To provide a reverse connection preventing circuit for reliably preventing reverse connection while reducing the cost of an entire system using the reverse connection preventing circuit.
A latch relay 22, a second diode 23 for reverse connection prevention, a MOSFET 26 for ON, and a MOSFET 27 for OFF are connected such that a current flows in a positive electrode input terminal 20a from a negative electrode input terminal 20b via a parasitic diode 26a for ON, a flywheel diode 24 for counter-electromotive noise removal for ON, a coil 22c for contact OFF, and a flywheel diode 25 for counter-electromotive noise removal for OFF at reverse connection, thus allowing the current to flow in the coil 22c for contact OFF in the same direction as that of current flowing in the coil 22c for contact OFF when a battery 10 is normally connected to the reverse connection preventing circuit 20, and hence reliably breaking energization of a latch unit 22a.
TAKAUCHI AKIRA
TAKAGI NOBUTOMO
| JP2007014165A | 2007-01-18 | |||
| JPH0660910A | 1994-03-04 | |||
| JPS6310739U | 1988-01-23 | |||
| JP2002175124A | 2002-06-21 | |||
| JP2000138023A | 2000-05-16 | |||
| JP2007014165A | 2007-01-18 | |||
| JPH0660910A | 1994-03-04 | |||
| JPS6310739U | 1988-01-23 | |||
| JP2002175124A | 2002-06-21 |
Takahiro Miura
Fumihiro Mizuno