Name
Title | ||
|---|---|---|
A 90–240 MHz Hysteretic Controlled DC-DC Buck Converter With Digital Phase Locked Loop Synchronization |
Abstract | ||
|---|---|---|
This paper reports a digital phase locked loop (D-PLL) based frequency locking technique for high frequency hysteretic controlled dc-dc buck converters. The proposed converter achieves constant operating frequency over a wide output voltage range, eliminating the dependence of switching frequency on duty cycle or voltage conversion range. The D-PLL is programmable over a wide range of parameters and can be synchronized to a clock reference to ensure proper frequency lock and switching operation outside undesirable power supply resonance bands. The stability and loop dynamics of the proposed converter is analyzed using an analog equivalent PLL behavioral model which describes the dc-dc converter as a voltage-controlled oscillator (VCO). We demonstrate a 90-240 MHz single phase converter with fast hysteretic control and output conversion range of 33%-80%. The converter achieves an efficiency of 80% at 180 MHz, a load response of 40 ns for a 120 mA current step and a peak-to-peak ripple less than 25 mV. The circuit was implemented in 130 nm digital CMOS process. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/JSSC.2011.2139550 | J. Solid-State Circuits |
Keywords | Field | DocType |
clock reference,voltage-controlled oscillator,voltage-controlled oscillators,buck,digital cmos process,voltage conversion range,digital phase locked loops,frequency locking technique,dc-dc power convertors,frequency 90 mhz to 240 mhz,size 130 nm,high frequency hysteretic controlled dc-dc buck converter,d-pll synchronization,power supply resonance band,digital pll,current 120 ma,vco,stability dynamics,time 40 ns,digital phase locked loop synchronization,cmos digital integrated circuits,loop dynamics,efficiency 80 percent,constant frequency,analog equivalent pll behavioral model,cmos,hysteretic,synchronisation,switching frequency,dc-dc converter,behavior modeling,buck converter,high frequency,frequency control,voltage controlled oscillator,phase lock loop,duty cycle,synchronization,phase locked loops | Boost converter,Phase-locked loop,Computer science,Control theory,Ćuk converter,Voltage-controlled oscillator,Electronic engineering,Automatic frequency control,Time-to-digital converter,Buck converter,Buck–boost converter | Journal |
Volume | Issue | ISSN |
46 | 9 | 0018-9200 |
Citations | PageRank | References |
12 | 1.28 | 11 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Pengfei Li | 1 | 82 | 11.81 |
| Deepak Bhatia | 2 | 14 | 2.62 |
| Lin Xue | 3 | 32 | 6.52 |
| Rizwan Bashirullah | 4 | 200 | 42.61 |