AM9858

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Specifications subject to change without notice - 1 -

180 Deg BLDC Motor Driver for Optical

The AM9858 is developed to drive Brush-less spindle motor. This IC has braking select. Forward rotation mode and braking mode are able to be selected by two control terminals.  Applications CD-ROM, DVD-ROM, DVD-RW , BD-ROM and car DVD drive  Features 1) Silent Direct-PWM-driving system 2) Current limit circuit 3) Built in FG-output 4) Hall Bias circuit 5) Reverse rotation detect and protection 6) Low consumption 7) Short brake 8) Built-in thermal-shut-down circuit  Absolute Maximum Ratings (Ta = 25℃) *Note : Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. *70mm×70mm×1.6mm glass epoxy board. *Reducing in done at 17.6mW/℃ for operating above Ta = 25℃. **Do not exceed Pd ASO and Tj = 150℃.  Recommended operating conditions (Set the power supply voltage taking allowable dissipation into considering) Parameter Symbol Min Typ Max Unit 5V Power supply Vcc1/Vcc2 4 5 6 V Motor power supply VM VCC1/VCC2 12 14 V Spindle output current Io - 1.0 1.5 A PWM carrier frequency Fosc - 130 - KHz Parameter Symbol Limits Unit 5V voltage Supply Vcc1/Vcc2 7 V Motor power supply VM 15 V Thermal Resistance Junction-ambient  ja *57 oC/W Spindle output current Io *1.6 A Power dissipation Pd *2.2 W Operating temperature Topr -40 to +85 ℃ Storage temperature Tstg **-40 to +150 ℃

Specifications subject to change without notice - 2 -  Electrical Characteristics (Unless otherwise specified, Ta = 25℃, VCC1=VCC2= 5V, VM=12V, RSP=0.44Ω, VREF=1.65V) Parameter Symbol Limit Unit Conditions Min Typ Max Common Sleep current I SC - 500 - uA MU1=0V Quiescent current I CC - 4 - mA MU1=5V, MU2=5V MUTE1/MUTE2 terminal low voltage VMU1L/ VMU2L 0 - 0.8 V MU1/MU2 MUTE1/MUTE2 terminal high voltage VMU1H/ VMU2H 2.5 - 5 V MU1/MU2 MUTE1/MUTE2 terminal input current IMU1/ IMU2 - 85 200 uA MU1/MU2=5V PWM carrier frequency Fosc - 130 - KHz OSC: with 68pF VREF input voltage range VinREF 1.0 - 3.0 V VREF terminal input current IinREF - 90 - uA VREF=1.65V Spindle driver block < Hall bias> HB output voltage VHB 0.8 1.1 1.4 V IHB = 10mA 2.1 2.5 2.8 V IHB = 30mA HB terminal sink current IHB - - 30 mA MU1=5V Spindle driver block <Hall amplifier> Common mode input range VHcom 1.3 - 3.7 V HU+, HU-, HV+, HV-, HW+, HW- Input signal level VHmin 60 - - mVp-p HU+, HU-, HV+, HV-, HW+, HW- Spindle driver block <Torque control> Output on resistance RDSON - 2.0 - Ω Io=0.5[A], VM=12V Output on resistance RDSON - 3.0 - Ω Io=0.25[A], VM=5V Control voltage dead zone- VDZ- -80 -40 0 mV SPIN<VREF [REVERSE] Control voltage dead zone+ VDZ+ 0 +40 +80 mV VREF<SPIN [FORWARD] Control gain Gvo 0.85 1.0 1.15 V/V Gio=Gvo/Rs[A/V] Control limit 1F Vlim1F 0.46 0.55 0.615 V Ilim1F=Vlim1F/Rs [FORWARD] MU2=0V Control limit 1R Vlim1R 0.28 0.33 0.38 V Ilim1R=Vlim1R/Rs [REVERSE]  This product is not designed for protection against radioactive rays.  Hall sensor power supply is recommended to be 5V to ensure Hall input range keeps 1.3Vmin ~3.7V max at Ta= -40’c~85’c condition.

Specifications subject to change without notice - 3 -  Block Diagram 28 27 26 25 24 23 22 21 20 19 18 17 16 15 8 9 10 11 12 13 141 4 5 6 72 3 FG REVERSE 180 ° MATRIX CTL amp. Direction Comp Frequency Generator Current Comp Bias Brake Select Hall Bias TSD FG MU1 MU2 SPIN VREF VCC2 VM RSP1 RSP W PGND PGND V PGND UH W - H W + HV- HV+ HU-HU+HBOSCSPCNFCdGND HGNDVCC1

Specifications subject to change without notice - 4 -  Pin configuration VCC1 GND HGND FG MU1 MU2 SPCNF FIN Cd OSC SPIN VREF HB HU+ HU- VCC2 VM RSP1 RSP W PGND PGND FIN V PGND U HW- HW+ HV- HV+ AM9858

Specifications subject to change without notice - 5 -  Pin Description PIN No Pin Name Function

1 VCC1 5V Power Supply

2 GND GND

3 HGND HGND

4 FG Frequency generator output

5 MU1 Mute/Brake select terminal 1

6 MU2 Mute/Brake select terminal 2

7 Cd Delay time capacitor pin

8 SPCNF Spindle reference capacitor

9 OSC PWM carrier oscillation set

10 SPIN Spindle driver input

11 VREF Reference voltage input

12 HB Bias for Hall Sensor

13 HU+ HU+ sensor amp. Input 14 HU- HU– sensor amp. Input 15 HV+ HV+ sensor amp. Input 16 HV- HV– sensor amp. Input 17 HW+ HW+ sensor amp. Input 18 HW- HW– sensor amp. Input

19 U Motor drive output U

20 PGND Power GND

21 V Motor drive output V

22 PGND Power GND

23 PGND Power GND

24 W Motor drive output W

25 RSP Spindle current sense

26 RSP1 Spindle current sense1

27 VM Motor Power Supply

28 VCC2 5V Power Supply

Specifications subject to change without notice - 6 -  Power dissipation curve: *70mm×70mm×1.6mm glass epoxy board. *De-rating is done at 17.6mW/ ℃ for operating above T a=25℃ Power dissipation: Pd (W) Ambient temperature : Ta (℃) 2.0 1.5 1.0 25 50 75 100 125 150 Pd(W) Ta(℃) 2.5

Specifications subject to change without notice - 7 -  Application circuit (operate VM=12V)  Application circuit (operate VM=5V)  Hall Vp-p input signal level is recommended to be at least 450mV to ensure sufficient UVW output driver current 1.9A p-p at VM= 8v, Rsp=0.44 ohm ,Ta=85’c condition. 28 27 26 25 24 23 22 21 20 19 18 17 16 15 8 9 10 11 12 13 141 4 5 6 72 3 FG REVERSE 180° MATRIX CTL amp . Direction Comp Frequency Generator Current Comp Bias Brake Select Hall Bias TSD HALL U HALL VHALL W M FG MU 1 MU 2 SPIN VREF 200KO 0.1 u F 100 O 100 O 0. 44 O 1. 65 V 12V5V 0.01uF 68pF 13V 28 27 26 25 24 23 22 21 20 19 18 17 16 15 8 9 10 11 12 13 141 4 5 6 72 3 FG REVERSE 180 ° MATRIX CTL amp . Direction Comp Frequency Generator Current Comp Bias Brake Select Hall Bias TSD HALL U HALL VHALL W M FG MU 1 MU 2 SPIN VREF 200KO 0.1 u F 100 Ω 100 Ω 0. 44 Ω 1. 6 5 V 5V5V 0.01uF 68pF

Specifications subject to change without notice - 8 -  I/O circuit

Specifications subject to change without notice - 9 - Input-Output timing chart HU+ HU- FWD FWD FWDREV HV+ HV- HW- SOURCE MID SINK MID SOURCE MID SINK AB C DE FG H I J K L I) Forward Rotation mode II) Reverse Rotation brake III) Reverse protect IV) Short brakc HW+ VCSPIN U V W » » » » » »»» » » » »» » »» » »» »

Specifications subject to change without notice - 10 -  Function description 1. The short brake is switched by MU1 and MU2 pin, the operation is shown in the table as below. MU1 (pin5) MU2 (pin6) Spindle VREF＜SPIN SPIN ＜VREF L L X -- -- L H X -- -- H L O Rotating forward Short circuit brake 1 H H O Rotating forward (58%) PWM brake (58%) 2 1 Short-circuit braking mode All the spindle driver outputs are shorted out to GND when SPIN＜VREF. 2 PWM Reverse-rotation braking mode A reverse-rotation torque is applied when SPIN ＜VREF. Reverse-rotation is detected with SPIN input and Hall input. If the spindle detects reverse rotation when SPIN ＜VREF, all the outputs are shorted out to GND. 2. Torque command (SPIN: pin 10)/ output current det ection terminals (RSP: pin 25 and 26) The relationship between the differential voltage between SPIN and VREF and the torque is shown in following Figure. The voltage gain [Gvo] is 0.55[V/V]. The current gain [Gio] is 1.0[A/V](at Rs=0.5Ω, and Rin=15KΩ) in forward torque directions, and the dead zone is from 0mV to 80mV (at Rin=0) Current-gain-control and current-limit of this IC is determined with sensing resister value, and more detail control can be determined with setting a gain-resister outer this IC as below. lim1F current limit Forward Torque Reverse Torque current limit lim1F Dead zone Dead zone CTL-REF (v) Gio Gio

Specifications subject to change without notice - 11 - Table of gain formula RS[Ω] Ilim1F [A] Ilim1R [A] Gio=[A/V], Rin=15K Ω 0.50 1.1 0.64 1.00 0.75 0.73 0.43 0.67 1.00 0.55 0.32 0.5 Gio=15K/[RS*(Rin+15K)][A/V] 3. PWM carrier frequency setting PWM carrier frequency is decided by charging and discharging the capacitor that is connected to OSC Pin. The relationship with capacitors and frequency as below: Capacitor (pF) 47 56 68 82 100 150 200 Carrier Frequency (KHz) 170 150 130 118 97 70 54

Specifications subject to change without notice - 12 - 4. Voltage detection 1) Input voltage detection function IC status VM<6.6 IC disable VM>7.4 IC enable 2) Delay time capacitor IC reset time can be set by the capacitance connected to the Cd pin. tPLH =174000*C [ tPLH: transmission delay time(s), C: capacitor value(F)]. 3) Timing chart Vs 12V VM tPHL Vs IC enable

Specifications subject to change without notice - 13 -  Notice 1) Wiring for RSP Considering the wiring resistance, connect each detecting resistor as close as possible to the current detection terminals for the spindle drive RSP (pin 25, 26) of the IC. 2) 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. 3) Bypass capacitor Please connect a bypass capacitor (0.1uF) across the supply voltage lines close to the IC pins. Supply fault, ground fault, and short-circuit between output terminals. Do not short-circuit between any output pin and supply pin (supply fault) or ground (ground fault), or between any output pins (load short-ci rcuit). When mounting the IC on the circuit board, be extremely cautions about the orientation of the IC. If the orientation is mistaken, the IC may break down, and produce smoke in some cases. 4) Heat dissipation fins Heat dissipation fins are attached to the GND on the inside of the package. Make sure to connect them to the external GND. 5) Brake mode select This IC has two brake mode, PWM Reverse-rotation braking mode and Short-circuit braking mode. It is possible to select brake mode when MU2(pin6) terminal are set “H” or “L”. In this IC recommendation, Short-circuit braking mode is superior to PWM Reverse-rotation braking to reducing the power dissipation and to avoid breaking down of this IC. We suggest to take Short-circuit braking mode over 3000rpm and PWM Reverse-rotation braking mode below 3000rpm. 6) MU1 H→L setting Before MU1(pin5) terminal set are from “H” to “L”, please low down pin10(SPIN) voltage to ensure the spindle motor speed lower than 3000RPM. 7) The capacitor between RSP-GND The capacitor between RSP-GND absorbs change of steep voltage and current on account PWM drive, and suppresses disorder of VM voltage. However, if a capacitor becomes far from IC, the effect will fall under the influence of wiring impedance etc. Please arrange the capacitor between RSP-GND near the IC.

Specifications subject to change without notice - 14 -  Condition of Soldering 1). Manual Soldering Pb-free: Time / Temperature ＜ 3 sec / 400 + 10 oC （2 Times） Test Results：0 fail/ 22 tested Manual Soldering count：2 Times 2). Re-flow Soldering (follow IPC/JEDEC J-STD-020D) Classification Reflow Profile Profile Feature Pb-Free Assembly Average ramp-up rate (TL to TP) 3 oC/second max. Preheat - Temperature Min (Ts min) - Temperature Max (Ts max) - Time (min to max) (ts) 150 oC 200oC 60-180 seconds Ts max to TL - Temperature Min (Ts min) 3oC/second max. Time maintained above: - Temperature (TL) - Time (tL) 217oC 60-150 seconds Peak Temperature (TP) 260 +0/-5 oC Time with 5oC of actual Peak - Temperature (tp) 20-40 seconds Ramp-down Rate 6 oC/second max. Tme 25oC to Peak Temperature 8 minutes max. - Test Results：0 fail/ 32 tested - Reflow count：3 cycles

Specifications subject to change without notice - 15 -  Packaging outline HSOP28 SYMBOL MILLIMETERS INCHES Min. Max. Min. Max. A 2.35 2.75 0.0959 0.108 A1 - 0.3 - 0.012 A2 - 2.55 - 0.096 B 4.95 5.35 0.195 0.211 b1 0.23 0.47 0.009 0.019 C 0.2 0.36 0.008 0.014 D 17.89 18.8 0.704 0.740 E 7.3 7.9 0.287 0.311 E1 9.6 10.65 0.378 0.419 e 0.8 (TYP) 0.031(TYP) L 0.3 1.27 0.012 0.05 D E1E B b1e 1528 1 14 0.15 C AA2 C L

Specifications subject to change without notice - 16 -  Marking Identification