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Silicore
5-CH MOTOR DRIVER
DESCRIPTION
The D9259 is a monolithic integrated circuit, and suitable for 5-ch motor driver which drivers focus actuator, tracking actuator, sled motor, spindle motor and loading motor of CD system.
D9259
Outline Drawing
FEATURE
1 phase, full-wave, linear DC motor driver. Built-in TSD (Thermal shutdown) circuit. Built-in 5V regulator (with an external PNP TR). Built-in mute circuit. Built-in loading motor speed control circuit. Wide operating supply voltage range: 6V~13.2V
TARGET APPLICATION
CD-PLAY VIDEO-CD CAR-CD
BLOCK DIAGRAM AND PIN CONNECTION
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PIN DESCRIPTION
Pin Symbol NO. 1 DO1.1 2 3 4 5 6 7 8 9 10 11 12 13 14 DO1.2 DI1.1 DI1.2 REB REO MUTE GND1 DI5.1 DI2 DO2.1 DO2.2 GND2 DI5.2 I/O O O I I O O I I I O O I Description Focus output 1 (-) Focus output 2 +(c) Focus input 1 Focus input 2 Regulator base Regulator output 5V Mute Ground 1 Loading input 1 Spindle input 2 Spindle output Spindle output Ground 2 Loading input 2 +(c) -(c) Adjustable(c) Pin Symbol NO. 15 DO5.1 16 17 18 19 20 21 22 23 24 25 26 27 28 DO5.2 DO3.1 DO3.2 DI3 LD CTL Vcc1 Vcc2 VREF DI4.1 DI4.2 DO4.1 DO4.2 GND3 I/O O O O O I I I I I O O -
D9259
Description Loading output 1(+) Loading output 2(-) Sled output -(c) Sled output +(c) Sled input Loading motor speed control Supply voltage 1 Supply voltage 2 2.5V bias Tracking input 1(Adjustable) Tracking input 2 Tracking output 1 Tracking output 2 Ground 3 +(c) -(c)
EQUIVALENT CIRCUITS
Driver input (Except for loading motor driver) Driver output
Loading motor driver input
Loading motor speed control input
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EQUIVALENT CIRCUITS
Mute input Bias input
D9259
ABSOLUTE MAXIMUM RATINGS (Ta=25C)
Characteristic Maximum Supply Voltage Maximum current output Power dissipation Operating temperature Storage temperature * NOTE: Symbol VccMAX IOMAX PD Topr Tstg Value 18 1 1.7* -25~+75 ae ae -55~+150 Unit V A W
1. When mounted on 76mm x114mm x1.57mm PCB (Phenolic resin material) 2. Power dissipation reduces 13.6mW/ae 3. Do not exceed Pd and SOA. for using above Ta=25ae
RECOMMENDED OPERATING CONDITION (Ta=25C)
Characteristics Operating supply voltage Symbol Vcc Value 6~13.2 Unit V
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ELECTRICAL CHARACTERISTICS
(Unless otherwise specified: Ta=25C, Vcc=8V, f=1kHz, RL=8)
D9259
Characteristic Quiescent circuit current Mute-on current Mute-on voltage Mute-off voltage Regulator Part Output voltage Load regulation Line regulation Input offset voltage Output offset voltage 1 Maximum sink current 1 Maximum source current 1 Maximum output voltage 1 Maximum output voltage 2 Closed-loop voltage gain Ripple rejection ratio Slew rate Loading Motor Driver Part Output voltage 1
Test conditions Under no-load Pin7=GND
Symbol ICCQ IMUTE VMON VMOFF
Min. 7
Typ. 10 4
Max. 13 7 0.5
Unit mA mA V V
2 4.7 -50 -20 -15.0 -40 0.25 0.25 2.5 5 40 1.0 2.5 2.5 0.5 0.5 0.4 0.4 3.3 -4.5 6.5 60 2.0 3.1 3.1 1.0 1.0 300 300 -40 -40 3.8 3.8 1.5 1.5 700 700 40 40 -3.7 8 5.0 0 0 5.3 50 80 15.0 40
IL=100mA IL=0200mA IL=100mA Vcc=613V
VREG VRL3 Vcc VIO VOO1
V mV mV mV mV A A V V dB dB V/s V V V V mV mV mV mV
Driver Part Except for loading motor driver(c)
RL=8Vcc RL=8GND Vin=0.7V Vin=7V Vin=0.1VRMS Vin=0.1VRMS Vin=1VRMS f=120Hz square wave VPIN14=0V 120Hz
ISINK ISOURCE VOM1 VOM2 AVF RR SR VO1 VO2 VOCTL1 VOCTL2 VRL1 VRL2 VOO2 VOO3
Unless otherwise specified RL=45 VPIN9=5V
VCTL=opened(c)
Output voltage 2 RL=45 VPIN9=0V VPIN14=5V Output voltage regulation 1 RL=45 VPIN9=5V VPIN14=0V CTL(c) VCTL=3.5V4.5V Output voltage regulation RL=45 VPIN9=0V VPIN14=5V 2 CTL(c) VCTL=3.5V4.5V VPIN9=5V VPIN14=0V Loading regulation 1 IL=100400mA VPIN9=0V VPIN14=5V Loading regulation 2 IL=100400mA Output offset voltage 2 VPIN9=5V VPIN14=5V Output offset voltage 3 VPIN9=0V VPIN14=0V
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TEST CIRCUIT
SW13 3
D9259
2 8 SW12 8 1 Vcc SW14 3 2 8 1 Vcc 3 2 1 Vcc 8 SW19 8 SW20 Tracking 2 SW18 Ripple Vcc 100uF CTL IL Sled 8 SW9 450 1 2 SW15 3 SW10 3 2 1
~
~
2 1
~
3 SW21 8 2 1 28 Vcc 27
1
3 2.5V SW17
3
Vcc SW11 3 2 8 1 IL Vcc
26
25
24
23
22
20 SW16 21 20
19
18
17
16
15
D9259
Vcc 1 1 2 3 SW1 8 8 1 2 Focus 2 SW4 3 3 KSB772 100uF Loading forward 4 5 Mute SW5 Vcc 6 7 8 9 10 3 8 SW6 Spindle IL 11 12 8 13 14 1 2 SW7 3 Vcc 1 2 8 SW8 3 Loading reverse
Vcc
1
2
Vcc 1 2 3 SW2
SW3 8
~
~
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APPLICATION CIRCUIT
D9259
SERVO PRE-AMP
Foucs Tracking Bias Sled Spindle
CONTROLLER
Control Forward Reverse
Vcc Tracking Actuator 102
Sled Motor M
Loading Motor M
28
27
26
25
24
23
22
21
20
19
18
17
16
15
D9259
1 2 3 4 5 Vcc 6 7 8 9 10 11 12 13 14
APPLICATION INFORMATION
1. MUTE Pin#7 High Low Mute circuit Turn-off Turn-on
When the mute pin#7 is open or the voltage of the mute pin#7 is below 0.5V, the mute circuit is activated so that the output circuit will be muted. When the voltage of the mute pin is above 2V, the mute circuit is stopped and the output circuit is operated normally. If the chip temperature rises above 175C, then the TSD (Thermal shutdown) circuit is activated and the output circuit is muted. SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn
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100uF
Foucs Actuator
KSB772
5V out
Mute Low:ON High:OFF
M Spindle Motor
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2. TSD (THERMAL SHUTDOWN) The VREF
BG
D9259
is the output voltage of the band-gap-referenced biasing
circuit and acts as the input voltage of the TSD circuit. The base-emitter voltage of the TR, Q11 is designed to turn-on at below voltage. VBE=VREF BGxR12/ R11+R12(c) =400mV
When the chip temperature rises up to 175C, then the turn-on voltage of the Q11 would drop down to 400mV. Hence, the Q11 would turn on so the output circuit will be muted.
3. REGULATOR The VREF
BG
is the output voltage of the band-gap-referenced biasing
circuit and is the reference voltage of the regulator. The external circuit is composed of the transistor, KSB772 and a capacitor, 100F, and the capacitor is used as a ripple eliminator and should have a good temperature characteristics. The output voltage, VOUT is decided as follows. VOUT=VREF BG x2=2.5x2=5V (R2=R3) R2=R3
4. LOADING MOTOR DRIVER
The input voltage of (5V and 0V) or (0V and 5V) pairs are applied to the input pin#9 and #14 respectively. When the input voltage are applied to the input pin#9 and #14, then the output of the comparator is decided depends on the input voltage status. As shown in the above diagram, the difference V [VREF1+ 1xR(c) ]-[VREF1- 1 R(c) ], is applied to the both
terminals of the motor. The direction of the motor is decided by the voltage difference, +V and -V.
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The output characteristics is as follows,
D9259
If pin#9=5V and pin#14=0V, then pin#15=+V and pin#16=-V, hence the motor turn in forward direction. If pin#9=0V and pin#14=5V, then pin#15=-V and pin#16=+V, hence the motor turn in reverse direction. If pin#9=5V and pin#14=5V, then V =0V, hence the motor stop. If pin#9=0V and pin#14=0V, then V =0V, hence the motor stop. When the rotation speed control of the loading motor is desired, refer to the follows.
5. LOADING MOTOR SPEED CONTROL
If the torque of the loading motor is too low when it is used with the pin#20 open, then it should used as the above diagram. The desired torque could be obtained by selecting the appropriate resistor R as shown in the left diagram. If it is necessary, the zener diode can be used as in the right diagram. The maximum torque is obtained when the applied voltage at pin#20 is about 6.8V (at Vcc=8V).
6. DRIVER (EXCEPT FOR LOADING MOTOR DRIVER)
The voltage, VREF, is the reference voltage given by the bias voltage of the pin#23. The input signal through the pin#3 is amplified by 10k/10k times and then fed to the level shift. The level shift produces the current due to the difference between the input signal and the arbitrary reference signal. The current produced as +I and-I is fed into the driver buffer. Driver Buffer operates the power TR of the output stage according to the state of the input signal. SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn
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D9259
The output stage is the BTL Driver and the motor is rotating in forward direction by operating TR Q1 and TR Q4. On the other hand ,if TR Q2 and TR Q3 is operating, the motor is rotating in reverse direction. When the input voltage through the pin#3 is below the VREF, then the direction of the motor in forward direction. When the input voltage through the pin#3 is above the VREF, then the direction of the motor in reverse direction. If it is desired to change the gain, then the pin#4 or pin#24 can be used.
7. When the bias voltage of the pin#23 is below 1.4V, then the output circuit will be muted. Hence for the normal operation, the bias voltage should be used in 1.6V~6.5V
8. Connect a by-pass capacitor, 0.1F between the supply voltage source.
9. Radiation fin is connecting to the internal GND of the package. Connect the fin to the external GND.
ELECTRICAL CHARACTERISTICS CURVES
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