KA3018D2TF [FAIRCHILD]
CD Motor Driver, PDSO28, 0.300 INCH, HEAT SINK, SSOP-28;
| 型号： | KA3018D2TF |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | CD Motor Driver, PDSO28, 0.300 INCH, HEAT SINK, SSOP-28 驱动 CD 光电二极管 接口集成电路 |
| 文件： | 总17页 (文件大小：337K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
KA3018D2
3-Channel Motor Driver
Features
Description
• 3-Channel BTL (Balanced transformer-less) driver
• Built-in variable regulator with reset (Series-REG)
• Built-in thermal shutdown circuit
• Built-in mute circuit
The KA3018D2 is a monolithic IC, suitable for a 3-ch motor
driver which drives focus actuator, tracking actuator, and
sled motor of a CD-media system.
• Built-in normal OP-amp
• Operating supply voltage: 4.5 ~ 5.5V
• Corresponds to 3.3V or 5V DSP
28-SSOPH-300
Typical Applications
Ordering Information
• Notebook compact disk ROM (CD-ROM)
• Other portable compact disk media
Device
Package
Operating Temp.
−35°C ~ +85°C
−35°C ~ +85°C
KA3018D2 28-SSOPH-300
KA3018D2TF 28-SSOPH-300
Rev. 1.0.1
February. 2000.
©2000 Fairchild Semiconductor International
1
KA3018D2
Pin Assignments
FIN(GND)
KA3018D2
FIN(GND)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
2
KA3018D2
Pin Definitions
Pin Number
Pin Name
I/O
I
Pin Function Description
1
REF
IN1.1
IN1.2
OUT1
IN2.1
IN2.2
OUT2
SGND
VM12
MUTE
DO2+
Bias voltage input
2
I
Op-amp CH1 input (+)
Op-amp CH1 input (−)
Op-amp CH1 output
Op-amp CH2 input (+)
Op-amp CH2 input (−)
Op-amp CH2 output
Signal ground
3
I
4
O
I
5
6
I
7
O
-
8
9
-
BTL CH1, 2 supply VTG
Mute
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
I
O
O
O
O
-
Drive2 output (+)
Drive2 output (−)
Drive1 output (+)
Drive1 output (−)
Power ground
DO2
DO1+
DO1
−
−
PGND
DO3−
O
O
I
Drive3 output (−)
Drive3 output (+)
Regulator reset
DO3+
RESX
VREGX
VM3
O
-
Regulator output
BTL CH3 supply VTG
Regulator
REGOX
I
OPIN(−)
I
Op-amp input (−)
Op-amp input (+)
Op-amp output
OPIN(+)
OPOUT
OUT3
IN3.2
I
O
O
I
Op-amp CH3 output
Op-amp CH3 input (−)
Op-amp CH3 input (+)
Supply voltage
IN3.1
I
VCC
-
3
KA3018D2
Internal Block Diagram
28
27
26
25
24
23
22
21
20
19
18
17
16
15
+
+
−
−
+
−
-−
−
+
+
+
−
+
REGULATOR
VM3
TSD
20k
+
−
10k
10k
10k
10k
-
−
−
+
+
10k
−
+
LEVEL
SHIFT
LEVEL
SHIFT
VM12
+
VM12
+
−
−
−
−
+
+
MUTE
−
−
−
−
+
+
+
+
50k
50k
1
2
3
4
5
6
7
8
9
10
11
12
13
14
4
KA3018D2
Equivalent Circuits
Error amp input
Mute input
2
5
2
5
50Ω
50kΩ
10
50Ω
50Ω
27
26
50kΩ
Error amp output
Signal reference input
4
7
1
50Ω
0.2kΩ
50Ω
25
Power output
Regulator reset
11
12
13
14
16
17
50Ω
50kΩ
18
30kΩ
5
KA3018D2
Equivalent Circuits (Continued)
Regulator
Regulator output
50Ω
19
21
50Ω
General op amp input
Normal op amp output
24
23
22
50Ω
50Ω
10k
6
KA3018D2
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Symbol
VCCmax
PD
Value
7
1.4note
Unit
V
Maximum supply voltage
Power dissipation
W
Operating temperature range
Storage temperature range
TOPR
−35 ~ +85
−55 ~ +150
°C
°C
TSTG
NOTE:
1. When mounted on a 76.2mm × 114mm × 1.57mm PCB (Phenolic resin material).
2. Power dissipation reduces 11.2mW / °C for using above Ta = 25°C
3. Do not exceed P and SOA (Safe operating area).
D
Power Dissipation Curve
PD (Temporary)
Pd (mW)
2,000
1,200
SOA
400
0
85
0
25
50
75
100
125
150
175
Ambient temperature, Ta [°C]
Recommended Operating Conditions (Ta = 25°C)
Parameter
Supply voltage
Symbol
Min
Typ
Max
Unit
VCC
4.5
-
5.5
V
7
KA3018D2
Electrical Characteristics
(Unless otherwise specified, Ta=25°C, V =VM12=VM3=5V)
CC
Parameter
Quiescent current
Symbol
ICC
Conditions
Min.
Typ. Max. Units
VIN=0V
Mute pin=GND
-
-
8
2.5
-
12
4
mA
mA
V
Mute on current
IMUTE
VMon
VMoff
Mute on voltage
-
-
-
0.5
-
Mute off voltage
2
-
V
BTL DRIVE CIRCUIT
Input offset voltage
VIO
VOO
VOM1
VOM2
GVC1
GVC2
RR
-
−20
−50
2.7
3
-
+20
mV
mV
V
Output offset voltage
Maximum output voltage 1
Maximum output voltage 2
Closed loop voltage gain 1
Closed loop voltage gain 2
Ripple rejection ratio
Slew rate
VIN=2.5V
-
+50
VCC=5V, RL=8Ω (CH1, 2)
VCC=5V, RL=24Ω (CH3)
f=1kHz, VIN=0.1VRMS (CH1, 2)
f=1kHz, VIN=0.1VRMS (CH3)
VIN=0.1VRMS, f=120Hz
3.4
3.8
12
18
60
0.8
-
-
13.5
20
-
V
10.5
16
-
dB
dB
dB
V/µs
SR
VO=2Vp-p, f=120kHz
-
-
GENERAL OP AMP CIRCUIT
Input offset voltage
VOFOP
IBOP
-
-
−10
-
-
+10
mV
nA
V
Input bias current
-
3
300
High level output voltage
Low level output voltage
Output sink current
VOHOP
VOLOP
ISINK
VCC=5V, RL=1kΩ
VCC=5V, RL =1kΩ
VCC=5V, RL= 50Ω
4
-
0.7
10
10
-
1
1.3
V
20
20
75
65
1
-
mA
mA
dB
dB
V/µs
dB
V
Output source current
Open loop voltage gain
Ripple rejection ratio
Slew rate
ISOURCE VCC=5V, RL=50Ω
-
GVO
RROP
SROP
CMRR
VICM
VIN=−75dB, f=1kHz
VIN=−20dB, f =120Hz
f=120kHz, 2Vp-p
VIN=−20dB, f=1kHz
VCC=5V
-
-
-
-
-
Common mode rejection ratio
Common mode input range
-
80
-
-
−0.3
4.5
8
KA3018D2
Electrical Characteristics (Continued)
(Unless otherwise specified, Ta=25°C, V =VM12=VM3=5V)
CC
Parameter
ERROR AMP CIRCUIT
Input offset voltage
Input bias current
Symbol
Conditions
Min.
Typ. Max. Units
VOFOP
IBOP
-
-
−10
-
-
+10
mV
nA
V
-
4.5
-
300
High level output voltage
Low level output voltage
Output sink current
Output source current
Slew rate
VOHOP
VOLOP
VSINK
VCC=5V, RL=10kΩ
4.8
0.2
4
-
VCC=5V, RL =10kΩ
VCC=5V, RL= 1kΩ
0.5
V
2
-
-
-
mA
mA
V/µs
VSOURCE VCC=5V, RL=1kΩ
2
4
SROP
f=120kHz, 2Vp-p
-
1
VARIABLE REGULATOR CIRCUIT
Regulator output voltage
Load regulation
VREG
∆VR1
∆VCC
IL=100mA
3.0
−40
−20
-
-
-
4.5
10
30
V
IL=0→200mA
mV
mV
Line regulation
IL=200mA, VCC=5→8V
9
KA3018D2
Application Information
1. REFERENCE INPUT & ALL MUTE FUNCTION
Pin 1 (REF) is a reference input pin.
• Reference input
The applied voltage at the reference input pin must be between 1.5V and 3.5V, when V =5V.
CC
• Mute input
The following input conditions must be satisfied for the normal mute function.
All mute on voltage
All mute off voltage
Below 0.5V
Above 2V
Mute function operation
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 is in the
mute state, that is off state. The TSD circuit has a temperature hysteresis of 25°C.
10
KA3018D2
3. REGULATOR & RESET FUNCTION
The regulator configuration with the external components is illustrated in figure 1.
• The external circuit is composed of the KSB772 PNP transistor and a capacitor about 33µF, and two feedback resistors R1,
R2. The capacitor operates both as a ripple eliminator and as compensation of the feedback loop.
• The output voltage (REG OUT) is
R1
R2
(where R1 =R2)
Vout = 1 + ------- × 2.5 = 5[V]
• When the voltage of pin 18 (Vreset) is 0V, the regulator reset function is activated, and the output voltage (REG OUT)
becomes 0V. Otherwise, if the voltage of pin 18 is 5V, the regulator operates properly.
V
CC
REG OUT
KSB772
+
Vreset
R1
R2
21
20
19
18
−
+
KA3018D2
2.5V
Figure 1. Regulator circuit
11
KA3018D2
4. FOCUS / TRACKING ACTUATOR SLED MOTOR DRIVE PART
• The reference voltage, REF is given externally through pin 1.
• The error amp output signal is amplified by R2/R1 times and then fed to the level shift circuit.
• The level shift circuit produces the differential output voltages and drives the two output power amplifiers.
Since the differential gain of the output amplifiers is equal to 2 × (1+ R4/R3), the output signal of the error amp is amplified
by (R2 / R1) × 2 × (1 + R4 / R3).
• If the total gain is insufficient, the input error amp can be used to increase the gain.
• The bias voltage is about half of the power supply voltage (VM).
M
Power amp
R4
R4
AP2
AP3
−
+
−
Vrr
R3
R3
+
−
SHIFT
LEVEL
R2
AP1
−
+
1
−
R1
Vref
4
3
7
6
25
26
EA
−
Error amp
Vin
2
5
27
Figure 2. BTL drive circuit
12
KA3018D2
Typical Performance Characteristics
< V
& V
>
OM
CC
< VCC
&
ICC
>
V
OM (V)
I
CC (mA)
14
10
9
8
7
6
5
4
3
2
1
CH1
CH2
CH3
12
10
8
6
4
Ta= 25 ℃
VCC= VM12= VM3
RL1= 8Ω (CH1,2)
RL2= 24Ω (CH3)
Ta=25℃
VCC=VM12=VM3
2
0
3
0
2
6
9
12
15
VCC (V)
5
8
11
14
VCC (V)
< VCC & GVC
>
< I
& V
>
OUT
OM
G
VC (dB)
VOUT (V)
20
4.5
18
16
14
12
10
8
4
3.5
3
CH1 Upp.
CH1 Low
CH2 Upp.
CH2 Low
CH3 Upp.
CH3 Low
2.5
2
1.5
1
6
Ta= 25℃
VCC= VM12= VM3
Ta= 25℃
CH1
CH2
CH3
VCC= VM12= VM3
RL1= 8Ω (CH1,2)
RL2= 24Ω (CH3)
4
0.5
0
2
0
3
0
100
200
300
400
500
600
700
5
7
9
11
13
15
17
19
21
VCC (V)
IOM (mA)
< I & V
O
(LOAD REGULATION) >
< V & V
(LINE REGULATION) >
OUT
OUT
CC
VOUT (V)
VOUT (V)
4
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
3
2
1
Ta= 25℃
VCC= 5V
Ta=25℃
0
4
0
200
400
600
800
1000
IO (mA)
6
8
10
12
14
16
VCC (V)
18
13
KA3018D2
Typical Performance Characteristics (Continued)
< V & I
CC
(ERROR OP-AMP) >
< V & I
CC
(ERROR OP-AMP) >
sink
source
Isink (mA)
16
I
source (mA)
5
CH1
CH2
CH3
14
12
10
8
4
3
2
1
6
CH1
CH2
CH3
4
Ta= 25℃
RL= 1KΩ
Ta= 25℃
RL= 1KΩ
2
0
3
0
3
6
9
12
15
6
9
12
15
VCC (V)
VCC (V)
< V & I
CC
(GENERAL OP-AMP) >
< V & I
(GENERAL OP-AMP) >
source
CC
sink
Isource (mA)
Isink (mA)
30
120
25
20
15
10
5
100
80
60
40
Ta= 25℃
RL= 50Ω
20
Ta= 25℃
RL= 50Ω
0
3
0
3
6
9
12
15
6
9
12
15
VCC (V)
VCC (V)
< TEMP & G
>
TEMP & LINE REGULATION
VC
G
VC (dB)
Δ VCC (mV)
20
20
18
16
14
12
10
8
16
12
8
6
CH1
CH2
CH3
VCC= VM12= VM3= 4.5V
RL1= 8Ω (CH1,2)
RL2= 24Ω (CH3)
4
4
VCC= 6V→9V
IL= 200mA
2
0
0
- 40
- 20
0
20
40
60
80
100
- 40
- 20
0
20
40
60
80
100
TEMP (℃)
TEMP (℃)
14
KA3018D2
Typical Application Circuits 1
(Differential PWM control mode)
BIAS
VOLTAGE
VCC
1
2
28
27
REF
VCC
SERVO AMP
PWM1
BIAS
SLED
PWM2
BIAS
PWM1
IN1.1
IN3.1
FOCUS
3
4
5
6
7
26
IN1.2
OUT1
IN2.1
IN2.2
OUT2
PWM2
IN3.2
PWM1
TRACKING
OUT3 25
OPOUT 24
OPIN+ 23
PWM2
BIAS
22
OPIN−
KA3018D2
VARIABLE
REGULATOR
8
9
21
SGND
VM12
REGOX
20
VM3
5V
5V
10
11
12
VREGX 19
MUTE
MUTE
DO2+
VCC
18
RESX
REGULATOR RESET
SLED MOTOR
TRACKING
ACTUATOR
17
16
15
DO3+
DO3-
DO2−
13 DO1+
FOCUS
ACTUATOR
14
PGND
DO1−
Thermal Shut Down Circuit
The IC over heats above 175°C and fails when overload condition continues for a long time. So, KA3027D2 has a thermal shut
down circuit to prevent this conditon.
15
KA3018D2
Typical Application Circuits 2
(Voltage control mode)
BIAS
VOLTAGE
1
VCC
28
27
REF
VCC
SERVO AMP
SLED
2
3
4
5
6
7
IN1.1
IN3.1
26
FOCUS
IN1.2
OUT1
IN2.1
IN2.2
OUT2
IN3.2
OUT3 25
TRACKING
OPOUT 24
23
22
OPIN+
OPIN-
KA3018D2
VARIABLE
REGULATOR
33uF
+
8
9
21
20
SGND
VM12
REGOX
VM3
5V
5V
10
11
12
VREGX 19
MUTE
MUTE
DO2+
VCC
18
RESX
REGULATOR RESET
SLED MOTOR
TRACKING
ACTUATOR
17
16
15
DO3+
DO3-
DO2-
13 DO1+
FOCUS
ACTUATOR
14
PGND
DO1-
16
KA3018D2
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.
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
12/1/00 0.0m 001
Stock#DSxxxxxxxx
2000 Fairchild Semiconductor International
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