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L6258EX Fiches technique(PDF) 1 Page - STMicroelectronics |
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L6258EX Fiches technique(HTML) 1 Page - STMicroelectronics |
1 / 24 page 1/24 L6258E September 2004 1 FEATURES ■ ABLE TO DRIVE BOTH WINDINGS OF A BIPOLAR STEPPER MOTOR OR TWO DC MOTORS ■ OUTPUT CURRENT UP TO 1.2A EACH WINDING ■ WIDE VOLTAGE RANGE: 12V TO 40V ■ FOUR QUADRANT CURRENT CONTROL, IDEAL FOR MICROSTEPPING AND DC MOTOR CONTROL ■ PRECISION PWM CONTROL ■ NO NEED FOR RECIRCULATION DIODES ■ TTL/CMOS COMPATIBLE INPUTS ■ CROSS CONDUCTION PROTECTION ■ THERMAL SHUTDOW 2 DESCRIPTION L6258E is a dual full bridge for motor control applica- tions realized in BCD technology, with the capability of driving both windings of a bipolar stepper motor or bidirectionally control two DC motors. L6258E and a few external components form a com- plete control and drive circuit. It has high efficiency 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 mo- tors.The power stage is a dual DMOS full bridge ca- pable of sustaining up to 40V, and includes the diodes for current recirculation.The output current ca- pability is 1.2A per winding in continuous mode, with peak start-up current up to 1.5A. A thermal protection circuitry disables the outputs if the chip temperature exceeds the safe limits. NOT FOR NEW DESIGN PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER Figure 2. Block Diagram 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_IN2 EA_OUT2 GND EA_IN1 EA_OUT1 VCP2 VDD(5V) D96IN430D VR GEN INPUT & SENSE AMP CP CFREF CBOOT INPUT & SENSE AMP I3_1 I3_2 SENSE1B SENSE2B RC1 R1 1M R2 1M RC2 CC2 CC1 Rev. 7 Figure 1. Package Table 1. Order Codes Part Number Package L6258E (Replaced by L6258EX) PowerSO36 PowerSO36 |
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