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 Package SA9258 HSOP-28-375-0.8 BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.7 2009.03.10 Page 1 of 11 SA9258 ABSOLUTE MAXIMUM RATING (Tamb=25°C, unless otherwise specified) Characteristics Symbol Value Unit Supply Voltage VDD 12 V Power Dissipation PD 1.7(Note) W Operating Temperature Topr -40~85 °C Storage Temperature Tstg -55~150 °C Maximum Output Current Imax 1 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=25°C, VCC=8.0V, unless otherwise specified) Parameter Operating Voltage Symbol Test conditions VCC Min. Typ. Max. Unit 5.5 8 12 V A REGULATOR PART Regulator Output Voltage VREG IL=100mA 4.75 5 5.25 V Load Regulation ΔVRL IL=0mA to 200mA -40.0 0 10.0 mV Line Regulation ΔVCC IL=200mA, VCC=6 to 9V -10.0 0 20.0 mV Quiescent Circuit Current ICCQ VI=0 5.5 9.5 13.5 mA Input Offset Voltage VOF - -5.0 0 5.0 mV Output Offset Voltage VOO - -30 0 30 mV Maximum Sink Current ISINK RL=4Ω, VCC 0.5 0.8 -- A Maximum Source Current ISOU RL=4Ω, GND 0.5 0.8 -- A Maximum Output Voltage VOM VI=2VRMS, 1kHz 2.5 3.0 -- V Closed Loop Voltage Gain AVF VI=0.1VRMS, 1kHz 4.5 6.5 7.5 dB B DRIVER PART HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.7 2009.03.10 Page 2 of 11 SA9258 Parameter Symbol Test conditions Min. Typ. Max. Unit Ripple Rejection Ratio RR VI=-20dB, 120Hz 60.0 80.0 -- dB Slew Rate SR 100Hz, squarewave 1.0 2.0 -- V/μs VOF1 - -5.0 0 5.0 mV IB1 - -- -- 300 nA VOH1 - 6 - - V Low Level Output Voltage VOL1 - Output Sink Current ISINK1 RL=50Ω, VCC C OP AMP Input Offset Voltage Input Bias Current High Level Output Voltage Output Source Current ISOURCE1 RL=50Ω, GND Open Loop Voltage Gain Ripple Rejection Ratio Slew Rate - 1.8 V 40 - mA 10 50 - mA GVO1 VIN=-75dB, f=1KHz 65 78 - dB RR1 VIN=-20dB, 120Hz 50 70 - dB SR Square, VOUT=2Vp-p, 0.5 1 - V/μs 70 84 - dB f=120KHz Common Mode Rejection Ratio 10 CMRR1 VIN=-20dB, 1KHz PIN CONFIGURATION PIN DESCRIPTION Pin No. Symbol I/O Description 1 OUT1A O Drive output 2 OUT1B O Drive output 3 IN1A I Drive input 4 IN1B I Drive input 5 REG 6 REO Regulator O Regulator output 7 MUTE I Mute 8 GND -- Ground 9 IN2B I Drive input HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.7 2009.03.10 Page 3 of 11 SA9258 Pin No. Symbol I/O Description 10 IN2A I Drive input 11 OUT2B O Drive output 12 OUT2A O Drive output 13 GND -- Ground 14 OPOUT O Opamp output 15 OPIN (-) I Opamp input (-) 16 OPIN (+) I Opamp input (+) 17 OUT3A O Drive output 18 OUT3B O Drive output 19 IN3A I Drive input 20 IN3B I Drive input 21 VCC -- Supply voltage 22 VCC -- Supply voltage 23 VREF I 2.5V bias voltage 24 IN4B I Drive input 25 IN4A I Drive input 26 OUT4B O Drive output 27 OUT4A O Drive output 28 GND -- Ground FUNCTIONAL DESCRIPTION 1. MUTE Function Mute Operation conditions Thermal shutdown ○ T≥175°C External muting ○ V(mute)≤ 1.4V or open 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) During mute, the output pins remain at the internal bias voltage, roughly (Vcc-Vf)/2. 3) 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.. 4) When the voltage of the mute pin is above 2V, the mute circuit is stopped and the output circuit is operated normally. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.7 2009.03.10 Page 4 of 11 SA9258 5) If the chip temperature rises above 175°C, then the TSD (Thermal Shutdown) circuit is activated and the output circuit is muted. 2. TSD (THERMAL SHUTDOWN) VREF Output Driver Bias R1 Qn R2 1) The VREF is the output voltage of the band-gap-referenced biasing circuit and acts as the input voltage of the TSD circuit. 2) The base-emitter voltage of the TR, Qn is designed to turn-on at below voltage. VBE=VREF * R2/(R1+R2)=460mV 3) When the chip temperature rises up to 175°C, 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(+) OPOUT Pins 14, 15 and 16 may be left open when the operational amplifier is not used. 4. DRIVER + + - + - 1) The voltage, VREF, is the reference voltage given by the BIAS voltage of the pin #23. 2) The input signal through the pin #3 is amplified by 10K/10K times and then fed to the level shift. 3) The level shift produces the current due to the difference between the input signal and the arbitrary reference signal. The current produced as +ΔV and -ΔV is fed into the driver buffer. 4) Driver buffer operates the power TR of the output stage according to the state of the input signal. 5) 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. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.7 2009.03.10 Page 5 of 11 SA9258 6) When the input voltage through the pin #3 is below the VREF, then the direction of the motor in forward direction. 7) When the input voltage through the pin #3 is above the VREF, then the direction of the motor in reverse direction. 8) 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 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn Oscillation prevention REV:1.7 2009.03.10 Page 6 of 11 SA9258 SA9258 TEST CIRCUIT HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.7 2009.03.10 Page 7 of 11 SA9258 TYPICAL APPLICATION CIRCUIT ELECTRICAL CHARACTERISTICS CURVES Fig.1 Driver I/O characteristics (variable load) Fig.2 Driver I/O characteristics (variable power supply) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.7 2009.03.10 Page 8 of 11 SA9258 Fig. 3 Power supply voltage vs. Fig. 4 Driver gain vs. temperature (RIN connected via output offset voltage Fig. 5 Regulator voltage vs. temperature gain adjustment pin) Fig. 6 Load current vs. regulator voltage Fig. 7 Operational amplifier vs. open loop HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.7 2009.03.10 Page 9 of 11 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 Http://www.silan.com.cn REV:1.7 2009.03.10 Page 10 of 11