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L6474PD Fiches technique(PDF) 1 Page - STMicroelectronics |
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L6474PD Fiches technique(HTML) 1 Page - STMicroelectronics |
1 / 51 page December 2011 Doc ID 022529 Rev 2 1/51 51 L6474 easySPIN – fully integrated microstepping motor driver Features ■ Operating voltage: 8 - 45 V ■ 7.0 A output peak current (3.0 A r.m.s.) ■ Low RDSon power MOSFETS ■ Programmable power MOS slew-rate ■ Up to 1/16 microstepping ■ Current control with adaptive decay ■ Non dissipative current sensing ■ SPI interface ■ Low quiescent and standby currents ■ Programmable non dissipative overcurrent protection on all power MOS ■ Two-level overtemperature protection Application ■ Bipolar stepper motor Description The L6474, realized in analog mixed signal technology, integrates a dual low RDSon DMOS full bridge with all power switches equipped with an accurate on-chip current sensing circuitry suitable for non dissipative current control and overcurrent protections. Thanks to a new current control, a 1/16 microstepping is achieved through an adaptive decay mode which outperforms traditional implementations. All data registers, including those used to set analogue values (i.e. current control value, current protection trip point, dead time, etc.) are sent through a standard 5 Mbit/s SPI. A very rich set of protections (thermal, low bus voltage, overcurrent) makes the L6474 “bullet proof” as required by the most demanding motor control applications. HTSSOP28 POWERSO36 Table 1. Device summary Order codes Package Packing L6474H HTSSOP28 Tube L6474HTR HTSSOP28 Tape and reel L6474PD POWERSO36 Tube L6474PDTR POWERSO36 Tape and reel www.st.com |
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