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一种用于LED背光驱动的带隙基准源
资料介绍
依据带隙基准源的基本原理设计了一种用于LED背光驱动芯片的带隙基准源,与传统带隙基准源相比,设计的带隙基准源采用了无运放电路结构。该电路在基于0.5mm BCD工艺下完成设计,通过Hspice仿真表明,当温度在–40^＋125℃变化时,基准源输出电压在1.227 5-1.229 8 V之间变化,温漂系数仅为11.36×10^（–6）,基准源供电电压在6-8 V之间变化时,基准源输出电压相对变化量为0.85%,满足了设计要求。
Based on the basic theory of bandgap reference, a bandgap reference circuit for LED backlight driver was designed. Compared with the traditional ones, there is no amplifier in the present bandgap reference circuit. The circuit was designed on 0.5 ？m BCD process and simulated by Hspice. When the circuit is operated at 7.5 V power supply with the temperature range of -40-＋125 ℃, the variation of the bandgap reference output voltage is 2.3 mV, and the temperature drift coefficient is only 11.36×10^（-6）. When the power supply varies from 6 V to 8 V, the relative variation of the bandgap reference output voltage is only 0.85%. It meets the design requirements.
部分文件列表
| 文件名 | 大小 |
| 一种用于LED背光驱动的带隙基准源.pdf | 633K |
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