L6228Q STMicroelectronics

L6228Q DMOS driver for bipolar stepper motor Datasheet production data 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 VFQFPN32 5 mm x 5 mm Operating frequency up to 100 kHz Non dissipative overcurrent protection Description Dual independent constant t PWM current OFF controllers The L6228Q is a DMOS fully integrated stepper motor driver with non-dissipative overcurrent Fast/slow decay mode selection protection, realized in BCD multipower Fast decay quasi-synchronous rectification technology, which combines isolated DMOS Decoding logic for stepper motor full and half- power transistors with CMOS and bipolar circuits step drive on the same chip. The device includes all the circuitry needed to drive a two-phase bipolar Cross conduction protection stepper motor including: a dual DMOS full-bridge, Thermal shutdown the constant off-time PWM current controller that Undervoltage lockout performs the chopping regulation and the phase sequence generator, that generates the stepping Integrated fast free wheeling diodes sequence. Available in VFQFPN32 5 mm x 5 mm package, the L6228Q features a non-dissipative Applications overcurrent protection on the high-side power MOSFETs and thermal shutdown. Bipolar stepper motor Figure 1. Block diagram VBOOT V BOOT VS A V V BOOT BOOT CHARGE VCP PUMP OCD A OVER CURRENT OCD B DETECTION OUT1 A OUT2 A 10V 10V THERMAL PROTECTION EN GATE LOGIC CONTROL SENSE A HALF/FULL PWM CLOCK STEPPING + ONE SHOT MASKING SEQUENCE MONOSTABLE TIME VREF RESET SENSE - A GENERATION COMPARATOR CW/CCW RC A BRIDGE A VS B OVER CURRENT OUT1 VOLTAGE B DETECTION REGULATOR OUT2B SENSE B GATE VREF LOGIC B 10V 5V BRIDGE B RC B D01IN1225 January 2013 Doc ID 14321 Rev 5 1/32 This is information on a product in full production. www.st.com 32Contents L6228Q Contents 1 Electrical data 3 1.1 Absolute maximum ratings . 3 1.2 Recommended operating conditions . 3 1.3 Thermal data . 4 2 Pin connection 5 3 Electrical characteristics . 7 4 Circuit description 11 4.1 Power stages and charge pump 11 4.2 Logic inputs . 12 4.3 PWM current control . 13 4.4 Decay modes 16 4.5 Stepping sequence generation . 17 4.6 Half-step mode . 17 4.7 Normal drive mode (full-step two-phase-on) 18 4.8 Wave drive mode (full-step one-phase-on) . 18 4.9 Non-dissipative overcurrent protection . 19 4.10 Thermal protection 22 5 Application information . 23 6 Output current capability and IC power dissipation 25 7 Thermal management . 27 8 Package mechanical data 28 9 Ordering information . 30 10 Revision history . 31 2/32 Doc ID 14321 Rev 5