4-CH MOTOR DRIVER KA9258BD monolithic integrated circuit, suitabl
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KA9258BD
4-CH MOTOR DRIVER
KA9258BD monolithic integrated circuit, suitable 4-CH motor driver which drives tracking actuator,focus actuator, sled motor loading motor CD/CD-ROM/DVD system, also drive spindle motor system. 28-SSOPH-375
FEATURES
1-phase, full-wave, linear motor driver Output gain adjustable Built OP-Amp Built Mute function Built Level shift circuit Built Thermal shutdown function Operating Range 6~13.2V
ORDERING INFORMATION
Device Package Operating Temperature
KA9258BD 28-SSOPH-375
BLOCK DIAGRAM
LEVEL SHIFT
LEVEL SHIFT
REGULATOR LEVEL SHIFT
MUTE LEVEL SHIFT
MIC-98D002 August 1988
KA9258BD
DESCRIPTION
Symbol DO1.1 DO1.2 DI1.1 DI1.2 MUTE GND1 DI2.1 DI2.2 DO2.1 DO2.2 GND2 OPOUT OPIN OPIN DO3.1 DO3.2 DI3.1 DI3.2 VCC1 VCC2 VREF DI4.1 DI4.2 DO4.1 DO4.2 GND3 Description Drive Output Dirve Output Drive Input Drive Input Regulator Regulator Output Mute Ground Drive Input Drive Input Drive Output Dirve 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
MIC-98D002 August 1988
KA9258BD
ABSOLUTE MAXIMUM RATING
Characteristics Supply Voltage Power Dissipation Operating Temperature Storage Temperature Maximum output current Symbol TOPR TSTG Imax Value @1.7 -25~+75 -55~+150
Unit
When mounted 50mmx50mmx1mm (Phenolic resin material). Power dissipation reduces using above exceed SOA.
Pd[mW]
3,000 2,000 1,000 Ambient Temperature,
ELECTRICAL CHARACTERISTICS VCC=8V, Unless Otherwise Specified)
REGULATOR PART Characteristics Regulator Output Voltage Load Regulation Line Regulation DRIVE PART Characteristics Quiescent Circuit Current Input Bias Current Input Offset Voltage Output Offset Voltage Maximum Sink Current Maximum Source Current Maximum Output Voltage Closed Loop Voltage Gain Ripple Rejection Ratio Slew Rate IBOP VOFOP ISNK ISOU VI=2VRMS, 1KHz VI=0.1VRMS, 1KHz -20dB, 120Hz 100Hz, Squarewave MIC-98D002 August 1988 VI=0 -5.0 60.0 80.0 V/us Symbol Test Conditions VI=0 13.5 Unit Symbol VREG Test Conditions IL=100mA IL=0mA 200mA IL=200mA, VCC=6 4.75 -40.0 -10.0 5.25 10.0 20.0 Unit
KA9258BD
APPLICATION INFORMATION
MUTE PIN# HIGH OPEN Mute Circuit Turn-off Turn-on Turn-on
Output Driver Bias
When mute open voltage mute below 0.5V, mute circuit activated that output circuit will muted. When voltage mute above mute circuit stopped output circuit operated normally. chip temperature rises above then TSD(Thermal Shutdown) circuit activated output circuit muted. TSD(THERMAL SHUTDOWN)
VREF Output Driver Bias
VREF output voltage Band-Gap-Referenced Biasing Circuit acts input voltage circuit. base-emitter voltage TR,Q11 designed turn-on below voltage. VREF BG*R12/(R11+R12)=460mV When chip temperature rises then turn-on voltage would drop down 460mV. (Hysteresis Hence, would turn output circuit will muted.
OP-AMP OP-Amp integrated convenience.
AMP-I(+)
AMP-O
AMP-I(-)
MIC-98D002 August 1988
KA9258BD
DRIVER
BUFFER Level Shift BUFFER
VREF (2.5V)
voltage, VREF, reference voltage given BIAS voltage #23. input signal through amplified 10K/10K times then level shift. level shift produces current difference between input signal arbitrary reference signal. current produced into driver buffer. Driver Buffer operates power output stage according state input signal. output stage Driver motor rotating forward direction operating other hand, operating, motor rotating reverse direction When input voltage through below VREF then direction motor forward direction. When input voltage through above VREF then direction motor reverse direction. desired change gain, then used.
Connect by-pass capacitor, between supply voltage source.
VCC1 VCC2
Radiation connecting internal package. Connect external GND.
MIC-98D002 August 1988
KA9258BD
TEST CIRCUIT
SW17 SW16
PC-V
SW15
SW14
OPEN SHORT
SW10
KA9258BD
2.5V
KS8772
SW13 SW11
SW12
MIC-98D002 August 1988
MUTE
PIN21,22
KA9258BD
APPLICATION CIRCUIT
SLED MOTOR SPINDLE SERVO SLED BIAS TRACKING FOCUS TRACKING ACTUATOR
SPINDLE MOTOR
KA9258BD
MUTE KSB772 REG. OFF: HIGH
FOCUS ACTUATOR
HERMAL SHUT DOWN CIRCUIT breaked down heat when overload condition continue long time. KA9258D have thermal shut down circuit prevent this case. that time temperature rise over circuit operating protect against breakdown.
MIC-98D002 August 1988
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