4-ch BTL Motor Driver for CD Players Monolithic IC MM1469
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1 -ch BTL Motor Driver for CD Players Monolithic IC MM9 Outline This IC is a -ch BTL driver developed for driving motors and actuators for CD players. With built-in 3.3 (MM9PH) or 5. (MM9XH) regulator and general-purpose op-amp, it supports a variety of applications. Features. External resistor allows gain adjustment.. Few external parts 3. Built-in 3.3 or 5. regulator (external PNP-Tr required). Built-in general-purpose op-amp 5. Built-in thermal shutdown circuit Package HSOP-8A Applications. CD radio cassette players. CD Block diagram (MM9XH) D.BUF D.BUF T.S.D Level shift Level shift 3kΩ.5 3kΩ kω (3.3kΩ) kω 5kΩ 5kΩ 3kΩ T. S. D : Thermal Shut Down D. BUF : Driver Buffer D.BUF D.BUF 3kΩ Level shift Level shift DRIER MUTE kω kω D.BUF D.BUF D.BUF D.BUF note Constane in parenehesis is regulator output voltage 3.3(MM9PH).
2 Pin configuration ch OUT-A 8 SUBGND ch OUT-B 7 ch OUT-A ch IN-A 3 ch OUT-B ch IN-B 5 ch IN-A Tr-B 5 ch IN-B REG-OUT MUTE GND ch IN-B ch IN-A ch OUT-B ch OUT-A SUBGND OP OUT ch OUT A 5 OP IN( ) ch OUT B OP IN(+) 3 ch IN A 7 ch3 OUT A ch IN B 8 ch3 OUT B 5 Tr B 9 ch3 IN A REG OUT ch3 IN B 7 MUTE 8 GND 9 ch IN B 3 BIAS IN ch IN A ch IN B ch OUT B 5 ch IN A ch OUT A ch OUT B 3 SUBGND 7 ch OUT A OP OUT 8 SUBGND BIAS-IN ch3 IN-B ch3 IN-A ch3 OUT-B ch3 OUT-A OP IN(+) OP IN( )
3 Terminal explanations Pin No. Pin Name Function Internal equivalent circuit ch OUT A ch OUT A 7 ch3 OUT A 7 ch OUT A Driver ch negative output Driver ch negative output Driver ch3 negative output Driver ch negative output kω ch OUT B Driver ch positive output 7 ch OUT B Driver ch positive output Ω 7 8 ch3 OUT B Driver ch3 positive output ch OUT B Driver ch positive output 3 ch IN A ch IN A 9 ch3 IN A 5 ch IN A ch IN B 9 ch IN B ch3 IN B ch IN B Driver ch input Driver ch input Driver ch3 input Driver ch input Driver ch input, gain adjustment pin Driver ch input, gain adjustment pin Driver ch3 input, gain adjustment pin Driver ch input, gain adjustment pin 5 Tr B Connect to external transistor base kΩ 8 µa kω 5 kω Ω.5 kω REG OUT Constant voltage output, connects to external transistor collector µa.5 3kΩ 3kΩ
4 Terminal Explanations Pin No. Pin Name Function Internal equivalent circuit 7 MUTE Driver mute control input 7 5kΩ 5kΩ 8 GND GND GND 8 3 Substrate Substrate GND 8 GND OP OUT Operational amplifier output Substrate GND 75Ω 75Ω 5 OP IN( ) Operational amplifier negative input OP IN(+) Operational amplifier positive input 5 µa BIAS IN Bias amplifier input 3 5µA
5 Absolute Maximam Ratings (Ta=5 C) Item Symbol Rating Unit Storage temperature TSTG 55 ~ +5 C Supply voltage max. 3.5 Power dissipations Pd.7 * W * Use base condition:xmm, t=.mm, copper leaf 5%, glass epoxy mounting. Derating is done at 3.mW/ C for operation above Ta=5 C Recommended Operating Conditions Item Symbol Rating Unit Operating temperature TOPR 35 ~ +85 C Operational voltage OPR. ~ 9. * * Driver section can operate as low as 5.5. Electrical Characteristics (cc=8, Ta=5 C, f=khz, unless otherwise specified) Item Symbol Test Conditions Min. Typ. Max. Unit Quiescent current ICC No load ma offset OO m "H" OHD "L" OLD.3.55 Gain (Close circuit) GC IN=.rms, f=khz db Ripple rejection RR IN=.rms, f=hz db Slew rate SR OUT=3p p square wave, f=khz. /µs Mute-off voltage MOFF. 5 regulator REG IL=mA Output load variation RL IL= ~ ma 5 m Power supply voltage variation = ~ 9 (IL=mA) 5 m Operational Amplifier Offset voltage OFOP m Input bias current IBOP 3 na "H" level output voltage OHOP. "L" level output voltage OLOP.8 Output drive current (sink) ISINK 5Ω, at 5 ma Output drive current (source) ISOURCE 5Ω, at ground 3 ma oltage gain (open circuit) GO IN=75dB, f=khz 78 db Slew rate SROP OUT=p p square wave, f=khz /µs Ripple rejection RROP IN= db, f=khz 5 db Common mode rejection ratio CMRR IN= db, f=khz 7 8 db
6 Measuring Circuit µf/5 AC-IN µf/5 AC-IN 3 IL OFF ON A SW8 DC-IN SB37 SW DC-IN SW3 SW7 µf/5 5Ω SW8 SW to cc MΩ ch-out A ch-outb ch-in A ch-in B Tr-B reg-out MUTE GND ch-in B ch-in A ch-out B ch-out A GND (sub) OP-OUT SHORT SW7 GO GND (sub) ch-out A ch-out B SW3 SW ch-in A ch-in B BIAS-IN SW cc cc ch3-in B ch3-in A ch3-out B ch3-out A OP-IN(+) OP-IN( ) SW SW SW9 SW5 DC-IN.5 DC-IN3 SW SW SW RIPPLE IN 7µF/5 A.µF 5kΩ 5kΩ µf/5 AC-IN3 µf/5 AC-IN µf/5 µf/5 OP-IN µf/5 MΩ SW5
7 Application Circuit S E R O P R E A M P FOCUS TRACKING BIAS SLED SPINDLE TRACKING ACT to M M 9 X H FOCUS ACT SB37 to cc MUTE ON-LOW OFF-HIGH µf 5 REGULATOR OUT SLED MOTOR M M SPINDLE MOTOR Precautions for use () A thermal shut down circuit is built. When the temperature of the chip reaches 75ºC typ., the output current is muted. () If the mute (7PIN) voltage is open or is less than.5, the output current is muted. Under normal operating conditions, make sure to pull pin (7PIN) above.. (3) If the bias pin (3PIN) drops below., the output current is muted. Make sure that under normal operating conditions, this pin is at. or above. () If the power supply voltage drops below.5 typ., the drivers are turned OFF. When the voltage exceeds.7 typ., the drivers return to their previous state. (5) The channel 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 (-F)/). () The built-in input resistance has a positive temperature coefficient of 5ppm/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 sure to connect a.7µf 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) and the GND also serves to stop oscillation of the IC circuit. Consequently, make sure to use one with good temperature characteristics.
8 Characteristics Input oltage Output oltage() Driver Circuit(RL=) O () Input voltage IN () O () Output Offset voltage OO (m) REG () Input oltage Output oltage() Driver Circuit(=8) RL RL Ω Ω - Ω - Ω Input voltage IN () Supply oltage Output Offset oltage Driver Circuit Supply voltage () Output Load ariaion 5 Regulator 5. IL=mA Load Current IL (A)
9 Characteristics Input oltage Output oltage() Driver Circuit Input oltage Output oltage() Driver Circuit O () - - O () Input voltage IN () Input voltage IN () Supply oltage Output Offset oltage Driver Circuit Output Load ariation 5 Regulator Output Offset voltage OFFSET OO (ma) Supply voltage () Temperature oltage 5 Regulator reg () Temperature Ta (ºC) Supply oltage Output oltage Op Amp Output Current ISINK ISOURCE (ma) Supply voltage () reg () OHOP OLOP () Load Current IL (ma) Supply oltage Output oltage Op Amp 5 5 Supply voltage ()
10 Characteristics Temperature oltage 5 Regulator 5. IL=mA REG () Temperature Ta (ºC) OHOP OLOP () Output Current ISINK ISOURCE (ma) Supply oltage Output oltage Op Amp Supply voltage (ºC) Supply oltage Output oltage Op Amp 5 Supply voltage () OH OL Sink Source 5 5
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