Analog, Mixed-Signal and Power Management MC20XS4200 Dual 24 V, 20 mOhm High Side Switch Applications Overview The MC20XS4200 device is part of a 24 V high side switch product family with integrated • Automotive (12 V system) control, and a high number of protective and diagnostic functions. It is designed for truck, • Truck, Bus, industrial vehicles (24 V bus, and industrial applications. The low RDS(ON) channels (<20 mΩ) can control different load types; bulb lamps, solenoids, or DC motors. system) Control, device configuration, and diagnostics are performed through a 16-bit serial peripheral interface (SPI), allowing easy integration into existing applications. Both channels can be controlled individually by external or internal clock signals, or by direct inputs. Using the internal clock allows fully autonomous device operation. Programmable output voltage slew-rates (individually programmable) help improve electromagnetic compatibility (EMC) performance. To avoid shutting off the device due to inrush current, while still being able to closely track the load current, a dynamic over-current threshold profile is featured. Switching current of each channel can be sensed with a programmable sensing ratio. Whenever communication with the external microcontroller is lost, the device enters a Fail-safe operation mode, but remains operational, controllable, and protected. MC20XS4200 Simplified Application Diagram VDD VDD VPWR 20XS4200 I/O I/O SCLK CSB SI MCU I/O SO I/O I/O GND I/O A/D A/D VDD VPWR CLOCK FSB SCLK HS0 CSB SO RSTB SI HS1 IN0 IN1 CONF0 CONF1 FSOB SYNC CSNS GND LOAD M LOAD • Low voltage automotive lighting • Halogen bulbs • Light-emitting diodes (LEDs) • Low and High beam • Flashers • Low voltage industrial lighting Features • Two fully-protected 20 mΩ (@ 25 °C) high side switches • Up to 3.0 A steady state current perchannel • Separate bulb and DC motor latched over-current handling • Individually programmable internal/external PWM clock signals • Over-current, short-circuit, and overtemperature protection with programmable autoretry functions • Accurate temperature and current sensing • Open-load detection (channel in OFF & ON state), also for LED applications (7.0 mA typ.) • Normal operating range: 8.0 to 36 V, extended range: 6.0 to 58 V • 3.3 V and 5.0 V compatible 16-bit SPI port for device control, configuration and diagnostics at rates up to 8.0 MHz Benefits • Offer an intelligent high-side switch for 24 V truck and bus applications • Allow decentralized lighting management (autonomous operation) • Provide a high number of protective and diagnostic functions • Allow to drive bulb lamps (Tungsten filament), LED lights and DC-motors • Guarantee full functional and electrical compatibility between family members • Offer a 16-bit SPI interface for daisy chaining multiple devices • Allows multiple channel & device current sensing with only one precision resistor Questions • Does your application require high lifetime expectancy (over 30,000 hrs) or 1.5 million km? • Do you need to improve your application robustness with respect to wear out mechanisms? • Do you have a need to drive higher nominal and transient voltages? • Do you have a need to drive higher nominal load currents? • Does your system require Fail-safe operation? • Do you need pulse-width modulation (PWM) for load protection/control and efficiency? • Do you need a device that can report Diagnostics (opens, shorts, over current, over temperature, etc.)? • Do you have a need to reduce cost, size, weight and improve efficiency? Performance Parametric Typical Values # of Outputs 2 RDS(ON) @ 25 °C Dual 20 mΩ Operating Voltage 8 to 36 V Extended Operating Range 6 to 58 V Peak Current 38.5 A ESD ± 8.0 kV power I/Os Ambient Operating Temperature (TA) - 40 °C < TA < 125 °C Junction Operating Temperature (TJ ) - 40 °C < TJ < 150 °C ± 2.0 kV digital I/Os Protection Protection Auto Retry Status Reporting Detect Shut Down Short-circuit • • Over-temperature • • • • Over-current • • • • Over-voltage • Under-voltage • Open Load Detect • • • • • • • Orderable Part Numbers Part Number Temp Range (Ambient) Package -40 to +125 °C 23 PQFN MC20XS4200FK Note: Add R2 Suffix for Tape and Reel Development Tools 98ASA00428D 23 PIN PQFN (12 X12 mm) Part Number Description KIT20XS4200EVBE Evaluation Board - Contact Freescale Sales Documentation Document Number Title Description MC20XS4200 Dual 24 V, 20 mΩ High Side Switch Data Sheet SG1002 Analog, Mixed Signal and Power Management Selector Guide SG187 Automotive Selector Guide AN2467 Power Quad Flat No-Lead (PQFN) Package Application Note Application Note AN4473 Compact Thermal Model Application Note Application Note AN4474 EMC and Fast Transient Pulses Performances Application Note Application Note AN4516 IBIS Model Application Note Application Note Freescale: A Leader in Automotive Solutions Expanding on its more than 30-year heritage of automotive innovation and it’s highperformance products, Freescale’s solutions are designed with the right combination of high-performance capability, processing capacity and customizable software to help deliver smart, differentiated automotive solutions. With Analog, Mixed Signal, and Power parts, our vision is to offer a diverse and differentiated product portfolio to meet the expanding needs of the automotive, consumer and industrial segments. Freescale solutions offer ideal blends of functionality and intelligence designed to help our customers differentiate and win in highly competitive markets. For more information, visit freescale.com Freescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. All other product or service names are the property of their respective owners. © 2012 Freescale Semiconductor, Inc. Document Number: MC20XS4200FS REV 3.0