中国电子技术网

设为首页 网站地图 加入收藏

 

[原创] TI UCC28056100W AC/DC参考设计TIDA-01623

关键词:电源管理 AC/DC转换器 PFC控制器 UCC28056

时间:2018-12-29 09:05:55       作者:TI       来源:中电网

TI公司的ucc28056是6引脚单相瞬态模式PFC控制器,集成了突发模式以进一步改善轻负载性能,使系统能满足最严格的能量标准而不需要关闭PFC,能驱动高达300W的PFC功率级,兼容IEC1000-3-2标准,超低无负载输入功率(115Vac为25mW,230Vac为本40mW),整个负载范围有极好的效率,低起动电流(<46 μA),宽VCC范围8.5V-34V,逐个周期限流,集成了超温保护,第二次单独输出电压保护,主要用在台式计算机/数字TV,游戏/机顶盒/AC适配器前端,LED驱动器和照明以及入门级服务器和网络服务器.本文介绍了UCC28056主要特性,框图和应用电路,以及30-W/吋3 93.4%效率100-W AC/DC适配器参考设计TIDA-01623主要特性和指标,电路图和材料清单.

The UCC28056 device drives PFC boost stagesbased on an innovative mixed mode method thatoperates in Transition mode (TM ) at full load andtransitions seamlessly into Discontinuous Conductionmode (DCM) at reduced load, automatically reducingswitching frequency. This device incorporates burstmode operation to further improve light loadperformance, enabling systems to meet challengingenergy standards while eliminating the need to switchoff the PFC. UCC28056 can drive a PFC power stageup to 300 W, ensuring sinusoidal line input currentwith low distortion, close to unity power factor whilekeeping the PFC ‘always on’. When used with theLLC controller UCC256301, this 6-pin deviceeliminates the need for an auxiliary fly backconverter, (typically needed in systems for goodstandby performance) while achieving less than 80mW at 230 Vac. The device also enables instant turnon while reducing external component count to aminimum.

The UCC28056 controller partners with the UCC256301 device to control a complete PFC and LLC isolated off-Line power supply system delivering more than 300 W. The combined power supply is designed to meet toughefficiency and standby power requirements without the need for an Auxiliary Flyback converter and with no needto switch off the PFC under light load conditions. It allows designers to meet modern green power standards witha simpler and cheaper power supply.

The controller contains a number of features designed to maximize operating efficiency across the entire rangeof Line and Load. A versatile CrM/DCM control algorithm allows UCC28056 to operate in transition mode at fullpower and then transition seamlessly into DCM at reduced load without compromising Line current harmonics orpower factor. The controller operates at maximum frequency (Transition mode) when delivering full load and thenautomatically reduce switching frequency, moving to DCM operation, when delivering reduced load for maximum
efficiency.

Light-load efficiency and standby power are further enhanced by transitioning automatically to a burst mode ofoperation when delivering less than 10% load. During the burst OFF periods, the controller powers down most ofits internal circuits to minimize controller power consumption.

The UCC28056 controller includes a comprehensive list of fault protection features such as cycle-by-cyclecurrent limit, over-current protection, dual independent output over-voltage protection, Line Brown-In, Overtemperatureprotection and supply undervoltage lockout (UVLO).

Quantised 7-level line voltage feed-forward ensures that the loop gain is almost independent of line voltage, toease design of the output voltage control loop. A non-linear error amplifier greatly improves the response to largesteps in load without compromising steady state Line current harmonics.

UCC28056主要特性:

1• Low Input Current Distortion and Near UnityPower Factor Down to 10% Load
– Enables Compliance to IEC1000-3-2
• Ultra-low No-load Input Power (25 mW at 115Vac,40 mW at 230 Vac)
• Excellent Efficiency Over Range Of Load
• Enables <60mW Standby Power at 115Vac and<80mW Standby Power at 230 Vac in PFC+LLCSystem
• Enables Compliance To Green Power StandardsWithout Disabling PFC
– EuP Lot 6 Tier 2, CoC Ver. 5 Tier 2, EnergyStar for computers Ver. 6.1, DOE Level VI
• Ultra-low Audible Noise Output
• Burst Mode With Soft-entry and Soft-exit Periods
• Enhanced EA, Responds Rapidly to Load StepsWithout Degrading Input Current Distortion
• Valley Synchronized Turn-on Requires No SecondWinding On The Boost Inductor
• User Adjustable Valley Delay
• Low Start-up Current Consumption (<46 μA)
• Wide VCC Range 8.5 V to 34 V
• Cycle-by-cycle Current Limit
• Second Independent Output Voltage Protection
• Integrated Over-temperature Protection
• Create a Custom Design Using the UCC28056Device With the WEBENCH® Power Designer

UCC28056应用:

• Desktop Computing / Digital TV
• Gaming / Set Top Box / AC Adapter Front End
• LED Drivers and Luminaries
• Entry-Level Server and Web Server

图1.UCC28056简化应用电路

图2.UCC28056功能框图

图3.UCC28056 165W预稳压器应用电路

30-W/吋3 93.4%效率100-W AC/DC适配器参考设计TIDA-01623

This fully-tested reference design is a high-efficiency,high-power-density, AC/DC adapter solution with awide input voltage range (100- to 240-V AC) for laptopadapters and smartphone charger applications. Thisdesign consists of a front-end transition-mode (TM)
power factor correction (PFC) circuit based on theUCC28056, followed by an active-clamp flyback forisolated DC/DC conversion based on the UCC28780.

100-W AC/DC适配器参考设计TIDA-01623主要特性:

• Wide operating input range: 100- to 240-VAC withfull power delivery over entire range
• High efficiency (93.4% peak value) with naturalcooling
• Configured as 5-V/5-A, 9-V/5-A, 15-V/5-A, 20-V/5-Aoutput
• Low standby power consumption (130 mW)
• Small size (70 mm × 42 mm × 16.5 mm)
• High power density (30 W/in3)

100-W AC/DC适配器参考设计TIDA-01623应用:

• Notebook PC Power Adapter
• Display Power Adapter
• Smartphone Wall Charger
• Any 100-W Adapter

图4.100-W AC/DC适配器参考设计TIDA-01623外形图

图5.参考设计TIDA-01623框图
参考设计TIDA-01623主要系统指标:



图6.参考设计TIDA-01623电路图(1)

图7.参考设计TIDA-01623电路图(2)

图8.参考设计TIDA-01623电路图(3)
参考设计TIDA-01623材料清单:




详情请见:
http://www.ti.com/lit/ds/symlink/ucc28056.pdf
http://www.ti.com/lit/ug/tiduds8/tiduds8.pdf
以及http://www.ti.com/lit/df/tidrxg9/tidrxg9.pdf
http://www.ti.com/lit/df/tidrxh0/tidrxh0.pdf
ucc28056.pdf
tiduds8.pdf
tidrxg9.pdf
tidrxh0.pdf

  • 分享到:

 

猜你喜欢