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www.fairchildsemi.com
FAN8727
Spindle + 4CH Motor Drive IC
Features

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Description
#123,3 % - - -.
(&
$"4$43#06#6!1 7 / 48-QFPH-1414
Typical Applications
$
7
7 &
7 &7
Ordering Information
Device Package Operating Temperature -35!C ~ +85!C FAN8727 48-QFPH-1414
Rev. 1.0.1
(c)2000 Fairchild Semiconductor Corporation
FAN8727
Pin Assignments
BTLSNGD
MUTE12
MUTE3 38
48
47
46
45
44
43
42
41
40
39
37
VH
MUTE4
AVM4
BIAS
H3 +
H2 +
H1 +
H3 "
H2 "
H1 "
1
36
DO4 + DO4 " AVM3
FG ECR
2
35 34
3
EC
4
33
DO3 + DO3 " BTLPGND2
VCC2 PC1
5
32
6
31
FAN8727
SIGGND 7 30 BTLPGND1
VM CS1
8 9
29 28
DO2 + DO2 "
SS
10 11
27
DO1 + DO1 " DI1
DIR SB
26 25
12
13 PWRGND
14 A3
15 A2
16 A1
17 OPIN+
18 OPIN"
19 OPOUT
20 VCC1
21 AVM12
22 DI4
23 DI3
24 DI2
2
FAN8727
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 VH FG ECR EC VCC2 PC1 SIGGND VM CS1 S/S DIR SB PWRGND A3 A2 A1 OPIN+ OPINOPOUT VCC1 AVM12 DI4 DI3 DI2 DI1 DO1DO1+ DO2DO2+ BTLPGND1 BTLPGND2 DO3DO3+ I/O I O I I - - - - I I O I - O O O I I O - - I I I I O O O O - - O O HALL BIAS FG SIGNAL OUTPUT TORQUE CONTROL REFERENCE TORQUE CONTROL SIGNAL SUPPLY VOLTAGE PHASE COMPENSATION CAPACITOR SIGNAL GROUND MOTOR SUPPLY VOLTAGE CURRENT SENSOR START/STOP 3-PHASE ROTATIONAL DIRECTION OUTPUT SHORT BRAKE POWER GROUND 3-PHASE OUTPUT 3 3-PHASE OUTPUT 2 3-PHASE OUTPUT 1 OP AMP INPUT (+) OP AMP INPUT (-) OP AMP OUTPUT SUPPLY VOLTAGE BTL CH-1, 2 MOTOR SUPPLY VOLTAGE BTL DRIVE INPUT 4 BTL DRIVE INPUT 3 BTL DRIVE INPUT 2 BTL DRIVE INPUT 1 BTL DRIVE 1 OUTPUT (-) BTL DRIVE 1 OUTPUT (+) BTL DRIVE 2 OUTPUT (-) BTL DRIVE 2 OUTPUT (+) BTL POWER GROUND 1 BTL POWER GROUND 2 BTL DRIVE 3 OUTPUT (-) BTL DRIVE 3 OUTPUT (+) Pin Function Descrition
3
FAN8727
Pin Definitions (Continued)
Pin Number 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Pin Name AVM3 DO4DO4+ MUTE4 MUTE3 MUTE12 AVM4 BIAS BTLSGND H1H1+ H2H2+ H3H3+ I/O - O O I I I - - - I I I I I I Pin Function Descrition BTL CH3 MOTOR SUPPLY VOLTAGE BTL DRIVE 4 OUTPUT (-) BTL DRIVE 4 OUTPUT (+) BTL DRIVE MUTE CH 4 BTL DRIVE MUTE CH 3 BTL DRIVE MUTE CH 1, 2 BTL CH 4 MOTOR SUPPLY VOLTAGE BTL BIAS VOLTAGE BTL DRIVE SIGNAL GROUND HALL1(-) INPUT HALL1(+) INPUT HALL2(-) INPUT HALL2(+) INPUT HALL3(-) INPUT HALL3(+) INPUT
4
FAN8727
Internal Block Diagram

38
48
47
46
45
44
43
42
41
40
39

1
37

MUTE12
Hall Bias FG Generator TSD
36

MUTE3
2
MUTE4
35
Hall Amp
AVM4
3
34
4
33
Detection
5 32
Logic
6
AVM3 31
Absolute Values
VM CS1
Current Sense Amp
Reverse Rotation
AVM12
Output Current Limit

7
30

8 AVM12 9
29
Short Brake
Distributor
28
10
27
11
26
12
25
13
14
15
16
17
18
19
20
21
22
23
24

5
FAN8727
Equivalent Circuits
HALL BIAS FG SIGNAL OUTPUT

TORQUE CONTROL REFERENCE & SIGNAL
PHASE COMPENSATION CAPACITOR

CURRENT DETECTOR
START/STOP

6
FAN8727
Equivalent Circuits (Continued)
3-PHASE ROTATIONAL DIRECTION OUTPUT SHORT BRAKE

3-PHASE OUTPUT
OP AMP INPUT

OP AMP OUPUT
BTL DRIVE INPUT

7
FAN8727
Equivalent Circuits (Continued)
BTL DRIVE OUTPUT BTL DRIVE MUTE

BTL BIAS VOLTAGE
HALL INPUT

8
FAN8727
Absolute Maximum Ratings ( Ta=25!C) !
Parameter Supply Voltage (BTL SIGNAL) Supply Voltage (SPINDLE SIGNAL) Supply Voltage (MOTOR) Supply Voltage (BTL MOTOR) Power Dissipation Operating Temperature Range Storge Temperature Range Maximum Output Current (SPINDLE part) Maximum Output Current (BTL part) Symbol VCC1max VCC2max VMmax VMBTLmax Pd Topr Tstg IOMAXS IOMAXB Value 15 7 15 15 3.0note -35 ~ +85 -55 ~ +150 1.3 1 Unit V V V V W !C !C A A
NOTE: 1. When mounted on 70mm # 70 mm # 1.6mm PCB (Phenolic resin material) $$ 2. Power dissipation is reduced 24 mW/!C for using above Ta=25!C 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]
Recommended Operating Conditions ( Ta=25!C) !
Parameter Operating Supply Voltage (BTL SIGNAL) Operating Supply Voltage (SPINDLE SIGNAL) Operating Supply Voltage ( SPINDLE MOTOR) Operating Supply Voltage (BTL MOTOR) Symbol VCC1 VCC2 VM VMBTL Min. 4.5 4.5 4.5 4.5 Typ. Max. 13.2 5.5 13.2 VCC1 Unit V V V V
9
FAN8727
Electrical Characteristics (Ta=25!C, VCC2=5V, VM=12V)
Parameter Circuit Current 1 Circuit Current 2 START/STOP On Voltage Range Off Voltage Range HALL BIAS Hall Bias Voltage HALL AMP Hall Bias Current In-phase in Voltage Range Minimum in Level TORQUE CONTROL In Voltage Range Offset Voltage (-) Offset Voltage (+) In Current In/output Gain FG FG Output Voltage (H) 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 (H) Dir Output Voltage (L) SHORT BRAKE On Voltage Range Off Voltage Range VSBON VSBOFF 2.5 0 VCC 0.5 V V VDIRH VDIRL IFG=-10uA IFG=10uA 3.0 VCC 0.5 V 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 VFGH VFHL VFGR IFG= -10uA IFG=10uA Hn+, Hn- input D-range 3.0 1.5 VCC 0.5 4.0 V V V EC ECOFFECOFF+ ECIN GEC ECR=2.5V ECR=2.5V EC=ECR=2.5V ECR=2.5V, RCS=0.5% 0.5 -100 20 -5 0.41 -50 50 -1 0.51 3.3 -20 100 0.61 V mV mV uA A/V IHA VHAR VINH 1.5 60 1 5 4.0 uA V mVpp VHB IHB=20mA 1.2 1.8 V VPSON VPSOFF L-H Circuit On H-L Circuit Off 2.5 0.5 V V Symbol ICC 1 ICC2 Condition Power Save=0V Power Save=5V Min. Typ. 0.3 4.5 Max. 1 6 Unit mA mA
10
FAN8727
Electrical Characteristics (continued)
BTL Drive Part (Ta=25!C, VCC1=12V, VMBTL=12V, RL=24%) Parameter Quiescent Circuit Current Output Offset Voltage Maximum Output Amplitude Voltage Voltage Gain Ripple Rejection Ratio Slew Rate CH Mute Off Voltage CH Mute On Voltage NORMAL 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 Gain Ripple Rejection Ratio Slew Rate Common Mode Rejection Ratio VOF IB1 VOH1 VOL1 ISINK ISOU1 GVO1 RR1 SR1 CMRR1 f=1kHz, VIN=-75dB f=120Hz, VIN=-20dB f=120Hz, 2Vp-p f=1kHz, VIN=-20dB -20 11 10 5 25 8 75 65 1 80 +20 600 0.1 mV nA V V mA mA dB dB V/us dB Symbol ICC VOO VOM GVC RR SR VMOFFCH VMONCH Condition VIN=0.1Vrms, 1kHz VIN=0.1Vrms, 120kHz 120Hz, 2Vpp pin37, 38, 39 = Variation pin37, 38, 39 = Variation Min. -40 9.5 10.5 2.5 Typ. 18 10.5 12.0 60 1.0 Max. 25 40 13.5 1.0 Unit mA mV V dB dB V/us V V
11
FAN8727
Calculation of Gain & Torque Limit Current
VM IO VM " VS Output RS Current sense + CS1 (Pin 9)
Current / Voltage Convertor " Vin EC ECR & Gm Absolute Values + + + + Vmax " VM R1 "
Negative Feedback loop U V W IO
Driver
Power Transistors
Commutation Distributor H1 H2
H3
Max. output current limiting
8/,99 $ 5+: 6&/
0.255 Gain RS
0: .980/
Vmax 350 ' mV ( Itl ' mA ( RS RS
12
FAN8727
Application Information
1. Mute Function
+ $ &0 & ; -
/ MUTE ON Voltage MUTE OFFVoltage 2.5[V] above OPEN or 0.5[V] below Mute function operation Normal operation
,
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2. 4-CH Balanced Transformerless (Btl) Driver
VCC
Q1 DRIVE AMP X2 Q3 27 29 33 36 M 26 28 32 35
Q2
DRIVE AMP X2
Q4
GND
41 Vbias Vin Rextern 22 23 24 25 10k + AMP1 " LEVEL SHIFT
-0- 7 :
%+/
-0-
,,-,.-,%,9
+8A45 : /

0 7 0/
B)6)6 /

5

0/
( - 7
5C+ 5C%/! -5C,5C.
- / ;
0-
,,-,.-,%,9 0- /
13
FAN8727
;
0-
,,-,.-,%,9 0- / 67 - 7 : D 5 :
3. Torque & Output Current Control
E &F!
& &
VM
VM RNF
+ Torque sense amp VAMP ECR + " + " Current sense amp
"
VRNF IO Driver M
Gain Controller TSD
EC
7
7 ** 6&- E #$"

0 #$"/ #$"

6 7
0-
6 7 5
0
/ 6 - 6& 7 7
6 / ; ?

+@9!&-
/ E
/
VRNF [V] Reverse Forward
Rotation Ec < ECR Forward rotation Stop after detecting reverse rotation
Ecoff"
Ecoff+
Ec > ECR
3 mV 0 ECR-EC[V]
* E #$"8/90G./.0
14
FAN8727
4. Power Save Function
Bias block VCC 100k Start Stop 30K% 10 50K% Q1

/
7
5C+/ ; 4
+80- 5C+ /! - 4
+8!
(1- 5C+ /

7
+8
H Pin#10 HIGH OPEN/LOW FAN8727 START STOP
5. Short Brake Function
VM
Drive logic VCC
OFF
MOTOR
14 ON OFF 20K% 12 4K% Q1 ON 15 16
;

$- 7
7 7
/' -

7- 7
6&/ 7- #123,3/; -
" " - 7 /
7
+,-
/ Pin#12 HIGH LOW SHORT BRAKE ON OFF
15
FAN8727
6. Thermal Shutdown (Tsd) Function
; ?

+@9!&-
- ?
+%8!&-
7
/6
7 ,9!&/
7. Rotational Direction Detecting Function
VCC
H2+ H2"
+ " D R 11 Q DIR
Rotation EC < ECR Forward Reverse
DIR Low High
CK H3+ H3" + " D-F/F
EC > ECR
$ 7 - / $ 7
4 /( '+-','.
7/6 -'+*',*$'.- -
/
H1
H2
H3
( a)
6 7- -'.*$',*$'+- -
:
/
16
FAN8727
H1
H2
H3
( b)
6 - ', '.( IJ- ' IJ/
/
8. Reverse Rotation Preventing Function
EC ECR
+ " Current Sense Amp
H2+ H2"
+ " D CK D-F/F Gain Controller Driver M Q
H3+ H3"
+ "
- -7 / & E 7 - 4
C (
#
-
/ ; $ -*J* 4
$/# *J* -$-
- /
$ - E /6
/ Rotation Forward Reverse H2 H L H3 H *$L H *$L D-F/F H L Reverse Rotation Preventer ECECR Brake and Stop Stop
17
FAN8727
9. Fg Output Function
- $- 7K
/
/
+ H1 "
+ H2 " FG OUTPUT + H3 "
10. Hall Sensor Connection
*: '
/
VCC
VCC
HALL 1 HALL 1 HALL 2 HALL 3
HALL 2
HALL 3
1
VH
1
VH
18
FAN8727
11. Hall Input Output Timming Chart
.

: -
/#
-

-
/

-
-
/
H1 +
H2 +
H3 +
A1 output current
A1 output voltage
A2 output current
A2 output voltage
A3 output current
A3 output voltage
12. Power Supply Sequence VM must be supplied faster than VCC2,
19
FAN8727
Test Circuits 1
BTL Drive Part
10+F 12V
VMUTE
VMUTE 39 MUTE2 38 MUTE3
2.5V 48 H3+ 47 H3" 46 H2+ 45 H2" 44 H1+ 43 H1" 42 BTLSGND 41 BIAS 40 MUTE1
VMUTE 37 MUTE4 V RL4' DO4+ 36 SW4 DO4" 35 AVM3 34 DO3+ 33 SW3 RL3' RL3 V V BTLPGND1 30 SW2 DO2+ 29 DO2" 28 DO1+ 27 DO1" 26 SW1 RL1 V RL2 DO3" 32 BTLPGND2 31 12V 10+F RL4 DI1 25 D13 23 24 SERVO AMP D12
1 VH 2 FG 3 ECR 4 EC 5 VCC2 6 PC1
FAN8727
7 SIGGND 8 VM 9 CS1 10 SS 11 DIR PWRGND AVM12 21 OPIN+ OPIN" VCC1 12 SB OPOUT
13
14
15
16
17
18
19
20
22
12V BTL SVCC
A 10+F 10+F 12V CONTROL TRAY
D14
A3
A2
A1
TRACKING FOCUS SLED
OPIN (+) V
OPIN (") V 1 SW6 10+F 3 VIN3 2 VIN3 + " Vs1 1M%
OPOUT VCC
SW5 1 V 1M% 3 2
1.2k%
1 SW7 2 3
V
VIN1
Vp1
20
FAN8727
Test Circuits 2
Spindle Motor Drive Part
H3+ H3" H2+ H2" H1+ H1"
A V V 48 H3+ SW12 1 2 2.5V SW13 3 EC SW14 5 5V A 6 VCC2 PC1 4 VH FG ECR EC
A
A
A
A
A
47 H3"
46 H2+
45 H2"
44 H1+
43 H1"
42 BTLSGND
41 BIAS
40 MUTE1
39 MUTE2
38 MUTE3
37 MUTE4 DO4+ 36 DO4" 35 AVM3 34 DO3+ 33 DO3" 32 DO2+ 29 DO2" 28 DO1+ 27 DO1" 26 DI1 25 24 D12
BTLPGND2 31
FAN8727
SW15 12V 7 8 V 9 SW16 10 SS V SW17 11 DIR PWRGND OPOUT OPIN+ OPIN" VCC1 12 SB AVM12 SIGGND VM CS1 BTLPGND1 30
D14 22
IFR
SW18
13
14
15
16
17
18
19
20
21
23
VSB
SW19 SW20
D13
A3
A2
A1
21
FAN8727
Application Circuits
FOCUS TRACKING MUTE
HALL3
HALL2
HALL1
BTL BIAS VOLTAGE
+5V
48 H3+
47 H3"
46 H2+
45 H2"
44 H1+
43 H1"
42 BTLSGND
41 BIAS
40 MUTE1
39 MUTE2
38 MUTE3
37 MUTE4
1 FG SIGNAL SERVO TORQUE CONTROL VCC 2 3 4 5 6 0.1+F
VH FG ECR EC VCC2 PC1
TRAY MUTE DO4+ 36 DO4" 35 AVM3 34 +5V DO3+ 33 DO3" 32 SLED MOTOR TRAY MOTOR DO2+ 29 DO2" 28 DO1+ 27 DO1" 26
FAN8727
7 12V 8 9 SYSTEM CONTROL ROTATE DIRECTION SHORT BREAK SIGGND VM CS1 BTLPGND1 30 FOCUS ACTUATOR
10 SS 11 DIR PWRGND AVM12 OPIN+ OPIN" VCC1 12 SB OPOUT
SLED MUTE
BTLPGND2 31
TRACKING ACTUATOR
DI1 25 D14 D13 23 D12 24 SERVO AMP
A3
A2 15
13
14
16
A1
17
18
19
20
21
22
VCC
+5V
TRACKING FOCUS SLED CONTROL TRAY
S/S
22
FAN8727
23
FAN8727
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 CORPOTATION. 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 5/7/01 0.0m 001 Stock#DSxxxxxxxx , 2001 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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