標題: LDMOS Channel Thermometer Based on a Thermal Resistance Sensor for Balancing Temperature in Monolithic Power ICs
作者: Lin, Tingyou
Ho, Yingchieh
Su, Chauchin
電子工程學系及電子研究所
電信工程研究所
Department of Electronics Engineering and Institute of Electronics
Institute of Communications Engineering
關鍵字: monolithic power ICs;temperature sensor;oscillator;thermal balancing;power metal-oxide-semiconductor (MOS);calibration
公開日期: 1-Jun-2017
摘要: This paper presents a method of thermal balancing for monolithic power integrated circuits (ICs). An on-chip temperature monitoring sensor that consists of a poly resistor strip in each of multiple parallel MOSFET banks is developed. A temperature-to-frequency converter (TFC) is proposed to quantize on-chip temperature. A pulse-width-modulation (PWM) methodology is developed to balance the channel temperature based on the quantization. The modulated PWM pulses control the hottest of metal-oxide-semiconductor field-effect transistor (MOSFET) bank to reduce its power dissipation and heat generation. A test chip with eight parallel MOSFET banks is fabricated in TSMC 0.25 mu m HV BCD processes, and total area is 900 x 914 mu m(2). The maximal temperature variation among the eight banks can reduce to 2.8 degrees C by the proposed thermal balancing system from 9.5 degrees C with 1.5 W dissipation. As a result, our proposed system improves the lifetime of a power MOSFET by 20%.
URI: http://dx.doi.org/10.3390/s17061397
http://hdl.handle.net/11536/145734
ISSN: 1424-8220
DOI: 10.3390/s17061397
期刊: SENSORS
Volume: 17
Issue: 6
起始頁: 0
結束頁: 0
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