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SA9258
4-CH BTL DRIVER FOR CD PLAYER WITH 5V OUTPUT VOLTAGE
DESCRIPTION
The SA9258, an IC for CD players, has a 4-channel BTL driver, 5V regulator (attached PNP transistor required), standard operational amplifier, and internal reset output linked to an internal thermal shutdown circuit. The driver has gain adjustment input pins for each channel, allowing gain to be set to the desired value. Also, the internal level shift circuit helps reduce the number of attached components.
FEATURES
* 1-phase, full-wave, linear DC motor driver * Gain is adjustable with an attached resistor. * Internal standard operational amplifier. * Internal 5V regulator. (required attached PNP transistor) * Internal thermal shutdown circuit with hysteresis capabilities.
ORDERING INFORMATION
Device SA9258 Package HSOP-28-375-0.8
BLOCK DIAGRAM
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SA9258
ABSOLUTE MAXIMUM RATING (Tamb=25C, unless otherwise specified)
Characteristics Supply Voltage Power Dissipation Operating Temperature Storage Temperature Maximum Output Current Symbol VDD PD Topr Tstg Imax Value 12 1.7(Note) -40~85 -55~150 1 Unit V W C C A
Note: 1. When mounted on 76mm x 114mm x 1.57mm PCB (Phenolic resin material). 2. Power dissipation reduces 13.6mW / C for using above Tamb=25 C 3. Do not exceed Pd and SOA (Safe Operating Area).
2.0
1.5
1.0
0.5
0
0
25
50
75
100
125
150
175
Ambient temperature: ( Tamb )
ELECTRICAL CHARACTERISTICS (Tamb=25C, VCC=8.0V, unless otherwise specified)
Parameter Operating Voltage A REGULATOR PART Regulator Output Voltage Load Regulation Line Regulation B DRIVER PART Quiescent Circuit Current Input Offset Voltage Output Offset Voltage Maximum Sink Current Maximum Source Current Maximum Output Voltage Closed Loop Voltage Gain ICCQ VOF VOO ISINK ISOU VOM AVF VI=0 RL=4, VCC RL=4, GND VI=2VRMS, 1kHz VI=0.1VRMS, 1kHz 5.5 -5.0 -30 0.5 0.5 2.5 4.5 9.5 0 0 0.8 0.8 3.0 6.5 13.5 5.0 30 ---7.5 mA mV mV A A V dB VREG VRL VCC IL=100mA IL=0mA to 200mA IL=200mA, VCC=6 to 9V 4.75 -40.0 -10.0 5 0 0 5.25 10.0 20.0 V mV mV Symbol VCC Test conditions Min. 5.5 Typ. 8 Max. 12 Unit V
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SA9258
Parameter Ripple Rejection Ratio Slew Rate C OP AMP Input Offset Voltage Input Bias Current High Level Output Voltage Low Level Output Voltage Output Sink Current Output Source Current Open Loop Voltage Gain Ripple Rejection Ratio Slew Rate Common Mode Rejection Ratio VOF1 IB1 VOH1 VOL1 ISINK1 RL=50, VCC -5.0 -6 10 10 65 50 0.5 70 0 -40 50 78 70 1 84 5.0 300 1.8 mV nA V V mA mA dB dB V/s dB Symbol RR SR Test conditions VI=-20dB, 120Hz 100Hz, squarewave Min. 60.0 1.0 Typ. 80.0 2.0 Max. --Unit dB V/s
ISOURCE1 RL=50, GND GVO1 RR1 SR CMRR1 VIN=-75dB, f=1KHz VIN=-20dB, 120Hz Square, VOUT=2Vp-p, f=120KHz VIN=-20dB, 1KHz
PIN CONFIGURATION
PIN DESCRIPTION
Pin No. 1 2 3 4 5 6 7 8 9 Symbol OUT1A OUT1B IN1A IN1B REG REO MUTE GND IN2B O I -I I/O O O I I Drive output Drive output Drive input Drive input Regulator Regulator output Mute Ground Drive input Description
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SA9258
Pin No. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Symbol IN2A OUT2B OUT2A GND OPOUT OPIN (-) OPIN (+) OUT3A OUT3B IN3A IN3B VCC VCC VREF IN4B IN4A OUT4B OUT4A GND I/O I O O -O I I O O I I --I I I O O -Drive input Drive output Drive output Ground Opamp output Opamp input (-) Opamp input (+) Drive output Drive output Drive input Drive input Supply voltage Supply voltage 2.5V bias voltage Drive input Drive input Drive output Drive output Ground Description
FUNCTIONAL DESCRIPTION
1. MUTE Function Thermal shutdown External muting Mute T175C V(mute) 1.4V or open Operation conditions
Output Driver Bias 7
1)
The circuit is muted during thermal shutdown and during the mute-on state. In each case, only the drivers are muted.
2) 3) 4)
During mute, the output pins remain at the internal bias voltage, roughly (Vcc-Vf)/2. 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.
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SA9258
5) If the chip temperature rises above 175C, then the TSD (Thermal Shutdown) circuit is activated and the output circuit is muted. 2. TSD (THERMAL SHUTDOWN)
VREF Output Driver Bias Qn R2
R1
1) 2) 3)
The VREF 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, Qn is designed to turn-on at below voltage. VBE=VREF * R2/(R1+R2)=460mV When the chip temperature rises up to 175C, then the turn-on voltage of the Qn would drop down to 460mV. (Hysteresis: 25) and, the Qn would turn on so the output circuit will be muted.
3. OP-AMP OP-Amp is integrated in the IC for user convenuence.
OPIN(+) OPIN(-)
Pins 14, 15 and 16 may be left open when the operational amplifier is not used. 4. DRIVER
++
OPOUT
1) 2) 3) 4) 5)
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 +V and -V is fed into the driver buffer. Driver buffer operates the power TR of the output stage according to the state of the input signal. 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.
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SA9258
6) 7) 8) 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 #24 can be used.
5. RADIATION FIN IS CONNECTING TO THE INTERNAL GND OF THE PACKAGE. Connect the fin to the external GND. 6. REGULATOR This is a typical series regulator that generates a reference voltage internally. A PNP low saturation type transistor must be connected.
REG
Attached PNP VOUT
+-
VREF
REO Oscillation prevention
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SA9258
TEST CIRCUIT
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SA9258
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SA9258
TYPICAL APPLICATION CIRCUIT
ELECTRICAL CHARACTERISTICS CURVES
Fig.1 Driver I/O characteristics (variable load) Fig.2 Driver I/O characteristics (variable power supply)
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SA9258
Fig. 3 Power supply voltage vs. output offset voltage Fig. 4 Driver gain vs. temperature (RIN connected via gain adjustment pin)
Fig. 5 Regulator voltage vs. temperature
Fig. 6 Load current vs. regulator voltage
Fig. 7 Operational amplifier vs. open loop
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SA9258
PACKAGE OUTLINE
HSOP-28-375-0.8 UNIT: mm
Disclaimer: * Silan reserves the right to make changes to the information herein for the improvement of the design and performance without further notice! * All semiconductor products malfunction or fail with some probability under special conditions. When using Silan products in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety standards strictly and take essential measures to avoid situations in which a malfunction or failure of such Silan products could cause loss of body injury or damage to property. * Silan will supply the best possible product for customers!
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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2009.03.10 Page 10 of 11

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