US 10,172,193 B2
DC power supply and its LED lamp and control system
Xuejun Zou, Zhejiang (CN); and Xiaoyong Zhou, Zhejiang (CN)
Assigned to Self Electronics Co., Ltd., Ningbo (CN)
Filed by Self Electronics Co., Ltd., Ningbo, Zhejiang (CN); Wanjiong Lin, Ningbo, Zhejiang (CN); and Self electronics USA Corporation, Norcross, GA (US)
Filed on Apr. 10, 2018, as Appl. No. 15/949,668.
Claims priority of application No. 2017 1 0256019 (CN), filed on Apr. 19, 2017.
Prior Publication US 2018/0310371 A1, Oct. 25, 2018
Int. Cl. H05B 37/02 (2006.01); H05B 33/08 (2006.01); H02M 1/00 (2006.01); H02M 7/5387 (2007.01); H02M 7/44 (2006.01)
CPC H05B 33/0809 (2013.01) [H02M 7/44 (2013.01); H02M 7/53871 (2013.01); H05B 33/089 (2013.01); H05B 33/0845 (2013.01); H05B 33/0851 (2013.01); H05B 33/0854 (2013.01); H05B 33/0884 (2013.01); H05B 37/0209 (2013.01); H05B 37/0227 (2013.01); H05B 37/0272 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A DC power supply for preventing output from being misconnected to a power supply, comprising:
a DC power supply comprised of a positive output terminal and a negative output terminal, and an anti-misconnection module electrically connected to the DC power supply wherein the anti-misconnection module comprises a positive access terminal and a negative access terminal which are electrically connected to the positive and negative output terminals of the DC power supply respectively, a NMOS transistor controlling on-off of the negative access terminal, a load access unit performing a turn-on operation of the NMOS transistor, a forward blocking unit performing a turn-off operation of the NMOS transistor, and a backward access unit performing a turn-off operation of the NMOS transistor,
the source electrode and the drain electrode of the NMOS transistor being connected in series at the negative access terminal, the load access unit being electrically connected between the positive output terminal and the gate of the NMOS transistor wherein the load access unit comprises a diode D1 connected in series between the positive output terminal and the gate of the NMOS transistor wherein the cathode of the diode D1 is connected to the gate of the NMOS transistor,
the forward blocking unit comprising a diode D2 connected in series between the positive output terminal and the positive access terminal and a diode D3 connected in series between the positive access terminal and the gate of the NMOS transistor wherein the cathode of the diode D2 is electrically connected to the positive access terminal and the cathode of the diode D3 is electrically connected to the positive access terminal,
the backward access unit comprising a diode D4 connected between the gate and the source electrode of the NMOS transistor, a zener diode D5 connected in series between the negative input terminal and the gate of the NMOS transistor and a transistor Q1 wherein the cathode of the diode D4 is electrically connected to the gate of the NMOS transistor and the cathode of the zener diode D5 is connected to the negative input terminal, the base of the transistor Q1 is connected to the anode of the diode D5, the collector of the transistor Q1 thereof is connected to the gate of the NMOS transistor and the emitter of the transistor Q1 is connected to the source electrode of the NMOS transistor and the negative output terminal of the DC power supply.