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UNISONIC TECHNOLOGIES CO., LTD UA8888S
5-CHANNEL BTL DRIVER FOR DVD PLAYER
DESCRIPTION
The UTC UA8888S is a 5-channel BTL driver IC for DVD player. It is developed to driving the motors and actuators and consists of two independent precision voltage regulators with adjustable range from 1.5V~4V.
LINEAR INTEGRATED CIRCUIT
FEATURES
* Voltage-type BTL drivers: - two channels : actuators of tracking and focus - two channels : sled and spindle motors. - one channel : bi-direction DC motor driver for tray. * Wide dynamic range: 9.0V (typ.) when VCC1= VCC2= 12V, at RL= 20 load. 4.0V (typ.) when VCC1=12V,VCC2=5V,at RL=15 load * Separating power of VCC1 and VCC2 is to improve power efficiency by a low supply voltage for tracking, focus, and spindle. * Built-in level shift circuit and mute mode. * Thermal shutdown protection. * Differential inputs for signal addition are provided by input OPs. The output structure for dual actuator driver is two power OP Amps in bridge configuration, and one OP Amp for Sled Motor Driver. * Spindle driver is a single input linear BTL driver. The output structure is two power OP Amps in bridge configuration. * Tray in-out driver functions as a DC motor driver supports forward/reverse control for tray motor. * Built-in regulator controllers: Adjustable range 1.5V ~ 4V
HSOP-28
*Pb-free plating product number: UA8888SL
ORDERING INFORMATION
Ordering Number Normal Lead Free Plating UA8888S-SH1-R UA8888SL-SH1-R UA8888S-SH1-T UA8888SL-SH1-T Package HSOP-28 HSOP-28 Packing Tape Reel Tube
UA8888SL-SH1-R (1)Packing Type (2)Package Type (3)Lead Plating (1) R: Tape Reel, T: Tube (2) SH1: HSOP-28 (3) L: Lead Free Plating, Blank: Pb/Sn
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PIN CONFIGURATION
VINFC TRB_1 REGO 2 VINSL+ REGO 1 FWD REV 1 2 3 4 5 6 7
LINEAR INTEGRATED CIRCUIT
28
MUTE
27 BIAS 26 25 24 23 22 VINTK TRB_2 NC VINLD GND
UA8888S
Vcc1 VOTRVOTR+ VOSL+ VOSLVOFCVOFC+ 8 9 10 11 12 13 14 21 20 19 18 17 16 15 VCTL NC Vcc2 VOLDVOLD+ VOTKVOTK+
PIN DESCRIPTION
PIN NO. PIN NAME FUNCTION 1 VINFC Input for focus driver 2 TRB_1 Connect to external transistor base 3 REGO2 Regulator voltage output, connect to external transistor collector 4 VINSL+ Input for the sled driver 5 REGO1 Regulator voltage output, connect to external transistor collector 6 FWD Tray driver forward input 7 REV Tray driver reverse input 8 VCC1 Vcc for pre-drive block and power block of sled and tray 9 VOTRTray driver output (-) 10 VOTR+ Tray driver output (+) 11 VOSL+ Sled driver output (+) 12 VOSLSled driver output (-) 13 VOFCFocus driver output (-) 14 VOFC+ Focus driver output (+) 15 VOTK+ Tracking driver output (+) 16 VOTKTracking driver output (-) 17 VOLD+ Spindle driver output (+) 18 VOLDSpindle driver output (-) 19 VCC2 Vcc for power block of spindle, tracking and focus 20 NC No Connection 21 VCTL Speed control input of tray driver 22 GND Ground 23 VINLD Input for spindle driver 24 NC No Connection 25 TRB_2 Connect to external transistor base 26 VINTK Input for tracking driver 27 BIAS Input for reference voltage 28 MUTE Input for mute control Notes: Symbol of + and - (output of drivers) means polarity to input pin. (Ex. if voltage of pin1 is high, pin14 is high.)
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www.unisonic.com.tw
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BLOCK DIAGRAM
MUTE 28 BIAS 27 VINTK TRB_2 26 25 NC 24 VINLD 23 GND MUTE and Thermal Shut down + 60K 60K + 225K GND 22 PGND VCTL 21
LINEAR INTEGRATED CIRCUIT
NC 20 VCC2 19 VOLD- VOLD+ VOTK- VOTK+ 18 17 16 15
VCC2 90K Actuator Driver(4x)
Spindle Driver(4X)
-
1.25V
+
1.25V VCC2 VCC2 VCC1 60K
+
225K +
150K Pre-DRV PGND VCC1 TRAY DRIVER Sled Driver(4X) Actuator Driver(4x) + 3 4 5 6 7 REV
-
60K 2
1
8 VCC1
9
10
11
12
13
14 VOFC+
VINFC TRB_1 REGO2 VINSL+ REGO1 FWD
VOTR- VOTR+ VOSL+ VOSL- VOFC-
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ABSOLUTE MAXIMUM RATINGS (Ta=25 )
PARAMETER Supply Voltage Power Dissipation (Note) Derating Rate Ta>25
LINEAR INTEGRATED CIRCUIT
SYMBOL VCC
RATINGS UNIT 15 V 1.7 W PD mW 13.6 Operate Temperature TOPR -35 ~ +85 Storage Temperature TSTG -55 ~ +150 Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
GUARANTEED OPERATING CONDITIONS (Ta=25 )
PARAMETER Power Supply Voltage SYMBOL VCC1 VCC2 RATINGS 4.5~13.2 4.5~VCC1 UNIT V V
ELECTRICAL CHARACTERISTICS
(Ta=25 , VCC1=12V, VCC2=5V, Bias=2.5V, RL=8/10/20/45, unless otherwise specified.) PARAMETER Voltage for Mute Quiescent Current Actuator Drivers Output Offset Voltage Maximum Output Voltage Voltage Gain Sled Motor Driver Output Offset Voltage Maximum Output Voltage Closed Loop Voltage Gain Spindle Motor Driver Output Offset Voltage Maximum Output Voltage Voltage Gain Gain Error by Polarity Tray Motor Driver Output Saturation Voltage VO(SAT2) Output Saturation Voltage Between F&R VO(SAT1) ON OFF SYMBOL VSTON VSTOFF IQ VO(OFF) VO(MAX) GV VO(OFF) VO(MAX) GV(CL) VO(OFF) VO(MAX) GV GV VO(SAT1) TEST CONDITIONS MIN 0 2.0 TYP MAX 0.5 5 UNIT V V mA mV V dB mV V dB mV V dB dB V V V dB V V A V mV mV
25 50 @10 Load VIN=Bias+0.2Vpp ac @1KHz 3.6 4.0 23.5 100 @20 Load VIN=Bias+0.2Vpp ac @1KHz 7.5 18 9.0 20 22 50 @8 Load VIN=Bias+0.2Vpp ac @1KHz VIN=Bias+0.2Vpp ac @1KHz Upper + Lower saturation IL=200mA Upper + Lower saturation IL=500mA Output saturation voltage 1 between FWD and REV 13.3 0 0.7 1.0 3.5 15.5 1 1.1 1.55 17.5 2 1.5 2.2 0.1 7.4 1.5 -0.3 180 1.5 -50 -25 9.2 11 Vcc 0.5 270 4.0 50 25
Output Adjustable Gain on "H" Side GV(ADJ) VCTL=2V Voltage Tray Motor Driver Input Logic High VI(H) Level Input Voltage Low VI(L) High Level Input Current II(H) VFWD=VREV=5V Regulator (Note 2) Output Voltage VOUT IL = 500mA(Note 3) Output Load Differential VO(DIFF) IL = 0 ~ 500mA Power supply Voltage Differential VVCC (VCC=4.5~8V), IL = 500mA Note: 1.This device is not designed for protection against radioactive rays. 2. Based on 8550C PNP application. 3. Based on 8550D.
0 0
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TYPICAL APPLICATION CIRCUIT
SERVO
LINEAR INTEGRATED CIRCUIT
U-COM
Tracking
Vcenter
MUTE
Focus
FWD
REV
Sled
Spindle
5V Tray voltage control
5v or 12V
10
F
NC
NC
M 19 18 17
Tracking coil 16 15
28
27
26
25
24
23
22
21
20
UTC UA8888S
1
10 K 47 F 5V ADJ 2.5V REGOUT 10 F
2
3
10K
4
16.4K
5
6
7
12 V
8
9 M
10
11 M
12
13
14
Focus coil
10 K
ADJ 3.3V REGOUT
47 F
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OPERATION NOTES
LINEAR INTEGRATED CIRCUIT
(1) The thermal shutdown function will be triggered while the chip junction temperature reach 150 typical, and then the output current is muted. The hysteresis is set to 25 typical, so the circuit will start up again when the chip temperature falling to 125 typical. (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) Pin 27(Bias pin) 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 (~0.1F) between VCC pin and GND pin as close as possible. (5) Ground-plane wiring up to GND is performed and should tightly connect to external GND. (6) Pin 20 and 24 should be floated due to reserve for internal test only. (7) When Vcc1 voltage drop to below 3.8V, schematic is muted. The schematic will return to work when Vcc1 rise up with a hysterisis of 0.3V(typ.) (8) Tray driver logic input: FWD (pin6) L L H H REV (pin7) L H L H VOTR+ (pin10) OPEN L H L VOTR- (pin9) OPEN H L L Function Open mode Reverse mode Forward mode Brake mode
Pin 6 and Pin 7 are designed to avoid simultaneous activation of upper and lower output transistors, however, in order to improve reliability, apply motor forward/reverse input once through open mode. We recommend time period for open longer than 10msec. The voltage between "H" side and "L" side output voltage is equal to three times(9.2dB Typ.) VTCL voltage(Pin21). And the "H" side and "L" side output voltage both equal to VCC/2 when in open mode and brake mode.
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www.unisonic.com.tw
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TESTING CIRCUIT
5V V23 10 F V28 28 V27 27 26 V26 25
LINEAR INTEGRATED CIRCUIT
8 OPEN 21 NC 20 19 V19 18 17 16
10
NC 24
23
22
15
UTC UA8888S
1 V1
2
3
4 V4
5 V6
6 V7
7 V8
8
9
10
11
12
13
14
10K 47 F ADJ 2.5V REGOUT 5V 10 ADJ 3.3V F REGOUT
10K
45 10K
20
10
16.4K
47 F
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www.unisonic.com.tw
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POWER DISSIPATION CURVE
LINEAR INTEGRATED CIRCUIT
2.0 1.7 1.5
PD (W)
1.0
0
25
50
75 Ta ( )
100
125
150
* 70mmx70mmx1.6mm glass epoxy board. * Reduced by 13.6mW for operating in above 25 .
UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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