5CH BTL Motor Drive IC
Semiconductor
http:// www.auk.co.kr
S3055
Description
The S3055 contains 4 channels voltage-type BTL drivers for Tracking
and focus, sled, spindle motors and it contains also 1 channel of bi-directional
tray motor. Furthermore it embraces 2 independent precision voltage
regulators with adjustable range from 1.24V to 4V.
It supports various applications with pb free and heat-sink package.
Application
◈ CD-Player
SSOPH-28N
◈ CD-ROM
◈ DVD-Player
With Heat-sink
Features and Benefits
◈ 1 Channel is bi-directional DC motor driver for tray.
ORDERING INFORMATION
◈ 4 Channels are voltage-type BTL drivers for
actuators, sled and spindle motors.
Product
Marking
Package
S3055
S3055
SSOPH-28N
◈ Separating power of Vcc1 and Vcc2 is to improve power efficiency.
◈ Built in Level shift circuit.
◈ Built in Thermal shut down circuit.
◈ Built in Mute mode.
▲ Marking Detail Information
◈ Built in 2 Regulator controllers.
Adjustable range [ 1.25V to 4V ]
S3055(①)
YYWW(②)
◈ Dual Actuator drivers
A general purpose input OP Provides differential input for signal addition.
The output structure is two power OPAMPS in bridge configuration.
① Device Code
② Year & Week Code
◈ Sled motor driver
A general purpose input OP provides differential input for signal addition.
The output structure is one power OPAMP in bridge configuration.
◈ Spindle driver
Single input linear BTL driver. The output structure are two power
OPAMPS in bridge configuration.
◈ Tray Bi-directional driver
The DC motor driver supports forward/reverse control for tray motor.
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S3055
◈ Internal Block Diagram & Pin Assignment
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◈ Pin Description
NO
SYMBOL
I/O
DESCRIPTION
1
VINFC
I
Input for focus driver
2
TRB_1
O
Connect to external transistor base
3
REG02
I
Regulator voltage feedback, Connect to external bias resistor.
4
VINSL
I
Input for sled driver
5
REG01
I
Regulator voltage feedback, Connect to external bias resistor.
6
FWD
I
Tray driver input signal for forward direction
7
REV
I
Tray driver input signal for reverse direction
8
VCC1
PWR
9
VOTR-
O
Tray driver output (-)
10
VOTR+
O
Tray driver output (+)
11
VOSL+
O
Sled driver output (+)
12
VOSL-
O
Sled driver output (-)
13
VOFC-
O
Focus driver output (-)
14
VOFC+
O
Focus driver output (+)
15
VOTK+
O
Tracking driver output (+)
16
VOTK-
O
Tracking driver output (-)
17
VOLD+
O
Spindle driver output (+)
18
VOLD-
O
Spindle driver output (-)
19
VCC2
PWR
20
NC
I
No Connection
21
VCTL
-
Speed control input of tray driver
22
GND
-
Ground
23
VINLD
I
Input for spindle driver
24
NC
-
No Connection
25
TRB_2
O
Connect to external transistor base
26
VINTK
I
Input for tracking driver
27
BIAS
I
Input for reference voltage
28
MUTE
I
Input for mute control
VCC for pre-drive block and power block of sled & tray
VCC for power block of focus, tracking and spindle
Symbol of + and – [ output of drives ] means polarity to input pin.
For example : if voltage level of pin1 is high, pin14 is high
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S3055
◈ Absolute Maximum Ratings ( Ta = 25℃ )
Parameter
Symbol
Limits
Unit
Supply Voltage
VCC1/VCC2
13.5
V
Power Dissipation
Pd
1.7
W
Operate Temperature Range
Topr
-35 ~ +85
℃
Storage Temperature Range
Tstg
-55 ~ +150
℃
Symbol
Limits
Unit
VCC1
4.3 ~ 13.2
V
VCC2
4.3 ~ VCC1
V
[ Pd ] When mounted on a 70mm×70mm×1.6mm glass epoxy board.
Reduced by 13.6mW for each increase in Ta of 1℃
[ Tstg ] Should not exceed Pd or SOA and Tj=150℃ values
◈ Guaranteed Operating Conditions ( Ta = 25℃ )
Parameter
Power Supply Voltage
◈ Power Dissipation Curve [ Pd ]
◈ 70mm×70mm×1.6mm glass epoxy board .
◈ De-rating is done at 13.6mW/℃ for operating above Ta=25℃
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S3055
◈ Electrical characteristics
( Unless otherwise specified Ta=25℃, Vcc1=12V, Vcc2=5V, BIAS=2.5V, RL=8Ω/12Ω/20Ω/45Ω)
NO
1
2
3
Characteristics
Symbol
Specification
Condition
Unit
Iqc
Vston
Vstoff
MIN.
0
2
TYP.
30
-
MAX.
0.5
5
mA
V
V
Voo
Vom
Gv
@12Ω Load
VIN=BIAS+0.2Vpp ac @1khz
-50
3.6
21.5
4
23.5
50
25.5
mV
V
dB
Voosl
Vomsl
Gvsl
@20Ω Load
VIN=BIAS+0.2Vpp ac @1khz
-100
7.5
18.0
9.0
20.0
100
22.0
mV
V
dB
@8Ω Load
VIN=BIAS+0.2Vpp ac @1khz
-50
13.5
3.5
15.5
50
17.5
mV
V
dB
0.7
1.1
1.5
V
-
-
0.1
V
1
1.55
2.2
V
7.4
9.2
11
dB
Quiescent current
Voltage for Mute on
Voltage for Mute off
< Actuator Driver: Focus, Tracking >
4
5
6
Output Offset Voltage
Maximum output Voltage
Voltage Gain
< Sled Motor Driver >
7
8
9
Output Offset Voltage
Maximum output Voltage
Voltage Gain
< Spindle Motor driver >
10
11
12
Output Offset Voltage
Maximum output Voltage
Voltage Gain
Voold
Vomld
Gvld
< Tray Motor driver >
Vsat1
Upper + Lower saturation
IL=200mA
Output saturation voltage1
between FWD and REV
13
Output saturation Voltage1
14
Output saturation voltage
between F&R
15
Output saturation Voltage2
Vsat2
Upper + Lower saturation
IL=500mA
16
Output adjustable gain on
"H" side voltage
VvtrH
VCTL=2V
△Vsat1
< Tray Motor driver input logic >
17
High level input voltage
VIH
1.5
-
Vcc
V
18
Low level input voltage
VIL
-0.3
-
0.5
V
19
High level input current
IIH
-
180.0
270.0
uA
VFWD=VREV=5V
< Regulator >
20
Output voltage
Vreg
IL=500mA
2.35
3.1
2.5
3.3
2.65
3.5
V
21
Load Regulation
Vld
IL=0~500mA
-50.0
0.0
50.0
mV
22
Line Regulation
Vle
Vcc=4.5~8V, IL=500mA
-25.0
0.0
25.0
mV
[Regulator] It is based on STA353 PNP application. Vreg can be set to other voltage with 5% deviation.
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S3055
Application Information
1. Thermal Shut Down Circuit
Focus, Tracking, Tray, Spindle,
Sled, Con. Current
Reg. Bandgap
Voltage [ 1.25V ]
R2
R3
IHys
R1
R4
The built-in thermal shutdown circuit mutes the output current when the chip temperature
reaches 175℃ (typ.). The hysteresis is set to 25℃ (typ.) by IHys,
so the circuit will start up again when the chip temperature falling to 150℃ (typ.)
2. Regulator Circuit
Internal Circuit
Ref. Voltage
5V
External Circuit
STA353
+
[ 1.25V ]
Vout
R1
R2
-. The Ref. Voltage is generated by the internal circuit [Band gap reference]
-. It needs to attach an external power TR [* AUK PNP Power TR : STA353*]
-. The output voltage of the regulator is calculated depend on R1 and R2’s values.
Vout = (1+ R1/R2) × 1.25
3.3V [R1: 16.5K / R2 : 10K]
2.5V [R1: 10K / R2 : 10K]
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S3055
3. Bias & Mute Circuit
Focus, Tracking, Sled
Spindle Con. Current
Mute
Bias
R1
R3
R2
R4
Bias pin (pin 27) should be pulled up to more than 1.2V. In case the bias pin’s voltage is pulled down
below 1.2V (typ.), the output current is muted, also Mute pin is same as Bias pin.
[Except Tray, Regulator, Comparator, those are only controlled by Vcc1. ]
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S3055
4. BTL Driver Circuits [Focus, Tracking, Sled, Spindle]
R4
VI-Converter
R3
Level Shift
Va(+)
Iconv
Vin
R1
Bias
-
-
R2
+
Vo(+)
+
PAMP1
Iconv(+)
+
-
Iconv(-)
Vo(-)
+
PAMP2
R5
Va(-)
R6
-
Pref
R7
BTL Driver Circuits are composed of VI-Converter, Level Shifter and Output power AMP.
VI-Converter converts voltage of Vin into current [Iconv ]
Iconv = (Vin – Bias ) / R1[10KΩ]
[ Closed loop Voltage Gain Calculation ]
Va(+) = (R2×Iconv ) + Pref
Va(-) = (-R5×Iconv) + Pref
Vo(+) = Va(+)×(1 + R4/R3 )
Vo(-) = Va(-)×( 1 + R7/R6 )
[ * R2 = R5 , R3 = R6, R4 = R7 * ]
Focus, Tracking closed loop Voltage Gain [ R2 = 25KΩ, R3 = 10KΩ, R4 = 20KΩ ]
Gain = 20 log [{ Vo(+) - Vo(-) } / (Vin - Bias) ]
= 20 log [{ Va(+)×( 1 + R3/R4 ) - Va(-)×( 1 + R6/R7 ) } / ( Vin – Bias ) ]
= 20 log [{(R2×Iconv ) + Pref }×( 1 + R4/R3 )]– [{(-R5×Iconv) + Pref }×( 1 + R7/R6 )]
(Vin – Bias )
= 20 log [2×(25K/10K)×{1+(20K/10K)} ]
= 23.5 [dB]
Sled closed loop Voltage Gain [R2 = 25KΩ, R3 = 10KΩ, R4 = 10KΩ ]
Gain = 20 log [2× (25K/10K)×{1+(10K/10K)} ]
= 20 [dB]
Spindle closed loop Voltage Gain [R2 = 15KΩ, R3 = 10KΩ, R4 = 10KΩ]
Gain = 20 log [2× (25K/10K)×{1+(10K/10K)} ]
= 15.5 [dB]
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S3055
5. Tray driver logic input
Speed Control
Driver 1
R2
VOTR(+)
-
R1
+
VOTR(-)
VCTL
REV
FWD
R3
R5
R4
R6
Driver 2
Switching Logic
FWD [pin6]
REV [pin7]
VOTR+ [pin10]
VOTR- [pin9]
FUNCTION
L
L
OPEN
OPEN
Open mode
L
H
L
H
Reverse mode
H
L
H
L
Forward mode
H
H
L
L
Brake mode
Input circuit of pin6 [FWD] and pin7 [REV] is designed to avoid simultaneous activation of upper and
lower output power TR. however, in order to improve reliability, apply motor forward/reverse
input once through open mode. We recommend that the time Period of open state is longer than 10msec.
“H” side output voltage on output voltage [VOL+, VOL-] varies depending on output control terminal
for tray. [pin21]“H” side output voltage is set three times (9.3dB typ.) VTCL [pin21], and “L” side
output voltage is equal to output saturation voltage.
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S3055
Characteristic Diagrams
Fig. 1 VCC - IQC
Fig. 2 Temperature - IQC
Fig. 3 VOM - VCC
Fig.4 VOM - VCC
Ω
Ω
Fig. 5 VOM - VCC
Ω
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◈ Testing Circuit
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S3055
◈ Package Dimension
SSOPH-28N
With Heat-sink
KSD-I7A006-001
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S3055
The AUK Corp. products are intended for the use as components in general electronic
equipment (Office and communication equipment, measuring equipment, home
appliance, etc.).
Please make sure that you consult with us before you use these AUK Corp. products
in equipments which require high quality and / or reliability, and in equipments which
could have major impact to the welfare of human life(atomic energy control, airplane,
spaceship, transportation, combustion control, all types of safety device, etc.). AUK
Corp. cannot accept liability to any damage which may occur in case these AUK Corp.
products were used in the mentioned equipments without prior consultation with AUK
Corp..
Specifications mentioned in this publication are subject to change without notice.
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