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1. (WO2019024364) POWER CONVERSION CIRCUIT AND PROJECTOR
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Pub. No.: WO/2019/024364 International Application No.: PCT/CN2017/114722
Publication Date: 07.02.2019 International Filing Date: 06.12.2017
IPC:
H02M 1/32 (2007.01) ,H02H 7/12 (2006.01)
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
M
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1
Details of apparatus for conversion
32
Means for protecting converters other than by automatic disconnection
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
7
Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
10
for converters; for rectifiers
12
for static converters or rectifiers
Applicants:
深圳光峰科技股份有限公司 APPOTRONICS CORPORATION LIMITED [CN/CN]; 中国广东省深圳市南山区粤海街道学府路63号高新区联合总部大厦20-22楼 20F-22F, High-Tech Zone Union Tower, No.63, Xuefu Road, Yuehai Street, Nanshan District, Shenzhen, Guangdong 518000, CN
Inventors:
戴平安 DAI, Pingan; CN
李屹 LI, Yi; CN
Priority Data:
201710650002.902.08.2017CN
Title (EN) POWER CONVERSION CIRCUIT AND PROJECTOR
(FR) CIRCUIT DE CONVERSION DE PUISSANCE ET PROJECTEUR
(ZH) 电源转换电路及投影机
Abstract:
(EN) Provided are a power conversion circuit (100) and a projector using the power conversion circuit. The power conversion circuit (100) comprises an LDO chip (1) and a first overvoltage protection circuit (2) and a second overvoltage protection circuit (3) respectively connected to the output end of the LDO chip (1); The first overvoltage protection circuit (2) is configured to implement an instantaneous short circuit to ground when the voltage of the output end of the LDO chip (1) is higher than a first preset voltage value; The second overvoltage protection circuit (3) is configured to stop normal operation when the output voltage of the LDO chip (1) is higher than a second preset voltage value. The power conversion circuit and the projector have excellent overvoltage protection performance and high reliability.
(FR) L'invention concerne un circuit de conversion de puissance (100) et un projecteur utilisant le circuit de conversion de puissance. Le circuit de conversion de puissance (100) comprend une puce de LDO (1) et un premier circuit de protection contre les surtensions (2) et un deuxième circuit de protection contre les surtensions (3) connectés respectivement à l'extrémité de sortie de la puce de LDO (1); le premier circuit de protection contre les surtensions (2) sert à mettre en œuvre un court-circuit instantané à la masse lorsque la tension de l'extrémité de sortie de la puce de LDO (1) est supérieure à une première valeur de tension prédéfinie; le deuxième circuit de protection contre les surtensions (3) sert à arrêter le fonctionnement normal lorsque la tension de sortie de la puce de LDO (1) est supérieure à une deuxième valeur de tension prédéfinie. Le circuit de conversion de puissance et le projecteur présentent une excellente performance de protection contre les surtensions et une haute fiabilité.
(ZH) 一种电源转换电路(100)和运用所述电源转换电路的投影机,包括LDO芯片(1)以及分别连接至所述LDO芯片(1)的输出端的第一过压保护电路(2)和第二过压保护电路(3);所述第一过压保护电路(2)用于当所述LDO芯片(1)的输出端的电压高于第一预设电压值时,实现瞬间对地短路;所述第二过压保护电路(3)用于当所述LDO芯片(1)的输出电压高于第二预设电压值时,停止正常工作。该电源转换电路和投影机的过压保护性能好且可靠性强。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Chinese (ZH)
Filing Language: Chinese (ZH)