EVAL6228QR STMicroelectronics

EVAL6228QR Demonstration board mounting the L6228Q dual full-bridge driver Data brief Features Operating supply voltage from 8 to 52 V 2.8 A output peak current (1.4 A ) r.m.s. R 0.73 typ. value 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 mode selection Fast decay quasi-synchronous rectification Decoding logic for stepper motor full and half- step drive Cross conduction protection Thermal shutdown Undervoltage lockout Integrated fast free wheeling diodes Description The L6228Q is a DMOS fully integrated stepper motor driver, realized in BCD multipower technology. The L6228Q includes the circuitry to drive a two- phase bipolar stepper motor: a dual DMOS full- bridge, the constant off-time, the PWM current controller performing the chopping regulation and the phase sequence generator, which generates the stepping sequence. The device features a non-dissipative overcurrent protection on the high-side power MOSFETs and thermal shutdown. January 2013 Doc ID 024139 Rev 1 1/8 For further information contact your local STMicroelectronics sales office. www.st.com 8Board description EVAL6228QR 1 Board description Table 1. EVAL6228QR electrical specifications (recommended values) Parameter Value Supply voltage range (VS) 8 V to 52 V DC Output current rating (OUTx) up to 1.4 A r.m.s. Switching frequency up to 100 kHz Voltage reference range (REFA, REFB) 0 to + 5 V Input and enable voltage range 0 to + 5 V o L6228Q thermal resistance junction-to-ambient 42 C/W Figure 1. EVAL6228QR demonstration board description CW/CCW REFA CLOCK RESET PGND VS OUT1A OUT2A SGND OUT2B OUT1B HALF/FULL CONTROL DIAG EN REFB AM16544v1 2/8 Doc ID 024139 Rev 1