Fairchild Semiconductor KA3027D2 Datasheet
KA3027D2
4-Channel Motor Driver
www.fairchildsemi.com
Features
• 3-Channel Balance d TransformerLess(BTL) driver
• 1-Channel forwa r d-Reverse control DC moto r dr ive r
• Built-in thermal shutdown circuit
• Built-in mute circuit
• Operating s upply voltag e: 4.5~5.5V
• Corresponds to 3.3V or 5V DSP
Description
The KA3027D2 is a monolithic IC, suitable for a 1-ch (forward.reverse) control DC motor driver and a 3-ch motor
driver which drives the focus actuator,tracking actuator, and
sled motor of a CD-media system.
28-SSOPH-300
Typical Applications
• Notebook compact disk ROM (CD-ROM)
• Other portable compact disk media
©2000 Fairchild Semiconductor International
Ordering Information
Device Package Operating Temp.
KA3027D2 28-SSOPH-300 -35 °C ~ 85 °C
KA3027D2TF 28-SSOPH-300 -35 °C ~ 85 °C
Rev. 1.0.1
February. 2000.
1
Pin Assignments
MUTE3
MUTE1,2
27 26 25 24 23 22 21 20 19 18 17 16 15
28
KA3027D2
FIN
FWD
REV
REF
SGND
CTL
(GND)
IN3
OUT2
IN2.1
IN2.2
OUT1
IN1.1
IN1.2
KA3027D2
123
VCC
DO4-
DO4+
45
VM3,4
PGND1
7
6
DO3+
FIN
(GND)
DO3-
89
VM1,2
MUTE4
10 11
DO2-
12
13 14
DO1-
DO2+
PGND2
DO1+
2
KA3027D2
Pin Definitions
Pin Number Pin Name I/O Pin Function Description
1VCC- Signal V
2 DO4- O Drive4 Output (-)
3 DO4+ O Drive4 Output (+)
4 VM3, 4 - BTL CH3, 4 Power V
5 PGND1 - CH3, 4 Power Grou nd
6 DO3- O Drive3 Output (-)
7 DO3+ O Drive3 Output (+)
8 MUTE4 - CH4 Mute
9 VM1,2 - BTL CH1, 2 Power V
10 DO2- O Drive2 Output (-)
11 DO2+ O Drive2 Output (+)
12 PGND2 - CH1,2 Power Ground
13 DO1- O Drive1 Output (-)
14 DO1+ O Drive1 Output (+)
15 IN1.1 I OP-AMP CH1 Input (+)
16 IN1.2 I OP-AMP CH1 Input (-)
17 OUT1 O OP-AMP C H1 Output
18 IN2.1 I OP-AMP CH2 Input (+)
19 IN2.2 I OP-AMP CH2 Input (-)
20 OUT2 O OP-AMP C H2 Output
21 IN3 I OP-AMP C H 3 Input
22 SGND - Signal Ground
23 CTL I CH4 Motor Spe ed Control
24 FWD I CH4 Forw ard
25 REV I CH4 Reverse
26 REF I Bias Voltage Inp ut
27 MUTE1,2 I CH1, 2 Mute
28 MUTE3 I CH3 Mute
CC
CC
CC
3
Internal Block Diagram
KA3027D2
MUTE3
28 27 26 25 24 23 22 21 20 19 18 17 16 15
1
MUTE1,2
-
MUTE3
MUTE1,2
S W
M S C
-
2345
VCC
DO4-
REV
REF
+
+
VM3,4
VM3,4
DO4+
VM3,4
VM3,4
10K
FWD
LEVEL
SHIFT
BTLVM/2
10K
PGND1
-
6
CTL
-
DO3-
+
+
-
SGND
20K
+
BTLVM/2
10K
+
-
7
DO3+
10K
IN3
10K
TSD
MUTE4
89
MUTE4
10K
VM1,2
OUT2
10K
VM1,2
IN2.2
LEVEL
SHIFT
-
-
10 11
DO2-
-
+
+
10K
-
IN2.1
+
10K
+
VM1,2VM1,2
BTLVM/2
10K
+
-
DO2+
10K
10K
12
OUT1
LEVEL
SHIFT
BTLVM/2BTLVM/2
10K
PGND2
IN1.2
-
10K
+
-
-
+
-
13 14
DO1-
+
BTLVM/2
+
+
IN1.1
10K
10K
-
10K
DO1+
4
KA3027D2
Equivalent Circuits
MUTE INPUT POWER OUTPUT
8
27
50Ω
28
CH3 LEVEL SHIFT INPUT SIGNAL REFERENCE INPUT
50KΩ
50KΩ
2
6
10
131114
3
7
21
50Ω
10KΩ
26
50Ω
0.2kΩ
ERROR AMP INPUT LOADING CONTROL INPUT
15
18
50Ω50Ω
16
19
23
0.2KΩ
50Ω
ERROR AMP OUTPUT LOADING LOGIC INPUT
50Ω
17
20
24
25
50Ω
30KΩ
30KΩ
5
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