MAX5974DETE+T Switching Controllers Active-Clamped, Spread-Spectrum, Current-Mode PWM Controllers
♠ Tlhaloso ea Sehlahisoa
| Sehlahisoa Tšobotsi | Boleng ba Tšobotsi |
| Moetsi: | Maxim e kopantsoe |
| Sehlopha sa Sehlahisoa: | Ho fetola Balaoli |
| RoHS: | Lintlha |
| Topology: | - |
| Nomoro ea Liphetho: | 1 Sephetho |
| Fetoha Maqhubu: | 600 kHz |
| Duty Cycle - Max: | 82% |
| Matla a Kena: | 10.5 V |
| Output Voltage: | - |
| Sephetho sa Hona Joale: | 1 mA |
| Mocheso o fokolang oa ho sebetsa: | - 40 C |
| Boholo ba Thempereichara ea Tšebetso: | + 85 C |
| Mounting Style: | SMD/SMT |
| Sephutheloana / Taba: | TQFN-16 |
| Sephutheloana: | Reel |
| Sephutheloana: | Khaola Theipi |
| Sephutheloana: | MouseReel |
| Lebitso: | Maxim e kopantsoe |
| Nako ea hoetla: | 14 ns |
| Phepelo ea Hona Joale: | 1.8 mA |
| Voltage e sebetsang ea phepelo: | 12 ho isa ho 21 V |
| Mofuta oa Sehlahisoa: | Ho fetola Balaoli |
| Nako ea ho Phahamisa: | 27 ns |
| Letoto: | MAX5974 |
| Bongata ba Pakete ea Feme: | 2500 |
| Sehlopha-potlana: | PMIC - Li-IC tsa Tsamaiso ea Matla |
| Mofuta: | Batsamaisi ba PWM ba Mokhoa oa Hona Joale |
| Karolo # Litlhaloso: | MAX5974 |
♠Balaoli ba PWM ba sebetsang, ba hasane, ba Mokhoa oa Hona Joale
MAX5974_ fana ka taolo bakeng sa wide-input-voltage, active-clamped, current-mode PWM, forward converters in Power-over-Ethernet (PoE) powered device cations (PD) application. MAX5974A/MAX5974C e loketse hantle mefuta e fapaneng ea ho kenyelletsa bokahohle kapa ea mohala, athe MAX5974B/ MAX5974D le eona e amohela matla a tlase a kenang ho fihla ho 10.5V.
Lisebelisoa li kenyelletsa likarolo tse 'maloa ho ntlafatsa katleho ea phepelo. Mokhanni oa AUX o khutlisa rente ea magnetizing cur rent ho fapana le ho e senya ka har'a potoloho ea li-clamp e senyang. Nako e ka khonehang ea ho shoa pakeng tsa AUX le mokhanni ea ka sehloohong e lumella ho fetola zero-voltage (ZVS). Tlas'a maemo a boima bo bobebe, lisebelisoa li fokotsa ho feto-fetoha ha li-switching (frequency foldback) ho fokotsa tahlehelo ea switching.
MAX5974A/MAX5974B e na le potoloho e ikhethang ho fihlela taolo ea tlhahiso ntle le ho sebelisa optocoupler, ha MAX5974C/MAX5974D e sebelisa mokhoa oa ho fana ka maikutlo a optocoupler. Amplifier ea phoso e ka hare e nang le 1% ea referense e molemo haholo ho moralo o sa tsitsang, ho felisa tlhoko ea taolo ea kantle ea shunt.
Lisebelisoa li na le clamp e ikhethang ea "feed-forward maximum duty-cycle clamp" e etsang hore boholo ba nako ea "clamp volt" nakong ea maemo a nakoana a sa sebetsane le voltage ea mohala, e lumellang tšebeliso ea motlakase oa MOSFET o nang le motlakase o tlase. Sebopeho sa programmable frequency dither ing se fana ka EMI e tlase, ts'ebetso ea ho ata.
MAX5974_ li fumaneha ka lilemo tsa pakete ea 16-pin TQFN-EP 'me li fuoe lintlha bakeng sa ts'ebetso ho feta -40°C ho ea +85°C le -40°C ho ea +125°C mokhahlelo oa mocheso.
● Peak Current-Mode Taolo, Active-Claped Forward PWM Controller
● Regulation Without Optocouupler (MAX5974A/ MAX5974B)
● Seamplifier sa Ka hare sa 1%
● 100kHz ho isa ho 600kHz E ka Lokisetsoang ±8% Ho Fetola Maqhubu, Amahanyo Ho fihlela ho 1.2MHz
● Programmable Frequency Dithering bakeng sa Low-EMI, Spread-Spectrum Operation
● Programmable Dead Time, PWM Soft-Start, Matšeliso a Hona Joale a Slope
● Programmable Feed-Forward Maximum Duty-Cycle Clamp, 80% Maximum Limit
● Frequency Foldback for High-Efficiency Light-Load Operation
● Ka hare Bootstrap UVLO le Large Hysteresis
● 100μA (mofuta) Ho Qala Hoa Hona Joale
● Fast Cycle-by-Cycle Peak Current-Limit, 35ns Tloaeleho ea ho Phatlalatsa
● 115ns Current-Sense Internal Leading-Edge Blanking
● Tšireletso ea Nako e Khutšoane ea Output ka Mokhoa oa Hiccup
● Fetolela Moedi wa Hona Jwale ho Thibela ho Tlama ha Transformer ka lebaka la ho Fetola ha Hona Jwale
● Internal 18V Zener Clamp on Supply Input
● 3mm x 3mm, Lead-Free, 16-Pin TQFN-EP
● PoE IEEE® 802.3af/at Powered Devices
● Matla a Phahameng a PD (Ka Ntle ho 802.3af/at Standard)
● Li-Active-Clamped Forward DC-DC Converters
● Mehala ea IP
● Wireless Access Nodes
● Lik'hamera tsa Tšireletso
