Okwu mmeghe nke teknụzụ sekit ihe nkwụnye ọkụ maka TV

1, Okwu Mmalite;

Ịgbanwe ọkụ eletrik nwere uru doro anya dị ka obere ike ọkụ, nnukwu arụmọrụ na obere olu. A na-ejikarị ya eme ihe na ngwaahịa eletrik na ngwá electronic. Dị ka mmepụta voltaji stabilizing akara mode nke sekit, ịgbanwee ike ọkọnọ nwere ike kewaa atọ ụdị: pulse width modulation (PWM), pulsefrequency modulation (PFM) na pulse rate modulation (PWM). Dị ka ihe na-akpalite mode, ịgbanwee ike ọkọnọ nwere ike kewaa n'ime onwe-mmasị ụdị na ndị ọzọ na-akpali akpali, The ịgbanwee ike nkwụnye kọwara n'isiokwu a bụ pulse width modulation (PWM). Ọ bụ ihe na-enye ọkụ ọkụ na-akpali akpali, nke na-ewepụta voltaji 12V DC na-achịkwa nke a na-ejikarị na ngwaahịa eletriki na ngwa eletrọnịkị, na mmepụta gosiri ugbu a bụ 6A. Ọ dabara maka ntinye ike DC nke LCD TV n'ime sentimita 32.

2, Nka na ụzụ nkọwa nke ụgbọala sekit nke ịmafe ike nkwụnye;

The mbanye mgbawa ob2269 eji na ịgbanwee ike ọkọnọ kọwara n'isiokwu a nakweere a pụrụ iche imewe atụmatụ, nke bụ na ike ọkọnọ usoro nwere nnukwu ego arụmọrụ na ike izute chọrọ nke ìgwè mmadụ.

Ob2269 na-anakwere ụkpụrụ omenala ugbu a ma nwee njirimara ndị a;

▲ obere njikere ike oriri: imewe nke ala-ike intermittent na-arụ ọrụ mode nwere ike ọ bụghị nanị na-eme ka dum usoro mfe ịghọta ọhụrụ na-atụ aro nke International Energy Agency n'okpuru dịghị-ibu.

▲ arụ ọrụ enweghị mkpọtụ: mkpọtụ ụda agaghị apụta n'okpuru ibu dị mfe na ibu zuru oke. Nhazi usoro kachasị mma nwere ike ime ka usoro ahụ rụọ ọrụ nke ọma na steeti ọ bụla na-arụ ọrụ.

▲ mmalite mmalite ugbu a: VIN / VDD mmalite dị ugbu a dị ka 4ua, nke nwere ike belata mfu nke sistemụ ịmalite sekit ma belata oge mmalite nke sistemụ.

▲ obere arụ ọrụ ugbu a: ugbu a na-arụ ọrụ dị ihe dị ka 2.3ma, nke nwere ike belata mfu nke sistemụ ma melite arụmọrụ nke sistemụ.

▲ wuru na nkwụghachi ụgwọ OCP: arụ ọrụ nkwụghachi ụgwọ OCP arụnyere na-eme ka usoro OCP nke usoro ahụ na-adị larịị na oke voltaji niile n'ebughị ọnụ ahịa, ka ọ wee melite arụmọrụ ọnụ ahịa nke sistemụ ahụ.

▲ ọrụ nchebe ụda: ọ nwere ọrụ nchekwa nchekwa overvoltage (OVP), ọrụ nchekwa nchekwa okpomọkụ (OTP), ọrụ nchebe n'okpuru voltaji (UVLO) na ọrụ nchekwa oke mmepụta (OLP), yana ọrụ nchekwa ụda.

▲ MOSFET soft drive: ọ nwere ike melite EMI nke sistemu nke ọma.

2269 atụmatụ nke sistemụ arụnyere: ọ nwere ike belata EMI nke ọma ma belata EMI.

3, Eletriki schematic eserese nke ịmafe ike nkwụnye;