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ReferenzdesignLT3752-1

Analog Devices LT3752-1

LT3752/LT3752-1 - Active Clamp Synchronous Forward Controllers with Internal Housekeeping Controller

Details

TopologieEintaktflusswandler
Eingangsspannung75-150 V
Schaltfrequenz100-500 kHz
Ausgang 124 V / 14 A
IC-RevisionB

Beschreibung

The LT®3752/LT3752-1 are current mode PWM controllers optimized for an active clamp forward converter topology. A DC/DC housekeeping controller is included for improved efficiency and performance. The LT3752 allows operation up to 100V input and the LT3752-1 is optimized for applications with input voltages greater than 100V.

A programmable volt-second clamp allows primary switch duty cycles above 50% for high switch, transformer and rectifier utilization. Active clamp control reduces switch voltage stress and increases efficiency. A synchronous output is available for controlling secondary side synchronous rectification.

The LT3752/LT3752-1 are available in a 38-lead plastic TSSOP package with missing pins for high voltage spacings.

Eigenschaften

  • Input Voltage Range: LT3752: 6.5V to 100V, LT3752-1:Limited Only by External Components
  • Internal Housekeeping DC/DC Controller
  • Programmable Volt-Second Clamp
  • High Efficiency Control: Active Clamp, Synchronous Rectification, Programmable Delays
  • Short-Circuit (Hiccup Mode) Overcurrent Protection
  • Programmable Soft-Start/Stop
  • Programmable OVLO and UVLO with Hysteresis
  • Programmable Frequency (100kHz to 500kHz)
  • Synchronizable to an External Clock

Typische Anwendungen

  • Offline and HV Car Battery Isolated Power Supplies
  • Industrial, Automotive and Military Systems
  • 48V Telecommunication Isolated Power Supplies

Weiterführende Informationen

Artikeldaten

Artikel Nr.
Daten­blatt
Simu­lation
Downloads
Status
Produktserie
Vin
VOut1(V)
IOut1(mA)
Vaux(V)
RDC 1(Ω)
RDC 2(Ω)
RDC 3(Ω)
fswitch(kHz)
L(mH)
NPRI : NSEC : NAUX
ISAT(mA)
VT(V (AC))
L(mm)
B(mm)
H(mm)
Montageart
Bauform
MusterVerfügbarkeit & Muster
750817020
SPECWE-OLLT Offline Flyback Transformers, 141 - 318 V (AC), 10 V
Simu­lation
Verfügbarkeit
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Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
ProduktserieWE-OLLT Offline Flyback Transformers
Input Voltage 141 - 318 V (AC)
Ausgangsspannung 110 V
Ausgangsstrom 1150 mA
Hilfsspannung12 V
Gleichstromwiderstand 124.8 Ω
Gleichstromwiderstand 20.235 Ω
Gleichstromwiderstand 30.4 Ω
Switching Frequency 150
Induktivität4 mH
Übersetzungsverhältnis9.33:1:1.17 
Sättigungsstrom340 mA
Prüfspannung4600 V (AC)
Länge15 mm
Breite15.75 mm
Höhe18.5 mm
MontageartTHT 
BauformEE13/6/6 
–Verfügbarkeit prüfen