Title:
電源供給制御回路
Document Type and Number:
Japanese Patent JP5786275
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To detect voltage reduction even at a power supply destination by using an overvoltage protection circuit.SOLUTION: A base is connected to an output terminal of a DC/DC converter 73 via a resistor R2 and grounded to the ground via a resistor R3. A collector is connected to the output terminal of a DC/DC converter 72 via a resistor R1. By disposing a transistor Q1 with an emitter grounded to the ground a voltage reduction detection circuit 78 is formed, and a connection point P between the collector of the transistor Q1 and the resistor R1 in the voltage reduction detection circuit 78 is connected to the overvoltage protection circuit 76. By this arrangement, reduction in the output of the DC/DC converter 73 can be detected by using the overvoltage protection circuit 76. As a result, in order to detect the reduction in the output of the DC/DC converter 73, a device can be made more conpact, compared to a case where an exclusive detection circuit is provided separately.
Inventors:
Tadashi Otsuka
Application Number:
JP2010065859A
Publication Date:
September 30, 2015
Filing Date:
March 23, 2010
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
B41J29/38; G03G15/20; G03G21/00; G06F3/12; H02M3/00
Domestic Patent References:
| JP2010057327A | ||||
| JP2000092744A | ||||
| JP2002017084A | ||||
| JP2009022152A | ||||
| JP2003009383A | ||||
| JP11220871A |
Attorney, Agent or Firm:
Masahiko Ueyanagi
Osamu Suzawa
Osamu Suzawa