Ib Txoj Cai Siv Tam Sim No Tam Sim No Tsim Nyog Rau Kev Hloov Cov Cai Uas Tuav Tseg

Txoj hauv kev tshiab ntawm kev kuaj pom tam sim no rau kev hloov cov cai tswj hwm. Siv cov kev sib raug zoo ntawm cov khoom thauj tam sim no nyob rau hauv hom tsis sib cais (DCM) thiab lub rooj vag tsav teeb liab N_DRV ntawm lub raj xa hluav taws xob, cov zis thauj khoom tam sim no ntawm hloov mus rau cov chaw hloov tsheb tau kuaj pom los ntawm lub rooj vag teeb liab. Txoj kev no txo ​​cov hluav taws xob sib xyaw tsim los ntawm kev txheeb xyuas ncaj qha tam sim no ntawm qhov nruab nrab ntawm tus inductor, thiab txuag cov nqi ntawm cov qauv tsim chip. Siv 0.5μm CMOS txheej txheem, Hspice simulation pov thawj, nws tsuas yog noj 5μA quiescent tam sim no. Cov ntsiab lus: hloov kev tswj hwm; hom tsis ua (DCM); qhov tam sim no pom zoo 1. Taw qhia Nrog rau kev tsim cov khoom siv hluav taws xob mus rau miniaturization thiab tsiv chaw, monolithic kev sib xyaw ua haujlwm siab, qis hluav taws xob tsis txaus voltage DC-DC cov hloov pauv tau siv dav siv. Cov xov hluav taws xob tam sim no raug siv nyob rau hauv ntau qhov kev tswj hwm hluav taws xob ICs. Nyob rau hauv hom tam sim no PWM tswj DC-DC hloov, qhov ntsuas tam sim no yog ib qho tseem ceeb ntawm lub voj tam sim no, siv los xyuas txog qhov tam sim no ntws los ntawm lub hwj chim raj thiab qhov inductor, thiab los ntawm qhov kev tshwm sim tam sim no thiab cov zis hluav taws xob voj Ua ib qho kev sib piv kom ua tiav cov txiaj ntsig ntawm cov mem tes dav kev ntsuas. Nyob rau hauv voltage hom pulse dav tes taws tes taws los hloov DC-DC hloov pauv (PWM DC-DC Converter), qis tawm cov kab hluav taws xob (LDO), cov twj tso kua mis tawm (Cov Twj Pov Hwm) thiab lwm cov kab hluav taws xob, nws kuj tuaj yeem siv ua qhib Circuit Court, luv Circuit Court, dhau tam sim no Thiab lwm lub zog-txuag thiab tiv thaiv lub hom phiaj. Nws muaj peb txoj kev ua kom tam sim no: siv R [sub] DS [/ sub] ntawm lub hwj chim rau kev kuaj kom pom; siv rau kev ua kom paub teb-nyhuv transistor rau kuaj; ua ke ntawm kev ua haujlwm ntawm kev ua haujlwm ntawm transistor thiab kuaj kom paub tias resistor. Kev ua ntawm txoj kev hloov pauv mus rau lwm tus, uas yog qhov txawv ntawm txoj kev nrhiav kom tau tam sim no, daim ntawv no nthuav tawm ib qho kev hloov pauv tshiab rau cov kws tswj txoj haujlwm tam sim no. 2. Siv cov tshuaj tam sim no tam sim no 2.1 Siv R [sub] DS [/ sub] ntawm lub hwj chim raj ua kom pom (RDS SENSING) Peb paub tias thaum lub hwj chim raj (POWER MOSFET) tau qhib, nws ua haujlwm hauv thaj chaw tsis sib xws. thiab tuaj yeem tos Qhov cuam tshuam yog qhov ua tiav, thiab qhov sib npaug tiv taus yog: Ib hom tshiab tam sim no kev nrhiav kom haum rau kev hloov cov neeg tswj hwm