Nec Toshiba Space Systems, Ltd.

Nec Corporation

Japan Aerospace Exploration Agency

Teiji Yoshida

Tomotake Gondai

Koichi Kibe

Hiroaki Kusawake

Hitoshi Naito

Go Segami

Main arrays (MA-MAm) of solar cells () are provided so as to correspond to shunt circuits (SM-SMm), respectively. Charge arrays (CA-CAn) are provided so as to correspond to shunt circuits (SC-SCn) and charging circuits (CH-CHn), respectively. Each shut circuit operates independently from other shunt circuits, and each charging circuit operates independently from other charging circuits.

Power supply controller

Disclosed is a low noise, non-isolated DC-DC converter for providing a non-inverted (i.e., the same polarity as an input voltage) output voltage of any desired voltage by stepping-up/down the input voltage. It comprises an input coil L, an input capacitor Cand a second intermediate coil Lmconnected in series between both ends of the input voltage source, an output coil L, an output capacitor Cand a first intermediate coil Lmconnected in series between both ends of a load Ro, a switching device S connected between a node a of the Land the Cand a node b of the Cand the Lm, and a diode D connected between a node d of the Cand the Lmand a node c of the Cand the L

DC-DC converter

A step-down switching DC-DC converter may include an input coil on the input side, an output coil on the output side, a switch, an output capacitor, a first series circuit connected between a connection point on which the input coil and the switch are connected each other and a negative pole of a power source, and a second series circuit connected between a connection point on which the output coil and the switch are connected to each other and the negative pole of the power source. A connection point between a first intermediate capacitor and the first intermediate coil is connected to a connection point between a second intermediate capacitor and the switch via a switching device cooperating with the switch. The input coil and the first intermediate coil are electromagnetically coupled with each other. The output coil and the second intermediate coil are electromagnetically coupled with each other.

Step-down switching DC-DC converter

Growing community of inventors

Tokyo, Japan

Teiji Yoshida