L9347LF STMicroelectronics

L9347 Intelligent quad (2x5A/2x2.5A) low-side switch Features Quad low-side switch 2 x 5A designed as conventional switch 2 x 2.5A designed as switched current- regulator Low ON resistance 2 x 0.2 , 2 x 0.35 (typ.) Power SO-36 package with integrated cooling area Integrated free wheeling and clamping Z PowerSO-36 Bare Die diodes Output slope control Short circuit protection Selective overtemperature shutdown Open load detection Description Ground and supply loss detection The L9347 is an integrated quad low-side power External clock control switch to drive inductive loads like valves used in Recirculation control ABS systems. Two of the four channels are Regulator drift detection current regulators with current range from 250mA to 2.25A and an accuracy of 10%. Regulator error control Regulator resolution 5mA All channels are protected against fail functions. They are monitored by a status output. Status monitoring Status push-pull stages Electrostatic discharge (ESD) protection Table 1. Device summary Part number Package Packing L9347LF PowerSO-36 Tray L9347LF-TR PowerSO-36 Tape and reel L9347DIE1 Bare die Bare die September 2013 Rev 3 1/29 www.st.com 1Contents L9347 Contents 1 Block diagram and pin connections 5 2 Electrical specifications 8 3 Functional Description 13 3.1 Overview . 13 3.2 Input circuits . 13 3.3 Output stages (not regulated) Channel 1 and 2 13 3.4 Current regulator stages Channel 3 and 4 13 3.5 Protective circuits . 15 3.6 Error detection . 15 3.7 Drift detection (regulated channels only) . 17 3.8 Other test modes . 17 3.9 Diagnostic table 18 4 Timing diagrams . 20 4.1 Non regulated channels 20 4.2 Regulated channels . 23 5 Package information 27 6 Revision history . 28 2/29