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L6258 Folha de dados(PDF) 1 Page - STMicroelectronics |
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L6258 Folha de dados(HTML) 1 Page - STMicroelectronics |
1 / 18 page L6258 PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER PRELIMINARY DATA ABLE TO DRIVE BOTH WINDINGS OF A BI- POLAR STEPPER MOTOR OR TWO DC MO- TORS OUTPUT CURRENT UP TO 1.5A EACH WINDING WIDE VOLTAGE RANGE: 12V TO 45V FOUR QUADRANT CURRENT CONTROL, IDEAL FOR MICROSTEPPING AND DC MO- TOR CONTROL PRECISION PWM CONTROL NO NEED FOR RECIRCULATION DIODES TTL/CMOS COMPATIBLE INPUTS CROSS CONDUCTION PROTECTION THERMAL SHUTDOWN DESCRIPTION L6258 is a dual full bridge for motor control appli- cations realized in BCD technology, with the ca- pability of driving both windings of a bipolar step- per motor or bidirectionally control two DC motors. L6258 and a few external components form a complete control and drive circuit. It has high effi- ciency phase shift chopping that allows a very low current ripple at the lowest current control levels, and makes this device ideal for steppers as well as for DC motors. The power stage is a dual DMOS full bridge capa- ble of sustaining up to 45V, and includes the di- odes for current recirculation. The output current capability is 1.5A per winding in continuous mode, with peak start-up current up to 2A. A thermal protection circuitry disables the outputs if the chip temperature exceeds the safe limits. This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. April 2000 ® DAC CHARGE PUMP VR (VDD/2) VCP1 PH_1 I0_1 I1_1 I2_1 VREF1 TRIANGLE GENERATOR TRI_CAP ERROR AMP + - VR + - + - C C POWER BRIDGE 1 TRI_0 TRI_180 TRI_180 TRI_0 DAC PH_2 I0_2 I1_2 I2_2 VREF1 ERROR AMP + - VR + - + - C C POWER BRIDGE 2 TRI_0 TRI_180 THERMAL PROT. OUT1A OUT1B Rs SENSE1A VBOOT DISABLE VS OUT2A OUT2B SENSE2A Rs VS EA_IN1 EA_OUT1 GND EA_IN2 EA_OUT2 VCP2 VDD(5V) D96IN430D VR GEN INPUT & SENSE AMP CP CFREF CBOOT INPUT & SENSE AMP I3_1 I3_2 SENSE1B SENSE2B RC2 RC1 CC1 CC2 BLOCK DIAGRAM ORDERING NUMBER: L6258 PowerSO36 1/18 |
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