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FAN8082D Bi-directional DC Motor Driver
Features
* Built-in brake function for stable brake characteristics. * Built-in element to absorb a surge current derived from changing motor direction and braking motor drive. * Motor speed control by an external voltage. * Stable motor direction change. * Interfaces with CMOS devices. * Built-in the thermal shut down circuit (165C). * Low standby current. (6.5mA)
Description
The FAN8082D is a monolithic integrated circuit designed for driving bi-directional DC motor with braking and speed control, and it is suitable for the loading motor driver of VCR, CDP, and TOY systems. The speed control can be achieved by adjusting the external voltage of the speed control pin. It has two pins of logic inputs for controlling the forward/ reverse and braking.
8-SOP-225
Typical Applications
* Compact disk player (CDP) tray or changer * Low current DC motor such as audio or video equipment. * General DC motor
Ordering Information
Device FAN8082D FAN8082DTF Package 8-SOP-225 8-SOP-225 Operating Temp. -25C ~ +75C -25C ~ +75C
Rev. 1.0.0
(c)2001 Fairchild Semiconductor Corporation
BI-DIRECTIONAL DC MOTOR DRIVER
Pin Assignments
GND VO1
1
8
VO2
2
7
PVCC
FAN8082D
VCTL
3 6
SVCC
VIN1
4
5
VIN2
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 Pin Name GND VO1 VCTL VIN1 VIN2 SVCC PVCC VO2 I/O O I I I O Ground Output 1 Motor speed control Input 1 Input 2 Supply voltage (Signal) Supply voltage (Power) Output 2 Pin Function Description
Internal Block Diagram
GND VO1
1
DRIVER OUT
8
VO2
2
7
PVCC
PRE DRIVER VCTL
3
TSD
BIAS
6
SVCC
VIN1
4
LOGIC SWITCH
5
VIN2
2
BI-DIRECTIONAL DC MOTOR DRIVER
Equivalent Circuit
Description Pin No. Internal circuit
Vcc
Vcc
Output
2, 8
2 8
Vcc
Vcc
Speed control
3
3
VCC
Vcc
Vcc
VCC
Input
4, 5
4 5
VCC
SVCC PVCC
6 7
6 7
3
BI-DIRECTIONAL DC MOTOR DRIVER
Absolute Maximum Ratings (Ta = 25C)
Parameter Supply voltage Maxium Output current Power dissipation Operating temperature Storage temperature Symbol VCCmax IOmax Pd TOPR TSTG Value 13 0.8
note1
Unit V A mW C C
Remark -
330note2 -25 ~ +75 -55 ~ +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 2.64mW / C for using above Ta=25C. 3) Do not exceed Pd and SOA(Safe Operating Area).
Power Dissipation Curve
Pd (mW)
330 SOA
0
0
25
50
75
100
150 125 15 Ambient temperature, Ta [C]
Recommened Operating Conditions (Ta = 25C)
Parameter Operating supply voltage (Signal)note
note
Symbol SVCC PVCC
Operating voltage range 7 ~ 12 4~8
Unit V V
Operating supply voltage (Power)
NOTE: Caution 1) PVCC SVCC Caution 2) VCTL must be opened or 4.0 VCTL PVCC
4
BI-DIRECTIONAL DC MOTOR DRIVER
Electrical Characteristics (SVCC=PVCC=12V,Ta = 25C)
Parameter Quiescent current Min. input-on current 1 Min. input-on current 2 Input threshold voltage 1 Input threshold voltage 2 Output leakage current 1 Output leakage current 2 Zener current 1 Zener current 2 Output voltage 1 Output voltage 2 Saturation voltage 1 (Upper) Saturation voltage 2 (Upper) Saturation voltage 1 (Lower) Saturation voltage 2 (Lower) Symbol ICC IIN1 IIN2 VITH1 VITH2 IOL1 IOL2 IZ1 IZ2 VO1 VO2 V SAT1 VSAT2 VSAT3 VSAT4 Conditions Pin4 & 5: GND, RL= RL=, Pin4=IIN1, Pin5=L RL=, Pin4=L, Pin5=IIN RL=, Pin4=VIN, Pin5=L RL=, Pin4=L, Pin5=VIN RL=, Pin4 & 6=GND RL=, Pin4 & 6=GND RL=, Pin4=H, Pin5=L RL=, Pin4=L, Pin5=H RL=60, Pin4=H, Pin5=L RL=60, Pin4=L, Pin5=H IO=300mA IO=500mA IO=300mA IO=500mA Min. 4 1.0 1.0 6.6 6.6 Typ. 6.5 10 10 1.3 1.3 0.01 0.01 0.85 0.85 7.2 7.2 1.9 1.9 0.25 0.4 Max. 9.5 30 30 1.6 1.6 1 1 1.5 1.5 7.4 7.4 2.3 2.3 0.5 0.65 Unit mA A A V V mA mA mA mA V V V V V V
5
BI-DIRECTIONAL DC MOTOR DRIVER
Application Information
1. Thermal Shut Down Circuit
I
Q1 V1 R1 Q2 V2 R2 Q3
When Ta = 25C, Q2 & Q3 are Turned-off and output stage operates normally. V1 = I x (R1 + R2) V2 = R2 / (R1 + R2) x V1 = 0.37V When Ta = 165C, Q2 & Q3 Turn-on and it turns-off the output stage. 0.70V - 0.37V = 330mV (When Q2 & Q3 are Turn-on, VbeQ2 = VbeQ3 = 0.70V) And temperature coefficient of Q2 = Q3 = -2mV / C T.S.D: 330mV / 2mV = 165C
2. Logic Input & Output Table
Input Pin #4 Low High Low High Pin #5 Low Low High High Pin #2 *Low High Low *Low Output Pin #8 *Low Low High *Low Motor Standby Forward Reverse Brake
INPUT High is above 2.0V. INPUT Low is below 0.7V. *Low : All Power TRs are off-state. But internal Bias makes output Voltage low state.
6
BI-DIRECTIONAL DC MOTOR DRIVER
3. Logic Switch Circuit
SVCC V2 5 Q7 Q6 Q5 VCTL 7.4V ZD 3
V1
4
Q4
*ZD
: External Component
This circuit define reference voltage of output. When pin #4 is "H" and pin #5 is "L", - V1 = Vzd + VbeQ4 + VbeQ5 *=* 8.9V - V2 = Vbeq 7 + VsatQ6 *=* 0.87V V1 and V2 are related with the output voltage of the motor and change according to the voltage of pin #3 (VCTL).
4. Drive Output Circuit
PVCC V1 Q1 Q4 V2
Q2 R1 VO1 RL
M
Q5 R2 VO2
Q3
Q6
V1 = 8.9V V2 = 0.87V VO1 = V1 - VBEQ1 - VBEQ2 VO2 = VQ6SAT VO = VO1 - VO2 = V1 - VBEQ1 - VBEQ2 - VQ6SAT IRL = (VO1 - VO2) / RL
7
BI-DIRECTIONAL DC MOTOR DRIVER
Typical Perfomance Chracteristics
CHARACTERISTIC GRAPHS 1. VCC vs ICC
10 9 8 7 6 5 4 3 2 1 0 0 2 4 6 8 10 12 VCC(V)
2. Temperature vs ICC
10 9 8 7 6 5 4 3 2 1 0 -35
ICC(mA)
ICC(mA)
VIN = 0V 14 16 18 20
VCC = 12V VIN = 0V -15 5 25 45 Temp.( C) 65 85
Figure 1. VCC vs ICC
Figure 2. Temperature vs ICC
3. VCTL vs. Vo
12 10 8 VO(V) 6 4 2 0 0 6 VCTL(V) Figure 3. VCTL vs VO 2 4 8 10 12 VCC = 12V VIN = 5V/0V RL = 60
4. Temperature vs. Vo
7.7 7.6 7.5 7.4 7.3 7.2 7.1 7.0 6.9 6.8 6.7 6.6 6.5 -35
VO(V)
VCC = 12V VCTL = 7.4V VIN = 5V/0V RL = 60 -15 5 25 45 Temp.( C) 65 85
Figure 4. Temperature vs VO
5. IO vs. VSAT(UPPER) VSAT SAT(UPPER)
3.0 2.5 VSAT(V)
5. IO vs. VSAT(LOWER) VSAT(LOWER) SAT
1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0.2 0.4 0.6
1.5 1.0 0.5 0.0 0.2 0.8 1.0 IO(A) Figure 5. IO vs VSAT(UPPER) 0.4 0.6 1.2 VCC = 12V VCTL = ope VIN = 5V/0V
VSAT(V)
2.0
VCC = 12V VCTL = open VIN = 5V/0V 0.8 1.0 1.2
IO(A) Figure 6. IO vs VSAT(LOWER)
8
BI-DIRECTIONAL DC MOTOR DRIVER
Test Circuits
1
GND
VO2
8
2
VO1
PVCC
7
FAN8082D
3
VCTL
SVCC
6
4
VIN1
VIN2
5
A S1 S2 A S5 ZD 7.4V
S3
S4
A
A VCC VIN
9
BI-DIRECTIONAL DC MOTOR DRIVER
Application Circuits
1
GND
VO2
8
2
VO1
RS
PVCC
7
VCC
FAN8082D
3
VCTL
SVCC
6
4
VIN1
VIN2
104
5
ZD
104
M
*Must
use RS.
10
BI-DIRECTIONAL DC MOTOR DRIVER
11
BI-DIRECTIONAL DC MOTOR DRIVER
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 10/25/01 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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