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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD General Description
The AM5954A is a four-channel BTL driver IC for driving the motors and actuators in products for DVDplayer drivers. Two of the channels use current feedback to minimize the current phase shift caused by the influence of load inductance. This IC is an improved version of AZ5954. The AM5954A is available in HSOP-28 Package.
AM5954A
Features
* * * * Level Shift Circuit On Chip Thermal Shutdown Circuit On Chip Internal Standby Mode Built-in Thermal Shutdown Circuit
Applications
* * DVD Player Recorder Driver
HSOP-28
Figure 1. Package Type of AM5954A
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Pin Configuration
M Package (HSOP-28)
AM5954A
VINFC CFCerr1 CFCerr2 VINSL+ VINSLVOSL VNFFC FIN (GND)
1 2 3 4 5 6 7
28 27 26 25 24 23 22
STBY BIAS VINTK CTKerr1 CTKerr2 VINLD GND FIN (GND)
VCC PVCC1 PGND VOSLVOSL+ VOFCVOFC+
8 9 10 11 12 13 14
21 20 19 18 17 16 15
PVCC2 VNFTK PGND VOLDVOLD+ VOTKVOTK+
Figure 2. Pin Configuration of AM5954A (Top View)
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Pin Description (Note 1)
Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name VINFC CFCerr1 CFCerr2 VINSL+ VINSLVOSL VNFFC VCC PVCC1 PGND VOSLVOSL+ VOFCVOFC+ VOTK+ VOTKVOLD+ VOLDPGND VNFTK PVCC2 GND VINLD CTKerr2 CTKerr1 VINTK BIAS STBY Focus driver input For connection of capacitor for the error amp filter For connection of capacitor for the error amp filter Op Amp input (+) for the sled driver Op Amp input (-) for the sled driver Op Amp output for the sled driver Focus driver feedback pin Supply voltage Power supply voltage for sled driver block Ground for sled driver block Sled driver output (-) Sled driver output (+) Focus driver output (-) Focus driver output (+) Tracking driver output (+) Tracking driver output (-) Loading driver output (+) Loading driver output (-) Ground for actuator driver block Tracking driver feedback pin Power supply voltage for actuator driver block Ground Loading driver input For connection of capacitor for the error amp filter For connection of capacitor for the error amp filter Tracking driver input Bias input Standby control Function
AM5954A
Note 1: The indicated polarities for the output pin are for when all inputs are (+). The output H bridge power supply pins are PVCC2 for the focus, tracking channel, PVCC1 for the loading channel, and VCC for the pre-block and sled channel. Always ensure that VCC PVCC.
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Functional Block Diagram AM5954A
THERMAL SHUT DOWN
STANDBY
1
VINFC
10K 20K
28
STBY
2
CFCerr1 CFCerr2
7.5K
27
BIAS
3
20k 10k
26
VINTK
VINSL+ VINSLVOSL
4 5
7.5k 7.5k
25
CTKerr1
24
CTKerr2
7.5k
6 7
2 2
23
VINLD
22
GND
VNFFC
10K
8
VCC
VCC
10K
21
PVCC2
PVCC2 15k
9
PVCC1
PVCC1
25K
20
VNFTK
10
PGND
19
PGND
11
VOSL-
18
VOLDSLED DRIVER LOADING DRIVER
12
VOSL+
17
VOLD+
13
VOFC-
16
VOTKACUATOR DRIVER ACTUATOR DRIVER
14
VOFC+
15
VOTK+
VCC
PVCC2 PVCC1
Figure 3. Functional Block Diagram of AM5954A
Apr. 2005 Rev. 1. 1
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Ordering Information
AM5954A Circuit Type Package M28: HSOP-28
Package HSOP-28 Temperature Range 0 to 70oC Part Number Tin Lead AM5954AM28 Lead Free AM5954AM28-E1 Marking ID Tin Lead AM5954AM28 Lead Free AM5954AM28-E1 Packing Type Tube
AM5954A
E1: Lead Free Blank: Tin Lead
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Absolute Maximum Ratings (Note 2)
Parameter Supply Voltage Power Dissipation ESD(Human Model) Storage Temperature Range Symbol VCC, PVCC1/2 PD ESD TSTG Value 13.5 1.7 (Note 3) 2000 -55 to 150 Unit V W V
oC
Note 2: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Note 3: The power dissipation is reduced by 13.6mW for each increase in temperature of 1oC over 25oC.
Recommended Operating Conditions
Parameter Supply Voltage Operating Temperature
Symbol VCC PVCC1 PVCC2 TA
Min 4.0 4.0 4.0 0
Max 13.2 VCC VCC 70
Unit V V V
oC
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Electrical Characteristics
(TA = 25oC, VCC =PVCC1 = 12V, PVCC2 = 5V, VBIAS = 2.5V, RL1 = RL2 =RL3 = RL4 = 8, RD = 0.5, CFC=CTK = 100pF, unless otherwise specified.)
Parameter Quiescent Current Standby Current Standby-on Voltage Standby-off Voltage Actuator Driver Output Offset Current Maximum Output Amplitude Transmission Gain Sled Motor Driver/Pre Op Amp Common Input Voltage Range Input Bias Current Output Low Level Voltage Output Source Current Output Sink Current Sled Motor Driver Output Offset Voltage Maximum Output Voltage Closed-loop Voltage Gain Loading Motor Driver Output Offset Voltage VOOFLD VIN = VBIAS 2.0V Maximum Output Voltage VOMLD GVLD GVLD VIN = VBIAS 1.5V VCC= PVCC1 = 5V VIN = VBIAS 0.2V VIN = VBIAS 0.2V -50 7.5 3.6 13.5 0 9 3.8 15.5 1 17.5 2 50 mV V V dB dB VOOFSL VOMSL GVSL VCC = 5V VIN=VBIAS 1.5V VIN=VBIAS 0.2V -100 7.5 18.0 9 20.0 22.0 100 mV V dB VICM IIB VOL ISO ISI 0.3 1 VBIAS = 6V VCC = PVCC1 = 5V -0.3 -0.3 14 0.1 0.58 11.0 4.0 300 0.3 V V nA V mA mA IOO VOM gm VIN = VBIAS 1.5V VIN = VBIAS 0.2V -6 3.6 1.3 3.8 1.5 1.7 6 mA V A/V Symbol CC ST VSTON VSTOFF All channels off All channels on 0 2.0 Test Conditions Min Typ 18 Max 27 0.5 0.5 Unit mA mA V V
AM5954A
Closed-loop Voltage Gain Gain Error by Polarity
Apr. 2005 Rev. 1. 1
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Test Circuit AM5954A
100H
RD 100pF V2 100F 16V RL4 VO4 VO2
RL2
A
IO2
+ +
17 16
VST
VBIAS
VIN2
VIN4
15
+
28
27
26
25
24
23
22
21
20
19
18
VOLD- VOLD+ VOTK- VOTK+
AM5954A
VOSL- VOSL+ VOFC- VOFC+
1 2 3 4 5 6 7 8 9 10 11 12 13 14
VIN1
VIN3
V VOP A ICC
100F 16V V1 VO3 RL3
+
VO1
+ +
A
IO1
100pF
RD
RL1
100H
Figure 4. Test Circuit of AM5954A
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Typical Performance Characteristics AM5954A
5 4 3
Output Voltage: VO (V)
VCC=PVCC1=12V PVCC2=5V BIAS=2.5V
Output Voltage: VO (V)
12 8 4 0 -4 -8 -12
VCC=PVCC1=12V PVCC2=5V BIAS=2.5V
2 1 0 -1 -2 -3 -4 -5 -0.4 -0.2 0.0 0.2 0.4
RL=4+100uH RL=8+100uH RL=12+100uH RL=20+100uH
RL=20 RL=12 RL=8
-1.2 -0.8 -0.4 0.0 0.4 0.8 1.2
Input Voltage: VIN (V)
Input Voltage: VIN (V)
Figure 5. Driver I/O Characteristics (Focus and Tracking)
Figure 6. Driver I/O Characteristics (Sled)
4 3 2 1 0 -1 -2 -3 -4 -1.0
5
Op Amp Output Voltage: OP OUT (V)
VCC=PVCC=5V BIAS=2.5V
VCC=5V
4
Output Voltage: VO (V)
3
2
OP IN
+
OP OUT V
RL=4 RL=8 RL=12 RL=20
-0.5 0.0 0.5 1.0
1
0 0 1 2 3 4 5
Input Voltage: VIN (V)
Op Amp Input Voltage: OP IN (V)
Figure 7. Driver I/O Characteristics (Loading)
Figure 8. Op Amp I/O Characteristics
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Typical Performance Characteristics (Continued) AM5954A
60
10K
180
g
40
2.5V
10
90
20K 100
20
0
0
-90
-20 10k
VCC=12V PVCC=5V
100k 1M
-180 10M
Frequency: f (Hz)
Figure 9. Op Amp Phase-Frequency, AmplitudeFrequency Characteristics
2.0
70mmx70mm, thickness:1.6mm, copper foil coverage<3%. Power Dissipation: PD (W)
1.5
1.0
0.5
0.0 0 25 50 75 100 125
O
150
175
Ambient Temperature: TA ( C)
Figure 10. Power Dissipation Curve
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Phase: (deg)
Gain: g (dB)
V IN
Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Typical Application
DSP TRACKING VCENTER STANDBY LOADING FOCUS
AM5954A
-COM
SLED
TRACKING COIL
5V
LOADING MOTOR
M
Rd
28
27
26
25
24
23
22
21
20
19
18
17
16
15
AM5954A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
5V or 12V
M
5V or 12V SLED MOTOR Rd
FOCUS COIL
Figure 11. Typical Application of AM5954A in DVD Player
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Application Information
1. This IC has a built-in thermal shutdown circuit that mutes the output current when the chip temperature reachs 178oC (Typ.). The hysteresis is set to 25oC (Typ.), so the driver circuits start up again when the chip temperature falls to 153oC (Typ.). The driver buffer is switched off when the supply voltage falls below 3.5V (Typ.), and is switched back on when the voltage reaches 3.7V (Typ.) again. In case standby pin voltage is under 0.5V or opened, quiescent current is muted. Standby pin voltage should be over 2.0V for normal application. BIAS pin (pin 27) should be pulled up more than 1.2V. In case bias pin voltage is pulled down under 0.9V (Typ.), output current is muted. Insert the by-pass capacitor (approximately 0.1F) between VCC-pin and GND-pin as near as possible to this IC. Heat dissipation fins are attached to the GND inside the package. Make sure to connect them to the external GND. Supplement: (Current-feedback driver) The transmission gain (output current/input voltage) is given by: gm = 1 / (RD + RWIRE) (A/V) RWIRE is the total gold wire resistance inside the package (0.15 0.05 ) (Typ.).
AM5954A
2.
3.
4.
5.
6.
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet 4-CHANNEL BTL MOTOR DRIVER FOR DVD Mechanical Dimensions HSOP-28 Unit: mm(inch) AM5954A
17.890(0.704) 18.190(0.716)
0.204(0.008) 0.360(0.014)
10.000(0.394) 10.650(0.419) 7.400(0.291) 7.600(0.300)
0.400(0.016) 1.270(0.050)
0o ~ 8 o
5.050(0.199) 5.250(0.207)
0.800(0.031) TYP
0.230(0.009) 0.470(0.019)
0.100(0.004) 0.300(0.012)
2.180(0.086) 2.330(0.092)
2.280(0.090) 2.630(0.104)
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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Advanced Analog Circuits (Shanghai) Corporation
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BCD Semiconductor (Taiwan) Company Limited
Room 2210, 22nd Fl, 333, Keelung Road, Sec. 1, TaiPei (110), Taiwan Tel: +886-2-2758 6828, Fax: +886-2-2758 6892
IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others.

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