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TI UC3861DW

Producent
TI
Nr części prod.
UC3861DW
Nr LCSC
C93602
Opak.
SOIC-16-300mil
Numer Klienta
Klucz. cechy
1A 10kHz~1MHz 1W 10.5V~22V 4.8V~5.2V SOIC-16-300mil AC DC Converters, Offline Switchers RoHS
Karta KatalogowaTI UC3861DW
Zgodność z RoHS1 dokumentów dostępnych
Brak w magazynie
Powiadom mnie
Minimum: 1Wielokrotność: 1Jednostka sprzedaży: Piece
Dodaj do Listy BOM
Szt.Cena jedn.(Tylko do wglądu)Suma całkowita
1+$ 11.2899$ 11.29
10+$ 10.7551$ 107.55
30+$ 9.8316$ 294.95
100+$ 9.0248$ 902.48
Standardowa Obudowa40/Full Tube
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Specyfikacje Produktu

Wszystko
TypOpis
KategoriaIntegrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers
ProducentTI
Opak.SOIC-16-300mil
Operating Temperature0℃~+70℃
Output Current1A
Frequency - Switching10kHz~1MHz
Pd - Power Dissipation1W
Voltage - Breakdown-
Voltage - Supply10.5V~22V
FeaturesAdjustable soft-start;Under-voltage lockout;Under Voltage Protection
TopologyFull-Bridge;Half-Bridge;Push-Pull
Output Voltage4.8V~5.2V
Duty Cycle(Max)-
Feedback System-
Working ModeQR
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Opis

Tłumaczenie AI
  • Controls Zero Current Switched (ZCS) or Zero Voltage Switched (ZVS) Quasi-Resonant Converters
  • Zero-Crossing Terminated One-Shot Timer
  • Precision 1%, Soft-Started 5V Reference
  • Programmable Restart Delay Following Fault
  • Voltage-Controlled Oscillator (VCO) with Programmable Minimum and Maximum Frequencies from 10kHz to 1MHz
  • Low Start-Up Current (150μA typical)
  • Dual 1Amp Peak FET Drivers
  • UVLO Option for Off-Line or DC/DC Applications
  • The UC1861 - 1868 family of ICs is optimized for the control of Zero Current Switched and Zero Voltage Switched quasi-resonant converters. Differences between members of this device family result from the various combinations of UVLO thresholds and output options. Additionally, the one-shot pulse steering logic is configured to programme either on-time for ZCS systems (UC1865 - 1868), or off-time for ZVS applications (UC1861 - 1864).
  • The primary control blocks implemented include an error amplifier to compensate the overall system loop and to drive a voltage controlled oscillator (Vco), featuring programmable minimum and maximum frequencies. Triggered by the VcO, the one-shot generates pulses of a programmed maximum width, which can be modulated by the Zero Detection comparator. This circuit facilitates “true” zero current or voltage switching over various line, load, and temperature changes, and is also able to accommodate the resonant components' initial tolerances.
  • Under-Voltage Lockout is incorporated to facilitate safe starts upon power-up. The supply current during the under-voltage lockout period is typically less than 150μA and the outputs are actively forced to the low state.
  • UVLO thresholds for the UC1861/62/65/66 are 16.5V (ON) and 10.5V (OFF), whereas the UC1863/64/67/68 thresholds are 8V (ON) and 7V (OFF). After Vcc exceeds the UVLO threshold, a 5V generator is enabled which provides bias for the internal circuits and up to 10mA for external usage.
  • A Fault comparator serves to detect fault conditions and set a latch while forcing the output drivers low. The SoftRef pin serves three functions: providing soft start, restart delay, and the internal system reference.
  • Each device features dual 1Amp peak totempole output drivers for direct interface to power MOSFETS. The outputs are programmed to alternate in the UC1861/63/65/67 devices. The UC1862/64/66/68 outputs operate in unison allowing a 2Amp peak current.