Self-supplied dc/dc switching power supply

Details Self-supplied dc/dc switching power supply Self-supplied dc/dc switching power supply

H - Electricity

02

M

H02M 3/04 (2006.01) H02H 1/06 (2006.01)

Patent

CA 2325680

The present invention provides a self supplied DC/DC switching power supply circuit for emergency notification and similar applications. The circuit includes a control circuit in electrical communication with an igniter circuit. The igniter circuit provides a temporary activation voltage to the control circuit for activation thereof. The igniter circuit provides the activation voltage for a limited time duration sufficient for enablement of the switching power supply circuit after which time power is supplied to such control circuit by the output voltage. The present invention SPS circuit can use a single-cell battery pile or other low-voltage source as low as 0.3V DC while realizing improved efficiency over a wide range of input voltages.

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