Excessively high temperature can greatly increase the thermal noise of TDI CCD, which will reduce the camera's image quality significantly, so thermal control methods must be taken to decrease the temperature of TDI CCD focal plane. One high-speed TDI CCD circuit, which had a difficulty in heat dissipation because of high power density, was discussed in detail. Limited by the mass and power consumption, traditional radiant cooling panel method couldn't be used. Based on the stronger temperature adaptability, the method of reducing the temperature of camera and using the large heat capacity character of electricity box was taken on the focal plane. Through the camera's thermal balance test, thermal control effect of the method was verified, and the optimization scheme was presented. The results show that, under high temperature cases, the maximum temperature of TDI CCD is 30℃ , about 10℃ lower than nothing thermal control method was taken, and the method can satisfy TDI CCD's requirements well.%受到质量和功耗的限制,某相机焦平面组件热控不能采用传统辐射冷板与主动温度补偿结合的方法.基于相机宽温适应性的特点,提出了降低相机工作温度与大热容焦面电箱结构储热相结合的被动热控方法,通过相机热平衡试验在热真空罐中进行了验证,并结合试验数据探讨了如何通过被动热控方法获取更低TDI CCD工作温度的问题,给出了优化方案.试验结果表明:高温试验工况下,在相机要求的工作时间内,TDI CCD器件的最高温度为30℃,比不采取热控措施时降低了10℃,焦面组件热设计合理,满足工作需要.
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