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TIDA-00709
36W, Universal Input, >90% Efficiency, Dual Output Aux Supply Ref Design for PSU
TIDA-00709
Overview
TIDA-00709 is a 36-W dual-output auxiliary power supply with provision to accept both wide ranges of DC and AC inputs. Based on the input, this reference design can be used as an adapter or auxiliary power supply designed for use in power converters targeted for server, telecom and industrial system applications. This reference design is a quasi-resonant (QR) flyback converter implemented using UCC28740 constant voltage-constant current (CV-CC) flyback controller with optocoupled feedback for voltage and primary-side regulation (PSR) for current. For improved efficiency, TIDA-00709 uses synchronous rectification with sync controller UCC24636 and low RDS(on) MOSFET for main 12- V_ISO/2.75-A output. Hardware is designed and tested to pass conducted emissions, surge and EFT requirements. Additionally, the design has a built-in eFuse for multiple fault isolation for main output rail without affecting any other output.
Features
- High efficiency of > 90% with AC input and > 92% with DC input
- Minimum efficiency > 86.5% at 10% load aids to meet 80Plus titanium standard of server PSUs
- Low standby power (≈ 120 mW) aids to meet NoLoad condition limits of DoE Level VI and EU CoC Tier-I
- Compact form-factor to achieve high-power density solutions: – DC/DC: 40 mm × 45 mm – AC/DC: 70 mm × 45 mm
- Dual output: 12 V/0.25 A and 12 V_ISO/2.75 A
Industrial
- Air conditioner outdoor unit
- Analog-controlled AC/DC adapter
- Application Processor Module
- Data concentrator
- Digital controlled industrial AC/DC
- Digital-controlled BBU
- Digital-controlled telecom rectifier
- Drone accessories
- Industrial battery chargers
- Medical PSU
- Merchant DIN rail power supply
- Motor protection relay & contactors
- Open rack server PSU
- Power supply module
- Server PSU with 12V output
- Server PSU with 54V output
- Single phase line interactive UPS
- Single phase online UPS
- Wireless battery pack chargers
Personal electronics
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDUC68A.PDF (2621 K)
Reference design overview and verified performance test data
TIDROE3.PDF (251 K)
Detailed schematic diagram for design layout and components
TIDROE4A.PDF (135 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDROE5.PDF (91 K)
Detailed overview of design layout for component placement
TIDROE7.ZIP (4004 K)
Files used for 3D models or 2D drawings of IC components
TIDCCU1.ZIP (253 K)
Design file that contains information on physical board layer of design PCB
TIDROE6.PDF (379 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
MOSFETs
CSD19531Q5A — 100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 6.4 mOhm
Data sheet: PDF | HTMLStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | 36W, Universal Input, >90% Efficiency, Dual Output Aux Supply Ref Design for PSU (Rev. A) | Feb. 06, 2017 | |
| Application note | Designing with the ATL431LI | Nov. 27, 2018 | ||
| More literature | Snubbing the flyback converter | Nov. 07, 2016 | ||
| Application note | Seminar 900 Topic 2 - Snubber Circuits: Theory, Design and Application | Feb. 15, 2001 |
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