FAN8024CD [FAIRCHILD]
4-Channel Motor Driver; 4通道马达驱动器
| 型号： | FAN8024CD |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | 4-Channel Motor Driver |
| 文件： | 总12页 (文件大小：173K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
FAN8024CD
Features
Description
• 2-Channel BTL driver with current feedback
• 2-Channel BTL DC motor driver
• Built-in thermal shutdown circuit
• Built-in mute circuit
The FAN8024CD is a monolithic IC, suitable for 2-ch BTL
DC motor drivers and 2-ch motor drivers with current
feedback which drive the focus and tracking actuators of a
CD- media system.
• Operating supply voltage: 4.5~13.2V
28-SSOPH-375
Typical Applications
Ordering Information
• Compact disk ROM (CD-ROM)
• Compact disk RW (CD-RW)
• Digital video disk ROM (DVD-ROM)
• Digital video disk RAM (DVD-RAM)
• Digital video disk player (DVDP)
• Other compact disk media
Device
Package
Operating Temp.
-25 °C ~ 85 °C
-25 °C ~ 85 °C
FAN8024CD 28-SSOPH-375
FAN8024CDTF 28-SSOPH-375
Rev. 1.0.0
©2003 Fairchild Semiconductor Corporation
FAN8024CD
Pin Assignments
(GND)
FIN
27
26
25
24
23
22
21
20
19
18
17
16
15
28
FAN8024CD
1
2
3
7
6
4
5
8
9
12
10
11
13
14
FIN
(GND)
2
FAN8024CD
Pin Definitions
Pin Number
Pin Name
I/O
I
Pin Function Description
1
IN1
CH1 input
2
CAP1.1
CAP1.2
IN2.1
-
Connection with capacitor
for CH1
3
-
4
I
OP-AMP CH2 input(+)
OP-AMP CH2 input(-)
OP-AMP CH2 output
Feedback for CH1
Signal Vcc
5
IN2.2
I
6
OUT2
FB1
O
I
7
8
VCC
-
9
PVCC1
PGND1
-
Power Supply 1
Power Ground 1
Drive2 Output (-)
Drive2 Output (+)
Drive1 Output (-)
Drive1 Output (+)
Drive4 Output (+)
Drive4 Output (-)
Drive3 Output (+)
Drive3 Output (-)
Power Ground 2
Feedback for CH4
Power Supply 2
Vcc ground
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
-
DO2
DO2+
DO1
−
O
O
O
O
O
O
O
O
-
−
DO1+
DO4+
DO4
DO3+
DO3
−
−
PGND2
FB4
-
PVCC2
VCCGND
IN3
-
-
I
CH3 input
CAP4.2
CAP4.1
IN4
-
Connection with capacitor
for CH4
-
I
CH4 input
REF
I
Bias voltage input
Stand-by input
STBY
I
3
FAN8024CD
Internal Block Diagram
GND
28
27
+
26
25
24
23
22
21
20
19
18
17
16
15
PVCC
2
-
7.5K
15K
1
0K
X2
Actuator
Driver
Loading
Driver
-
+
TS
D
PV
CC1
PV
CC2
-
V
CC
+
7.5K
Sled
Driver
Actuator
Driver
X2
10K
-
25K
+
-
+
PVCC1
9
VCC
8
1
2
3
4
5
12
6
7
10
11
13
14
GND
4
FAN8024CD
Equivalent Circuits
ERROR AMP INPUT
STAND-BY INPUT
70ΚΩ
2KΩ
2KΩ
30ΚΩ
4
5
28
40ΚΩ
1KΩ
2KΩ
1KΩ
2KΩ
30ΚΩ
ERROR AMP OUTPUT
SIGNAL REFERENCE INPUT
2ΚΩ
27
6
50ΚΩ
POWER AMP OUTPUT
11
12
13
14
15
16
17
18
5
FAN8024CD
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Symbol
VCCmax
PD
Value
Unit
V
Maximum supply voltage
Power dissipation
15
note
1.7
W
Operating temperature range
Storage temperature range
TOPR
-25 ~ +85
°C
°C
TSTG
-55 ~ +150
NOTE:
1. When mounted on a 50mm × 50mm × 1mm PCB (Phenolic resin material).
2. Power dissipation derating rate : -13.6mW/°C(Ta≥25°C)
3. Should not exeed Pd(Power dissipation) and SOA(Safe operating area).
Power Dissipation Curve
Pd [mW]
3,000
2,000
1,000
SOA
0
0
25
50
75 85 100
125
150
175
Ambient Temperature, Ta [°C]
Recommended Operating Conditions (Ta = 25°C)
Parameter
Supply Voltage
Supply Voltage
Symbol
VCC
Min.
4.5
-
Typ.
Max.
13.2
-
Unit
-
V
V
PVCC1,PVCC2
VCC
6
FAN8024CD
Electrical Characteristics
(Unless otherwise specified, Ta = 25 °C, V
= 12V, PV 1,2 = 5V)
CC
CC
Parameter
Symbol
Conditions
Min.
Typ. Max. Unit
Quiescent Current1
I
I
Stand-by off
-
-
18
-
27
0.5
0.5
-
mA
mA
V
CC1
CC2
Quiescent Current1
Stand-by on
Stand-by On Voltage
V
V
-
-
-
-
STon
SToff
Stand-by Off Voltage
2.0
-
V
ACTUATOR DRIVE CIRCUIT
Output Offset Current
I
-
-
-6
0
+6
-
mA
V
OO1,4
Maximum Output Voltage1
Transconductance
V
3.6
1.5
4.0
1.7
OM1,4
G
V
= 100mVp-p, f=1kHz
1.9
A/V
M1,4
IN
PRE OP AMP (SLED DRIVER)
Common mode Input Range*
Input Bias Current
V
-
-
-
-
-
-
0
-300
-
-
11.0
V
nA
V
OOM
I
-30
0.1
10.9
4
-
B
Low Level Output Voltage
High Level Output Voltage
Output Source Current
Output Sink Current
V
0.3
OL
V
10
1
-
-
-
V
OH
I
mA
mA
SOURCE
I
5
10
SINK
SLED DRIVE CIRCUIT
Output Offset voltage2
Maximum Output Voltage2
Closed loop Voltage Gain1
Loading DRIVE CIRCUIT
Output Offset Voltage1
Maximum Output Voltage 3
Closed loop Voltage Gain 2
V
-
-100
10.0
18.0
0
+100
-
mV
V
OF2
OM2
VLO2
V
-
10.9
20.0
G
V
V
= 100mVp-p, f=1kHz
22.0
dB
IN
IN
V
-
-50
3.6
0
50
-
mV
V
OF3
OM3
VLO3
V
-
4.0
G
= 100mVp-p, f=1KHz
13.5
15.5
17.5
dB
* : Guaranteed design value
7
FAN8024CD
Application Information
1. Reference Input & Stand-by Function
• Reference input (PIN 27)
The applied voltage at the reference input pin must be ranged between 0.8V and 6.5V, when V =8.5V.
CC
• Stand-by input (PIN 28)
The following input conditions must be satisfied for the stand-by function.
Stand-by input voltage
below 0.5V or open
above 2.0V
OPERATION
The stand-by function is activated so the bias block and
power block are disabled
Recover the normal operation
2. Protection Function
Thermal shutdown (TSD)
If the chip temperature rises above 175°C, the thermal shutdown (TSD) circuit is activated and the output circuit enters the
mute state, that is off state. The TSD circuit has a temperature hysteresis of 25°C
3. Separation Of Power Supply
• PVCC1 (PIN 9)
PVCC1 is the power supply for the loading driver. The range is between 5V ~ 12V.
• PVCC2 (PIN 21)
PVCC2 is the power supply for the actuator drivers that include focus and tracking actuators. The range is between 5V ~ 12V
• VCC (PIN 8)
V
CC pin supplies power for the sled driver and the signal logic part. VCC≥PVCC1(PVCC2).
8
FAN8024CD
4. Current feedback channels(channel 1 & 4)
power amp
current feedback amp
20k
actuator
10k
Command
7.5k
7.5k
Sensing resistor
ref
X2
Rext Cext
• The reference voltage(ref) is given externally through pin 27.
• The input OP-amp output signal is amplified by (20K/10K) times and then fed to the current feedback amplifier.
• The current feedback amplifier compares the output current sensed input and command input then makes the controlled
output to eliminate delay effect of the load. Please refer to the application note for more information about current feedback
theory(http://www.fairchildsemi.com/an/AN/AN-4109.pdf).
• The DC gain of current feedback amplifier and power amplifier is unity, that is 1 [A/V]. Users can change the gain by
adding external resistor at the command input.
5. Channel 2 schematic
power amp
25k
10k
M
ref
• The reference voltage(ref) is given externally through pin 27.
• The input OP-amp can be used for several purposes, for example low pass filter, differential input coordinator, gain scaler
and so on.
9
FAN8024CD
6. Channel 3 schematic
power amp
15k
10k
Command
M
ref
• The reference voltage(ref) is given externally through pin 27.
• The input OP-amp output signal is amplified by (15K/10K) times and then fed to the power amplifier. The gain of power
amplifier is 4 so the total max gain of channel 3 is 6.
• Users must check input command range to use max output voltage because the total gain is relatively smaller than other
channels.
10
FAN8024CD
Typical Application Circuits
Stand by
REF
IN1
STBY
REF
1
2
28
27
SERVO
FOCUS
AMP
CAP1.1
CAP1.2
IN2.1
TRACKING
3
4
5
6
7
26
25
24
IN4
SLED
REF
CAP4.1
CAP4.2
IN2.2
TRAY CONTROL IN
OUT2
IN3 23
22
FB1
VCCGND
FAN8024CD
8
9
VCC
PVCC2 21
5V or 12V
12V
PVCC1
PGND
FB4
20
19
5V or 12V
10
PGND
11 DO2−
12 DO2+
13 DO1−
DO3− 18
TRAY
MOTOR
SLED
MOTOR
DO3+
17
DO4− 16
FOCUS
TRACKING
ACTUATOR
R
D
R
D
ACTUATOR
14
DO1+
DO4+
15
11
FAN8024CD
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
8/11/03 0.0m 001
Stock#DSxxxxxxxx
2003 Fairchild Semiconductor Corporation
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