD7755RFV 1 C_COM 2 53 GND FG 3 52 SPVM CTL1 4 51 COM 50 W 49 N.C. 48 V 47 U 46 N.C. 45 SPGND 44 SLVM 43 SLO2- 42 SLO2+ 41 SLO1- 40 SLO1+ 39 SL/SAGND 38 SAO2- 37 SAO2+ 36 SAO1- 35 SAO1+ 34 SLDETOUT 33 SLDET 32 SAVM 31 SLIN1 30 SLIN2 29 SAIN1 28 SAIN2 6 PRTLIM 7 PRTLIM SPIN 8 LDIN 9 40kΩ OSC T.S.D 15 TLO+ 16 17 160kΩ 160kΩ 160kΩ TKOTKIN 20 TLIN 21 FCIN 22 AVM 23 AVM/2 18 19 26.5kΩ 26.5kΩ 160kΩ 26.5kΩ 26.5kΩ 160kΩ 160kΩ 160kΩ CURR.FEED OSC 26.5kΩ 26.5kΩ 26.5kΩ 26.5kΩ STM PRE Logic CURR.FEED 26.5kΩ 160kΩ 160kΩ 160kΩ TKO+ 26.5kΩ CURR. LIMIT OSC PRE Logic FCO- 160kΩ AVM/2 14 AVM/2 FCO+ 26.5kΩ CURR. LIMIT OSC 26.5kΩ PRE Logic 160kΩ 80kΩ PRE Logic 80kΩ FF 13 CURR.FEED OSC 40kΩ FF AGND 40kΩ FF LDO- 12 80kΩ FF 11 LDVM/2 80kΩ TLO- CURR. FEED ×2 10 LDO+ Logic 5 LEVEL SHIFT CTL2 LRPM BEMF DETECTER STBY BRAKE CONTROL SPLIM LDVM M 1.5kΩ 54 LRPM 1000pF C_OUT CURR. LIMIT ●Application circuit , STM DETECTER CURR.FEED VC 24 LEVEL SHIFT VCC 25 LEVEL SHIFT PRTFLG 26 DVCC 27 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. PROTECT 15/18 LEVEL SHIFT 62.6kΩ LEVEL SHIFT 62.6kΩ 2010.06 - Rev.A Technical Note BD7755RFV ●Connecting wires of application board www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 16/18 2010.06 - Rev.A Technical Note BD7755RFV ●Pattern drawing of application board Power dissipation : Pd (W) ●Power dissipation reduction 2.0 1.5W 1.0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE : Ta (℃) *70mm×70mm, t=1.6mm, occupied copper foil is less than 3%, glass epoxy mounting. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 17/18 2010.06 - Rev.A Technical Note BD7755RFV ●Ordering part number B D 7 Part No. 7 5 5 Part No. 7755 R F V - Package RFV: HTSSOP-B54R E 2 Packaging and forming specification E2: Embossed tape and reel (HTSSOP-B54R) HTSSOP-B54R <Tape and Reel information> 18.5±0.1 (MAX 18.85 include BURR) +6° 4° −4° (6.0) 1.0±0.2 0.5±0.15 (5.0) 1 Embossed carrier tape (with dry pack) Quantity 1500pcs 28 7.5±0.1 9.5±0.2 54 Tape Direction of feed 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 ) 27 1PIN MARK +0.05 0.17 -0.03 0.8 0.08±0.05 1.0MAX 0.85±0.05 S 0.08 S 0.65 +0.05 0.22 -0.04 0.08 1pin M Reel (Unit : mm) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 18/18 Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. 2010.06 - 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. 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, 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 © 2010 ROHM Co., Ltd. All rights reserved. R1010A