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Design of power delivery system has great influence on the power management in many-core processor systems. Moving voltage regulators from off-chip to on-chip gains more and more interest in the power delivery system design, because it is able to provide fine-grained dynamic voltage scaling. Previous works are proposed to implement power efficient on-chip voltage regulators. It is important to analyze...
A soft switching active-clamp dual series-resonant converter is proposed in this paper. Two small transformers are used at the proposed topology to provide more load power. An active-clamp circuit is used to absorb the energy stored in the leakage inductor of transformer, to clamp voltage stresses across switches, and to realize the ZVS turn-on of switches in order to alleviate the switching losses...
In this paper, a step-up active-clamp SEPIC with bi-transformer is presented for battery sourcing application. Two voltage double circuits are connected in series at secondary side, thus, the output voltage could be increase compared with the conventional isolated SEPIC converter. The voltage double circuit at secondary side provides high voltage gain and limits the voltage spike on output diodes...
This paper presents an interleaved converter to share the load current and achieve soft switching feature on switches. There are two modules in the proposed converter. Two modules are operated with the interleaved PWM to achieve load current sharing, reduce the current ripple on the output capacitor, and regulate the output voltage. In each module, there are two circuit cells to achieve parallel operation...
This paper presents a soft switching converter with interleaved pulse-width modulation (PWM) scheme. There are two circuit modules in the proposed converter to share the load current. The interleaved PWM scheme is adopted to control two converter modules such that the input and output ripple currents and the current stresses on power switches and transformer windings are reduced. In each converter...
A dual resonant converter using active clamp circuit is presented in this paper. The active clamp circuit is employed to limit the voltage stress and create zero-voltage-switching (ZVS) turn-on feature for power switches. Moreover, the dual resonant tanks are composed by the leakage inductors and resonant capacitors to achieve zero-current-switching (ZCS) turn-off mechanism for diodes at the secondary...
This paper presents a zero voltage switching (ZVS) Cuk converter with double ended rectifier to reduce switching losses on power semiconductors, decrease voltage stresses on rectifier diodes and achieve power delivery to output load in positive and negative half cycle of the secondary winding voltage. An auxiliary switch and a clamp capacitor are connected in parallel with the primary side of the...
This paper presents the system analysis and circuit characteristics of an interleaved soft switching DC-DC converter. One auxiliary switch and one fast recovery diode are connected between the half-bridge leg and the middle point of split capacitors to generate three different voltage levels on the primary side of transformer. The zero voltage switching (ZVS) is achieved at the transition interval...
This paper presents very small bandpass filters embedded in an organic laminate substrate for wireless system-in-package applications. Due to the lack of a fabrication process for high capacitance density capacitors on the applicable substrate, the proposed bandpass filter designs are based on a modified T prototype. By carefully taking parasitic and coupling effects into account in the filter synthesis...
A bidirectional dc converter with high conversion ratio is presented in this paper to have the capability of bidirectional power flow. Two boost conversion stages are adopted in the converter to achieve high voltage step-up conversion. The other power flow direction can also be achieved in the proposed converter with low voltage step-down conversion. Comparison with the conventional boost converter...
A dual-output LLC resonant converter for LCD-TV applications is presented in this paper. Based on the LLC resonant behavior, the power MOSFETs are turned on at zero voltage switching (ZVS) and secondary rectifier diodes are turned off at zero current switching (ZCS). In the proposed converter, the primary windings of two transformers are connected in series so that the primary currents of two transformers...
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