文献翻译--一个灵活的led驱动汽车照明应用集成电路设计和实验特征-汽车设计(编辑修改稿)

文献翻译--一个灵活的led驱动汽车照明应用集成电路设计和实验特征-汽车设计(编辑修改稿)内容摘要：

的 whose functionality can be represented by a simple switch to the ground, is connected to a LED, in series with the car battery and another switch, controlled by the user through a button or 电池和另外一个开关连接，而用户通过一个按钮或 点火钥匙来控制它。 the ignition key. The basic scheme of the flexible LED driver is shown in Fig. 4, together with circuit details of the operational 这个灵活的发光二极管驱动基本方案以及电路详细的步骤和跨导放大器块如图四所示。 transconductance amplifier (OTA) block: the architecture 这个设计基于一个 is based on a voltage regulation loop inserted inside a linear loop providing the current control capability. 插入在一个线性循环的电压调节回路以提供当前的控制能力。 The voltage regulationloop forces the output on a reference voltage, Vref , when 电压调节回路控制输出的是参考电压当低压测主电源开关串联二极文献翻译 021309208 吴骁奕 管以提供反极性的容量给装置，是开启 了。 the low side main power switch (power MOS in Fig. 4), in series with the Diode that provides reverse polarity capability to the device, is turn ON. The LED driver has been integrated as hard macrocell LED驱动程序已经被集成在一个复杂的大容量的电池汽车控制单元集成电路中 in a plex automotive control unit IC, implemented in Austria micro systems (AMS) μ m CMOS technology. Fig 5 被用在。 从图 5中可以看出， shows the layout and the photo of the whole control unit IC, 布局和图片的整个控制单元集成在电路中，使得发光二极管驱动电子电路增强。 highlighting the LED driver circuit, and particularly the power MOS and its protection diode in Fig. 4, which occupy most of the LED driver area. 特别的在图四中的 MOS材料和二极管的保护，占绝了绝大部分的发光二极管驱动电路。 By regulating the output voltage on a reference level the state of the load and of the power switch can be easily detected. 通过调节输出电压在一个参考电平状态的负载和电源开关可以很容易地被检测到。 When the LED is ON (user switch and power switch in Fig. 3 当发光二极管打开，（用开关或者图 3的电源开关都可以使运转） both enabled), the regulation loop is activated and the output 调节回路是激活的，输出电压是控制为参考电压的。 Vo is forced on the reference voltage, Vref . If the user switch 同时强制发光二极管也关闭， 如果关闭开关 ,因此 发光 二极管也关闭 is OFF, and hence also the LED is OFF, the output pin of the driver is pulled down even when the power switch is OFF, by 文献翻译 021309208 吴骁奕 输出引线驱动被损坏甚至电源总开关也关掉，意味着编的程序没有应变能力。 means of a programmable resistive path to ground. That path is highly resistive to limit to very low value the current flowing through the LED. Finally, if the user switch is ON but the 这条道路的高电阻是用来限制非常低的电流来通过发光二极管，如果用户开关打开但电源开关关闭，那么输出电压将强迫输出为电源的额定电压。 power switch is forced OFF, then the output Vo is pulled up to the battery voltage, Vbatt , and the LED is OFF since no noticeable 发光二极管也将关闭直到没有明显的电流通过。 current is flowing. Summarizing, depending on the status of the switch devices in Fig. 3, the output voltage Vo can be pulled down to ground, or pulled up to Vbatt or forced to Vref . 根据不同开关设备的状态，如图 3所示 ,输出电压可以接地 ,或者强迫为电源的额定电压。 A parator can reveal the status of the driver and also potential overvoltage conditions by paring the output voltage to proper thresholds. Similarly overcurrent and overtemperature 一个比较器可以显示驱的状态和通过比较输出电压合适的阈值看出潜在的过压条件。 phenomena can be detected by paring the measured current and temperature values (through an onchip temperature sensor) with proper thresholds. All reference and threshold levels are 同样的过电流和超温现象是可以探测到的测量的电流和温度的值 (通过一个芯片上的温度传感器 )和适当的阈值比较。 internally generated by a digitalprogrammable bandgap unit. 所有的引用和阈值水平是由内部产生的数字通过可编程的带隙装置。 The measurements shown in this letter are obtained with a Vref 这篇文章中的测量值是通过额定电压获得，。 文献翻译 021309208 吴骁奕 of . The detected driver and load status are used by the internal logic as feedback signals to properly drive the power MOS in Fig. 4, acting as linear regulator or ON–OFF switch, 检测到的驱动和负载状态使用内部逻辑作为反馈信号正确驱动动力在图四中的金属氧化物半导体 ,是作为线性调节器或开关 and implementing advanced Soft Start or Current Slope Control techniques. 和实施先进的软启动或电流升降控制技术 The working mode of the LED driver, as linear regulator or ON–OFF switch, is determined by the user by proper configuring the Current level Iref in Fig. 4. The MOSMA mirrors a small 工作模式的 LED驱动 ,线性调节器或通断 开关 ,是由用户通过适当的配置在图 4按图四的电流是水平。 fraction of the power MOS output current and, through the HV and LowVoltage (LV) current mirrors in Fig. 4, MOSMA反射小部分功率从 MOS输出电流 ,如图四通过高压和低压 (LV)电流反射镜镜， pares it to the Iref current value (generated through onchip bandgap circuit). 比较其当前值 (通过芯片上的带隙电路生成 Iref)。 The HV PMOS current mirror is connected to the output voltage, which is up to 12V, while the LV PMOS current mirror is connected to Vdd = . The difference between Imir and 高压 PMOS的电流反射连接到输出电压提高到 12伏特 ,而低压 PMOS电流反射连接到 Vdd是 3伏特。 Iref drives the gate of MOS MB : if Imir is lower than Iref , then Imir和 Iref之间的在 MOS驱动上的区别是：如果 Imir低于 Irel，那么MB是关闭的 MB is OFF and the power MOS, driven by the OTA in Fig. 4, 并且 MOS的能量是由如图四中的 OTA驱动的，通过线性的电流调节器。 文献翻译 021309208 吴骁奕 acts as a linear current regulator. Otherwise, MB is ON and the 反之，如果 MB是打开的而电流环路控制开关关闭，那么 MOS MB将会被强制关闭。 current loop control switches to the OFF state the power MOS. The MOS MB can be forced back in OFF state, and hence the 同时强制电源 MOS起作用，如图四用来进行逻辑控制。 powerMOS reactived, by the control logic in Fig. 4. The control logic determines the times Ton and Toff when MB is OFF (., 这个控制逻辑决定什么时候开什么时候关分别当 MB关掉的时候（ MOS开着） power MOS is ON) or MB is ON。