原标题：Freescale MC33816汽车电磁阀精密控制解决方案

　　freescale公司的MC33816是用于汽车发动机喷油器和电磁阀门控制的混合信号集成电路, 提供有成本效益灵活和智能的高边和低边MOSFET栅极驱动器,主要用于汽车(12V),卡车和工业(24V)动力总成,汽油和柴油直喷机和传动装置.本文介绍了MC33816主要特性,功能框图和简化框图,典型应用电路,以及评估板KIT33816AEEVM主要特性和建立框图,电路图,材料清单与PCB元件布局图.

　　The MC33816 is a mixed signal IC for engine injector and electrical valve control, which provides a cost effective, flexible, and smart, high-side and low-side MOSFET gate drivers. The device includes both individual charge pump outputs for each high-side pre-driver and high-voltage DC-DC converter pre-driver. Gate drive, diagnosis, and protection against external faults, are managed through four independent and concurrent digital microcores using an extensive set of 93 microcode instructions. Each of the two logic channels, comprised of two microcores, has its own Code RAM and Data RAM. The internal microcode is protected against theft via encryption and corruption via check sums. All functions are designed to minimize the number of external components required.

　　MC33816主要特性:

　　High-side and Low-side Pre-drivers

　　•Five high-side pre-drivers for logic level N-channel MOSFETs using four programmable slew rates

　　•Six low-side pre-drivers for logic level N-channel MOSFETs using four programmable slew rates

　　•Integrated bootstrap circuitry for each high-side pre-driver

　　•Integrated charge pump circuitry for each high-side pre-driver with 100% duty cycle capability

　　DC-DC Converter

　　•One low-side pre-driver, for a logic level N-channel MOSFET, can be optionally dedicated to providing a boost DC-DC converter with four programmable slew rates

　　•Boost voltage monitoring (with integrated feedback)

　　Current Measurement and Diagnostic

　　•Four independent current measurement blocks, including A/D converters with programmable gain, which are based on 8-bit D/A converters

　　•One current measurement (channel 4) is optionally configurable to support DC-DC converter with overload detection

　　•Five high-side and six low-side pre-drivers with independent VDS monitoring (eight programmable values) for fault protection and diagnostics

　　•Integrated load biasing to VBATT/2 for diagnosis (on all high-side sources and all low-side drains)

　　•Capable of detecting missing ground connections

　　Power Supplies and Monitoring

　　•Integrated 7.0 V linear regulator (VCCP) for HS/LS power supply (optionally externally supplied for 24 V battery system), with undervoltage monitoring

　　•Integrated 2.5 V linear regulator (VCC2P5) for digital core supply based on VCC5 input supply, with undervoltage monitoring

　　•External 5.0 V supply (VCC5) with under/overvoltage monitoring

　　•Temperature monitoring

　　•Selectable VCCIO external supply (5.0 V or 3.3 V) for digital I/O

　　Digital Block

　　•Four digital microcores, each with their own ALU, and full access to the system crossbar switch

　　•Two memory banks: 1024 x 16-bit of code RAM with built-in error detection and 64 x 16-bit of data RAM

　　•A system-wide crossbar switch for analog resources configuration

　　•Memory BIST activated by the SPI, with pass/fail status

　　PLL and Backup Clock

　　•12 to 24 MHz PLL internal system clock based on 1.0 MHz input clock

　　•Loss of clock protection by means of internal backup 1.0 MHz clock

　　Control Interface

　　•16-bit slave SPI up to 10 MHz – two protocols – programmable slew rate

　　•13 general purpose digital IOs – configurable through registers and microcode

　　•Direct pre-driver inhibition input

　　•Device reset input

　　•Hardware interrupt output

　　Miscellaneous

　　•Built-in encryption for microcode protection

　　•External digital I/O able to sustain voltages up to 18 V

　　•High ESD performance

　　•ESD strategy optimized for ESD System Level Stress (“System-efficient ESD Design”)

　　•High ESD holding voltage (>80 V)

　　•AEC-Q100 Rev G compliant

　　•Heavy duty compliant

　　•Enhanced analog testability based on JTAG

　　MC33816应用:

　　•Automotive (12 V), Truck and Industrial (24 V) Powertrain

　　•Diesel and Gasoline Direct Injection

　　•Transmission

　　图1. MC33816功能框图

　　图2.MC33816简化框图

　　图3.MC33816简化应用框图

　　评估板KIT33816AEEVM

　　The KIT33816AEEVM Evaluation Board (EVB) is an easy-to-use circuit board that allows you to exercise all the functions of the MC33816 direct injection pre-driver circuit. A PC communicates to the EVB through a USB/SPI dongle (KITUSBSPIDGLEVME) connected to the PC’s USB port. The Freescale SPIGen (version 7.0 and above) program provides the user interface to the MC33816 SPI port and allows the user to program the Code RAM and Data Registers, send commands to the IC and receive status from the IC.

　　评估板KIT33816AEEVM主要特性:

　　A MC33816 Direct Injection Pre-driver Integrated Circuit

　　A USB-to-SPI dongle interface

　　Power-conditioning circuitry

　　External MOSFETs

　　A +5.0 volt regulator supplies all +5.0 volt VDD power required by the EVB

　　A +12 V VBAT supply provides the power to the two internal voltage regulators, VCCP and VCCP2.5.

　　图4.评估板KIT33816AEEVM外形图

　　图5.评估板KIT33816AEEVM建立框图

　　评估板KIT33816AEEVM材料清单: