L6226Q STMicroelectronics

L6226Q DMOS dual full bridge driver Features Operating supply voltage from 8 to 52 V 2.8 A output peak current (1.4 A DC) R 0.73 typ. value T = 25 C DS(on) J Operating frequency up to 100 kHz Programmable high side overcurrent detection and protection Description Diagnostic output The L6226Q is a DMOS dual full bridge designed Paralleled operation for motor control applications, realized in BCDmultipower technology, which combines Cross conduction protection isolated DMOS power transistors with CMOS and Thermal shutdown bipolar circuits on the same chip. Available in Under voltage lockout QFN32 5x5 package, the L6226Q features thermal shutdown and a non-dissipative Integrated fast free wheeling diodes overcurrent detection on the high side power MOSFETs plus a diagnostic output that can be Applications easily used to implement the overcurrent protection. Bipolar stepper motor Dual or quad DC motor Figure 1. Block diagram VBOOT V BOOT VS A V V BOOT BOOT CHARGE VCP PUMP PROGCL A OVER OCD OCD CURRENT A A DETECTION OUT1 A OUT2 A 10V 10V THERMAL PROTECTION EN GATE A LOGIC IN1 A SENSE A IN2 A 10V VOLTAGE REGULATOR 5V BRIDGE A OCD B OVER OCD CURRENT B DETECTION VS B PROGCL B OUT1 B OUT2 GATE B EN B LOGIC SENSE B IN1 B IN2 BRIDGE B B D99IN1088A August 2010 Doc ID 14335 Rev 5 1/29 www.st.com 29Contents L6226Q 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 10 4.1 Power stages and charge pump 10 4.2 Logic inputs . 11 4.3 Truth table . 12 4.4 Non-dissipative overcurrent detection and protection . 12 4.5 Thermal protection 16 5 Application information . 17 6 Paralleled operation 19 7 Output current capability and IC power dissipation 23 8 Thermal management . 24 9 Package mechanical data 25 10 Order codes . 27 11 Revision history . 28 2/29 Doc ID 14335 Rev 5