www.fairchildsemi.com FAN8729 Spindle+4-CH Motor Drive IC Features Description • • • • • • • • • • The FAN8729 is a monolithic integrated circuit built-in 4Channel BTL motor and spindle motor drivers, which can drive tracking actuator, focus actuator, sled motor, loading motor, 3-phase BLDC motor, and it is applicable to DVD-P/ MDP/CAR-MD/CAR-NAVIGATION systems. Built-in Power Save Circuit Built-in Current Limit Circuit Built-in Thermal Shutdown Circuit (TSD) Built-in TSD Monitor Circuit Built-in FG Signal Output Circuit Built-in Rotational Direction Detecting Circuit Built-in Protection Circuit For Reverse Rotation Built-in 4-CH Balanced Transformerless (BTL) Driver Built-in BTL MUTE Circuit (CH123 and CH4) Corresponds to 3.3V DSP Typical Application • • • • Mini Disk Player Digital Video Disk Player Car Mini Disk Player Car navigation System 48-QFPH-1414 Ordering Information Device Package Operating Temperature FAN8729 48-QFPH-1414 -35°C ~ +85°C 48-QFPH-1414 -35°C ~ +85°C FAN8729_NL* note *Note: NL: Lead free Type Rev. 1.0.0 ©2003Fairchild Semiconductor Corporation FAN8729 VM3 VM4 VREF4 44 SVCC2 45 VREF123 OUTS 46 MUTE123 INS- 47 MUTE4 INS+ 48 SS PC1 Pin Assignments 43 42 41 40 39 38 37 H1+ 1 36 NC H1- 2 35 DO4- H2+ 3 34 DO4+ H2- 4 33 DO3- H3+ 5 32 DO3+ H3- 6 31 PGND2 FAN8729 VM1 10 27 DO1+ 11 26 OPOUT 12 25 OPIN- CS1 PGND1 13 14 15 16 17 18 19 20 21 22 23 24 OPIN+ DO1- VM2 28 IN1 9 IN2 SVCC1 IN3 DO2+ IN4 29 TSD_M 8 NC DIR SGND DO2- A1 30 A2 7 A3 FG 2 FAN8729 Pin Definitions 3 Pin Number Pin Name I/O Pin Function Description 1 H1+ I Hall1(+) Input 2 H1- I Hall1(-) Input 3 H2+ I Hall2(+) Input 4 H2- I Hall2(-) Input 5 H3+ I Hall3(+) Input 6 H3- I Hall3(-) Input 7 FG O FG Output 8 DIR O Direction 9 SVCC1 - Signal VCC1 10 VM1 - BLDC Motor Power Supply 11 CS1 I Current Sensor 12 PGND1 - Power Ground1 13 A3 O 3-Phase Output 3 14 A2 O 3-Phase Output 2 15 A1 O 3-Phase Output 1 16 SGND - Signal Ground 17 NC - NC 18 TSD_M O TSD Monitor 19 IN4 I CH4 Input 20 IN3 I CH3 Input 21 IN2 I CH2 Input 22 IN1 I CH1 Input 23 VM2 - BTL CH1,2 Supply Voltage 24 OPIN+ I Normal OP-AMP Input(+) 25 OPIN- I Normal OP-AMP Input(-) 26 OPOUT O Normal OP-AMP Output 27 DO1+ O BTL Drive 1 Output(+) 28 DO1- O BTL Drive 1 Output(-) 29 DO2+ O BTL Drive 2 Output(+) 30 DO2- O BTL Drive 2 Output(-) 31 PGND2 - BTL Power Ground2 32 DO3+ O BTL Drive 3 Output(+) 33 DO3- O BTL Drive 3 Output(-) FAN8729 Pin Definitions (Continued) Pin Number Pin Name I/O Pin Function Description 34 DO4+ O BTL Drive 4 Output(+) 35 DO4- O BTL Drive 4 Output(-) 36 NC - NC 37 VREF4 I BTL CH4 Reference 38 VM4 - BTL CH4 Motor Supply 39 VM3 - BTL CH3 Motor Supply 40 SVCC2 - BTL Signal VCC 41 VREF123 I BTL CH1,2,3 Reference 42 MUTE123 I BTL CH1,2,3 Mute 43 MUTE4 I BTL CH4 Mute 44 SS I Spindle Start/Stop 45 OUTS O OP-AMP Spindle Output 46 INS- I OP-AMP Spindle Input(-) 47 INS+ I OP-AMP Spindle Input(+) 48 PC1 I Phase Compesation Cap. 4 FAN8729 H1+ 1 H1- 2 EC H2- 4 5 H3- 6 FIN(GND) 41 40 39 38 37 36 NC 35 DO4- 34 DO4+ 33 DO3- 32 DO3+ 31 PGND2 VM4 ECR 5K Absolute Values 20K VM3 Current Sense Amp 23.5dB 5K Output Current Limit FG1X Generator H3+ 42 23.5dB VM1 CS1 3 Hall Amp H2+ VREF4 43 VM4 MUTE4 44 VM3 SS 45 SVCC2 OUTS 46 VREF123 INS- 47 MUTE123 INS+ 48 FIN(GND) PC1 Internal Block Diagram 20K Detection FIN(GND) Logic VM2 FG 17.5dB Reverse Rotation 7 30 DO2- 29 DO2+ 28 DO1- 27 DO1+ 26 OPOUT 25 OPIN- 10K DIR 8 SVCC1 9 VM1 10 CS1 11 PGND1 12 20K VM2 17.5dB Distributor 10K 20K 5 A3 A2 A1 SGND NC TSD_M 19 20 21 22 23 24 OPIN+ 18 VM2 17 IN1 16 IN2 15 IN3 14 IN4 13 FIN(GND) TSD_M Driver FAN8729 Equivalent Circuits FG Signal Output Phase Compensation Capacitor 7 25 0.5K 48 2K Current Detector Start/Stop 100K 11 5K 44 25 50K 30K BTL Drive Mute 37 42 43 BTL Bias Voltage 25 50K 41 25 50 30K 6 FAN8729 Equivalent Circuits (Continued) 3-Phase Rotational Direction Output BTL Drive Output 8 27 28 20K 25 29 30 32 33 34 35 30K 3-Phase Output 15K TSD_M 13 18 14 15 BTL Input(CH1,2) BTL Input(CH3,4) 21 22 19 20 5K 25 OP-AMP Input SVCC 2K 26 24 25 1K 2K 7 10K OP-AMP Output SVCC 2K 25 1K 2K FAN8729 Absolute Maximum Ratings (Ta=25°C) Parameter Supply Voltage (Spindle Signal) Supply Voltage (BTL Signal) Supply Voltage (Spindle Motor) Supply Voltage (BTL Motor) Power Dissipation Operating Temperature Range Storge Temperature Range Maximum Output Current (Spindle Part) Maximum Output Current (BTL Part) Symbol Value Unit SVCC1max SVCC2max VM1max VM2,3,4max Pd Topr Tstg IOMAXS IOMAXB 7 15 15 15 2.7note -35 ~ +85 -55 ~ +150 1.3 1 V V V V W °C °C A A Note: 1. When mounted on the PCB (phenolic resin material) of which size is 114mm × 76mm x1.6mm. 2. Power dissipation is reduced with the rate of -21.6mW/°C for TA≥25°C. 3. Do not exceed Pd and SOA. Pd[mW] 3,000 2,000 1,000 SOA 0 0 25 50 75 100 125 150 175 Ambient Temperature, Ta[ C] Recommended Operating Conditions (Ta=25°C) Parameter Symbol Min. Type. Max. Unit Operating Supply Voltage (Spindle Signal) SVCC1 4.5 - 5.5 V Operating Supply Voltage (BTL Signal) SVCC2 4.5 - 13.2 V VM1 4.5 - 13.2 V VM2,3,4 4.5 - SVCC2 V Operating Supply Voltage (Spindle Motor) Operating Supply Voltage (BTL Motor) 8 FAN8729 Electrical Characteristics (Unless otherwise specified, Ta=25°C, SVCC1=5V, VM1=8V, BTL driver part: SVcc2=9V, VM2=5V, RL1=8Ω, VM3=8V, VM4=9V, RL2=15Ω) Parameter Symbol Condition Min. Typ. Max. Unit ICC2 Start/Stop =5V - 4.5 - mA SS On Voltage Range VSSON L-H Circuit On 2.5 - - V SS Off Voltage Range VSSOFF H-L Circuit Off - - 1.0 V 1 5 uA Circuit Current 2 START/STOP HALL AMP IHA - - Common Mode Voltage Range VHAR - 1.5 - 4.0 V Minimum In Level VINH - 60 - - mVpp 0.5 - 3.3 V Hall Bias Current TORQUE CONTROL EC Input Voltage Range EC Offset Voltage (-) ECOFF- ECR=1.65V -100 -50 -20 mV Offset Voltage (+) ECOFF+ ECR=1.65V 20 50 100 mV Input Current ECIN EC=ECR=1.65V -5 -1 - uA In/Output Gain GEC ECR=1.65V, RCS=0.5Ω 0.56 0.71 0.84 A/V FG Output Voltage (L) VFHL IFG=10uA - - 0.5 V Input Voltage Range VFGR Hn+, Hn- Input D-range 1.5 - 4.0 V Saturation Voltage (Upper TR) VOH IO= -300mA - 0.9 1.6 V Saturation Voltage (Lower TR) VOL IO=300mA - 0.2 0.6 V Torque Limit Current ITL RCS=0.5Ω 560 700 840 mA VDIRL IDIR=10uA - - 0.5 V FG OUTPUT BLOCK DIRECTION DETECTOR DIR Output Voltage (L) 9 FAN8729 Electrical Characteristics (continued) (Unless otherwise specified, Ta=25°C, SVCC1=5V, VM1=8V, BTL driver part: SVcc2=9V, VM2=5V, RL1=8Ω, VM3=8V, VM4=9V, RL2=15Ω) Parameter Symbol Condition Min. Typ. Max. Unit BTL DRIVE PART Quiescent Circuit Current ICC3 - 16.5 - mA CH MUTE123 Off Voltage VMOFF123 Pin42 = Variation - 2.5 - - V CH MUTE123 On Voltage VMON123 Pin42 = Variation - - 1.0 V CH MUTE4 Off Voltage VMOFF4 Pin43 = Variation 2.5 - - V CH MUTE4 On Voltage VMON4 Pin43 = Variation - - 1.0 V CH1,2 Actuator Driver (SVCC2=9V VM2=5V,RL1=8Ω) Output Offset Voltage VOF1,2 VIN = 1.65V -50 - +50 mV Maximum Output Voltage1,2 VOM1,2 VIN = 1.65V 3.6 4.0 - V Close Loop Voltage Gain GVC1,2 f=1kHz, VIN= -0.1Vrms 15.5 17.5 19.5 dB RR1,2 f=120Hz, VIN= -20dB - 60 - dB SR1,2 f=120Hz, 2Vp-p - 1.0 - V/us Ripple Rejection Slew Rate Ratio*note 1,2*note CH3 BTL Driver (SVCC2=9V, VM3=8V, RL2=15Ω) Output Offset Voltage3 VOF3 VIN = 1.65V -100 - +100 mV Maximum Output Voltage3 VOM3 VIN = 1.65V 6.5 7.0 - V Close Loop Voltage Gain GVC3 f= 1kHz, VIN= -0.1Vrms 21.5 23.5 25.5 dB RR3 f= 120Hz, VIN= -20dB - 60 - dB SR3 f= 120Hz, 2Vp-p - 1.0 - V/us Ripple Rejection Ratio3*note Slew Rate 3*note CH4 BTL Driver (SVCC2=9V, VM4=9V, RL2=15Ω) Output Offset Voltage4 VOF4 VIN = 1.65V -100 - +100 mV Maximum Output Voltage4 VOM4 VIN = 1.65V 7.0 7.5 - V Close Loop Voltage Gain GVC4 f= 1kHz, VIN= -0.1Vrms 21.5 23.5 25.5 dB Ripple Rejection Ratio4*note RR4 f= 120Hz, VIN= -20dB - 60 - dB Slew Rate 4*note SR4 f= 120Hz, 2Vp-p - 1.0 - V/us -20 - +20 mV OP- AMP Input Offset Voltage VOF - IB1 - - - 300 nA High Level Output Voltage VOHOP - 8 - - V Low Level Output Voltage VOLOP - - - 0.1 V ISINK - - 5.5 - mA ISOURCE - - 4.5 - mA Input Bias Current Output Sink Current Output Source Current Gain*note f= 1kHz, VIN= -75dB - 75 - dB Ripple Rejection Ratio*note RROP f= 120Hz, VIN= -20dB - 65 - dB note SROP f= 120Hz, 2Vp-p - 1 - V/us Common Mode Rejection Ratio*note CMRROP f= 1kHz, VIN= -20dB - 80 - dB Open Loop Voltage Slew Rate* GVOOP Note: Guaranteed field.(No EDS/Final test) 10 FAN8729 Application Information 1. MUTE Function • MUTE circuit turns BTL output ON/OFF. • When MUTE terminal (pin42, pin43) is OPEN, or terminal voltage is lower than 1V, BTL is disable. • When MUTE terminal (pin42, pin43) is voltage is higher than 1.5V, BTL output operates normally. • Feature Table. MUTE circuit voltage MUTE status Above 1.5V OFF Below 1V or Open ON 42 43 2. TSD Function SVCC • TSD circuit intercepts all IC output to protect the IC against high temperatures. • When chip temperature rises above 165°C, BTL and spindle output is IREF disable. Q0 • When chip temperature falls below 140°C, BTL and spindle output R2 operates normally. • TSD has hysteresis of 25°C. Output driver Bias R1 Hysteresis Ihys R3 3. TSD Monitor Function • • • • TSD monitor circuit displays TSD status. When TSD is ON, pin18 is HIGH. When TSD is OFF, pin18 is LOW. Since output pin(PIN18) is open-collector, pull-up resistance should be attached outside. • Feature Table. 11 TSD Pin18 TSD On High TSD Off Low VCC SVCC R(external) TSD 20k 18 Q6 Q5 FAN8729 4. CH1,2,3,4 Balanced Transformerless (BTL) Drive R3 Pref R3 DO+ 34 32 R2 29 27 Vin 19 20 R1 LEVEL SHIFT 21 22 37 41 M Vref123,4 35 33 DO- 30 28 Pref R3 R3 • Diagram above shows each input/output BTL channel structure. • When BTL input voltage is Vref, the output voltage is Pref. Pref has the value of VM/2. • BTL Channel’s output voltage is found as follows; R2 R3 × (1 + ) × (Vin − Vref ) R1 R3 R2 R3 Do− = Pr ef − × (1 + ) × (Vin − Vref ) R1 R3 Do+ = Pr ef + • BTL gain value is found as follows; Gain = 4 × R2 R1 12 FAN8729 5. Spindle VM1 Rcs VM1 VRCS Io VAMP ECR + + - Gain Controller - Driver M TSD EC Torque sense amp Current sense amp Power Driver • The spindle driver circuit consists of 3 section: Torque sense amp, Current sense amp, and Power driver. • Torque sense amp compares and amplifies EC and ECR signals from SERVO, and sends them to current sense amp. With voltage comparison, it determines the signal as forward or reverse. • Current sense amp limits the current in Motor(Io) by comparing output current signal from torque sense amp with the current of RCS. • Power driver output the current to the motor based on the current generated form current sense amp. • Feature Table VRNF[V] Reverse Forward Ecoff- Ecoff+ Rotation EC < ECR Forward rotation EC > ECR Stop after detecting reverse rotation 3mV -50 13 0 +50 ECR-EC[mV] FAN8729 6. Calculation of Gain & Torque Current VM1 Io Rcs VM1 Current / Voltage Convertor CS1(Pin11) - ECR + Negative Feedback loop - Vin ER Output Vs Current sense + R1 + + Driver Gm U Power Transistors + Absolute Values + Vmax VM1 Max. output current limiting Io V W Commutation Distributor H1 H2 H3 • Toque limit circuit limits the current of spindle motor. • Driver amp circuit limits the current of spindle motor by comparing the voltage detected from RCS and the voltage output from torque sense map. • Output current of the motor can be limited by adjusting the RCS value. • Maximum output current of motor is found as follows; Io[mA] = V max 350mV = Rcs Rcs • VMAX within IC is fixed at 350mV. • Gm of torque sense amp is set to 0.71. 14 FAN8729 7. Rotational Direction Detecting Function • Rotation detection circuit gives the result to DIR pin by detecting the MD’s rotational direction. • Detects the MD’s rotational direction using hall signals H2 and H3. • Feature Table. Rotation DIR EC < ECR Forward Low EC > ECR Reverse High H2+ + H2- - 8 DIR R D Q CK H3+ + H3- - D-F/F • In case of forward rotational detection, the phase of hall signal shows as H3→ H2→ H1 as follows; H1 H2 H3 (b) • In case of reverse rotational detection, the phase of hall signal shows as H1→ H2→ H3 as follows; H1 H2 H3 (a) • Forward/Reverse rotational direction is decided as follows. When hall signal H3 is falling edge, if H2 shows "High", the rotational direction is "Forward", and if H2 shows "Low", rotational direction is "Reverse". 15 FAN8729 8 Reverse Rotation Preventing Function Current S ens e Amp ECR + EC - H2+ + H2- - D H3+ + CK H3- - R Q Gain controller D-F/F Driver M • • • • Reverse rotation prevention circuit has a function for intercepting the reverse rotation of MD. When SERVO control input is EC<ECR, MD rotates forward and Q which is the output of D-F/F goes "High". When SERVO control input is EC>ECR, motor puts on reverse brake and MD speed is rapidly reduced. When SERVO control input remains EC>ECR, MD rotates reverse and Q which is the output of D-F/F goes "Low", in result current sense amp is interrupted. Accordingly gain controller goes OFF and motor is stopped. • Feature Table. Rotation H2 H3 D-F/F DIR Forward H H→L H Reverse L H→L L Reverse Rotation Preventer EC<ECR EC>ECR L Forward Brake and Stop H – Stop 16 FAN8729 8. FG Output Function • FG circuit outputs the number of motor rotation. • One pulse per rotation is output of FG. • FG uses hall signal H1 as its input, and creates output using hysteresis comparator. • Input/Output wavelength is shown below; H1 FG 17 7 FG Output H1+ + H1- - FAN8729 9. Hall Input Output Timing Chart • Output voltage and current wavelength of each of the 3-phase hall input is shown below. • The following diagram is the motor’s output wavelength in the forward rotation direction. H1+ H2+ H3+ A1 output current A1 output voltage A2 output current A2 output voltage A3 output current A3 output voltage 18 FAN8729 Typical Performance Characteristics SVCC2 vs ICC3 6.00 15.0 5.50 14.0 5.00 ICC3(mA) ICC2(mA) SVCC1 vs ICC2 4.50 4.00 13.0 12.0 11.0 3.50 3.00 10.0 4.5 4.6 4.7 4.8 4.9 5.0 5.1 SVCC1(V) 5.2 5.3 5.4 5.5 4.5 6.0 6.0 4.0 4.0 2.0 2.0 0.0 -2.0 -4.0 0.0 8.5 9.5 SVCC2(V) 10.5 11.5 12.5 13.5 0.0 -2.0 1.0 2.0 V IN1(V ) -6.0 3.0 0.0 0.5 1.0 1.5 2.0 V IN2(V ) 2.5 3.0 V IN3 vs V OUT3 (V REF=1.65V , V M3=12V ) V IN4 vs V OUT4 (V REF=1.65V , V M4=12V ) 12.0 12.0 8.0 8.0 4.0 0.0 -4.0 4.0 0.0 -4.0 -8.0 -8.0 -12.0 -12.0 0.0 0.5 1.0 1.5 2.0 V IN3(V ) 19 7.5 -4.0 VOUT4(V) VOUT3(V) -6.0 6.5 V IN2 vs V OUT2 (V REF=1.65V , V M2=5V ) VOUT2 VOUT1(V) V IN1 vs V OUT1 (V REF=1.65V , V M2=5V ) 5.5 2.5 3.0 0.0 0.5 1.0 1.5 2.0 V IN4(V ) 2.5 3.0 FAN8729 Typical Performance Characteristics SVCC2 vs GVC2 19.5 19.5 19.0 19.0 18.5 18.5 GVC2(dB) GCV1(dB) SVCC2 vs GVC1 18.0 17.5 17.0 17.5 17.0 16.5 16.5 16.0 16.0 15.5 4.5 5.5 6.5 7.5 8.5 9.5 15.5 4.5 10.5 11.5 12.5 13.5 8.5 9.5 SVCC2 vs GVC4 25.5 25.0 24.5 24.5 24.0 23.5 23.0 23.5 23.0 22.5 22.0 22.0 7.5 8.5 9.5 10.5 11.5 12.5 13.5 SVCC2(V) 10.5 11.5 12.5 13.5 24.0 22.5 6.5 7.5 SVCC2 vs GVC3 25.0 5.5 6.5 SVCC2(V) 25.5 21.5 4.5 5.5 SVCC(V) GVC4(dB) GVC3(dB) 18.0 21.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5 SVCC2(V) INS+ vs ITL (V REF=1.65V ) ITL(mA) 800 600 400 200 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 INS+(V ) 20 FAN8729 OPIN- OPOUT A A 47 46 45 44 43 42 41 40 39 38 INS+ INS- OUTS SS 2 MUTE4 MUTE123 VREF123 SVCC2 VM3 A H1+ H1- A 3 H2+ DO4+ 34 A 4 H2- DO3- A 5 H3+ DO3+ 32 A 6 H3- V A 37 VREF4 Hall Signal Generation VM4 OPIN+ A 48 1 PC1 Test Circuits NC DO4- PGND2 36 2 35 V V RL1 RL2 RL1 RL2 RL1 RL2 31 FG DO2- 30 8 DIR DO2+ 29 9 SVCC1 DO1- 28 2 V A 10 VM1 A3 SGND NC TSD_M IN4 IN3 IN2 IN1 VM2 15 16 17 18 19 20 21 22 23 V V V c b a c b b RL RL 300mA RL a OPIN- a OPIN+ c 24 A V OPIN+ A2 A1 13 OPOUT 26 OPIN25 14 PGND1 12 1 DO1+ 27 11 CS1 V 1 2 V SVCC1 300mA 1 OPOUT 7 OPIN+ OPIN- 10uF V 1M V 21 RL2 2 33 10uA VM1 RL1 FAN8729 V V 1 OPOUT VCC V 50 1M V FAN8729 CH4 Mute CH123 Mute 46 45 44 43 42 41 40 39 INS- OUTS SS MUTE4 MUTE123 VREF123 SVCC2 VM3 VREF4 System Control 47 INS+ Servo Torque Control Typical Application Circuits 0.1uF H1+ VM4 1 HALL1 38 37 VREF4 PC1 48 NC 36 2 H1- DO4- 35 3 H2+ D04+ 34 4 H2- DO3- 33 5 H3+ DO3+ 32 6 H3- PGND2 31 M Loadng M Sled Motor HALL2 HALL3 FAN8729 FG Signal Rotate Direction 7 FG DO2- 30 8 DIR DO2+ 29 9 SVCC1 DO1- 28 10 VM1 DO1+ 27 11 CS1 OPOUT 26 Focus Tracking IN1 VM2 19 20 21 22 23 OPIN+ IN2 18 OPIN25 24 VREF IN3 17 Tracking IN4 16 Sled TSD_M 15 Focus NC 14 Loading SGND 13 A3 PGND1 A1 12 A2 VM1 Servo Amp Notes: Radiation pin is connected to the internal GND of the package. 22 FAN8729 Package Dimensions 48-QFPH-1414 17.20 ±0.30 (4.85) 14.00 ±0.20 17.20 ±0.30 14.00 ±0.20 #48 #1 (0.825) 0.10MAX ° 0~8 +0.10 0.20 -0.05 2.60 ±0.10 3.00MAX 0.65 +0.10 0.30 -0.05 0.00~0.25 0.10MAX 23 0.80 ±0.20 FAN8729 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 11/4/03 0.0m 001 Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation