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5-channel BTL Driver for DVD player ee AM5868S Sh a
Applications
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AM5868S Motor Driver ICs
aist a five-channel BTL driver IC for driving the motors and actuators such as used in DVD player and The AM5868S D .two independent precision voltage comparators. It supports a variety of applications. consists of w w w
BTL driver for CD, CD-ROM and DVD.
Features
1) Two comparators built-in: Two general-purpose voltage open collector output comparators are built-in. 2) Two channels are voltage-type BTL drivers for actuators of tracking and focus. Two channels are voltage-type BTL driver for sled and spindle motors. It is also built-in one channel bi-direction DC motor driver for tray. 3) Wide dynamic range [9.0V (typ.) when Vcc1= Vcc2= 12V, at RL= 20 load].
4) Separating power of Vcc1 and Vcc2 is to improve power efficiency by a low supply voltage for tracking, focus, and spindle. 5) Level shift circuit built-in. 6) Thermal shut down circuit built-in. 7) Mute mode built-in.
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8) Dual actuator drivers: A general purpose input OP provides differential input for signal addition. The output structure is two power OPAMPS in bridge configuration. 9) Sled motor driver: A general purpose input OP provides differential input for signal addition. The output structure is one power OPAMP in bridge configuration. 10) Spindle driver: Single input linear BTL driver. The output structure are two power OPAMPS in bridge configuration. 11) Tray in-out driver: The DC motor driver supports forward/reverse control for tray motor.
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AM5868S Motor Driver ICs
Absolute maximum ratings (Ta=25C)
Parameter Supply voltage Symbol Vcc1 Vcc2 Pd Topr Tstg Limits 13.5 Unit V W
Power dissipation *1.7 -35 ~ +85 Operate Temp range **-55 ~ +150 Storage Temp range *When mounted on a 70mm x 70mm x 1.6mm glass epoxy board. *Reduced by 13.6mW for each increase in Ta of 1 over 25. **Should not exceed Pd or ASO and Tj=150 C values
Guaranteed operating conditions (Ta=25C)
Parameter Power supply voltage Symbol Vcc1 Vcc2 Limits 4.3 ~ 13.2 4.3 ~ Vcc1 Unit V V
Block diagram
MUTE
BIAS
VINTK
OP1IN+
OP1IN-
VINLD
GND
VCTL
OP1OUT
VCC2
VOLD-
VOLD+
VOTK-
VOTK+
28
27
26
25
24
23
GND -
22
PGND
21
20
19
Vcc2 15K
18
17
16
15
10K
MUTE
25K +
+ 10K +
Spindle Driver(4X)
Actuator Driver(6x)
Thermal Shut down
Vcc2 Vcc2 Vcc1 + + 25K 25K 10K -
Sled Driver(4X) Pre-DRV
PGND Vcc1
Actuator Driver(6x)
TRAY DRIVER
+
10K
1
VINFC
2
OP2IN-
3
OP2IN+
4
5
6
FWD
7
REV
8
VCC1
9
VOTR-
10
VOTR+
11
VOSL+
12
VOSL-
13
VOFC-
14
VOFC+
VINSL+ OP2OUT
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Electrical characteristics
( Unless otherwise specified Ta=25, Vcc1=12V, Vcc2=5V, BIAS=2.5V, RL=8/10/20/45) Parameter Quiescent current Voltage for mute ON Voltage for mute OFF Output offset voltage Maximum output voltage Voltage gain Output offset voltage Maximum output voltage Closed loop voltage gain Output offset voltage Maximum output voltage Voltage gain Gain error by polarity Output saturation voltage 1 Output saturation voltage between F&R Output saturation voltage 2 Output adjustable gain on "H" side voltage High level input voltage Low level input voltage High level input current Input offset voltage Input common-mode voltage range Voltage gain Output sink current Saturation voltage Voofc VCMC Gvc IOSC VSC 0 50 1.0 200 6.0 250 2.0 mV Vcc1 V -1.5 V/mV RL15k mA Vout < 1.5V 400 mV IOSC4mA VIH VIL IIH 1.5 -0.3 180 Vcc 0.5 270 V V A VSAT1 VSAT1 VSAT2 VVtrH 0.7 1.0 7.4 1.1 1.55 9.2 1.5 0.1 2.2 11 V V V dB Upper + Lower saturation, IL=200mA Output saturation voltage 1 between FWD and REV Upper + Lower saturation, IL=500mA VCTL=2V Voofld Vomax Gvld Gvld 13.3 0 3.5 15.5 1 50 17.5 2 mV V dB dB @8 Load VIN=BIAS+0.2Vpp ac @1KHz VIN=BIAS+0.2Vpp ac @1KHz Voofsl Vomsl Gvsl 7.5 18 9.0 20 1 00 22 mV V dB @20 Load VIN=BIAS+0.2Vpp ac @1KHz Symbol Icc Vston Vstoff Voo Vom Gv Limit Typ 30 4.0 23.5 Unit mA V V mV V dB Conditions P.S
Min 0 2.0 3.6 -
Max 0.5 5 50 -
@10Load VIN=BIAS+0.2Vpp ac @1KHz
VFWD=VREV=5V
*This device is not designed for protection against radioactive rays.
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AM5868S Motor Driver ICs
Pin configuration
VINFC
1
28
MUTE
OP2IN-
2
27
BIAS
OP2IN+
3
26
VINTK
VINSL+
4
25
OP1IN+
OP2OUT
5
24
OP1IN-
AM5868S
FWD
6
23
VINLD
REV
7
22
GND
Vcc1
8
21
VCTL
VOTR-
9
20
OP1OUT
VOTR+
10
19
Vcc2
VOSL+
11
18
VOLD-
VOSL-
12
17
VOLD+
VOFC-
13
16
VOTK-
VOFC+
14
15
VOTK+
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AM5868S Motor Driver ICs
Pin description
PIN No 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 OP2INOP2IN+ VINSL+ OP2OUT FWD REV Vcc1 VOTRVOTR+ VOSL+ VOSLVOFCVOFC+ VOTK+ VOTKVOLD+ VOLDVcc2 OP1OUT VCTL GND VINLD OP1INOP1IN+ VINTK BIAS MUTE Input for focus driver Comparator 2 input (-) Comparator 2 input (+) Input for the sled driver Comparator 2 output Tray driver forward input Tray driver reverse input Vcc for pre-drive block and power block of sled and tray Tray driver output (-) Tray driver output (+) Sled driver output (+) Sled driver output (-) Focus driver output (-) Focus driver output (+) Tracking driver output (+) Tracking driver output (-) Spindle driver output (+) Spindle driver output (-) Vcc for power block of spindle, tracking and focus Comparator 1 output Speed control input of tray driver Ground Input for spindle driver Comparator 1 input (-) Comparator 1 input (+) Input for tracking driver Input for reference voltage Input for mute control Function
Notes) Symbol of + and - (output of drivers) means polarity to input pin. (For example, if voltage of pin1 is high, pin14 is high.)
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Power dissipation curve : Pd (W)
2.0
1.5 1.0
25
50
75
100
125
150
Ta()
*70mm x 70mmx1.6mm glass epoxy board. *Derating is done at 13.6mW/ for operating above Ta=25
Operation notes
1) The built-in thermal shutdown circuit mutes the output current when the chip temperature reaches 175 (typ.). The hysteresis is set to 25 (typ.), so the circuit will start up again when the chip temperature falling to 150 (typ.). 2) In case mute pin voltage is under 0.5V or NC, output current is muted (except for tray motor driver). Mute pin voltage should be more than 2.0V for normal application. 3) Bias pin (pin 27) should be pulled up to more than 1.2V. In case the bias pin voltage is pulled down below 0.9V (typ.), the output current is muted. 4) Insert the bypass capacitor (~ 0.1uF ) between Vcc pin and GND pin as close as possible. 5) Heat dissipation fins are attached to the GND on the inside of the package. Make sure to connect them to the external GND.
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AM5868S Motor Driver ICs
6) Tray driver logic input: 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 and pin7 is designed to avoid simultaneous activation of upper and lower output tr. ; however, in order to improve reliability, apply motor forward/reverse input once through open mode. We recommend time period for open 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 (9.2dB Typ.) VTCL(pin21). And, "L" side output voltage is equal to output saturation voltage.
Application circuit
SERVO
U-COM
Tracking
Vcenter
Spindle Tray voltage control
MUTE
Focus
FWD
REV
Sled
SERVO
SPIN+
SPIN-
5v or 12V
M
Tracking coil
28
27
26
25
24
23
GND -
22
PGND
21
20
19
Vcc2 15K
18
17
16
15
10K
MUTE
25K +
+ 10K +
Spindle Driver(4X)
Actuator Driver(6x)
Thermal Shut down
Vcc2 Vcc2 Vcc1 + + 25K 25K
Sled Driver(4X) Pre-DRV
PGND Vcc1
Actuator Driver(6x)
10K + 10K
TRAY DRIVER
1
2
SPIN+
3
SPIN-
4
5
SERVO
6
7
12V
8
9
M
10
11
M
12
13
14
Focus coil
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AM5868S Motor Driver ICs
Testing circuit
V20 V28 V27 V26 V25 V24 V23 OPEN V V19 8 10
28
27
26
25
24
23
GND -
22
PGND
21
20
19
Vcc2 15K
18
17
16
15
10K
MUTE
25K +
+ 10K +
Spindle Driver(4X)
Actuator Driver(6x)
Thermal Shut down
Vcc2 Vcc2 Vcc1 + + 25K 25K 10K PGND
Sled Driver(4X) Pre-DRV
Vcc1
Actuator Driver(6x)
TRAY DRIVER
+
10K
1
2
3
4
5
V
6
7
8
9
10
11
12
13
14
V1
V2
V3
V4 V5
V6
V7
V8
45
8
10
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AM5868S Motor Driver ICs
Packaging outline HSOP28
D 28 15
E
H
1 B b1
14
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A1
0.089
C
12
A" - A"
b1
A" - A" A a
c
c1
12
b
SYMBOL A A1 a B b b1 c c1 D E e H
MILLIMETERS Min. Max. 2.31 2.20 0.05 0.20 5.05 5.25 0.30 0.45 0.30 0.40 0.23 0.30 0.23 0.28 18.41 18.67 7.49 7.75 0.80 BSC 9.62 10.02
INCHES Min. Max. 0.091 0.087 0.002 0.008 0.199 0.207 0.012 0.018 0.012 0.016 0.009 0.012 0.009 0.011 0.725 0.735 0.295 0.305 0.031 BSC 0.379 0.394
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AM5868S Motor Driver ICs
Marking Identification
AMtek
Row I Row II Row III Row IV
Row I AMtek Row II Part number Row III Lot number Row IV Production week
Week number Year
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