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| HIGH PERFORMANCE BRUSHLESS DC MOTOR DRIVER BC10/BC20 MICROTECHNOLOGY HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739 PRELIMINARY FEATURES * 10V TO 500V MOTOR SUPPLY AT 20 A CONTINUOUS AND 40 A PEAK OUTPUT CURRENT, BC20 * 10V TO 100V MOTOR SUPPLY AT 10 A CONTINUOUS AND 20 A PEAK OUTPUT CURRENT, BC10 * OPERATION WITH 10.8V TO 16V VCC, ALLOWING NOMINAL 12V OR 15 V VCC SUPPLIES * THREE PHASE FULL BRIDGE OPERATION WITH 2 OR 4 QUADRANT PWM * AUTOMATIC BRAKING WHEN USING 2 QUADRANT PWM * THERMAL PROTECTION * TOP AND BOTTOM RAIL SHORT CIRCUIT PROTECTION * ANTI SHOOT THROUGH DESIGN * 50 KHZ INTERNALLY SET PWM FREQUENCY, WHICH MAY BE LOWERED WITH EXTERNAL CAPACITOR S * SELECTABLE 60 OR 120 COMMUTATION SEQUENCES * COMMUTATION TRANSITIONS OUTPUT FOR DERIVING SPEED CONTROL * MAY BE USED OPEN LOOP, OR WITHIN A FEEDBACK LOOP * ANALOG MOTOR CURRENT MONITOR OUTPUT, MAY BE USED FOR TORQUE CONTROL OR FOR TRANSCONDUCTANCE AMPLIfiER DRIVE. * ANALOG REFERENCE, FEEDBACK, AND TORQUE INPUTS DESCRIPTION The BC10 and BC20 Brushless DC Motor Controllers provide the necessary functions to control conventional 3 phase brushless dc motors in an open loop or closed loop system. The BC10 is able to control motors requiring up to 1 kW continuous input power; the BC20 is able to control larger motors requiring up to 10 kW continuous input power. Both controllers drive the motors, generate the PWM, decode the commutation patterns, multiplex the current sense, and provide error amplification. Operation with either 60 or 120 commutation patterns may be selected with a logic input. Current sense multiplexing is used to make the current monitor output always proportional to the active motor coils current. Therefore the current monitor output may be used in generating transconductance drive for easy servo compensation. The controller may generate 4-quadrant PWM for applications requiring continuous transition through zero velocity, or 2 quadrant PWM for electrically quieter operation in unidirectional applications. Direction of rotation may be reversed in 2-quadrant mode by using the reverse command input. When in 2-quadrant mode if the motor is stopped or decelerating dynamic braking is automatically applied. In this way deceleration profiles may be followed even when VCC HV HV using 2-quadrant PWM. V+ TOP DRIVE 1 1/2 BRIDGE 1 OUT 1 S1 APPLICATIONS * 3 PHASE BRUSHLESS MOTOR CONTROL SSC 2Q OE HS1 HS2 HS3 120 REV REF IN + BOTTOM DRIVE 1 COMMUTATION DECODE LOGIC BRIDGE CONTROL LOGIC V+ PWM COMPARATOR PWM TOP DRIVE 2 BOTTOM DRIVE 2 1/2 BRIDGE 2 OUT 2 S2 - FB + - TEMP SENSING OVERTEMP SHUTDOWN TOP DRIVE 3 V+ BOTTOM DRIVE 3 1/2 BRIDGE 3 OUT 3 S3 POWER FAULT LOGIC PWM OSCILLATOR OVERCURRENT CURRENT SENSING SIGNAL CONDITIONING HV RTN HV RTN BLOCK DIAGRAM TORQUE CT FAULT MOTOR I GROUND APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com Powered by ICminer.com Electronic-Library Service CopyRight 2003 BC10/BC20 BC10 ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS BC20 500V 16V 40A 20A TDB -0.3V to Vcc +0.3 -.03V tp 5.35V 300C 150C -65 to 150C -25 to 85C ABSOLUTE MAXIMUM RATINGS MOTOR VOLTAGE, V+ CIRCUIT SUPPLY, Vcc OUTPUT CURRENT, peak OUTPUT CURRENT, continuos POWER DISSIPATION, internal ANALOG INPUT VOLTAGE DIGITAL INPUT VOLTAGE TEMPERATURE, pin solder, 10s TEMPERATURE, junction1 TEMPERATURE RANGE, storage OPERATING TEMPERATURE, case 100V 16V 20A 10 A TBD -0.3V to Vcc+0.3V -0.3V to 5.35V 300C 150C -65 to 150C -25 to 85C SPECIFICATIONS PARAMETER ERROR AMP OFFSET VOLTAGE BIAS CURRENT GAIN, DC2 COMMON MODE VOLTAGE RANGE UNITY GAIN BANDWIDTH INPUT AMP STAGE GAIN2 INPUT IMPEDANCE2 COMMON MODE VOLTAGE COMMON MODE REJECTI0N DIFFERENTIAL OFFSET UNITY GAIN BANDWIDTH OUTPUT TOTAL Ron EFFICIANCY, 10A SWITCHING FREQUENCY CURRENT, continuous, BC10 CURRENT, peak, BC10 CURRENT, continuous, BC20 CURRENT, peak, BC20 UNITY GAIN BANDWIDTH POWER SUPPLY VOLTAGE, V+ (BC10) VOLTAGE, V+ (BC20) VOLTAGE, Vcc TEST CONDITIONS MIN TYP MAX 3.3 4 20.2 Vcc-2.5 UNITS mV pA db V MHz V/V Kohm db MHz 19.8 0 20 1.4 9.5 46 10 2 Vcc/2 80 TBD 1.4 TBD HIGH 50 10.5 10 20 20 40 1.4 10 10 10.8 10 20 20 40 Khz A A A A MHz V V V 100 500 16 NOTES: 1. 2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. Set internally. The BC10 and BC20 are constructed from static sensitive components. ESD handling procedures must be observed. CAUTION APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739 Powered by ICminer.com Electronic-Library Service CopyRight 2003 TYPICAL PERFORMANCE BC10/BC20 PIN FUNCTION I/O I I O O O I/O I/O I/O I I I I I I I I I I O O O I I/O I SIGNAL HV HVRTN OUT1 OUT2 OUT3 S1 S2 S3 HS1 HS2 HS3 120 REV GROUND Vcc REF IN FB TORQUE MOTOR I SSC FAULT OE CT 2Q DESCRIPTION Unregulated high current motor supply voltage Return line for the high motor current Half bridge output for driving motor coil Half bridge output for driving motor coil Half bridge output for driving motor coil Source of the N-rail FET in half bridge 1 Source of the N-rail FET in half bridge 2 Source of the N-rail FET in half bridge 3 Commutation sensor input 1 Commutation sensor input 2 Commutation sensor input 3 Sets commutation logic for 120 0 phasing Reverses direction when 2 quadrant PWM is used Signal ground Control circuit power Velocity/speed input Input for analog voltage proportional to velocity or speed Input for an analog voltage proportional to motor current Analog voltage proportional to motor current HCMOS level pulse for each sensor state change. HCMOS logic level output, a 0 indicates over temperature or over current condition. HCMOS 1 enables power FET operation The PWM frequency may be lowered by installing a capacitor between this output and ground. A logic 1 on this input enables 2 quadrant PWM PIN tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd tbd BC10/BC20U REV. 1 MAY 1999 (c) 1999 Apex Microtechnology Corp. Powered by ICminer.com Electronic-Library Service CopyRight 2003 |
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