Otu Nkwụsị Ọrụ SON8 TPS7A8101QDRBRQ1 na nke mbụ na nke ọhụrụ IC Electronics ibe.
Njirimara ngwaahịa
| Ụdị | Nkọwa |
| Otu | Sekit jikọtara ọnụ (ICs) |
| Mfr | Ngwa Texas |
| Usoro | Ụgbọ ala, AEC-Q100 |
| ngwugwu | teepu & Reel (TR) Mpempe akwụkwọ (CT) Digi-Reel® |
| SPQ | 3000 T&R |
| Ọnọdụ ngwaahịa | Na-arụ ọrụ |
| Nhazi mmepụta | Nke dị mma |
| Ụdị mmepụta | Enwere ike idozi |
| Ọnụọgụ nke ndị nchịkwa | 1 |
| Voltaji - Ntinye (Max) | 6.5V |
| Voltaji - Mpụta (Nkeji/Edozi) | 0.8V |
| Voltaji - Mpụta (Max) | 6V |
| Mwepụ voltaji (Max) | 0.5V @ 1A |
| Ugbu a - Mmepụta | 1A |
| Ugbu a - Quiescent (Iq) | 100 µA |
| Ugbu a - Nbunye (Max) | 350 µA |
| PSRR | 48dB ~ 38dB (100Hz ~ 1MHz) |
| Njirimara njikwa | Kwado |
| Njirimara nchedo | N'ofe ugbu a, karịrị okpomoku, polarity reverse, n'okpuru mgbachi voltaji (UVLO) |
| Okpomọkụ na-arụ ọrụ | -40°C ~ 125°C (TJ) |
| Ụdị nkwụnye | Ugwu elu |
| Ngwungwu / Akpa | Mpempe akwụkwọ ekpughere 8-VDFN |
| Ngwungwu ngwaọrụ ndị na-eweta ihe | 8-ỤMỤ (3x3) |
| Nọmba ngwaahịa ntọala | TPS7A8101 |
Otu LDO, ma ọ bụ onye na-ahụ maka nkwụsịtụ dị ala, bụ onye na-ahụ maka usoro nkwụsịtụ dị ala nke na-eji transistor ma ọ bụ field effect tube (FET) na-arụ ọrụ na mpaghara saturation ya iji wepụ oke voltaji na voltaji ntinye etinyere iji mepụta voltaji mmepụta ahaziri ahazi.
Ihe anọ bụ isi bụ Dropout, Noise, Power Supply Rejection Ratio (PSRR), na Quiescent Current Iq.
Ihe ndị bụ isi: mmalite sekit, nkeji isi iyi isi iyi mgbe niile, sekit na-enyere aka, mmezi ihe, isi iyi, amplifier njehie, netwọk nzaghachi nzaghachi na sekit nchebe, wdg.
Ụkpụrụ ọrụ
Sekit isi nke LDO nwere VT nke na-achịkwa usoro, ihe nleba anya R1 na R2, yana amplifier A.
A na-eme ka usoro ahụ dịkwuo elu, ma ọ bụrụ na pin na-eme ka ọ dị elu, sekit ahụ na-amalite, isi iyi nke isi iyi mgbe niile na-enye ihe nhụsianya na sekit dum, a na-eme ka ọkụ ọkụ na-ezo aka ngwa ngwa, a na-eji voltaji ntinye na-enweghị nchịkwa dị ka voltaji. nke ike ọkọnọ, voltaji ntụaka na-eji dị ka-adịghị mma frasi input voltaji nke njehie amplifier, resistor nzaghachi netwọk kewara mmepụta voltaji na-enweta nzaghachi voltaji, nke a nzaghachi voltaji bụ ntinye na otu ntụziaka ọnụ nke njehie comparator, na ihe ọjọọ voltaji nzaghachi a bụ ntinye aka na akụkụ isotropic nke comparator njehie ma jiri ya tụnyere voltaji ntụaka na-adịghị mma.Ọdịiche dị n'etiti abụọ voltaji na-amụba site njehie amplifier ozugbo na-achịkwa ọnụ ụzọ ámá nke ike na-emezi mmewere, na mmepụta nke LDO na-achịkwa site na-agbanwe agbanwe conduction ọnọdụ nke mgbanwe tube, ie Vout = (R1 + R2) / R2 × Vref
N'ezie onye na-ahụ maka usoro nkwụsịtụ dị ala nwekwara ọrụ ndị ọzọ dị ka nchekwa sekit dị mkpụmkpụ, nkwụsị oke ọkụ, nkwụsị ọkụ, nchebe njikọ azụ, wdg.
Uru, ọghọm na ọnọdụ dị ugbu a
Low Dropout Voltage (LDO) linear regulators dị ọnụ ala, obere mkpọtụ, obere quiescent ugbu a, ole na ole mpụga akụrụngwa, na-abụkarị naanị otu ma ọ bụ abụọ gafere capacitors, na nwere nnọọ ala mkpọtụ nke onwe na a elu ike ọkọnọ Rejection Ratio (PSRR).LDO bụ obere Sistemu dị na Chip (SoC) nwere nri onwe ya dị ala.Enwere ike iji ya maka njikwa ọwa isi ugbu a ma nwee sekit ngwaike agbakwunyere dị ka MOSFETs nwere oke in-line na-eguzogide, Schottky diodes, sampling resistors, na voltaji nkesa, yana nchebe karịa ugbu a, nchebe oke okpomọkụ, isi mmalite ntụaka nkenke, amplifiers dị iche iche, ndị na-egbu oge, wdg. PG bụ ọgbọ ọhụrụ nke LDO nwere nnwale onwe onye maka steeti nrụpụta ọ bụla na-egbu oge nchekwa ike, nke nwekwara ike ịkpọ Ike dị mma, ntụgharị “ike ọma ma ọ bụ ike kwụsie ike” .Ọtụtụ LDO chọrọ naanị otu capacitor na ntinye yana otu na mmepụta maka ịrụ ọrụ kwụsiri ike.
Ndị LDO ọhụrụ nwere ike nweta nkọwapụta ndị a: mkpọtụ mmepụta nke 30µV, PSRR nke 60dB, quiescent current nke 6µA, na mbelata voltaji nke naanị 100mV.Isi ihe kpatara arụmọrụ a ka mma nke LDO linear regulators bụ na onye na-achịkwa na-eji bụ MOSFET P-channel, nke na-ebugharị voltaji na-achọghị ugbu a, na-ebelata ugbu a nke ngwaọrụ ahụ n'onwe ya na-adaba na voltaji na-adaba na ya.dobe hà nhata na ngwaahịa nke mmepụta ugbu a na nke na-eguzogide.Mbelata voltaji gafere MOSFET dị obere n'ihi nguzogide ya dị ala.Ndị na-ahazi linear na-ejikarị transistor PNP.Na sekit nwere transistor PNP, mbelata voltaji dị n'etiti ntinye na mmepụta agaghị adị oke ala iji gbochie transistor PNP ịbanye na saturation na ibelata ikike mmepụta.
