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FAN8486D (KA3086D)
2-Phase BLDC Motor Driver
Features
* * * * * * Drives the BLDC motor using 2 hall sensors. 2-phase, full-wave drive method Built-in thermal shutdown (TSD) circuit Controls the motor speed through voltage Built-in bandgap circuit Built-in frequency Generator (FG) & Phase Generator (PG) amplifier & comparator.
Descripiton
The FAN8486D is a monolithic integrated circuit, and it is suitable for drum motor driver of VCR system.
28-SSOP-300SG
Typical Applications
* Video cassette recorder (VCR) cylinder (drum) motor * Other 2-phase BLDC motor
Ordering Information
Device FAN8486D Package 28-SSOP-300SG Operating Temp. -25C ~ +75C -25C ~ +75C
FAN8486DTF 28-SSOP-300SG
Rev. 1.0.1 February. 2000.
(c)2000 Fairchild Semiconductor International
2
1 2 3 4 54 6 7 27 28
FAN8486D (KA3086D)
PVCC2
SGND
Pin Assignments
NC
VCTL
26
NC
FGOUT
25
NC
FGAMPOUT
24
OUT2P
FGIN
23
PGND2
FG(V25)
22
OUT2N
VREG
21
FAN8486D
OUT1P
PG(V25)
8
9
20
Rev. 1.0.1 February. 2000.
PGND1
10
PGIN
19
OUT1N
PGAMPOUT
18
11
NC
PGOUT
12
14 17
PVCC1
H2N
13
16
SVCC
H2P
14
15
H1P
H1N
FAN8486D (KA3086D)
Pin Definitions
Pine 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 Pin Name PVCC2 NC NC NC OUT2P PGND2 OUT2N OUT1P PGND1 OUT1N NC PVCC1 SVCC H1P H1N H2P H2N PGOUT PGAMPOUT PGIN PG(V25) VREG FG(V25) FGIN FGAMPOUT FGOUT VCTL SGND I/O O O O O O I I I I O O I I O O I Output drive 2(P) Power ground 2 Output drive 2(N) Output drive 1(P) Power ground 1 Output drive 1(N) Power supply voltage1 Signal supply voltage Hall signal input 1P Hall signal input 1N Hall signal input 2P Hall signal input 2N Phase generate output Phase generate amp. output Phase generate input Reference voltage for PG Regulated voltage Reference voltage for FG Frequency generate input Frequency generate amp. output Frequency generate output Voltage control(motor speed control) Signal ground Pin Function Description Power supply voltage2
Rev. 1.0.1 February. 2000.
3
13
16
SVCC
+-
4
1
ICTL
FAN8486D (KA3086D)
28
PVCC2
SGND
2 3 4
-+ AMP
27
NC
Current/Voltage VCTL Control
VCTL
26
NC
HYS. COM
FGOUT
Internal Block Diagram
FGAMPOUT
25
NC
24
54
DRIVER
OUT2P
FGIN
23
PGND2
6 7 8 9
DRIVER
VREF Supply each block
FG(V25)
22
OUT2N
TSD
VREG (5.0V)
VREG
21
OUT1P
VREF
PG(V25)
+AMP
20
Rev. 1.0.1 February. 2000.
PGND1
10
PGIN
19
OUT1N
PGAMPOUT
18
11
NC
HYS. COM
PGOUT
14 17
PVCC1
GM
GM
12
+-
H2N
AMP
H2P
AMP
14
15
H1P
H1N
FAN8486D (KA3086D)
Equivalent Circuits
Description VCTL Pin No. 27
VREG
Internal circuit
ICTL 50 27 1k
Motor output
5,7,8,10
VCC
5 8
7 10
Hall input
14,15,16,17
VREG Vcc
50 14 16
500
500
50 15 17
ICTL
Rev. 1.0.1 February. 2000.
5
FAN8486D (KA3086D)
Equivalent Circuits (Continued)
Description PG, FG amplifier Pin No. 19,20 24,25
VREG
Internal circuit
VCC
VCC
50 20 24
1k V25
50 19 25
PG, FG hysteresis amplifier
18,19,25,26
VCC VREG VREG VCC 50 18 50 19 V25 25 26
6
Rev. 1.0.1 February. 2000.
FAN8486D (KA3086D)
Absolute Maximum Ratings (Ta=25C)
Parameter Supply voltage Maxium output current VREG output current Power dissipation Operating temperature Storage temperature Symbol VCCmax IOmax IREGmax Pd TOPR TSTG Value 18 1.0
note1
Unit V A mA W C C
Remark No heat sink -
30 1 note2 -25 ~ +75 -45 ~ +125
Notes: 1. Duty 1 / 100, pulse width 500s 2. 1) When mounted on glass epoxy PCB (76.2 x 114 x 1.57mm) 2) Power dissipation reduces 8.0mW / C for using above Ta=25C. (Without heat-sink) 3) Do not exceed Pd and SOA(Safe Operating Area).
Power Dissipation Curve
Pd (mW) 2, 000
SOA 0 0 25 50 75 100 125 150 175
Ambient temperature, Ta [C]
Recommened Operating Conditions (Ta=25C)
Parameter Operating supply voltage Symbol VCC Min. 8 Typ. 12 Max 16 Unit V
Rev. 1.0.1 February. 2000.
7
FAN8486D (KA3086D)
Electrical Characteristics
(Ta=25C, VCC=12V, unless otherwise specified) Parameter FULL CIRCUIT Quiescent current VOLTAGE REGULATOR Regulated voltage Regulated voltage HALL INPUT Hall minimum input level note Hall bias current OUTPUT DIRVE Output saturation voltage (Upper) Output saturation voltage (Lower) Output current A Output current B VOLTAGE CONTROL VCTL reference voltage note VCTL injput range VCTL offset range VCTL input bias current
note
Symbol IQ VREG VREG VINH IBH VSU VSL IOUTA IOUTB
Condition VCC=12V VCC=12V VCC=12V, IREG=-20mA VCTL=2.0V, Hall=2.5V VCTL=4.5V VCTL=4.5V VH1P=2.6V VHALL_1N=2.4V, VCTL=3.5V VH2P=2.6V VH2N=2.4V, VCTL=2.5V 0.48 x VREG VCTL=0 ~ VCTL VCTL=2.5V VCTL=2.8V, 3.3V IO / VCTL VH1P=2.6V, VH1N=2.4V
Min. 4.6 4.6 50 500 500
Typ. 8.5 5.0 5.0 0.25 1.3 2.0 700 700
Max. 13 5.4 5.4 2.0 2.0 2.0 900 900
Unit mA V V mVp-p A V V mA mA
V25 VCTL VOFF IVCTL
2.0 0 -150 -
2.3 0 1.0
2.5 VREG +150 6.0
V V mV A
Voltage control gain
GM
IO
0.38
0.55
0.64
A/V
0.55A/V(TYP) 0.48 x VREG (TYP) VCTL
NOTE: The note in the chart means items calculated and approved in design not the items proven by actual test result.
8
Rev. 1.0.1 February. 2000.
FAN8486D (KA3086D)
Electrical Characteristics (Continued)
(Ta=25C, VCC=12V, unless otherwise specified) Parameter FULL CIRCUIT Shutdown temperature note Temperature hysteresis FG / PG AMP Input offset voltage Input current Open loop gain
note note
Symbol TSD THYS VOFS IAMP_IN GA VOHA VOLA VHYS VOLHYS VBHYS
Condition VIN=2.5V VCC=12V, Signal=500Hz VIN=2.0V VIN=2.7 VIN=2.0V -
Min. 130 65 VREG -1.48 130 7.0
Typ. 160 30 0 0.2 70 VREG -0.74 0.85 165 0.12 10
Max. 8 2.0 1.45 200 0.32 13
Unit C C mV A dB V V mV V k
Output high voltage Output low voltage COMPARATOR (HYSTERESIS) Hysteresis level Output low voltage Output pull-up resistance
NOTE: The note in the chart means items calculated and approved in design not the items proven by actual test result.
Rev. 1.0.1 February. 2000.
9
FAN8486D (KA3086D)
Application Informations
1. A Diagram Summarizing The Entire System
IO HALL+ Hall_IN HALL- If IC 4IC GM VCTL V/I Converter VREG TSD R2 IC AMP. 4IC 2IC DRIVER
R1
FG_IN
AMP & COMP
FG_OUT
PG_IN
AMP & COMP
PG_OUT
Figure 1.
Figure 1 is a conceptual diagram of the FAN8486D. It turns on or off depending on the signal of the hall sensor used for sensing the rotor position of motor. The AMP, GM (Feedback) and output blocks are circuits used to determine current gain of FAN8486D. Furthermore, HallIN represents the hall signal switch. It supplies stable bias to each VREG block. The TSD block is a thermal shutdown circuit that protects the IC during an high temperature inside the IC. Moreover, FG. and PG. blocks output individual signals generated in the motor using the amplifier and comparator. These signals transmit motor speed and position data to controller of external servo etc. for their control.
2. Current Control
Figure 2 simplifies figure 1. The supplied IO current drives the motor and the Ic current controls the motor speed. Figure 3 is a graph of ICTL vs. IO.
10
Rev. 1.0.1 February. 2000.
FAN8486D (KA3086D)
ICTL AT
IO
Figure 2.
IO IOmax AT
ICOmax
ICTL
Figure 3.
3. Voltage Control
Even though FAN8486D command uses Ic to control the magnitude of IO, it can also use voltage. FAN8486D mainly uses voltage control and has option to use current control.
VCTL
ICTL V/I Converter AT
IO
Figure 4.
Figure 4 shows the principle of the voltage control. The VCTL is the motor speed control voltage, and the ICTL is converted to current through the V / I converter. Figure 5 shows the graph of VCTL vs. IO.
IO IOmax AT GM
0.48 x VREG (TYP)
VCTL
Figure 5.
Rev. 1.0.1 February. 2000.
11
FAN8486D (KA3086D)
Typical Performance Characteristics
5.0 4.0 VREG(V) 3.0 2.0 1.0 0.0 0 2 4 6 8 10 12 V CC(V) 14 16 18 20 VCTL = 0V
5 4 VREG(V) 3 2 1 0 -30-20-10 0 VCTL = 0V VCC = 12V 10 20 30 40 50 60 70 80 90 Temperature() Temperature(C)
1.VCC vs VREG
2.Temp. vs VREG
12 10 GM1(A/V) ICC(mA) 8 6 4 2 0 8 10 12 14 VCC(V) 16 18
0.63 0.58 0.53 0.48 0.43 0.38 8 10 12 V CC (V) 14 16 18 V CTL = 3.5V
VCTL = 3.5V VCTL = 3.5V RLRL = 10 K = 10K
3.VCC vs ICC
4.VCC vs GM1
900 850 800 IO (mA) 750 700 650 600 550 500 8 10 12 VCC(V) 14 16 18 IO (mA)
900 850 800 750 700 650 600 550 500 8 10 12 V CC (V) 14 16 18
VCTL = = 3.5V VCTL 3.5V RL == 10K RL 10K
VVCTL = 3.5V CTL = 3.5V RL 10K RL == 10K
5.VCC vs IOA
6.VCC vs IOB
12
Rev. 1.0.1 February. 2000.
FAN8486D (KA3086D)
Test Circuits
VCC ICC
1 PVCC2 SGND 28
1
SW24
A FGOUT
2mA
2 3
2
NC
VCTL
27
VCTL
3
NC
FGOUT
26
2
SW22 SW23
500A -500A
2 1
4
NC
FGAMPOUT
25
1 FGAMPOUT 3
1 2 10(20W)
SW1
5
OUT2P
6
PGND2
F A N 8 4 8 6 D
FGIN
SW19
2 1
2
24
2 1
SW20
FGIN
SW21
FG(V25)
FG(V25)
23
1
~
VREG
1 2 1 2
2
SW2
7
OUT2N
VREG
SW18
22
1
IREG=-20A
SW3
8
OUT1P
PG(V25)
SW25
2 1
21
PG(V25)
~
1 2 PGIN 1 SW14 2 PGAMPOUT
10(20W)
9
PGND1
PGIN
20
SW13
3
1 2
SW4
10
OUT1N
PGAMPOUT
19
SW15
1
SW16 1
2 2
-500A -500A
1 SW17
A PGOUT
2mA
11
NC
PGOUT
18
2 3
1
SW10
12
PVCC1
H2N
17
2 1
SW9
H2N
H1P
SW7
H2P
13
SVCC
H2P
16
2
SW12
+ - ~
SW8
1 SW5
14 H1P H1N 15
- +
~
2 2 SW6 H1N 1
SW11
Rev. 1.0.1 February. 2000.
13
FAN8486D (KA3086D)
Typical Application Circuits
1
PVCC2
SGND
28
2
NC
VCTL
27
3
NC
FGOUT
26
4
NC
FGAMPOUT
25
5
OUT2P
6
PGND2
7
OUT2N
F A N 8 4 8 6 D
FGIN
24
FG(V25)
23
VREG
22
M
8 OUT1P PG(V25) 21
PG
9 PGND1 PGIN 20
10
OUT1N
PGAMPOUT
19
VREG
11 NC PGOUT 18
12
PVCC1
H2N
17
HALL
13
SVCC
H2P
16
14
H1P
H1N
15
HALL
14
Rev. 1.0.1 February. 2000.
FAN8486D (KA3086D)
Rev. 1.0.1 February. 2000.
15
FAN8486D (KA3086D)
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 INTERNATIONAL. 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 12/1/00 0.0m 001 Stock#DSxxxxxxxx 2000 Fairchild Semiconductor International
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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