L6235N STMicroelectronics

L6235 DMOS driver for 3-phase brushless DC motor Datasheet - production data 60 and 120 hall effect decoding logic Brake function Tachometer output for speed loop Cross conduction protection Thermal shutdown Undervoltage lockout Integrated fast freewheeling diodes 3 2 RZHU6 Description The L6235 device is a DMOS fully integrated 3- phase motor driver with overcurrent protection. Realized in BCD technology, the device combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. The device includes all the circuitry needed to drive a 3-phase BLDC motor including: a 3-phase 62 DMOS bridge, a constant off time PWM current controller and the decoding logic for single ended hall sensors that generates the required sequence for the power stage. HULQ PEHU J QX 2UG V ZHU / ,3 1 3R Available in PowerSO36 and SO24 (20 + 2 + 2) RZHU / 62 3 3 packages, the L6235 device features a non- / 62 dissipative overcurrent protection on the high-side power MOSFETs and thermal shutdown. Features Operating supply voltage from 8 to 52 V 5.6 A output peak current (2.8 A DC) R 0.3 typ. value at T = 25 C DS(ON) j Operating frequency up to 100 KHz Non-dissipative overcurrent detection and protection Diagnostic output Constant t PWM current controller OFF Slow decay synchr. rectification October 2018 DocID7618 Rev 4 1/34 This is information on a product in full production. www.st.comContents L6235 Contents 1 Block diagram 3 2 Maximum ratings 4 3 Pin connections . 6 4 Electrical characteristics . 8 5 Circuit description 11 5.1 Power stages and charge pump .11 5.2 Logic inputs . 12 6 PWM current control 13 7 Slow decay mode 17 8 Decoding logic . 18 9 Tachometer . 20 10 Non-dissipative overcurrent detection and protection 22 11 Application information . 25 11.1 Output current capability and IC power dissipation . 26 11.2 Thermal management . 27 12 Package information 30 12.1 PowerSO36 package information . 30 12.2 SO24 package information 32 13 Revision history . 33 2/34 DocID7618 Rev 4