2-PHASE DRUR DRIVER 20-SOP-300 KA8328D monolithic integrated circ

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2-PHASE DRUR DRIVER 20-SOP-300 KA8328D monolithic integrated circ

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KA8328D
2-PHASE DRUR DRIVER
20-SOP-300 KA8328D monolithic integrated circuit, suitable drum motor driver system.
FEATURES
2-phase, full-wave, linear BLDC motor driver with hall sensors Built-in voltage current control circuit. Built-in regulated power supply hall devices. Built-in thermal shutdown(TSD) circuit. Built-in Hall AMP. High output current.
ORDERING INFORMATION
Device KA8328D Package 20-SOP-300 Operating Temperature
BLOCK DIAGRAM
PUT218 PUT2+ GND2 (Power) GND1 (Power) PUT114 PUT1+ VCC1 (Power)
Each Block AMP1 VREG
OUT1
OUT2
AMP2
VCC2 (Power)
ICTL
VCTL
(Signal)
(Signal)
VHALL1
VCOM
VHALL2
VREG
97-D021 April 1997.
KA8328D
CONFIGURATION
PUT218 PUT2+ GND2 (Power) GND1 (Power) PUT114 (Power)
KA8328D
(Power)
ICTL
(Signal)
(Signal)
HALL1
VHALL2
DESCRIPTION
Symbol VCC2 ICTL VCTL VHALL1 VCOM VHALL2 VREG Description Supply Voltage (Power) Current Control Input Voltage Control Input Sypply Voltage (Signal) Ground (Signal) Connection Hall Signal Input Common Hall Signal Input Hall Signal Input Regulated Voltage Output Symbol VCC1 Output Output 1GND1 GND2 OUTPUT2+ OUTPUT Description Connection Supply Voltage (Power)
]A]B+
Output Output
Ground (Power) Ground (Power) Output Output
Connection Connection
97-D021 April 1997.
KA8328D
EQUIVALENT CIRCUITS
DRIVER INPUT(CURRENT)
DRIVER INPUT(VOLTAGE CONTROL)
VREF
HALL SIGNAL INPUT
REGULATOR OUTPUT
Band-Gap Referenced Biasing Circuit
DRIVER OUTPUT
Feedback Circuit
97-D021 April 1997.
KA8328D
ABSOLUTE MAXIMUM RATING (Ta=25
Characteristics Supply Voltage Output Current VREG Output Current ICTL Input Current VCOM Input Voltage Power Dissipation Operating Temperature Range Storage Temperature Symbol IREG, ICTL, VCOM, TOPR TSTG Value VREG-1 -20~+75 -40~+125 Unit
Remark
Heat Sink Ambient Temperature Ambient Temperature
GRAPH
Power Dissipation,
Free
Ambient Temperature,
OPERATING CONDITION
Characteristics Operating Supply Voltage Symbol Value 8~16 Unit
97-D021 April 1997.
KA8328D
ELECTRICAL CHARACTERISTICS (Ta=25 VCC=14V, unless otherwise specified)
Characteristics Quiescent Current Regulated Voltage Regulated Voltage Regulated Voltage ICTL Input Voltage Current Gain Current Gain Current Gain Ratio Output Transistor Saturation Voltage (Upper) Output Transistor Saturation Voltage (Lower) Motor Drive Motor Drive VOLTAGE CONTROL VCTL Offset Voltage VCTL Input Current Voltage Control Gain VOFFL IVCTL -200 0.38 0.51 0.70 VCTL=0~VREG VCTL=2.5V Symbol VREG2 VREG5 VREG8 VICTL VS-UA3 VS-DA3 IO-A1 IO-B1 4100 4100 4900 4900 5700 5700 Units Note VCC=14V VCC=14V VCC=14V, IREG=20mA VCC=14V, IREG=40mA VCC=14V, IREG=10mA VHALL1=2.5V, VCOM=2.2V ICTL=100uA VHALL1=2.5V, VCOM=2.2V ICTL=100uA GA2/GB2 IO=800mA IO=800mA VHALL1=2.5V, VCOM=2.2V ICTL=100uA VHALL1=2.5V, VCOM=2.2V ICTL=100uA
VCTL VCTL=VREF(2.3)+0.5V VREF(2.3)+1.0V VHALL1=2.5V, VCOM=2.2V
Notes) Graph. Voltage Control Gain
VCTL
VREF (2.3)
VCTL(V)
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KA8328D
97-D021 April 1997.
KA8328D
APPLICATION INFORMATION
whole system concept KA8328D briefly diagrammitized follows. Namely though amplifier whose ON-OFF action operated acordance with output signals hall sensors which detects rotor position. servo current (ICTL) inputted input terminal controls output current (IO)of output terminal motore speed. gain whole system, determines characteristic output input following diagram.
Input Terminal Output Terminal
Hall Signal
Motor
ICTL
CTL,
<Whole system concept diagram>
<Input-output characteristic graph>
Also output current (IO) controlled through inputting servo voltage (VCTL) instead servo current (ICTL) which applied input terminal. this case, using converter following diagram, servo voltage (VCTL) converted turn into current (IVO) control output current (IO).
Input Terminal ICTL
Hall Signal
Output Motor Terminal
VCTL
Converter
<Whole system concept diagram>
O,MAX
VREF (2.3V)
VCTL
Input-output characteristic graph
97-D021 April 1997.
KA8328D
whole system concept explained above expressed more detailed block diagram follows.
ICTL Converter VREG
Hall Input
Motor
Whole system concept diagram
AMP, (Feedback), OUT(Driver) blocks which determine, gain (AT). hall input functions ON-OFF switch which drived hall signal. amplifier which amplifies input current times. feedback circuit which returns feedback output current (IO), OUT(Driver) power switch part which drives motor. VREG constant voltage source shich supply stabilized voltage each block. overheat protective circuit which protect from overheat, that event overheat protect through grounding input part (Driver) part. applied, then I1=100 I2-I3=400 input-output characteristic, input current ICTL=100 (=100 IO=490mA, current gain become 4900 times. output current detected through output current detecting resistance (R2), transferred feedback circuit (GM), then again returned (Driver) feedback, output current kept constant desired value. result motor speed also kept constant.
97-D021 April 1997.
KA8328D
With having output signal hall sensor which detects rotor position servo current voltage) which controls output current following diagram, differential amplifiers Hall Input parts operated that current flow proper phase motor.
Motor phase signal Hall Sensor Hall Input (For Motor Phase)
Hall Input Hall Sensor Motor phase signal Servo Circuit Converter (for motor phase)
<Input Part Diagram>
followings simplified circuit diagram input part circuit. Firstly when input control current (ICTL) inputted, operated, differential amplifier operated inaccordance with output signal Hall sensor, current(I1) outputted. Next when input control voltage(VCTL) inputted, inut voltage higher than standard voltage(VREF, 2.3v), operated, operated current source(IS).
VREG
VREG
VCTL VREF (for motor phase)
differential amplifier
described about only
Input Part Circuit
97-D021 April 1997.
KA8328D
constant voltage source(VREG) function keeping output voltage always constant, with having voltage input, following diagram. VREG always keeps constant voltage even though internal temperature changes because BandGap Referenced Biasing Circuit used reference voltage source constant voltage source. VREG becomes supply voltage source each internal block external Hall sensors.
VREG Hall Sensor
Band-Gap-Referenced Biasing Circuit
each BLOCK
Constant Voltage Source Diagram
following simplified circuit constant voltage source(VREG). output voltage(VB) BandGap Reference Biasing Circuit reference voltage, always maintains constant voltage. other input voltage(VR) changes according state output voltage. output voltage always maintains constant voltage with voltage difference input voltage
BandGap Referenced Biasing Circuit
Constant Voltage Source Circuit
97-D021 April 1997.
KA8328D
OUT(Driver) function driving motor through amplifying driving current proper level. Freewheeling Diode designed terminal each protect making motor current freewheeling when turned off. motor current kept constant through being detected resistance(R3) returned feedback again Feedback circuit. Accordingly motor rotative velocity also kept constant.
back
97-D021 April 1997.
KA8328D
TEST CIRCUIT
SW17 /10W SW15 SW13 SW14
/10W
SW12
KA8328D
SW11
ICTL
VCTL
SW10
SW18
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KA8328D
OUTPUT WAVEFORMS
HALL
INPUT
APPLICATION CIRCUIT
Phase Phase
KA8328D
97-D021 April 1997.
KA8328D
PACKAGE DIMENSIONS (Unit
20-SOP-300
97-D021 April 1997.

2-PHASE DRUR DRIVER 20-SOP-300 KA8328D monolithic integrated circ

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