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FAN8729
Spindle+4-CH Motor Drive IC
Features
* * * * * * * * * * 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
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.
48-QFPH-1414
Typical Application
* * * * Mini Disk Player Digital Video Disk Player Car Mini Disk Player Car navigation System
Ordering Information
Device FAN8729 FAN8729_NL*
note
Package 48-QFPH-1414 48-QFPH-1414
Operating Temperature -35C ~ +85C -35C ~ +85C
*Note: NL: Lead free Type
Rev. 1.0.0
(c)2003Fairchild Semiconductor Corporation
FAN8729
Pin Assignments
MUTE123
VREF123
MUTE4
SVCC2
INS+
INS-
OUTS
VM3
PC1
48 H1+ 1
47
46
45
44
43
42
41
40
39
VM4
38
37 36 NC
H1-
2
VREF4 35
SS
DO4-
H2+
3
34
DO4+
H2-
4
33
DO3-
H3+
5
32
DO3+
H3-
6
31
PGND2
FAN8729
FG 7 30 DO2DIR 8 29 DO2+ SVCC1 9 28 DO1-
VM1
10
27
DO1+
CS1
11
26
OPOUT
PGND1
12 13 A3 14 A2 15 A1 16 SGND 17 NC 18 TSD_M 19 IN4 20 IN3 21 IN2 22 IN1 23 VM2 24 OPIN+
25
OPIN-
2
FAN8729
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Pin Name H1+ H1H2+ H2H3+ H3FG DIR SVCC1 VM1 CS1 PGND1 A3 A2 A1 SGND NC TSD_M IN4 IN3 IN2 IN1 VM2 OPIN+ OPINOPOUT DO1+ DO1DO2+ DO2PGND2 DO3+ DO3I/O I I I I I I O O I O O O O I I I I I I O O O O O O O Hall1(+) Input Hall1(-) Input Hall2(+) Input Hall2(-) Input Hall3(+) Input Hall3(-) Input FG Output Direction Signal VCC1 BLDC Motor Power Supply Current Sensor Power Ground1 3-Phase Output 3 3-Phase Output 2 3-Phase Output 1 Signal Ground NC TSD Monitor CH4 Input CH3 Input CH2 Input CH1 Input BTL CH1,2 Supply Voltage Normal OP-AMP Input(+) Normal OP-AMP Input(-) Normal OP-AMP Output BTL Drive 1 Output(+) BTL Drive 1 Output(-) BTL Drive 2 Output(+) BTL Drive 2 Output(-) BTL Power Ground2 BTL Drive 3 Output(+) BTL Drive 3 Output(-) Pin Function Description
3
FAN8729
Pin Definitions (Continued)
Pin Number 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Pin Name DO4+ DO4NC VREF4 VM4 VM3 SVCC2 VREF123 MUTE123 MUTE4 SS OUTS INSINS+ PC1 I/O O O I I I I I O I I I Pin Function Description BTL Drive 4 Output(+) BTL Drive 4 Output(-) NC BTL CH4 Reference BTL CH4 Motor Supply BTL CH3 Motor Supply BTL Signal VCC BTL CH1,2,3 Reference BTL CH1,2,3 Mute BTL CH4 Mute Spindle Start/Stop OP-AMP Spindle Output OP-AMP Spindle Input(-) OP-AMP Spindle Input(+) Phase Compesation Cap.
4
FAN8729
Internal Block Diagram
MUTE123
FIN(GND)
MUTE4
VREF123
SVCC2
INS+
INS-
OUTS
PC1
48
47
46
45
44
43
42
41
40
VM3
SS
39
VM4
38
VREF4
37
H1+ H1H2+ H2H3+ H3-
1
36
NC
2
35
DO4-
EC
ECR
VM4
Hall Amp
3
23.5dB
5K
34
DO4+
4
Absolute Values
VM1 CS1
20K VM3
33
DO3DO3+
5
Current Sense Amp Output Current Limit
5K 20K
23.5dB
32
6
31
PGND2
FG1X Generator
Detection FIN(GND) Logic
VM2
FIN(GND)
FG DIR
7
Reverse Rotation
10K 20K VM2
17.5dB
30
DO2-
8
29
DO2+
SVCC1 VM1
9
17.5dB
28
DO1DO1+
Distributor
10
10K 20K
27
CS1
11
26
OPOUT
PGND1
12
Driver
TSD_M
25
OPIN-
13
14
15
16
17
18
19
20
21
22
23
24
TSD_M
5
FIN(GND)
OPIN+
IN4
SGND
IN3
IN2
IN1
A1
NC
VM2
A3
A2
FAN8729
Equivalent Circuits
FG Signal Output Phase Compensation Capacitor
7
25
0.5K
2K
48
Current Detector
Start/Stop
100K
11
5K
44
25 50K 30K
BTL Drive Mute
BTL Bias Voltage
42 43
25 50K 30K
37 41
25 50
6
FAN8729
Equivalent Circuits (Continued)
3-Phase Rotational Direction Output BTL Drive Output
8
25
20K
27 28 29 30 32 33 34 35
30K
3-Phase Output
TSD_M
15K
13 14 15
18
BTL Input(CH1,2)
BTL Input(CH3,4)
21 22
25 5K
19 20
25 10K
OP-AMP Input
SVCC
OP-AMP Output
SVCC
2K 24 1K
2K 25 1K
26
2K
2K
7
FAN8729
Absolute Maximum Ratings (Ta=25C)
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 SVCC1max SVCC2max VM1max VM2,3,4max Pd Topr Tstg IOMAXS IOMAXB Value 7 15 15 15 2.7note -35 ~ +85 -55 ~ +150 1.3 1 Unit V V V V W
C C
A A
Note: 1. When mounted on the PCB (phenolic resin material) of which size is 114mm x 76mm x1.6mm. 2. Power dissipation is reduced with the rate of -21.6mW/C for TA25C. 3. Do not exceed Pd and SOA.
Pd[mW]
3,000 2,000 1,000 0 0 25 50 75 100 125 150 175
Ambient Temperature, Ta[ C]
SOA
Recommended Operating Conditions (Ta=25C)
Parameter Operating Supply Voltage (Spindle Signal) Operating Supply Voltage (BTL Signal) Operating Supply Voltage (Spindle Motor) Operating Supply Voltage (BTL Motor) Symbol SVCC1 SVCC2 VM1 VM2,3,4 Min. 4.5 4.5 4.5 4.5 Type. Max. 5.5 13.2 13.2 SVCC2 Unit V V V V
8
FAN8729
Electrical Characteristics
(Unless otherwise specified, Ta=25C, SVCC1=5V, VM1=8V, BTL driver part: SVcc2=9V, VM2=5V, RL1=8, VM3=8V, VM4=9V, RL2=15) Parameter Circuit Current 2 START/STOP SS On Voltage Range SS Off Voltage Range HALL AMP Hall Bias Current Common Mode Voltage Range Minimum In Level TORQUE CONTROL EC Input Voltage Range Offset Voltage (-) Offset Voltage (+) Input Current In/Output Gain FG FG Output Voltage (L) Input Voltage Range OUTPUT BLOCK Saturation Voltage (Upper TR) Saturation Voltage (Lower TR) Torque Limit Current DIRECTION DETECTOR DIR Output Voltage (L) VDIRL IDIR=10uA 0.5 V VOH VOL ITL IO= -300mA IO=300mA RCS=0.5 560 0.9 0.2 700 1.6 0.6 840 V V mA VFHL VFGR IFG=10uA Hn+, Hn- Input D-range 1.5 0.5 4.0 V V EC ECOFFECOFF+ ECIN GEC ECR=1.65V ECR=1.65V EC=ECR=1.65V ECR=1.65V, RCS=0.5 0.5 -100 20 -5 0.56 -50 50 -1 0.71 3.3 -20 100 0.84 V mV mV uA A/V IHA VHAR VINH 1.5 60 1 5 4.0 uA V mVpp VSSON VSSOFF L-H Circuit On H-L Circuit Off 2.5 1.0 V V Symbol ICC2 Condition Start/Stop =5V Min. Typ. 4.5 Max. Unit mA
9
FAN8729
Electrical Characteristics (continued)
(Unless otherwise specified, Ta=25C, SVCC1=5V, VM1=8V, BTL driver part: SVcc2=9V, VM2=5V, RL1=8, VM3=8V, VM4=9V, RL2=15) Parameter BTL DRIVE PART Quiescent Circuit Current CH MUTE123 Off Voltage CH MUTE123 On Voltage CH MUTE4 Off Voltage CH MUTE4 On Voltage Output Offset Voltage Maximum Output Voltage1,2 Close Loop Voltage Gain Ripple Rejection Slew Rate Ratio*note 1,2*note ICC3 VMOFF123 VMON123 VMOFF4 VMON4 VOF1,2 VOM1,2 GVC1,2 RR1,2 SR1,2 VOF3 VOM3 GVC3 RR3 SR3 VOF4 VOM4 GVC4 RR4 SR4 VOF IB1 VOHOP VOLOP ISINK ISOURCE GVOOP RROP SROP CMRROP Gain*note Pin42 = Variation Pin42 = Variation Pin43 = Variation Pin43 = Variation VIN = 1.65V VIN = 1.65V f=1kHz, VIN= -0.1Vrms f=120Hz, VIN= -20dB f=120Hz, 2Vp-p VIN = 1.65V VIN = 1.65V f= 1kHz, VIN= -0.1Vrms f= 120Hz, VIN= -20dB f= 120Hz, 2Vp-p VIN = 1.65V VIN = 1.65V f= 1kHz, VIN= -0.1Vrms f= 120Hz, VIN= -20dB f= 120Hz, 2Vp-p f= 1kHz, VIN= -75dB f= 120Hz, VIN= -20dB f= 120Hz, 2Vp-p f= 1kHz, VIN= -20dB 2.5 2.5 -50 3.6 15.5 -100 6.5 21.5 -100 7.0 21.5 -20 8 16.5 4.0 17.5 60 1.0 7.0 23.5 60 1.0 7.5 23.5 60 1.0 5.5 4.5 75 65 1 80 1.0 1.0 +50 19.5 +100 25.5 +100 25.5 +20 300 0.1 mA V V V V mV V dB dB V/us mV V dB dB V/us mV V dB dB V/us mV nA V V mA mA dB dB V/us dB Symbol Condition Min. Typ. Max. Unit
CH1,2 Actuator Driver (SVCC2=9V VM2=5V,RL1=8)
CH3 BTL Driver (SVCC2=9V, VM3=8V, RL2=15) Output Offset Voltage3 Maximum Output Voltage3 Close Loop Voltage Gain Ripple Rejection Slew Rate 3*note Output Offset Voltage4 Maximum Output Voltage4 Close Loop Voltage Gain Ripple Rejection Ratio4*note Slew Rate 4*note OP- AMP Input Offset Voltage Input Bias Current High Level Output Voltage Low Level Output Voltage Output Sink Current Output Source Current Open Loop Voltage Slew Rate*
note
Ratio3*note
CH4 BTL Driver (SVCC2=9V, VM4=9V, RL2=15)
Ripple Rejection Ratio*note Common Mode Rejection Ratio*note
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 Above 1.5V Below 1V or Open MUTE status OFF ON
42 43
2. TSD Function
* TSD circuit intercepts all IC output to protect the IC against high temperatures. * When chip temperature rises above 165C, BTL and spindle output is
disable.
SVCC IREF R1 Q0 R2 Hysteresis Ihys R3 Output driver Bias
* When chip temperature falls below 140C, BTL and spindle output
operates normally.
* TSD has hysteresis of 25C.
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. TSD TSD On TSD Off Pin18 High Low * * * *
VCC SVCC
R(external)
TSD
18
20k Q6 Q5
11
FAN8729
4. CH1,2,3,4 Balanced Transformerless (BTL) Drive
R3
Pref
R2 Vin 19 20 21 22 37 41 Vref123,4 R1
R3 DO+ 34 32 29 27
LEVEL SHIFT
M
35 33
Pref
R3 R3
DO- 30 28
* 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 x (1 + ) x (Vin - Vref ) R1 R3 R2 R3 Do- = Pr ef - x (1 + ) x (Vin - Vref ) R1 R3 Do+ = Pr ef +
* BTL gain value is found as follows;
Gain = 4 x
R2 R1
12
FAN8729
5. Spindle
VM1
Rcs VM1 VRCS Io VAMP ECR
+
+
-
TSD Torque sense amp Current sense amp
Gain Controller
Driver
M
EC
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
3mV
-50 0 +50
Forward rotation Stop after detecting reverse rotation
ECR-EC[mV]
EC > ECR
13
FAN8729
6. Calculation of Gain & Torque Current
VM1 Io VM1 Current / Voltage Convertor Output Vs Current sense +
Rcs
CS1(Pin11) R1 + Driver + Negative Feedback loop U Io
Vin
ER ECR
Gm + Absolute Values
Power Transistors
V W
+ + Vmax VM1 Max. output current limiting
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 EC < ECR EC > ECR Forward Reverse DIR Low High
H3+ H3+ -
H2+ H2-
+ -
8
DIR R D Q
CK
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-
+ -
R D Q
H3+ H3-
+ -
CK
D-F/F
Gain controller
Driver
M
Reverse rotation prevention circuit has a function for intercepting the reverse rotation of MD. When SERVO control input is ECECR, 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. Reverse Rotation Preventer ECECR Brake and Stop Stop
* * * *
Rotation Forward Reverse
H2 H L
H3 HL HL
D-F/F H L
DIR L H
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;
7
FG Output H1+ H1+ -
H1
FG
17
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
SVCC1 vs ICC2 6.00 5.50 ICC2(mA)
ICC3(mA) 15.0 14.0 13.0 12.0 11.0 10.0
SVCC2 vs ICC3
5.00 4.50 4.00 3.50 3.00 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
5.5
6.5
7.5
8.5 9.5 SVCC2(V)
10.5 11.5 12.5 13.5
V IN1 vs V OUT1 (V REF=1.65V , V M2=5V ) 6.0 4.0 VOUT1(V) 0.0 -2.0 -4.0 -6.0 0.0 1.0 2.0 V IN1(V ) 3.0 VOUT2 2.0
V IN2 vs V OUT2 (V REF=1.65V , V M2=5V ) 6.0 4.0 2.0 0.0 -2.0 -4.0 -6.0 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 ) 12.0 8.0 VOUT3(V) 4.0 0.0 -4.0 -8.0 -12.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 V IN3(V ) VOUT4(V)
V IN4 vs V OUT4 (V REF=1.65V , V M4=12V ) 12.0 8.0 4.0 0.0 -4.0 -8.0 -12.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 V IN4(V )
19
FAN8729
Typical Performance Characteristics
SVCC2 vs GVC1 19.5 19.0 18.5 GCV1(dB)
GVC2(dB) 19.5 19.0 18.5 18.0 17.5 17.0 16.5 16.0 15.5 4.5
SVCC2 vs GVC2
18.0 17.5 17.0 16.5 16.0 15.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5
5.5
6.5
7.5
8.5
9.5
10.5 11.5 12.5 13.5
SVCC(V)
SVCC2(V)
SVCC2 vs GVC3 25.5 25.0 24.5 25.5 25.0 24.5
SVCC2 vs GVC4
GVC3(dB)
24.0 23.5 23.0 22.5 22.0 21.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5
GVC4(dB)
24.0 23.5 23.0 22.5 22.0 21.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5
SVCC2(V)
SVCC2(V)
INS+ vs ITL (V REF=1.65V ) 800 ITL(mA) 600 400 200 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 INS+(V )
20
FAN8729
Test Circuits
Hall Signal Generation
V
OPOUT
OPIN+
OPIN-
A
A
A
48 PC1
47 INS+
46 INS-
45 OUTS
44 SS
43 MUTE4
42 MUTE123
41 VREF123
40 SVCC2
39 VM3
38 VREF4 VM4
37 NC 36
2
A A A A A A
1 2 3 4 5 6
H1+ H1H2+ H2H3+ H3-
DO4-
35
V
1 2
RL1
RL2
DO4+ 34 DO333
V
31
1
RL1
RL2
DO3+ 32 PGND2
V
7
10uA
FAN8729
FG DIR SVCC1 DO2- 30 DO2+ 29 DO1- 28 DO1+ 27 TSD_M OPOUT 26 OPIN25 OPIN+ 24
2 2
V
1
RL1
RL2
8
V
SVCC1
A
9
V
1
RL1
RL2
10 VM1 11 CS1
VM1
IN4
A2
A1
A3
12
13
14
15
16
17
18
IN3
19
20
21
22
c
a
c
a
c
a
b
b
b
RL 300mA 300mA
RL
RL
OPIN+ V
OPINV
1M
OPOUT VCC
50
1M
V
10uF
V
21
OPOUT
OPIN+
OPIN-
V V V
V
A
VM2
IN2
IN1
NC
V
PGND1
SGND
23
FAN8729
Typical Application Circuits
Servo Torque Control
System Control
CH123 Mute
0.1uF 48 PC1 1 HALL1 2 47 INS+ 46 INS45 OUTS 44 SS 43 MUTE4 42 MUTE123 41 VREF123 40 SVCC2 39 VM3 38 VREF4 VM4 37 36
H1+ H1-
VREF4 NC DO435
CH4 Mute
M
3 HALL2 4 H2DO3DO3+ 33 H2+ D04+ 34
Loadng
M
5 HALL3 6 H3PGND2 31 H3+ 32
Sled Motor
FG Signal Rotate Direction 7 FG
FAN8729
DO230 Focus 8 DIR DO2+ 29 9 SVCC1 DO128 Tracking 10 VM1 11 CS1 TSD_M SGND PGND1 A1 13 VM2 OPOUT OPIN+ OPIN25 24 IN3 IN2 26 VM1 DO1+ 27
IN4
14
NC
A2
A3
12
15
16
17
18
19
20
21
IN1 22
23
Servo Amp
Notes: Radiation pin is connected to the internal GND of the package.
Tracking
Loading
VREF
Sled
Focus
22
FAN8729
Package Dimensions
48-QFPH-1414
17.20 0.30 14.00 0.20
17.20 0.30
14.00 0.20
#48
#1
+0.10 0.30 -0.05 0.10MAX
(0.825)
0.65 3.00MAX 2.60 0.10
+0.10 0.20 -0.05
0.00~0.25
(4.85)
0~8
0.10MAX
0.80 0.20
23
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.
www.fairchildsemi.com 11/4/03 0.0m 001 Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation
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.

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