INTEGRATED CIRCUITS DATA SHEET TDA5147CH 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip Preliminary specification File under Integrated Circuits, IC11 1997 Jul 09 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH FEATURES • Retract circuit operates down to 2 V Spindle motor driver • Internal thermal sense circuitry with an over temperature shut down option • Internal 2 A peak current power drivers • Internal boost voltage generator • Low Rds(on) (1 Ω maximum total) for high, low and isolation drivers • Sleep mode. • Induction sense start-up option Thermal warning circuit • External current sense resistor • Output active 15 °C before general thermal shutdown. • Soft switching on both upper and lower drivers • Programmable linear or Pulse Width Modulation (PWM) spindle mode APPLICATIONS • Hard disk drive for Personal Computer products. • Provide spindle active dynamic braking mode. Voice coil motor driver GENERAL DESCRIPTION • 1.2 A VCM power driver The TDA5147CH is an ASIC combination chip that includes the following functions: • Maximum of 1 V drop across the power driver at 0.8 A • External current sense resistor, with sense amplifier spindle motor driver • External current control loop compensation voice coil motor driver • 15 kHz (typ.) VCM current control loop bandwidth retract • Three modes of operation: Power-on. – Enable VCM The circuit is contained in a 64-pin QFP package. – Retract The TDA5147CH is controlled by a custom digital ASIC (see Chapter “Application Information”). The custom ASIC provides the necessary commutation sequences for the spindle drivers via the SCNTL1, SCNTL2 and SCNTL3 inputs. Spindle speed is monitored by comparator outputs SENU, SENV and SENWIS. Motor speed control is accomplished by a PWM signal (input at pin SIPWM). – Disable • Brake after park circuitry. Power monitor and retract circuit • +5 V and +12 V power monitor threshold accuracy ±2% • Hysteresis on both power monitor comparators Control of the VCM circuits is via the VIPWMH and VIPWML input signals. These inputs provide control of the voice coil current. • Internal voltage reference: precision 2% • Buffered reference voltage output pin ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TDA5147CH QFP64 1997 Jul 09 DESCRIPTION plastic quad flat package; 64 leads (lead length 1.6 mm); body 14 × 14 × 2.7 mm 2 VERSION SOT393-1 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH QUICK REFERENCE DATA SYMBOL PARAMETER MIN. TYP. MAX. UNIT Supply voltage VCC5 analog supply voltage 1 4.5 5.0 5.5 V VCCA12 analog supply voltage 2 10.8 12 13.2 V VCCS12 power supply for spindle motor drivers 10.8 12 13.2 V VCC1V12 power supply 1 for VCM driver 10.8 12 13.2 V VCC2V12 power supply 2 for VCM driver 10.8 12 13.2 V Ispin(max) maximum spindle current − 2 − A IVCM(max) maximum VCM current − 1.2 − A Drivers 1997 Jul 09 3 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH BLOCK DIAGRAMS handbook, full pagewidth CPOR 14 VCCA12 PORN VPCNTL RETADJ 15 50 35 VDD POR12VADJ SHPWRZ 53 BRKTC VDD 16 SHPWR2,3 SHPWR1 POR DETECTOR park PARK CIRCUITRY to spindle section autopark UNDER VOLTAGE GENERATOR VCC5 POR5VADJ disable Vrefout Vref 59 VCMN 17 TDA5147CH M VCCA12 Vrefout 51 52 VCMP Rs Vrefout POWER AMPLIFIERS 60 VISENL SENSE 1 VIPWML 2 VIPWMH Vrefout PWM DECODER 6, 7 54, 55, 56 Vrefout 3 64 57 49 9 VFLTINP GNDSUBB GNDV VCC1V12 4 47 61 VFLTOUT VCMINP VISENS1 VCC5 VCC2V12 MGG845 Fig.1 Block diagram of voice coil motor driver. 1997 Jul 09 VISENH 4 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH handbook, full pagewidth VCC5 BSTCP1 BSTCP2 41 BSTFLT 29 30 UPPER BOOSTER TEMP SPWMTC 58 24 to the VCM output stages from PORN block VCCS12 28 SHPWR3 5 SHPWR2 PWM/LIN lcompare PWM disable U.H DRIVER U.H U.L SCNTL1 20 SCNTL2 21 V.H V.L LOGIC DECODER THERMAL SWITCH U.L 40 SHPWR1 23 SDRVV 10 SDRVW 25 SDRVN 27 SENV 26 SENU 18 SENWIS DRIVER brake disable brake disable V.H DRIVER Cclamp VCC5 TDA5147CH SMODE1 13 SDRVU disable W.H W.L SCNTL3 22 39 disable V.L VCC5 DRIVER brake disable COMP W.H DRIVER PWM/LIN Iset Isense control amplifier SCOMP 37 disable W.L DRIVER brake SISINK1, SISINK2 Iset PWM DECODER FILTER SIPWM 44 COMP SDRVU SPWMFLT 38 COMP Vref SDRVV Isense SISENL 46 COMP SDRVW AMP SISENH 45 Icompare Rsense COMP multiplexer 19 42 6, 7 36 8 9 54, 55, 56 SISINK2 SISINK1 GNDSUBB VCCS12 VCCA12 VCC5 GNDV MGG844 Fig.2 Block diagram of spindle motor drivers. 1997 Jul 09 5 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH PINNING SYMBOL PIN I/O DESCRIPTION VIPWML VIPWMH VFLTINP 1 2 3 I I O VFLTOUT SHPWR2 4 5 O O GNDSUBB GNDSUBB VCCA12 6 7 8 − − − VCC5 9 − SDRVW 10 O n.c. n.c. SMODE1 11 12 13 − − − CPOR 14 I/O PORN 15 O LSB PWM input MSB PWM input voice coil motor PWM filter capacitor PWM filter output voltage capacitor for park supply voltage analog ground 2 analog ground 2 analog supply voltage 2 (+12 V) analog supply voltage 1 (+5 V) phase 3 output for spindle motor not connected not connected 3 level input for spindle mode Power-on reset delay capacitor Power-on reset digital output (active LOW) adjustment of PORN threshold (for +12 V) adjustment of PORN threshold (for +5 V) digital output of back EMF sense 3/inductive sense connection 2 to the sense resistor digital input 1 for spindle decoder digital input 2 for spindle decoder digital input 3 for spindle decoder phase 2 output for spindle motor capacitor for spindle low side PWM time off centre TAP connection to spindle motor digital output of back EMF sense 1 POR12VADJ 16 I POR5VADJ 17 I SENWIS 18 O SISINK2 19 O SCNTL1 20 I SCNTL2 21 I SCNTL3 22 I SDRVV 23 O SPWMTC 24 I/O SDRVN 25 O SENU 26 O 1997 Jul 09 SYMBOL 6 PIN I/O DESCRIPTION SENV 27 O SHPWR3 28 O BSTFLT BSTCP2 n.c. n.c. n.c. n.c. RETADJ 29 30 31 32 33 34 35 O O − − − − I/O VCCS12 36 − SCOMP 37 O SPWMFLT 38 I/O SDRVU 39 O SHPWR1 40 O BSTCP1 SISINK1 41 42 O O GNDSUBA SIPWM 43 44 − I SISENH 45 I SISENL 46 I VCMINP 47 I n.c. VCC2V12 48 49 − − VPCNTL VCMP 50 51 I O Vrefout 52 O BRKTC 53 I digital output of back EMF sense 2 capacitor 3 for park supply voltage booster filter output booster capacitor 2 output not connected not connected not connected not connected retract voltage adjustment pin power supply of spindle motor drivers (+12 V) control amplifier pole adjustment capacitor for spindle PWM filter phase 1 output for spindle motor capacitor 1 for park supply voltage booster capacitor 1 output connection 1 to the sense resistor analog ground 1 digital PWM input for spindle current sense resistor for spindle current isolated ground connection for spindle sense amplifier closed loop voltage compensation of VCM not connected +12 V power supply of VCM driver park enable 3-level input positive output voltage of H-Bridge output reference for external ADC input for setting brake after park time Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TEMP 58 O handbook, full pagewidth 60 I VISENS1 61 O n.c. n.c. VCC1V12 62 63 64 − − − 49 VCC2V12 I VISENL negative output voltage of H-Bridge negative input voltage of sense resistor amplifier voltage output 1 of sense resistor amplifier not connected not connected +12 V power supply of VCM driver 50 VPCNTL 57 O 51 VCMP VISENH 59 52 Vrefout − VCMN 53 BRKTC 56 DESCRIPTION 54 GNDV GNDV I/O 55 GNDV − PIN 56 GNDV 55 58 TEMP GNDV power ground 2 of voice coil motor driver power ground 2 of voice coil motor driver power ground 2 of voice coil motor driver positive input voltage of sense resistor amplifier open collector output for early thermal warning 59 VCMN − 60 VISENL 54 61 VISENS1 GNDV 62 n.c. DESCRIPTION 63 n.c. I/O 57 VISENH SYMBOL PIN 64 VCC1V12 SYMBOL TDA5147CH VIPWML 1 48 n.c. VIPWMH 2 47 VCMINP VFLTINP 3 46 SISENL VFLTOUT 4 45 SISENH SHPWR2 5 44 SIPWM GNDSUBB 6 43 GNDSUBA GNDSUBB 7 42 SISINK1 VCCA12 8 41 BSTCP1 TDA5147CH VCC5 9 40 SHPWR1 SDRVW 10 39 SDRVU Fig.3 Pin configuration. 1997 Jul 09 7 n.c. 32 n.c. 31 BSTCP2 30 BSTFLT 29 SHPWR3 28 33 n.c. SENV 27 POR12VADJ 16 SENU 26 34 n.c. SDRVN 25 PORN 15 SPWMTC 24 35 RETADJ SDRVV 23 CPOR 14 SCNTL3 22 36 VCCS12 SCNTL2 21 SMODE1 13 SCNTL1 20 37 SCOMP SISINK2 19 n.c. 12 SENWIS 18 38 SPWMFLT POR5VADJ 17 n.c. 11 MGG842 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip mode is to drive the low drivers into saturation, because saturation reduces the power dissipation during start-up. FUNCTIONAL DESCRIPTION Spindle drivers When the spindle current reaches the value destined by the duty factor of the signal at pin SIPWM, a one-shot is fired. The output of the one-shot remains HIGH for the programmed off-time (toff) set by the RC-network at pin SPWMTC. The one-shot is not retriggerable for approximately 10% of the off-time, giving a minimum for the on-time of 0.1toff. During the off-time, the lower spindle output drivers are switched off. The on-time of the drivers is determined by the charging time of the coil current. The spindle section (see Fig.2) contains both the low and high side drivers (configured as H bridges) for a three-phase DC brushless motor. Back EMF (Electro Motive Force) sensing of the commutation rate (pin SENWIS) is an output to an external digital ASIC circuit. This circuit should provide the input commutation control as well. Consequently, all speed control, start-up routine and commutation control will be generated by the external digital circuit. The turn-off time follows: toff = R × C ln(2) With R = 68 kΩ and C = 220 pF, toff = 10.4 µs The SIPWM signal from the digital circuit is used to control the spindle current. This PWM signal is internally filtered. The output of this filter depends solely on the duty factor. The pole location of this first order low-pass filter is controlled by an external capacitor at pin SPWMFLT. CV The minimum on-time is: t on = -------I LINEAR MODE Dynamic braking is possible only during non power-down situations and must be initiated by the digital circuit. The linear mode is used when the motor is near to its intended speed. It can also be used at start-up, but higher power dissipation will occur. In the linear mode the drivers are controlled by a sensing amplifier. A Miller network is used to obtain soft switching on the lower drivers. This prevents large voltage spikes on the motor coils when the lower drivers are switching. The high drivers are switched into the linear (resistive) region. A 3- level mode line (pin SMODE1) allows for: • Induction sensing in pre-start-up (SMODE1 = 0.5VCC5 or high impedance) • PWM control during start-up (SMODE1 = 0 V) • Linear control (SMODE1 = VCC5). SENSING MODE The transconductance gain of the low driver current to filter voltage can be calculated as follows: I coil 1 1 1 V SISENH G m = ---------------------------- = ------ ---------------------------- = ------ = --- = A/V V SPWMFLT R s V SPWMFLT R s 5 The induction sensing mode can be used to sense the rotor position and to spin-up with high current. To sense the rotor position, one of the BEMF sensor outputs (pin SENWIS) will be shared with the voltage comparator that is used for the induction sensing function. Prior to start-up each phase is excited for a short period of time. The current from each coil can be monitored via the multiplexed output (SENWIS). By comparing the rise times of each phase the rotor position can be determined. For a 100% duty factor at SIPWM, the nominal voltage at SPWMFLT = 1.74 V. The calculated coil current for a 100% duty factor (sense resistors Rs = 0.33 Ω) is: 1 1 I coil = ----------- × --- × 1.74 = 1.05 A 0.33 5 Referencing to the duty factor, the coil current is: 0% duty 1 1 0% duty 1 I coil = ------ = --- × 1.74 × --------------------- = ------ ( 0.348 ) × --------------------100 Rs 5 100 Rs In cases where the spindle motor requires more current to spin-up, the sensing mode is used with the exception that the output SENWIS is ignored. The output drivers are operated in saturation in the sensing mode, so the motor current is only limited by the power supply. This condition of induction sense mode can be used to overcome the head friction and must only be used when needed. The duty factor is arranged so that at 100%, the voltage SPWMFLT = 1.74 V and at a 5% duty factor SPWMFLT = 0 V. This is to ensure that at 0% duty factor the current will be zero (allowances for circuit tolerances). The input decoder is driven by three lines which define the windings to be energized. The input decoder must then translate these lines to six lines to drive the six output drivers. The truth table is given in Table 1. The status of each block in the spindle drive section during the possible modes of operation is given in Table 4 PWM MODE The PWM mode is normally used during the start-up phase. Maximum drive voltage is applied to the low drivers to obtain high start-up torque. The purpose of the PWM 1997 Jul 09 TDA5147CH 8 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip Table 1 TDA5147CH Input decoder truth table for spindle motor drivers SCNTL1 SCNTL2 SCNTL3 SDRVU(1) SDRVV(1) SDRVW(1) Disable LOW LOW LOW x x x Dynamic brake HIGH HIGH HIGH HIGH HIGH HIGH State 1 HIGH HIGH LOW LOW x HIGH State 2 HIGH LOW LOW x LOW HIGH State 3 HIGH LOW HIGH HIGH LOW x State 4 LOW LOW HIGH HIGH x LOW State 5 LOW HIGH HIGH x HIGH LOW State 6 LOW HIGH LOW LOW HIGH x − − − x x x CONDITION Under voltage Note 1. x = high impedance. nominally 40 kHz (less than 2 degrees lag at 500 Hz), but the real pole may be adjusted by an external capacitor connected to pin VFLTINP. The filter output (pin VFLTOUT) depends on the duty factor of the PWM signals only. VCM driver The VCM driver (see Fig.1) is a linear, class AB, H-bridge type power driver with all power devices internal to the IC. In addition to the power stage a sense resistor enables the VCM current to be measured. The VCM current is controlled (see Fig.5) via two PWM signals, VIPWMH and VIPWML, that are generated by the digital circuit. The signal at pin VIPWMH weights 32 times more than the signal at pin VIPWML, thus the current is proportional to the duty factor of (VIPWML + 32 × VIPWMH). These PWM signals are filtered by using an internal 3rd-order low-pass filter (Butterworth filter).The bandwidth of this low-pass filter is Table 2 A 3-level mode line (VPCNTL) has been included that will: • Enable VCM drivers; VPCNTL = VCC5 (normal) • Disable VCM drivers; VPCNTL = 0.5VCC5 or high impedance • Park (soft retract the actuator); VPCNTL = 0 V. See Table 2 for the truth table of the VCM driver modes. VPCNTL and SCNTL modes MODES OF OPERATION AT POWER GOOD (PORN = HIGH) VPCNTL INPUT STATE(1) SCNTL INPUT STATES(1) SCNTL1 SCNTL2 SCNTL3 VCM enable VCC5 X X X VCM disable 0.5VCC5 or high impedance X X X 0V X X X Spindle enable X see Table 3 see Table 3 see Table 3 Spindle disable X LOW LOW LOW Spindle brake X HIGH HIGH HIGH Spindle mode 0.5VCC5 or high impedance LOW LOW LOW Park Note 1. X = don't care. 1997 Jul 09 9 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip ENABLE VCM DRIVERS TDA5147CH I coil G m = ------------------------------------------V VFLTINP – V refout 2I coil = ---------------------------------------------------( V VFLTOUT – V refout ) When VPCNTL equals VCC5, the VCM drivers are controlled by VIPWMH and VIPWML. Their duty factor is converted to a voltage at pin VFLTOUT. At a 100% duty factor the VFLTINP voltage is approximately 1 V above Vrefout. At a 0% duty factor the VFLTINP voltage is approximately 1 V below Vrefout. At a 50% duty factor, the voltage level is equal to Vrefout (typically 4 V). The VFLTINP voltage is amplified, filtered and output at VFLTOUT. The voltage at VFLTOUT varies between ±2 V about Vrefout. The VFLTOUT voltage, in conjunction with the sense resistor amplifier, drives the two VCM drivers as illustrated in Fig.4. The equation describing the transconductance from VFLTINP to Icoil is: 1 R2 1 = 2 × ----------- × -------- × -------- A/V gain R1 RS In a typical application: I coil 2 6.6 kΩ 1 -------------------------------------------- = --- × ------------------ × ----------- = 1 A/V V FLTINP – V refout 4 10 kΩ 0.33 The transconductance is variable by selecting external resistors R2/R1 and sense resistors RS. handbook, full pagewidth Vrefout R R 4 VFLTOUT VIPWML 1 VIPWMH 2 PWM DEC VFLTINP 3 BUFFER R1 Vrefout VCMINP 45 59 VCMN R ICOIL R R2 0.5 VCCV12 4R VISENS1 61 51 VCMP V1 R RS 60 VISENL 57 VISENH V1 R 4R Vrefout Fig.4 Transconductance model. 1997 Jul 09 10 MGG846 M voice coil motor Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip DISABLE VCM DRIVERS TDA5147CH The calculation of VRETRACT is as follows: R1 + R2 R2 V RETRACT = V BE × ---------------------- + ---------------- R1 50 kΩ With the VPCNTL signal at 0.5VCC the VCM drivers are disabled while the rest of the circuits remain enabled. A sleep mode is initiated when the spindle and VCM are disabled (this places the TDA5147CH in its lowest power setting). VBE = 0.65 V at 25 °C and ∆VBE/∆T = −2 mV/°C, 50 kΩ can vary by ±30%. It should be noted that R2 has to be less than 10 kΩ. Pin RETADJ can be pulled to ground by applying 0.7 V (VBE) on pin BRKTC. This is used to perform spindle brake during power down. ACTUATOR PARK Retracting the actuator can be accomplished by driving VPCNTL LOW in conjunction with either the spindle turning or a brake voltage has been applied. An adjustable retract voltage of 1.2 V (max.) is applied between the VCMN and VCMP outputs. The retract circuit obtains its retract current from the spindle BEMF (pins SHPWR2 and SHPWR3). When pin 35 (RETADJ) is pulled to ground, no regulation of the VCMN is taking place, but the VCMP output is still kept LOW. In that case, the SHPWR2 and SHPWR3 lines are loaded with the VCM motor by means of an internal MOS transistor. The retract voltage is determined by two external resistors. One end is connected to pin VCMN and the other to ground. The common point is connected to pin RETADJ (see Fig.8 for additional information). Vref handbook, full pagewidth VIPWMH VIPWML LEVEL CONVERTOR LEVEL CONVERTOR UNITY GAIN LOW-PASS SUM VFLTOUT 32 : 1 ATTENUATION MBH019 Fig.5 Block diagram of the VCM driver PWM filter. Table 3 Booster, spindle drivers, comparator, decoder, amplifier and filter modes UPPER BOOSTER UPPER DRIVERS LOWER DRIVERS COMPARATOR CONTROL AMPLIFIER Spindle enable ON ON ON ON ON Spindle disable ON ON ON ON ON PORN LOW OFF OFF ON ON OFF Sleep OFF OFF ON ON OFF FUNCTION 1997 Jul 09 11 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip During a power-down situation the Power-on reset circuit must not only generate a PORN output signal, but must also activate the VCM retract circuitry. In doing so, the VCM driver draws power from SHPWR2 and SHPWR3 during spin-down, and uses this power to bias the VCM against one of the hard stops of the actuator. This prevents the heads from landing on data zones. This BEMF supply is isolated from the supply voltage for the drive, and is half-wave rectified. An external retract capacitor is used to provide the supply voltage for the retract circuit (SHPWR1). Power-on reset The Power-on reset circuit monitors the voltage levels of both the +5 V and the +12 V supply voltages as shown in Fig.6. The PORN (active LOW) logic line is set HIGH following a supply voltage rise above a specified voltage threshold plus a hysteresis, and delayed by a time tC that is controlled by an external capacitor. This PORN signal should remain HIGH until either the +5 or +12 V supplies drop below the voltage threshold, at which point the PORN line should be asserted LOW. The tC timing is set by the following equation: tC It should be noted that in both power-down retract and command retract situations, the voltage across the VCM can be adjusted (RETADJ pin) to limit the velocity of the actuator. C × V th = -----------------I Where Vth = 2.5 V and I is 12 µA (typ.). The status of both the VCM driver blocks and the spindle driver blocks is shown in Tables 5 and 6. A negative going pulse width of 5 µs on either the +5 or +12 V rail will provide a full output pulse. If another trigger pulse occurs before the output is completed a new output pulse will be originated. This implies the Power-on reset circuit is a retriggerable one-shot with a maximum trigger pulse of 5 µs (see Fig.7). handbook, full pagewidth VCC TDA5147CH Vhys MGG848 threshold 0.8 V t PORN tC tC t Fig.6 Power-on reset timing. 1997 Jul 09 12 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH SLEEP MODE threshold VCC A sleep mode is used to save power when the spindle drivers and the VCM drivers are in a disabled state. These two conditions automatically turn off all drivers and amplifiers that are not required. The total power dissipation is approximately 100 mW. The sleep mode is activated when both the spindle (SCNTL1, 2 and 3 are LOW) and the VCM are disabled (VPCNTL left open-circuit). hysteresis 1V slopes 1 µs/V 5 µs THERMAL SHUTDOWN PORN When the TDA5147CH junction temperature is greater than 150 °C all power drivers will be automatically disabled. This is to ensure that no fire hazard occurs due to chip overheating. tC MGG849 Fig.7 Trigger pulse requirement. 1997 Jul 09 13 ONE-SHOT CURRENT COMPARATOR PWM DECODER FILTER SMODE COMPARATOR CURRENT SENSE AMPLIFIER LOGIC DECODER Spindle enable ON ON ON ON ON ON Spindle disable ON ON ON ON ON ON PORN LOW ON ON ON ON OFF ON Sleep ON ON ON ON OFF ON FUNCTION Table 5 VISREF, PWM, power, PORN and retract modes VISREF BUFFER PWM DECODER 12 V AND 5 V COMPARATOR FILTER AMPLIFIER PORN DETECTOR RETRACT CIRCUIT VCM enable ON ON ON ON ON OFF VCM disable ON ON ON ON ON OFF Park ON ON ON ON ON ON Sleep OFF OFF ON OFF ON OFF PORN LOW OFF OFF ON OFF ON ON FUNCTION 14 Table 6 Reference, sense, thermal, voltage and sleep modes 3 LEVEL VOLTAGE Vref OUTPUT BUFFER Vref OUTPUT SENSE2 SENSE1 VCM POWER AMPLIFIER VCM enable ON ON ON ON ON ON ON ON OFF VCM disable ON ON ON ON ON OFF ON ON OFF(2) Park(1) ON ON ON ON ON OFF ON ON OFF Sleep ON OFF OFF OFF OFF OFF ON ON ON(3) PORN LOW ON OFF OFF OFF OFF OFF ON ON ON FUNCTION VOLTAGE THERMAL GENERATOR SHUTDOWN SLEEP FUNCTION 3. Requires SP disable and VCM disable to be ON. TDA5147CH 2. If SP disable is OFF. Preliminary specification Notes 1. Park will provide adjustable retract if the spindle brake is on, or if the spindle brake is enabled. Philips Semiconductors One-shot, comparators, filter, amplifier and logic decoder modes 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip 1997 Jul 09 Table 4 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VCC5 VCCA12 PARAMETER analog supply voltage 1 analog supply voltage 2 CONDITIONS indefinite time period indefinite time period VSDRVU, VSDRVV, output voltage spindle motor driver VSDRVW and MIN. MAX. UNIT −0.3 +6.0 V −0.3 +7.0 V −0.3 +13.5 V −0.3 +15.0 V −0.3 +20 V VSDRVN Vn output voltage on other pins −0.3 − V Tstg IC storage temperature −55 +125 °C Tj maximum junction temperature − +150 °C Tamb operating ambient temperature 0 +70 °C HANDLING Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is desirable to take normal precautions appropriate to handling MOS devices. THERMAL CHARACTERISTICS SYMBOL Rth j-a 1997 Jul 09 PARAMETER CONDITIONS thermal resistance from junction to ambient 15 in free air VALUE UNIT 28 K/W Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH CHARACTERISTICS Operating characteristics VCC5 = 5 V; VCCS12 = VCCA12 = VCCV12 = 12 V; Tamb = 0 to 70 °C. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supplies VCC5 analog supply voltage 1 4.5 5 5.5 V VCCS12 supply voltage for spindle motor drivers 10.8 12 13.2 V VCCV12 supply voltage for VCM driver 10.8 12 13.2 V VCCA12 analog supply voltage 2 10.8 12 13.2 V Upper booster CAPCP external output capacitor connected between BSTCP1 and BSTCP2 − 10 − nF CCAPFLT charge pump capacitor connected between BSTFLT and ground − 22 − nF Spindle low side; pin SPWMTC Csl capacitor for spindle low side − 220 − pF Rsl resistor for spindle low side − 68 − kΩ − 22 − µF Capacitors for park voltage supply; pins SHPWR2 and SHPWR3 Cclamp clamp capacitor Digital PWM input; pin SIPWM VIH HIGH level input voltage 3 5 5.5 V VIL LOW level input voltage −0.3 0 +2 V − − V 0.75VCC5 + 0.15 − − V 0.25VCC5 + 0.15 0.50VCC5 0.75VCC5 − 0.15 V − − 0.25VCC5 − 0.15 V − 47 − nF 0.75VCC5 + 0.15 − − V 0.25VCC5 + 0.15 0.50VCC5 0.75VCC5 − 0.15 V − − 0.25VCC5 − 0.15 V Digital inputs of spindle decoder; pins SCNTL1, SCNTL2 and SCNTL3 VIH HIGH level input voltage see Table 1; VCC5 = 5 V 3.5 3 level input; pin SMODE1 Voh voltage level for current sense in non PWM mode VTRI voltage level for BEMF sense and PWM switch control Vol voltage level for BEMF sense and linear control state also achieved with floating input Control amplifier; pin SCOMP CSCOMP control loop capacitor Park enable; pin VPCNTL Voh voltage level for enable VTRI voltage level for disable Vol voltage level for retract 1997 Jul 09 state also achieved with floating input 16 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip SYMBOL PARAMETER TDA5147CH CONDITIONS MIN. TYP. MAX. UNIT PWM decoder; pins VIPWML and VIPWMH VIH HIGH level input voltage − 3.0 − V VIL LOW level input voltage − − 2.0 V fPWM frequency range at the inputs of CFLTINP = 1.8 nF the PWM − − 625 kHz TPWM PWM pulse width 25 − − ns Sense resistor amplifier; pins SISENL and SISENH VCS common mode input sense voltage 0 − 2 V RSENSE spindle sense resistor − 0.33 − Ω − 220 − nF − 1.8 − nF − 0.33 − Ω Power-on reset generator CPORN Power-on reset capacitor see Fig.6 VCM PWM filter CVFLTINP filter capacitor VCM driver RSENSE VCM sense resistor Electrical characteristics VCC5 = 5 V; VCCS12 = VCCA2 = VCCV = 12 V; Tamb = 0 to 70 °C. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Analog supply current (nominal voltage) ICC5 ICC12 PDISS analog supply current 1 analog supply current 2 total power dissipation linear (no spindle or VCM load) − 5.0 8.0 mA sleep mode (no spindle or VCM load) − 3.0 − mA linear (no spindle or VCM load) − 15 33 mA sleep mode (no spindle or VCM load) sense resistor output − 2.3 − mA sleep mode (no spindle or − VCM load) sense resistor input 6.0 − mA sleep mode − − 150 mW 18.2 19.2 19.8 V 1.5 − mA Voltage booster; pin BSTFLT VwCP charge pump output voltage nominal voltages ICHARGE charge pump output current voltage drop of 100 mV across − booster 1997 Jul 09 17 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip SYMBOL PARAMETER TDA5147CH CONDITIONS MIN. TYP. MAX. UNIT Power monitor comparators; pins POR5VADJ and POR12VADJ Vt12 threshold voltage level adjustment for +12 V 8.7 9.0 9.3 V Vt5 threshold voltage level adjustment for +5 V 4.4 4.5 4.6 V HV5 hysteresis on VCC5 comparator hysteresis in positive direction. 30 70 110 mV HV12 hysteresis on VCCA12 comparator hysteresis in positive direction. 120 200 280 mV V12adj Power-on reset 12 V adjustable voltage normal power supply to resistor divider 25.4 kΩ and 9.7 kΩ 3.25 3.32 3.39 V V5adj Power-on reset 5 V adjustable voltage normal power supply to resistor divider 7.86 kΩ and 10 kΩ 2.74 2.8 2.86 V Power-on reset generator; pins CPOR and PORN VOL LOW level input voltage IOL = 2 mA; VCC = 5 or 12 V (below threshold voltage) − − 0.5 V VOH HIGH level input voltage VCC = 5 or 12 V (above hysteresis voltage) 4.85 − − V ICPOR source current for charging capacitor 8.2 12 15.3 VCPOR threshold voltage − 2.5 − V tdPORN Power-on reset delay capacitance = 220 nF − 45 − ms tRPULSE power supply maximum pulse duration see Fig.7 − 2.5 5.0 µs Thermal protection TSOFF switch-off junction temperature 150 − 164 °C ∆T thermal hysteresis − 30 − °C Thermal warning; pin TEMP Twarn warning temperature gives a warning 15 °C before TSOFF − TSOFF − 15 − °C VOL output voltage IOut = 500 µA − − 1.2 V IIH leakage current when output collector is ‘off’ VOut = 5 V 10 − − µA 1997 Jul 09 18 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH Spindle motor driver characteristics VCC5 = 5 V; VCCS12= VCCA12 = VCCV12 = 12 V; Tamb = 0 to 70 °C. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Overvoltage protection; pins SDRU, SDRV and SDRW VCLP overvoltage protection clamping voltage power supply off; apply voltage to outputs; check clamping voltage is at 100 mA − 19 − V −10 − +10 µA Spindle state control inputs; pins SCNTL1 SCNTL2 and SCNTL3 Iin input current Back EMF comparators VCM common mode input voltage for centre tap connection (SDRVN) comparators will be −0.5 operational with other inputs at VCCA2 − 1 V − VCCA2 + 0.7 V ICLP common mode clamping current VSDRVN at 0 V −1.6 − −0.2 mA VCOS comparator offset voltage relative to SDRVN SDRVN voltage range from 3 to 10 V −5 − +5 mV ∆VCOS variation in comparator voltages for the same IC −7 − +7 mV Vsink comparators output drive sink voltage Io(sink) = 1 mA − − 0.5 V Vsource comparators output drive source voltage Io(source) = 40 µA 2.7 − − V ISDRV = 1 A at Tamb = 25 °C − 0.8 1.0 Ω ISDRV = 1 A at Tj = 125 °C − 1.3 1.7 Ω Spindle output drivers; pins SDRVU, SDRVV and SDRVW Rds(on) total resistance at output (source + sink + isolation) IDSX off-state output leakage current disable state Tj = 125 °C − 0.3 1.0 mA LIN recirculating diode forward voltage ISDRV = 1 A − 0.8 1.1 V SRT slew rate test test for Miller network 0.11 − 0.27 V/µs −200 − +200 mA 23 34 45 KΩ Spindle current control PWM DAC and filter; pins SIPWM and SPWMFLT LIN input current at SIPWM RSOUT output resistance at SPWMFLT VSOUT SPWMFLT voltage 1997 Jul 09 at HIGH-to-LOW voltage transition 100% duty factor SIPWM − 1.75 − V 50% duty factor at SIPWM − 0.85 − V 0% duty factor at SIPWM − 0 − V 19 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip SYMBOL PARAMETER TDA5147CH CONDITIONS MIN. TYP. MAX. UNIT PWM one-shot; pin SPWMTC Isk output sink current Vo = 3 V 600 850 1100 µA Isc output source current Vo = 1 V − −12 − µA VthST threshold voltage start level voltage for discharging 2.0 2.56 3.0 V VthEND threshold voltage end level voltage for charging 0 0.1 0.2 V tOFF one-shot off time external network of R = 68 kΩ and C = 220 pF 8 10 12 µs tON(min) one-shot minimum on time external network of R = 68 kΩ and C = 220 pF 1 − − µs 0 − 3.0 V −10 − − µA Current control loop and sense amplifier; pins SISENH and SCOMP Vi current sense amplifier common mode input voltage ISENSE current sense amplifier input current KSP voltage ratio between SPWMFLT and SISENH over sense resistance = 0.1 to 1 Ω 4.9 5.0 5.1 V/V VSENSH output voltage at SENSH for 100% duty factor; Rs = 0.33 Ω 0.324 0.342 0.36 V for 50% duty factor; Rs = 0.33 Ω − 0.174 − V for 5% duty factor; Rs = 0.33 Ω 0 0.018 0.026 V for 0% duty factor; Rs = 0.33 Ω 0 0 1.0 mV 5 − kHz BWD 1997 Jul 09 current sense amplifier operational over range current loop bandwidth for Rs = 0.33 Ω, Lmotor = 1 mH, SPWMFLT to motor current Rmotor = 12.0 Ω 20 3 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH Voice coil motor driver characteristics VCC5 = 5 V; VCCS12 = VCCA12 = VCCV12 = 12 V; Tamb = 0 to 70 °C. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Retract control voltage; pins VCMN and VCMP − 3.0 − µA retract capacitor = 2.2 µF 5 − − s nominal power supply at Tamb = 25 °C, pin 35 open 0.8 1.1 1.4 V power supply off; VSDRVU = 9 to 2 V; VSHPRW1 = 7.5 V, pin 35 open 0.8 1.1 1.4 V IBRK1 power supply off; SHPWR1 = 8 V; SHPWR2, 3 = 4 V; RETADJ = 0 V; RLOAD(VCM) = 10 Ω 120 − − mA IBRK2 power supply off; SHPWR1 = 6.5 V; SHPWR2, 3 = 2 V; RETADJ = 0 V; RLOAD(VCM) = 10 Ω 50 − − mA IRET retract voltage load current VSHPWR1 = 9 V; power supplies off tRET retract voltage hold time (power down) VRET retract voltage regulation IBRAKE VCM current control PWM DAC; pins VIPWMH, VIPWML and VFLTINP ILIN input current VIPWMH,VIPWML voltage range 0 to 5 V −200 − +200 µA VFL(p) positive full-scale DAC output voltage VFLTINP − Vrefout 100% duty factor − +1.0 − V FLI(n) negative full-scale DAC output voltage VFLTINP − Vrefout 0% duty factor − −1.0 − V current ratio between MSB and LSB 31.5 32 32.5 output impedance from VFLTINP to Vrefout 1.40 2.0 2.6 ZO 1997 Jul 09 21 kΩ Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip SYMBOL PARAMETER TDA5147CH CONDITIONS MIN. TYP. MAX. UNIT VCM PWM filter; pins VFLTINP and VFLTOUT Io(VFLTOUT) output current on VFLTOUT VFLTOUT = ∆Vo + 10 mV 500 − − µA ∆Φ maximum phase shift from VFLTINP to VFLTOUT measured at 500 Hz; Cfilter = 1.8 nF − − 2 deg fco filter cut-off frequency from VFLTINP to VFLTOUT − 40 − kHz att filter attenuation at 1 MHz measured from VFLTINP to VFLTOUT − 70 − dB VFLTOUT output voltage range measured at VFLTOUT, with VIPWML and VIPWMH 0% duty factor V − 2.08 V − 2.0 V − 1.92 V 50% duty factor V − 0.06 V V + 0.06 V 100% duty factor V + 1.92 V + 2 V + 2.08 V Io = 4 mA; CL = 10 nF 3.8 4.0 4.2 V −200 +415 +540 µA Reference voltage; pin Vrefout Vref(o) output reference voltage Current Sense Amplifier; pins VISENS1, VISENL and VISENH ISEN input current at VISENL, VISENH overvoltage range of 0 to 12 V Isk1 output sink current 1 VISENS1 force VISENH - VISENL to equal 400 −250 mV; allow output drop of 100 mV between no load and full load − − µA Is1 output source current 1 VISENL force VISENH - VISENL to equal 400 250 mV; allow output drop of 100 mV between no load and full load − − µA VR1 operating voltage range VISENL, VISENH gain and offset valid 0 − 12 V G1 amplifier gain for V ISENS1 – V refout ------------------------------------------V ISENS1 – V ISENL under all conditions 3.8 4.0 4.2 Vos1 output offset voltage VISENH − VISENL = 0 V at 0.5VCC −15 − +15 mV BW1 unity gain bandwidth − 10 − MHz PSRR power supply rejection ratio fi < 20 kHz − 60 − dB 0.4 0.7 Brake after park function; pins BRKTC and RETADJ VBRAKE BRKTC level to perform brake action IBRKTCON BRKTC input current during power ‘on’ VBRKTC = 0.4 V 300 − − µA IRETADJON RETADJ current during power ‘on’ VRETADJ = 0.4 V − − 10 µA VRETADJOFF low level output voltage on RETADJ power ‘OFF’ VCC5 = 0 V; SHPWR2 = 5 V; VCC12 = 0 V; IRETADJ = 400 µA − − 0.5 V 1997 Jul 09 22 V Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip SYMBOL PARAMETER TDA5147CH CONDITIONS MIN. TYP. MAX. UNIT VCM output drivers; pins VCMP, VCMN and VCMINP Tamb = 25 °C − 1.0 RDSON125 total output resistance (source + sink + isolation) Tj = 125 °C − ILK output leakage current Tj = 125 °C − BW unity gain bandwidth from VCMINP to VCMP, VCMN RDSON25 1.25 Ω 1.5 1.9 Ω − 1 mA − 2 − MHz µs tcro crossover distortion time ramp input VCMINP = 20 µs − 2 5 I2 RATIO = ---I1 symmetry of VCM drivers VCMP, VCMN I2 = IRVCM at duty factor = 10%; I1 = IRCVM at duty factor = 90%; RS = 0.33 Ω; R1 = 10 kΩ, R2 = 6.6 kΩ, RL = 15 Ω 0.93 1 1.07 I2 – I1 L = -------------I1 – I0 linearity of VCM drivers VCMP, VCMN I2 = IRVCM at duty factor = 10%; I1 = IRCVM at duty factor = 90%; I0 = IRCVM at duty factor = 50%; RS = 0.33 Ω; R1 = 10 kΩ, R2 = 6.6 kΩ, RL = 15 Ω 0.97 1 1.07 Ios VCM output offset current VIPWMH, VIPWML at 50% duty factor; RS = 0.33 Ω; RL = 15 Ω; R1 = 10 kΩ, R2 = 6.6 kΩ −28 0 +28 mA IIND input current VCMINP Vi = 0 to 10 V − 0.07 0.2 µA VOS1 input offset voltage VCMINP from VCMINP to Vrefout −10 − +10 mV Notes 1. VCCA12, VCCV12, VCCS12 and VCC5 are connected together; the outputs SDRVU, SDRVV, SDRVW, VCMP and VCMN are not loaded. Sleep mode defined by 000 as spindle code and VCM disable. 2. Switching levels with respect to SDRVU, SDRVV and SDRVW. 3. For the description of the Power-on reset see Fig.6. 4. On spindle motor drivers: a) Zero duty factor guarantees zero current output. b) 5% duty factor guarantees current output. c) Maximum current will be activated at 100% duty factor. 5. 0.2 V < VSDRVN < VCCA12 − 1 V. 1997 Jul 09 23 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH EQUATIONS Gain from VFLTINP to VFLTOUT: V FLTOUT – V refout --------------------------------------------- = 2 V FLTINP – V refout (1) Gain from VFLTOUT to VISENS1 (under closed loop VCMINP = Vrefout): V FLTOUT – V refout R1 V FLTOUT – V refout V ISENS1 – V refout --------------------------------------------- = ------------------------------------------- or --------------------------------------------- = ------R1 R2 V SENS1 – V refout R2 Gain of VISENS1 relative to ∆ Vs (voltage across Rs): V1 – V refout V ISENH V1 – V SENS1 V ISENL HAVE ----------------------------- = ------------------- --------------------------------- = ----------------R 4R 4R R (3) 1 – V refout V ISENL – V ISENH ∆V s V SENS1 – V refout SUB ------------------------- = -------------------------------------------- = ---------- or ------------------------------------------ = 4 ∆V s 4R R R Transconductance equation: I coil ∆V s 1 G m = -------------------------------------------- = ---------- × ------------------------------------------V FLTINP – V refout R s V FLTINP – V refout ∆V s From equation (1): G m = ---------Rs (4) (5) 2 --------------------------------------------V FLTOUT – V refout ∆V s R2 From equation (2): G m = ---------- × 2 × ------- ( V SENS1 – V refout ) R1 Rs 1 1 R2 1 1 R2 From equation (3) and (4): G m = ------ × --- × 2 × ------- = --- × ------ × -------Rs 4 R1 2 R s R1 1997 Jul 09 (2) 24 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH APPLICATION INFORMATION handbook, full pagewidth TDA5147CH PORN POWER-ON RESET VPCNTL PARK VIPWML, VIPWMH DIGITAL CIRCUIT VOICE COIL MOTOR DRIVE ACTUATORS SCNTL1 to 3, SIPWM SPINDLE MGG847 SENU, SENV, SENWIS No external power drivers; dynamic braking for non-power down situations; 2A spindle current; 1.2 A VCM power driver; full-wave spindle mode, PORN monitors for both 5 and 12 V supplies; auto-park in the event of power-down; Auto-brake after park in case of power down. Fig.8 System block diagram. 1997 Jul 09 25 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip 12 V handbook, full pagewidth TDA5147CH 5V CFLT 0.47 µF n.c. Vrefout 8 64 49 36 9 29 BSTCP2 BSTCP1 BSTFLT VCC5 VCCS12 VCC2V12 VCMN VCC1V12 VCCA12 CCP 41 30 17 52 RETADJ 35 SPWMFLT 38 SPWMTC 24 PORN BRKTC 16 14 3 15 61 53 4 47 SENWIS SENV SENU TEMP 27 60 26 57 TDA5147CH 59 58 19 SCNTL2 SCNTL3 SMODE1 SIPWM 50 20 23 21 39 22 VISENS1 CPOR VFLTOUT VCMINP VCMP VISENL voice M coil motor VISENH VCMN SISINK2 SISINK1 spindle motor SDRVV SDRVU RSENSE 46 GNDV 54, 55, 56 6, 7 5 28 37 (1) Optional. Fig.9 Application diagram. 26 SISENL 40 CCLAMP 1997 Jul 09 CPOR VFLTINP 13 44 SHPWR1 SCNTL1 POR12VADJ SISENH 45 SDRVW 10 SDRVN 25 2 SCOMP VPCNTL SHPWR3 VIPWMH 42 1 SHPWR2 VIPWML digital circuit 51 GNDSUBB VCC5 18 POR5VADJ MGG843 (1) (1) Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH PACKAGE OUTLINE QFP64: plastic quad flat package; 64 leads (lead length 1.6 mm); body 14 x 14 x 2.7 mm SOT393-1 c y X A 48 33 49 32 ZE e Q E HE A A2 (A 3) A1 θ wM Lp bp pin 1 index L 17 64 detail X 16 1 w M bp e v M A ZD D B HD v M B 0 5 10 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e mm 3.00 0.25 0.10 2.75 2.55 0.25 0.45 0.30 0.23 0.13 14.1 13.9 14.1 13.9 0.8 HD HE L 17.45 17.45 1.60 16.95 16.95 Lp Q v w y 1.03 0.73 1.4 1.1 0.16 0.16 0.10 Z D (1) Z E (1) 1.2 0.8 1.2 0.8 θ Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT393-1 1997 Jul 09 REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE 94-06-22 96-05-21 MS-022 27 o 7 0o Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip If wave soldering cannot be avoided, the following conditions must be observed: SOLDERING Introduction • A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. • The footprint must be at an angle of 45° to the board direction and must incorporate solder thieves downstream and at the side corners. Even with these conditions, do not consider wave soldering the following packages: QFP52 (SOT379-1), QFP100 (SOT317-1), QFP100 (SOT317-2), QFP100 (SOT382-1) or QFP160 (SOT322-1). This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “IC Package Databook” (order code 9398 652 90011). During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Reflow soldering Reflow soldering techniques are suitable for all QFP packages. The choice of heating method may be influenced by larger plastic QFP packages (44 leads, or more). If infrared or vapour phase heating is used and the large packages are not absolutely dry (less than 0.1% moisture content by weight), vaporization of the small amount of moisture in them can cause cracking of the plastic body. For more information, refer to the Drypack chapter in our “Quality Reference Handbook” (order code 9397 750 00192). Maximum permissible solder temperature is 260 °C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 °C within 6 seconds. Typical dwell time is 4 seconds at 250 °C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. Repairing soldered joints Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 °C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 °C. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 °C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 °C. Wave soldering Wave soldering is not recommended for QFP packages. This is because of the likelihood of solder bridging due to closely-spaced leads and the possibility of incomplete solder penetration in multi-lead devices. 1997 Jul 09 TDA5147CH 28 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip TDA5147CH DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. 1997 Jul 09 29 Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip NOTES 1997 Jul 09 30 TDA5147CH Philips Semiconductors Preliminary specification 12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip NOTES 1997 Jul 09 31 TDA5147CH Philips Semiconductors – a worldwide company Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. 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No. 5, 80640 GÜLTEPE/ISTANBUL, Tel. +90 212 279 2770, Fax. +90 212 282 6707 Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7, 252042 KIEV, Tel. +380 44 264 2776, Fax. +380 44 268 0461 United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes, MIDDLESEX UB3 5BX, Tel. +44 181 730 5000, Fax. +44 181 754 8421 United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409, Tel. +1 800 234 7381 Uruguay: see South America Vietnam: see Singapore Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD, Tel. +381 11 625 344, Fax.+381 11 635 777 For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 Internet: http://www.semiconductors.philips.com © Philips Electronics N.V. 1997 SCA55 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands 297027/1200/01/pp32 Date of release: 1997 Jul 09 Document order number: 9397 750 01425