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Richtek Newsletter
INTRODUCING HIGHLY INTEGRATED, LOW STANDBY POWER LED DRIVER SOLUTIONS FOR SMART LIGHTING APPLICATIONS
Richtek Newsletter   Nov. 29, 2018 | Newsletter Issue 30
 
Lighting is changing, as we are gradually moving from LED fixtures to fully embrace smart LED lighting systems, which are controllable with apps or even your voice. To achieve both benefits from energy and maintenance savings from smart lighting, Richtek has developed comprehensive highly integrated LED lighting solutions, featuring low standby power consumption and high precise dimming. Richtek provides LED lighting driver solutions for both domestic and commercial applications up to 150W, including AC/DC isolated solutions, AC/DC non-isolated solutions, DC/DC driver solutions and MR16 drivers. We also offer reference designs that allow designers to effectively incorporate product requirements to the end designs. Richtek Newsletter
 
Design example
 
❚ 40W single-stage dimmable isolated LED driver solution
RT7331 THE AC/DC PRIMARY-SIDE REGULATION(PSR) DIMMABLE FLYBACK LED DRIVER CONTROLLER WITH ACTIVE POWER FACTOR CORRECTION
 
40W single-stage dimmable isolated LED driver solution
 
In response to energy saving for smart lighting applications, the RT7331GS LED driver IC features Green Mode to reduce power consumption less than 0.3W in standby mode. Its unique control topology can support 1.5µA ultra-low quiescent current, and 0.5s fast start-up. The Smart Dimmable™ technology supports Analog/PWM input signals for precise brightness control, extending the dimming range from 1% to 100%, which makes it compatible with various applications, such as wireless dimming, 0-10V/DALI dimming, etc.

In addition, the RT7331GS has total harmonic distortion (THD) compensation to enable THD below 10% under the wide input range. Its smart CC/CV mode control can eliminate additional external power requirements for cost-effective designs. The Soft Drive control and comprehensive protections including Vac OVP/UVP, and system OTP/OVP/SCP simplify system designs while still meeting safety regulations.

 
   About RT7331     
 
❚ 40W flicker-free dimmable colour changeable isolated LED driver solution
RT7339 AC/DC ACTIVE-PFC CONSTANT-VOLTAGE CONTROLLER WITH PSR+RT8406 65V BUCK LED DRIVER WITH DIMMING CONTROL
 
40W flicker-free dimmable colour changeable isolated LED driver solution
 
The RT7339+RT8406 solution is designed for applications which require high-precision controls on colour changing and dimming, multi-channel output and less than 1% output current ripple. The unique control system offers 1%-100% wide dimming control and ensures consistency in low-brightness dimming for multi-channel output applications as well as in mass production.

Featuring 1.5µA quiescent current and less than 0.5s start-up time, the RT7339+RT8406 solution provides less than 0.2W standby power consumption and less than 10% THD to meet stringent system requirements. Along with the comprehensive protection functions, the RT7339+RT8406 solution simplifies system designs for less cost and shorter development time.

 
   About RT7339         About RT8406   
 
❚ 100W flicker-free dimmable isolated LED driver solution
RT7300AD PFC CONTROLLER WITH CRITICAL CONDUCTION + RT7331SGS PSR DIMMABLE LED DRIVER CONTROLLER WITH ACTIVE-PFC
 
100W flicker-free dimmable isolated LED driver solution
 
The RT7300AD+RT7331SGS solution is designed for applications which require up to 100W high power, less than 1% output current ripple and high-precise dimming control. The unique control system can reduce component size and cost while maintaining high performance. It solves the flickering problem at low brightness due to insufficient bandwidth. Featuring adjustable 1%-100% high precision output current control, the RT7300AD+RT7331SGS solution provides the Smart CC/CV mode to eliminate additional external power. The shutdown mode control also significantly reduces power consumption below 0.5W at standby mode. Furthermore, the newly added THD optimiser circuit reduces THD less than 10% under the wide input range.
 
 About RT7300AD       About RT7331SGS   
 
More system design examples
LED Lighting Selection guide
 
For more system design examples, please check the LED lighting application pages and download the latest LED lighting product selection guide. For product information, pricing and samples, please contact us.
 
  Contact us     Download Selection Guide
 
 
USB TYPE-C PD POWER SOLUTIONS
 
RT7791 and RT7202K  
For 45w adaptors in low-component-count, single-layer PCB designs
Richtek USB Power Delivery Type-C Adapter Solutions: RT7791 and RT7202K
   About RT7791        Find out more  
 
 
RT7752 and RT7207K  
For hight-efficient, high-power-density and cost-effective designs
Richtek USB Power Delivery Type-C Adapter Solutions: RT7752 and RT7207K
   About RT7752        Find out more  
 
 
NEW PRODUCTS
Check out the products that meet your area of interest for more information
 
RT1025 RT1025 is an integrated AFE solution for Heart-Rate monitoring and measurements. Richtek offers highly integrated RT1025 Cardioid PAD development platform including hardware and the exclusive Cardio EVK mobile APP, which can effectively help designers quickly develop products.

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  Design resources
  Buy from distributors

 
RT5112 RT5112 PMIC integrates a 1.2A low-quiescent-current HCOT Buck converter, a 1.0A, ACOT Boost converter and four 0.3A, high PSRR LDOs in a WL-CSP-25B 2.2x2.3 (BSC) package. Users can control the channel power sequence, output voltage level and DVS slew rate by setting registers via I2C interface. It is ideal for camera modules, optical modules and SSD.

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