Low-loss rectifier by self-driven MOSFET with gate drive voltage control circuit

Kagawa, Yusuke; Furukawa, Akihiko; Takeshita, M.; Iwata, Akihiko; Suga, Ikuro; Yamakawa, Satoshi; Inoue, M.

doi:10.1109/ispsd.2009.5158003

Cited by 4 publications

(6 citation statements)

References 3 publications

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“…There are several approaches to realize the control unit, e.g. by detecting the voltage polarity with [16,21] and without current mirror [19,23], or by detecting the current with current mirror and transimpedance amplifier [18]. An advantage of an additional current mirror is the reduction of the reverse or blocking voltage at the input of the detecting unit.…”

Section: B Controlmentioning

confidence: 99%

“…5) is the combination of current and voltage detection. Similar to [16], the current is detected by a sense transistor Q2 and an additional sense resistor RSENSE. The voltage drop VSENSE across the resistor is given by…”

Section: B Controlmentioning

confidence: 99%

“…There is an approach that uses the input network of sense transistor and resistor of the control and then increases the voltage VSENSE by a charge pump to the desired supply voltage. The supply voltage would be available after a certain time [16]. This possibility is very complex due to the low voltage (VSENSE < VF).…”

Section: Voltage Supply Generationmentioning

confidence: 99%

“…However, this approach still requires a power supply for each active or ideal diode with an additional bulk capacitor [5]. Similar approaches with integrated voltage supply for lower breakdown voltages are demonstrated in [10,16]. In addition, there are numerous patents [17][18][19][20][21][22][23] for active diodes in different voltage classes, which mostly consist of the three parts: power switch, control, and voltage supply generation.…”

Section: Introductionmentioning

confidence: 99%

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GaN Active Rectifier Diode

Basler

Reiner

Moench

et al. 2022

IEEE Open J. Power Electron.

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Active or synchronous rectification is used today to further increase the efficiency of mass-market power supplies by eliminating the turn-on voltage of rectifier diodes, thus reducing conduction losses. However, the active rectification is usually realized by two devices: a power MOSFET and a control circuit to imitate an ideal diode behavior. This paper presents a GaN active rectifier diode consisting of a 600 V power transistor, a control circuit with gate driver, and a supply generation, all monolithically realized in a GaN power integrated circuit (IC). This enables a true two-terminal device that can directly replace a rectifier diode. In order to evaluate the proposed conduction loss reduction by replacing a rectifier diode by an active diode, the theoretical limits at circuit level and at semiconductor level are analyzed. The GaN active rectifier diode is demonstrated in a half-wave rectification (110/230 VAC, 50/60 Hz) up to a forward current of 6 A. A single-device realization of low-loss GaN active rectifier diodes is more cost-efficient than a multi-chip or package-integrated solution.

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Section: B Controlmentioning

confidence: 99%

Section: B Controlmentioning

confidence: 99%

Section: Voltage Supply Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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GaN Active Rectifier Diode

Basler

Reiner

Moench

et al. 2022

IEEE Open J. Power Electron.

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“…When reverse voltage is lower than the Vcc, the CS is a boost converter. When the Vcc is generated from forward voltage drop, the CS is a charge pump converter [8]. To generate the Vcc in this case, the forward voltage can be decreased up to 0.4[V] or more.…”

Section: A Control Power Supply Circuit (Cs)mentioning

confidence: 99%

Low-loss rectification circuit with no external drive input

Sakai

Takeshita

Suga

2009

2009 35th Annual Conference of IEEE Industrial Electronics

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We have developed the new low-loss rectification circuit that needed neither external signals nor power supplies for driving. This circuit creates the control power supply for the circuit operation from reverse voltage. The direction of the current that flows in this circuit is detected from the voltage between the MOSFET drain and source. The current is rectified by driving MOSFETs according to this detection result. Also, the circuit has several types of MOSFET connected in parallel. Types and numbers of MOSFETs are automatically selected to minimize the loss according to the magnitude of the current detected from the voltage between the MOSFET drain and the source. To create the power supply and the signal for the rectification circuit, the circuit needs no inputs from outside like a diode. Therefore, this circuit can be easily substituted for a conventional diode. In operation tests, the minimum forward voltage drop was 0.04 [V] when the current was rectified. As a result, the forward voltage drop was less than 1/10 compared to conventional diodes, and the loss could be decreased extremely. Therefore, the miniaturization of the electric equipment that radiation fin and fan becomes possible, too. The low-loss rectification circuit can save energies by substituting diodes for prevention of global warming.

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