Ib qho ntawm cov thev naus laus zis thev naus laus zis ntawm cov kiv cua portable (tshwj xeeb tshaj yog cov kiv cua ntawm tes) yog lithium roj teeb boost / tas li voltage nti daws, siv los txhawb qhov tsis tshua muaj hluav taws xob ntawm lithium roj teeb (xws li 3.7V) rau qhov siab voltage xav tau los ntawm kiv cua lub cev muaj zog. Nws txoj haujlwm ua haujlwm yog ua raws li lub zog khaws cia cov yam ntxwv ntawm inductors thiab capacitors thiab pulse width modulation (PWM) technology. Cov nti khaws cia thiab tso tawm lub zog hauv lub inductor los ntawm kev tswj lub xeev nyob rau hauv thiab tawm ntawm lub internal switching transistors, yog li ua tiav voltage boosting thiab ruaj khov tso zis.
Taking the H6922 chip as an example, such chips typically feature a wide input voltage range (e.g., 2.8-40V), high conversion efficiency (>95%), thiab kev siv hluav taws xob tsawg.
Hom kev daws teeb meem no tsis yog siv rau hauv cov kiv cua portable nkaus xwb tab sis kuj tau siv dav hauv cov khoom siv hluav taws xob hluav taws xob, lub suab amplifiers, LCD backlighting, thiab lwm yam.
