L6229Q STMicroelectronics

L6229Q DMOS driver for three-phase brushless DC motor Features Operating supply voltage from 8 to 52 V 2.8 A output peak current (1.4 A RMS) R 0.73 typ. value T = 25 C DS(on) J Operating frequency up to 100 kHz VFQFPN32 5 mm x 5 mm Non dissipative overcurrent detection and protection Description Diagnostic output Constant t PWM current controller The L6229Q is a DMOS fully integrated three- OFF phase motor driver with overcurrent protection. Slow decay synchronous rectification Realized in BCDmultipower technology, the 60 and 120 hall effect decoding logic device combines isolated DMOS power Brake function transistors with CMOS and bipolar circuits on the Cross conduction protection same chip. Thermal shutdown The device includes all the circuitry needed to Under voltage lockout drive a three-phase BLDC motor including: a three-phase DMOS bridge, a constant off time Integrated fast free wheeling diodes PWM current controller and the decoding logic for single ended hall sensors that generates the required sequence for the power stage. Available in VFQFPN-32 5 x 5 package, the L6229Q features a non-dissipative overcurrent protection on the high side power MOSFETs and thermal shutdown. Table 1. Device summary Order codes Package Packaging L6229Q Tube VFQFPN32 5x5x1.0 mm L6229QTR Tape and reel August 2010 Doc ID 15209 Rev 3 1/28 www.st.com 28Contents L6229Q Contents 1 Block diagram 3 2 Electrical data 4 2.1 Absolute maximum ratings . 4 2.2 Recommended operating conditions . 4 2.3 Thermal data . 5 3 Pin connection 6 4 Electrical characteristics . 8 5 Circuit description 11 5.1 Power stages and charge pump 11 5.2 Logic inputs . 12 5.3 PWM current control . 13 5.4 Slow decay mode . 16 5.5 Decoding logic . 16 5.6 Tacho 18 5.7 Non-dissipative overcurrent detection and protection . 20 6 Application information . 22 6.1 Output current capability and ic power dissipation 23 6.2 Thermal management . 24 7 Package mechanical data 25 8 Revision history . 27 2/28 Doc ID 15209 Rev 3