L6208QTR STMicroelectronics

L6208Q DMOS driver for bipolar stepper motor Datasheet - production data Description The L6208Q device is a DMOS fully integrated stepper motor driver with non-dissipative overcurrent protection, realized in BCDmultipower technology, which combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. The device includes all the circuitry needed to drive a two-phase bipolar PP stepper motor including: a dual DMOS full bridge, the constant OFF time PWM current controller that performs the chopping regulation, and the phase sequence generator that generates the Features stepping sequence. Available in a VFQFPN48 7 x 7 mm package, the L6208Q features a non- Operating supply voltage from 8 to 52 V dissipative overcurrent protection on the high-side 5.6 A output peak current Power MOSFETs and thermal shutdown. R 0.3 typ. value at T = 25 C DS(on) j Operating frequency up to 100 kHz Non-dissipative overcurrent protection Dual independent constant t PWM current OFF controllers Fast/slow decay synchronous rectification Fast decay quasi-synchronous rectification Decoding logic for stepper motor full and half step drive Cross conduction protection Thermal shutdown Undervoltage lockout Integrated fast freewheeling diodes Application Bipolar stepper motor March 2017 DocID018710 Rev 4 1/34 This is information on a product in full production. www.st.com 9)4)31 Contents L6208Q Contents 1 Block diagram 4 2 Electrical data 5 2.1 Absolute maximum ratings . 5 2.2 Recommended operating conditions . 5 3 Pin connection 6 4 Electrical characteristics . 8 5 Circuit description 12 5.1 Power stages and charge pump 12 5.2 Logic inputs . 13 5.3 PWM current control . 14 5.4 Decay mode . 18 5.5 Stepping sequence generation . 19 5.6 Half step mode . 19 5.7 Normal drive mode (full step two-phase-on) 19 5.8 Wave drive mode (full step one-phase-on) . 19 5.9 Non-dissipative overcurrent detection and protection . 20 5.10 Thermal protection 23 6 Application information . 24 7 Output current capability and IC power dissipation 26 8 Thermal management . 28 9 Electrical characteristic curves . 29 10 Package information 30 10.1 VFQFPN48 (7 x 7 x 1.0 mm) package information . 30 2/34 DocID018710 Rev 4