AtmelATA6823H橋驅(qū)動器汽車應(yīng)用方案

Atmel公司的ATA6823 H 橋驅(qū)動器集成電路采用0.8微米 BCD-on-SOI 技術(shù) (SMARTIS™),提供業(yè)界最高的集成水平，并包含 H 橋結(jié)構(gòu)中完整的微控制器控制的直流電機系統(tǒng)所需要的所有功能塊。該器件可在 1.5A 至 100A 以上的電流下工作，這種靈活性使 ATA6823 適合于眾多不同的應(yīng)用。

ATA6823 不僅僅是一種簡單的驅(qū)動器 IC。實際上，它是一種完整的系統(tǒng) IC，除驅(qū)動級外，還包括以下功能塊：為外置微控制器供電的管腳可調(diào)節(jié)式 5V/3.3V 穩(wěn)壓器；獨立于微控制器時鐘運行的可編程視窗看門狗 (window watchdog)；以及與 Atmel的獨立 LIN2.0 收發(fā)器 ATA6662 同樣的 LIN 收發(fā)器 IP。目前市場上還沒有其他設(shè)備能集所有這些功能于一身。ATA6823 的控制邏輯具有在正常情況下由微控制器提供的定時功能。這些定時功能可通過防止交叉?zhèn)鲗?dǎo)而保護外置晶體管。因此，采用 ATA6823 能夠減少系統(tǒng)設(shè)計人員的編程工作，因為只有兩個微控制器功能，即電機方向和 PWM 模式，需要進行編程。這有助于實現(xiàn)更快、更穩(wěn)定的設(shè)計，并縮短產(chǎn)品上市時間。

該 IC 還具有極低的電流消耗，在休眠模式 (sleep mode) 低于45微安，這降低了電池供電型系統(tǒng)的電流消耗。

與 Atmel 所有驅(qū)動器 IC 一樣，ATA6823 提供各種保護功能（欠壓、過壓、短路和超溫）。ATA6823 還能夠滿足嚴(yán)格的汽車條件要求（防止傳導(dǎo)干擾影響、EMC 和 ESD 保護），并能夠耐受 ISO/TR 7637 中說明的瞬變現(xiàn)象。

概述:
The ATA6823 is designed for several body and powertrain applications. The IC is
used to drive a continuous current motor in a full H-bridge configuration. An external
microcontroller controls the driving function of the IC by providing a PWM signal and a
direction signal and allows the use of the IC in a motor-control application. The PWM
control is performed by the low-side switch; the high-side switch is permanently on in
the driving phase. The VMODE configuration pin can be set to 5V or 3.3V mode (for
regulator and interface high level). The window watchdog has a programmable time,
programmable by choosing a certain value of the external watchdog resistor RWD,
internally trimmed to an accuracy of 10%. For communication a LIN transceiver 2.0 is
integrated.

主要特性:

PWM and Direction-controlled Driving of Four Externally-powered NMOS Transistors
A Programmable Dead Time Is Included to Avoid Peak Currents Within the H-bridge
Integrated Charge Pump to Provide Gate Voltages for High-side Drivers and to Supply
the Gate of the External Battery Reverse Protection NMOS
5V/3.3V Regulator and Current Limitation Function
Reset Derived From 5V/3.3V Regulator Output Voltage
Sleep Mode With Supply Current of Typically < 45 μA, Wake-up by Signal on Pins EN2
or on LIN Interface
A Programmable Window Watchdog
Battery Overvoltage Protection and Battery Undervoltage Management
Overtemperature Warning and Protection (Shutdown)
LIN 2.0 Compliant
3.3V/5V Regulator with Trimmed Band Gap
QFN32 Package

ATA6823方框圖:




ATA6823數(shù)據(jù)表:

http:///dyn/resources/prod_documents/doc4856.pdf


ATA6823 應(yīng)用電路板能驅(qū)動直流馬達,電源是8V-18V.

The ATA6823 application board allows the running of a DC motor. The supply voltage
is 8V to 18V, maximum power of the DC motor is limited by the external H-bridge
MOSFETs. No microcontroller is implemented on-board. It is possible to control the
motor either via an external microcontroller (with or without LIN bus), or directly (usingthe DIR and PWM pins).

主要性能:
Header Pins X1 to Connect to LIN Bus as well as Power Supply Output and EN2Wake-up
Microcontroller Connector Interface
4-mm Banana Plugs to Connect Power Supply BAT and GND
Included Power DC Motor On-board, Turn Direction Indicated by LEDs
Vias M+ and M– to Connect Optional DC Motor
Optional Connection of External Motor H-bridge
Push-button EN2 to Wake-up ATA6823
Jumper VMODE to Select VCC Output Voltage Level
Jumper RWD to Select Different WD Resistors
Shunt for DC Motor Current Measurement




ATA6823 應(yīng)用板電路圖

From http:///dyn/resources/prod_documents/doc4961.pdf