Abstract:
Disposed in a secondary side circuit of an AC adapter (10A), a−ΔI detection circuit (45) detects that a charging current (Ic) lowers less than a set current value to produce a detected signal. A voltage control circuit (42A) operates so as to repeat the steps of gradually lowering an adapter voltage (VADP) and of heightening the adapter voltage in response to the detected signal.
Abstract:
An AC adapter having a dual-bodied plug that can be rotated by 90 degrees relative to the adapter case so that the plug can be stored in the case when the adapter is not used and drawn out of the case when the adapter is in use. A blade distance adjusting unit provided in the case adjusts the distance between the blades of the plug. When the plug is drawn out of the case, the distance between the blades is increased up to the predetermined value. When the plug is stored in the case, the distance between the blades is reduced. The AC adapter can use a thinner case than conventional AC adapters of which plugs are monolithically structured.
Abstract:
A pin configuration adapter is disclosed which can be attached to an AC-adapter having a plug body having a first pin configuration and an AC-adapter housing having a power conversion circuit. The plug body is rotatable between a first position where it is accommodated in a recess formed in the AC-adapter housing and a second position where it is in an upright position with respect to the AC-adapter housing. The pin configuration adapter includes a plug part having a second pin configuration different from the first pin configuration; a receptacle part whereto the plug body in the second position can be inserted; a pin configuration adapter housing having an internal connection mechanism for electrically connecting the plug body and the plug part; and an engaging part provided on the pin configuration adapter housing and engages with the recess of the AC-adapter housing.
Abstract:
A charging circuit charging predetermined first and second batteries includes: a circuit configuration by which a second charging current charging the second battery is obtained by subtracting a first charging current charging the first battery from a current supplied by a power source; and a current setting part that sets the second charging current smaller than the first charging current at least at the beginning of charging.
Abstract:
An AC adapter (electronic device) comprises a coil spring (elastic member), an engagement member, and an AC plug in which a guide groove is formed in a holding portion thereof. One end portion of the coil spring is fixed in the holding portion, and the other end portion of the coil spring is fixed in a case. One end portion of the engagement member is engaged with the guide groove of the holding portion. The engagement place of the one end portion of the engagement member and the fixation place of the one end portion of the coil spring sandwich a central axis of a rotary shaft and are symmetric with respect to the central axis. The other end portion of the engagement member is engaged with a hole portion formed in the case. The guide groove engaged with the one end portion of the engagement member is shaped like a heart so as to rotate the AC plug. A heart-shaped concave portion of the guide groove functions as a fixing groove portion for temporarily fixing the AC plug in a position where the AC plug is rotated nearly 90 degrees.
Abstract:
Disposed in a secondary side circuit of an AC adapter (10A), a−ΔI detection circuit (45) detects that a charging current (Ic) lowers less than a set current value to produce a detected signal. A voltage control circuit (42A) operates so as to repeat the steps of gradually lowering an adapter voltage (VADP) and of heightening the adapter voltage in response to the detected signal.