FAN8024ED [FAIRCHILD]
4-Channel Motor Driver; 4通道马达驱动器
| 型号： | FAN8024ED |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | 4-Channel Motor Driver |
| 文件： | 总12页 (文件大小：189K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
September 2005
FAN8024ED
4-Channel Motor Driver
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 FAN8024ED 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.
28-SSOPH-375
• Operating supply voltage: 4.5~13.2V
Typical Applications
• 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
Ordering Information
Operating
Temp.
Device
Package
FAN8024ED
28-SSOPH-375
28-SSOPH-375
-25 °C ~ 85 °C
-25 °C ~ 85 °C
FAN8024EDTF
TF: Tape & Reel type
©2005 Fairchild Semiconductor Corporation
FAN8024ED Rev. 1.0.0
1
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Block Diagrams
GND
28
27
+
26
25
24
23
22
21
20
19
18
17
16
15
PVCC2
-
7.5K
15K
10K
X2
Loading
Driver
Actuator
Driver
-
+
TSD
PVCC1
PVCC2
VCC
-
+
7.5K
X2
Sled
Driver
Actuator
Driver
-
10K
25K
+
-
+
PVCC1
9
VCC
8
1
2
3
4
5
7
12
6
10
11
13
14
GND
2
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FAN8024ED Rev. 1.0.0
Pin Assignments
1
2
3
IN1
28
27
STBY
REF
CAP1.1
CAP1.2
IN2.1
26
25
IN4
CAP4.1
4
5
6
7
24 CAP4.2
23 IN3
IN2.2
OUT2
FB1
22
VCCGND
FIN(GND)
FAN8024ED
FIN(GND)
21
20
19
18
17
16
VCC
8
9
PVCC2
FB4
PVCC1
PGND1
PGND2
10
11
DO2
−
DO3
DO3+
DO4
−
12
DO2+
13
14
−
DO1
−
15 DO4+
DO1+
3
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FAN8024ED Rev. 1.0.0
Pin Definitions
Pine
Number
Pin Name
IN1
I/O
I
Pin Function Description
1
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
O
I
7
FB1
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
4
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FAN8024ED Rev. 1.0.0
Equivalent Circuits
ERROR AMP INPUT
STAND-BY INPUT
70ΚΩ
30ΚΩ
2KΩ
2KΩ
4
5
28
40ΚΩ
1KΩ
2KΩ
1KΩ
2KΩ
30ΚΩ
Figure 4. Stand-By Input
Figure 1. Error Amp Input
ERROR AMP OUTPUT
SIGNAL REFERENCE INPUT
2ΚΩ
27
6
50ΚΩ
Figure 2. Error Amp Output
Figure 5. Signal Reference Input
POWER AMP OUTPUT
11
12
13
14
15
16
17
18
Figure 3. Power Amp Output
5
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FAN8024ED Rev. 1.0.0
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Symbol
Value
15
1.7note
Unit
V
Maximum supply voltage
Power dissipation
V
CCmax
P
D
W
Operating temperature range
Storage temperature range
T
-25 ~ +85
-55 ~ +150
°C
OPR
T
°C
STG
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. Must not exceed 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
Symbol
VCC
Min.
4.5
-
Typ.
Max.
13.2
-
Unit
Supply Voltage
-
V
V
Supply Voltage
PVCC1,PVCC2
VCC
6
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FAN8024ED Rev. 1.0.0
Electrical Characteristics
(Unless otherwise specified, Ta = 25 °C, V
= 12V, PVCC1,2 = 5V)
CC
Parameter
Quiescent Current1
Symbol
Conditions
Min.
Typ. Max. Unit
I
Stand-by off
Stand-by on
-
-
-
18
-
27
0.5
0.5
mA
mA
V
CC1
Quiescent Current2
I
CC2
Stand-by On Voltage
VSTon
VSToff
-
-
-
Stand-by Off Voltage
2.0
-
-
V
ACTUATOR DRIVE CIRCUIT
Output Offset Current
IOO1,4
VOM1,4
GM1,4
-6
0
+6
-
mA
V
-
-
Maximum Output Voltage1
3.6
1.5
4.0
1.7
Transconductance
V
= 100mVp-p, f=1kHz
1.9
A/V
IN
PRE OP AMP (SLED DRIVER)
Common mode Input Range*
VOOM
IB
0
-300
-
-
11.0
V
nA
V
-
-
-
-
-
-
Input Bias Current
-30
0.1
10.9
4
-
Low Level Output Voltage
High Level Output Voltage
Output Source Current
Output Sink Current
VOL
0.3
VOH
10
1
-
-
-
V
ISOURCE
ISINK
mA
mA
5
10
SLED DRIVE CIRCUIT
Output Offset voltage2
VOF2
VOM2
GVLO2
-100
10.0
18.0
0
+100
-
mV
V
-
Maximum Output Voltage2
Closed loop Voltage Gain2
Loading DRIVE CIRCUIT
Output Offset Voltage3
10.9
20.0
-
V
V
= 100mVp-p, f=1kHz
22.0
dB
IN
IN
VOF3
VOM3
GVLO3
-50
3.6
0
50
-
mV
V
-
Maximum Output Voltage 3
Closed loop Voltage Gain 3
*: Guaranteed design value
4.0
15.5
-
= 100mVp-p, f=1kHz
13.5
17.5
dB
7
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FAN8024ED Rev. 1.0.0
Application Information
1. Reference Input & and Stand-by Function
•
•
Reference input (PIN 27)
The applied voltage at the reference input pin must be between 0.8V and 6.5V, when VCC=8.5V.
Stand-by input (PIN 28)
The following input conditions must be satisfied for the stand-by function.
Stand-by input voltage
OPERATION
The stand-by function is activated so the bias block and
power block are disabled
Below 0.5V or open
Above 2.0V
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, which 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)
VCC pin supplies power for the sled driver and the signal logic part. VCC≥PVCC1(PVCC2).
4. Current feedback channels (channel 1 & and 4)
currentfeedback amp
poweramp
20k
actuator
10k
Command
7.5k
7.5k
Sensing resistor
ref
X2
Rext Cext
•
•
•
The reference voltage(ref) is supplied 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 and then makes the controlled out-
put to eliminate delay effect of the load. Please refer to the Application Note 4109 for additional 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, which is 1 [A/V]. Users can change the gain by adding
external resistor at the command input.
8
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FAN8024ED Rev. 1.0.0
5. Channel 2 Schematic
poweramp
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.
6. Channel 3 Schematic
poweramp
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; therefore, 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.
9
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FAN8024ED Rev. 1.0.0
Typical Application Circuits
Stand by
REF
1
2
IN1
STBY 28
SERVO
FOCUS
AMP
27
26
25
24
CAP1.1
CAP1.2
IN2.1
REF
IN4
TRACKING
3
4
5
6
7
SLED
REF
CAP4.1
CAP4.2
IN2.2
TRAY CONTROL IN
OUT2
IN3 23
22
FB1
VCCGND
FAN8024ED
8
9
VCC
PVCC2 21
FB4 20
12V
5V or 12V
PVCC1
PGND
5V or 12V
10
19
PGND
11 DO2−
12 DO2+
13 DO1−
DO3− 18
TRAY
MOTOR
SLED
MOTOR
DO3+
17
DO4− 16
FOCUS
TRACKING
ACTUATOR
RD
RD
ACTUATOR
14
DO1+
DO4+ 15
10
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FAN8024ED Rev. 1.0.0
Package Dimensions
11
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FAN8024ED Rev. 1.0.0
12
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FAN8024ED Rev. 1.0.0
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