L99MD01 Octal half-bridge driver with SPI control for automotive application Features 8 half bridges R =typ. 0.9 (HS), 0.64 (LS) ON T =25C j Current limit of each output at min. 0.8 A Intrinsic DC/DC step up converter driving an * 3*&)7 external MOSFET PowerSSO-36 PWM mode option for all half bridges for hold current Internal PWM generation Description Two current monitor outputs The L99MD01 is an octal half-bridge driver for SPI interface for data communication automotive applications. Temperature warning The device is intended to drive DC and/or stepper All outputs overtemperature protected motors. Using the boost converter its possible to drive 4 stepper motors simultaneously. Without All outputs short circuit protected boost converter the system is able to run 3 V supply voltage 3.0 to 5.3 V CC stepper motors in sequential mode or 2 stepper Very low current consumption in standby mode motors simultaneously. The octal half bridge typ. 5 A configuration allows also to drive 4 DC-motors simultaneously and 7 DC-motors sequentially. V operating range compliant: 6 V 18 V S The integrated 24 bit standard Serial Peripheral Interface (SPI) controls all outputs and provides Applications diagnostic information: normal operation, open- Stepper motor driver and / or DC load in on-state, overcurrent, temperature warning and overtemperature. Intended to drive HVAC flaps Table 1. Device summary Order codes Package Tube Tape and reel PowerSSO-36 L99MD01XP L99MD01XPTR September 2013 Doc ID 17242 Rev 6 1/54 www.st.com 1Contents L99MD01 Contents 1 Block diagram 6 2 Detailed description . 7 2.1 Power supply: V . 7 CC 2.2 Power supply: V , V . 7 SA SB 2.3 Standby mode 7 2.4 PWM mode . 7 2.5 SMPS Switched Mode Power Supply 8 2.6 Current monitor . 8 2.7 Inductive loads 8 2.8 Diagnostic functions 8 2.9 Temperature warning and thermal shutdown . 9 2.10 V , V , V , V monitoring . 9 S S2 SA SB 2.11 Open-load detection . 9 2.12 Overload detection 10 2.13 Cross-current protection 10 3 Pin definitions and functions . 11 4 Electrical specifications . 13 4.1 Absolute maximum ratings 13 4.2 ESD protection . 13 4.3 Thermal data 14 4.4 Electrical characteristics 14 4.4.1 SPI electrical characteristics . 19 4.4.2 SPI timing parameter definition . 21 5 Functional description of the SPI . 22 5.1 Signal description . 22 5.1.1 Serial clock (SCK) . 22 5.1.2 Serial data input (SDI) 22 5.2 SPI communication flow 24 2/54 Doc ID 17242 Rev 6