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reference designUCC28780 | Demoboard TIDA01622

Texas Instruments UCC28780 | Demoboard TIDA01622

UCC28780 High Frequency Active Clamp Flyback Controller

Overview

TopologyFlyback Converter
Switching frequency1000 kHz
IC revision001

Description

UCC28780 is a high-frequency active-clamp flyback controller that enables high-density AC-to-DC power supplies that comply with stringent global efficiency standards such as DoE Level VI and EU CoC V5 Tier-2. User programmable advanced control law features allow performance to be optimized for both Silicon (Si) and Gallium Nitride (GaN) power FETs. Direct operation with switching devices that combine driver and GaN FETs is further enhanced with logiclevel gate signals and enable outputs.Zero voltage switching (ZVS) is achieved over a wide operating range with advanced auto-tuning techniques, adaptive dead-time optimization, and variable switching frequency control law. Using adaptive multimode control that changes the operation based on input and output conditions, UCC28780 enables high efficiency while mitigating audible noise. With a variable switching frequency of up to 1 MHz and accurate programmable over-power protection, which provides consistent power for thermal design across wide line range, the size of passive components can be further reduced and enable high power density.UCC28780 works with VDS-sensing synchronous rectifier controllers, such as UCC24612, to achieve higher conversion efficiency and very compact designs.

Features

  • Full and Partial Zero Voltage Switching (ZVS) of Primary FET with Adaptive Control
  • Programmable Timing for External Si or GaN FETs
  • High Switching Frequency up to 1 MHz
  • Programmable Adaptive Burst Control and Standby Mode for Light-Load Efficiency with Low Output Ripple and Audible Noise Mitigation
  • Brownout Detection without Direct Line Sensing
  • Accurate Programmable Over-Power Protection (OPP) to Support Peak Power Mode
  • Fault Protections: Over-Temperature, Output Over-Voltage, Output Short-Circuit, Over-Current, and Pin Fault
  • Direct Interface with Optocoupler Based Feedback Allows for Dynamically Scalable Output Voltage
  • Internal Soft Start
  • NTC Thermistor Interface with External Enable

Typical applications

  • High-Density AC-to-DC Adapters for Notebook, Tablet, TV, Set-Top Box and Printer / USB Power Delivery, Direct and Fast Mobile Chargers / AC-to-DC or DC-to-DC Auxiliary Power Supply

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
Application
C
Safety Class
dV/dt(V/µs)
DF @ 1 kHz(%)
RISO
Pitch(mm)
Packaging
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Qty.
Interface Type
Type
Gender
Pins
PCB Thickness(mm)
Working Voltage(V (DC))
IR(A)
L(mH)
RDC max.(mΩ)
VR(V (AC))
VT(V (AC))
Material
L(mm)
W(mm)
H(mm)
Mount
SamplesAvailability & Sample
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890324023023CS
SPECWCAP-FTX2 Film Capacitors, Across the mains, 100 nF
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-FTX2 Film Capacitors
ApplicationAcross the mains 
Capacitance100 nF
Safety ClassX2 
Rate of Voltage Rise300 V/µs
Dissipation Factor0.1 %
Insulation Resistance30 GΩ
Pitch10 mm
PackagingCarton 
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Packaging Unit1776 
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Rated Voltage275 V (AC)
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Length13 mm
Width7 mm
Height13 mm
MountBoxed THT 
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632723300011
SPECWR-USB Type C Connectors, USB 3.1, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation–
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-USB Type C Connectors
ApplicationUSB 3.1 
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Insulation Resistance1000 MΩ
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PackagingTape and Reel 
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Packaging Unit700 
Interface TypeType C 
TypeHorizontal 
GenderReceptacle 
Pins24 
PCB Thickness1.6 mm
Working Voltage48 V (DC)
Rated Current5 A
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MountTHR 
–Check availability
744822120
SPECWE-CMB Common Mode Power Line Choke, –, –
Simu­lation
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Downloads11 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CMB Common Mode Power Line Choke
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Packaging Unit140 
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Pins4 
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Rated Current0.5 A
Inductance20 mH
DC Resistance540 mΩ
Rated Voltage250 V (AC)
Insulation Test Voltage1500 V (AC)
MaterialMnZn 
Length17.5 mm
Width13 mm
Height22 mm
MountTHT 
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744316100
SPECWE-HCI SMT Flat Wire High Current Inductor, –, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
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Performance Rated Current14.8 A
Saturation Current @ 10%5.5 A
Saturation Current @ 30%11.5 A
DC Resistance4.75 mΩ
Self Resonant Frequency158 MHz
Packaging Unit1500 
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Pins2 
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Inductance0.001 mH
DC Resistance5.225 mΩ
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MaterialSuperflux 
Length5.5 mm
Width5.3 mm
Height4 mm
MountSMT 
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750343803
SPECTransformer, –, –
Simu­lation
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Downloads5 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product series Transformer
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PackagingTray 
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Inductance0.075 mH
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Insulation Test Voltage3750 V (AC)
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Length21.59 mm
Width21.59 mm
Height17.27 mm
MountTHT 
–Check availability