IC-Hersteller Texas Instruments

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Texas Instruments UCC28730DR | Demoboard TIDA-01560

Zero Standby PSR Flyback Controller with CVCC and Wake-Up Monitoring

Details

TopologieSperrwandler
Eingangsspannung85-270 V
Schaltfrequenz90 kHz

Beschreibung

The UCC24650 is an easy-to-use secondary-side voltage monitor that periodically measures its own VDD voltage. A relative droop of 3% from the previous reading triggers a alert signal to a receiving primary-side regulation (PSR) controller. Its low-power consumption helps achieve <5-mW standby loss in many applications.An internal 200-V MOSFET switch is applied across a ground-referenced rectifier to provide a current-limited pulse to the flyback transformer secondary winding, which couples the signal to the primary-side controller. This signal is repeated at 33 kHz until controller-driven switching activity is detected.Relative-droop detection allows scaling to any voltage between 5 and 28 V. The alert function allows very-low standby frequency to minimize switching loss and reduction of output capacitance needed to respond to a heavy load step. This monitor is used with a controller capable of detecting the signal, such as the UCC28730 PSR flyback controller.The UCC24650 also provides an enable and disable signal which can be used to control a secondary-side circuit during no-load conditions to reduce standby power loss. Such a circuit may be a synchronous rectifier controller or a relay driver, for example.

Eigenschaften

  • Enables Excellent Load Transient Performance and Zero Standby Power
  • Enables Smallest Output Capacitor for Tight ΔVOUT
  • No External Components Required
  • <50 µA Device Current Consumption (Typical)
  • 5-V to 28-V Output Monitoring Capability
  • 3% Voltage Droop Detection (Patent Pending)
  • 200-V Wake-Up Switch
  • Enables and Disables SR Controller, Relay Control, or Other Secondary Circuits
  • SOT-23 5-Pin Package

Typische Anwendungen

  • Washing Machines / Coffee Machines / Cooking Ranges / Small Home Appliances / Disinfection Cabinets / Toilet Seat Covers / TV and Monitor Power Supplies

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads Status ProduktserieVinVOut1
(V)
IOut1
(A)
VOut2
(V)
IOut2
(A)
Vaux
(V)
fswitch
(kHz)
NPRI : NSEC : NAUXISAT
(A)
Bauformfres
(MHz)
VersionIR
(A)
L
(µH)
RDC max.
(mΩ)
VR
(V (AC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
Montageart Muster
750343769SPEC
5 Dateien Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.MID-OLTI Offline Flyback Transformers for Texas Instruments 85 - 265 V (AC) 12 1.125 3.3 0.3 12 50 16.8 : 2.4 : 1 : 2.4 EFD20 620 3000 21.5 29 12.4 THT
744821201SPEC
10 Dateien Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WE-CMB Stromkompensierte Netzdrossel XS THT 2 1000 45 250 1500 MnZn 15 7.8 18 THT
7447462471SPEC
8 Dateien Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WE-TI Tonneninduktivität 0.4 5075 3.4 Schrumpfschlauch 0.35 470 2400 6 6 8.5 THT
Artikel Nr. Daten­blatt Simu­lation
750343769SPEC
744821201SPEC
7447462471SPEC
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads Status ProduktserieVinVOut1
(V)
IOut1
(A)
VOut2
(V)
IOut2
(A)
Vaux
(V)
fswitch
(kHz)
NPRI : NSEC : NAUXISAT
(A)
Bauformfres
(MHz)
VersionIR
(A)
L
(µH)
RDC max.
(mΩ)
VR
(V (AC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
Montageart Muster