ML1469 _______________________________________________________________ ML1469 4-channel BTL driver for CD players Application Features CD player VCD player DVD player z z z z z Built in 3.3V (V33) or 5.0V (V50) Voltage regulator Built in general purpose operational amplifier Built in thermal shutdown circuit Few external parts PackageAvailable : HSOP28 General Description The ML1469 is a 4-channel BTL driver for CD player motors and actuators. An internal 3.3V or 5.0V voltage regulator and general purpose op-amp are provided for variety of applications. Level Shiff + 13kΩ ch3-INA ch3-OUTB ch3-OUTA OP IN(+) OP IN(-) 20 19 18 17 16 15 1kΩ 10kΩ D.BUF 1kΩ 21 Vcc D.BUF Vcc ch3-INB 22 - + Level Shiff 10kΩ 23 Vcc 24 Vcc 25 BIAS IN ch4-INA 26 ch4-INB ch4-OUTB 27 D.BUF ch4-OUTA 28 D.BUF SUBGND Block Diagram 13kΩ + + - 50kΩ + T.S.D Driver-Mute 50kΩ 13kΩ 10kΩ 1kΩ 1kΩ 10kΩ 3 4 5 6 7 8 9 10 ch1-OUTB ch1- INA ch1-INB Tr-B Vreg OUT MUTE GND ch2-INB ch2-INA 11 12 ch2-OUTA 2 ch2-OUTB 1 13 14 OP-OUT - SUBGND - D.BUF 13kΩ D.BUF Level Shiff D.BUF + ch1-OUTA D.BUF + Level Shiff 10kΩ (3.3kΩ) 10kΩ T.S.D : Thermal Shutdown Circuit D.Buf : Drive Buffer BTL Driver for CD Player May, 2004 V1.3 1/5 ML1469 _______________________________________________________________ SUBGND ch4-OUTA ch4-OUTB ch4-INA ch4-INB BIAS IN Vcc Vcc ch3-INB ch3-INA ch3-OUTB ch3-OUTA OP IN(+) OP IN(-) Pin Configuration 28 27 26 25 24 23 22 21 20 19 18 17 16 15 10 11 12 13 14 SUBGND OP-OUT MUTE 9 ch2-OUTA Vreg OUT 8 ch2-OUTB 7 ch2-INA 6 ch2-INB 5 GND 4 Tr-B ch1-OUTB 3 ch1-INB 2 ch1- INA 1 ch1-OUTA ML1469 Pin Description Pin Pin Name Function Pin Pin Name Function 1 ch1-OUTA Driver channel 1 negative output 15 OP IN (-) Operational amplifier negative input 2 ch1-OUTB Driver channel 1 positive output 16 OP IN (+) Operational amplifier positive input 3 ch1-INA Driver channel 1 input 17 ch3-OUTA Driver channel 3 negative output 4 ch1-INB Driver channel 1 input, gain adjustment 18 ch3-OUTB Driver channel 3 positive output 5 Tr-B Connect to external transistor base 19 ch3-INA Driver channel 3 input 6 Vreg OUT Regulated voltage output (5.0V or 3.3V) 20 ch3-INB Driver channel 3 input, gain adjustment 7 MUTE Driver mute control input 21 Vcc Power supply 8 GND Ground 22 Vcc Power supply 9 ch2-INB Driver channel 2 input, gain adjustment 23 BIAS IN Bias amplifier input pin 10 ch2-INA Driver channel 2 input 24 ch4-INB Driver channel 4 input, gain adjustment 11 ch2-OUTB Driver channel 2 positive output 25 ch4-INA Driver channel 4 input 12 ch2-OUTA Driver channel 2 negative output 26 ch4-OUTB Driver channel 4 positive output 13 SUBGND Substrate ground 27 ch4-OUTA Driver channel 4 negative output 14 OP OUT Operational amplifier output 28 SUBGND Substrate ground BTL Driver for CD Player May, 2004 V1.3 2/5 ML1469 _______________________________________________________________ Absolute Maximum Ratings Parameter Symbol Ratings Units Supply Voltage VCC 13.5 V Power Dissipation Pd 1.7 *1 Storage Temperature Tstg W o -55 ~ +150 C Note 1 : Use base condition : 100x100mm, t=1.6mm, copper leaf 50%, glass epoxy mounting. Derating is done at 13.6mW/ oC for operation above Ta = 25 oC. Recommended operating conditions Parameter Symbol Ratings Units Operating Temperature TOPR -25 ~ +85 o Operating Voltage VOPR 5.0 ~ 12.0 V C Electrical Characteristics Parameter Quiescent Current Output Voltage Offset Output Voltage “H” Output Voltage “L” Gain (Close Circuit) Ripple Rejection Slew Rate Mute-off Voltage 3.3V / 5.0V Regulator Symbol ICC VOO VOHD VOLD GVC RR SR VMOFF Conditions No load VIN=0.1Vrms, f=1kHz VIN=0.1Vrms, f=100Hz VOUT=3Vp-p square wave, f=100kHz Output Voltage VREG IL=100mA Load Regulation Line Regulation Operational Amplifier Offset Voltage Input Bias Current “H” Level Output Voltage “L” Level Output Voltage Output Drive Current (Sink) Output Drive Current (Source) Voltage Gain (Open Circuit) Slew Rate Ripple Rejection Common Mode Rejection Ratio ∆VRL ∆VVCC IL=0 ~ 200mA VCC=6 ~9V, IL=100mA VOFOP IBOP VOHOP VOLOP ISINK ISOURCE GVO SROP RROP CMRR Min Typ Max Units 5.5 10.0 13.0 mA -40 40 mV 5.2 5.6 V 1.3 1.55 V 7.0 8.0 9.0 V 60 dB 2.0 V/uS 2.0 V 3.10 3.30 3.50 V 4.75 5.00 5.25 -50 0 10 mV -10 0 35 mV -2 0 2 20 300 6.0 50 ohm, at VCC 50 ohm, at ground VIN=75dBV,f=1kHz VOUT=4VP-P square, f=100kHz VIN=-20dBV,f=100kHz VIN=-20dBV,f=1kHz BTL Driver for CD Player 10 10 70 50 30 78 1 65 84 mV nA V 1.8 V mA mA dB V/uS dB dB May, 2004 V1.3 3/5 ML1469 _______________________________________________________________ Application Circuit SPINDLE SLED BIAS FOCUS TRACKING SERVO PRE AMP SLED MOTOR Vcc TRACKING ACT M 28 27 26 25 24 23 22 21 20 19 18 17 16 15 9 10 11 12 13 14 ML1469 V50 1 2 3 4 5 6 7 8 MUTE ON-Low OFF - High FOCUS ACT Vcc M SPINDLE MOTOR 5.0V Regulated Output 2SB1237 + 22uF Precautions for use (1) A thermal shut down circuit is built. The output current is muted, when the temperature of the chip reaches 175oC typical. (2) It the mute (Pin 7) voltage is open or less than 0.5V, the output current is muted. Under normal operating conditions, make sure to pull this pin above 2.0V. (3) If the bias pin (Pin 23) drops below 1.4V, the output current is muted. Make sure that under normal conditions, this pin is at 1.6V or above. (4) If the power supply voltage drops below 4.5V typical, the drivers are turned off. When the voltage exceeds 4.7V typical, the drivers return to their previous state. (5) The channel 4 output is muted in the event of a thermal shut down, mute on, bias pin voltage drop. Other sections are not muted. When muted, the internal bias voltage of the output pin becomes (roughly (VCC-VF)/2). (6) The built-in input resistance has a positive temperature coefficient of 1500ppm/oC. When changing the gain using an external resistance, the gain will change as the temperature of the resister changes. When using the built-in input resistance, there are virtually no gain variation due to temperature. (7) Make sue to connect a 0.47uF capacitor to the IC input to filter out voltage ripple. (8) Heat dissipation fins are attached to the GND on the inside of the package. Make sure to connect these to the external GND. (9) The capacitor connected between the regulator output (Pin 6) and the GND also serves to stop oscillation of the IC circuit. Consequently, make sure to use one with good temperature characteristics. BTL Driver for CD Player May, 2004 V1.3 4/5 ML1469 _______________________________________________________________ Mechanical Dimensions HSOP-28 Unit: mm (inch) 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. No liability will be accepted by the publisher for any consequence of its use. BTL Driver for CD Player May, 2004 V1.3 5/5