Starrystone Tech AC-DC Controllers

About AC-DC Controllers

High-efficiency PWM controllers and synchronous rectifiers for switching power supplies, adapters, and chargers.

As an authorized distributor of Starrystone Tech, BeiLuo provides a comprehensive range of AC-DC Controllers products. These products are widely used in industrial control, automotive electronics, consumer electronics, and communication equipment. We offer a complete product line with multiple series to meet various application requirements. All products are genuine and original, backed by professional technical support and comprehensive after-sales service.

Selection Guide: How to Choose the Right AC-DC Controllers

Product List

2 products available

Part Number ↕	Topology ↕	Integrated MOSFET ↕	Maximum Power ↕	Operating Frequency ↕	Standby Power ↕	Package ↕	Stock Status	Action
STR-A6069H	Flyback (Quasi-Resonant)	650V, 4A	Up to 30W	65kHz (typical)	< 75mW at 230VAC	DIP-8, SOP-8	In Stock	View Details
STR-SR3010	Flyback Synchronous Rectification	-	-	Up to 150kHz	< 10mW	SOT23-6, SOP-8	In Stock	View Details

Need AC-DC Controllers Products?

Download Datasheet Request Samples Get Quote Contact FAE

Frequently Asked Questions

What is the difference between STR-A and STR-SR series?

The STR-A series includes PWM controllers for primary-side power conversion, providing the main control function in flyback and forward converters. The STR-SR series consists of synchronous rectifier controllers for secondary-side operation, replacing diode rectifiers with MOSFETs to improve efficiency. STR-A controllers are used alone for basic designs or combined with STR-SR for high-efficiency applications. Both series work together to create complete high-efficiency power supply solutions.

Use STR-A for primary-side control. Add STR-SR for synchronous rectification to improve efficiency. Contact us for complete solution recommendations.

What protection features are integrated in Starrystone Tech controllers?

Starrystone Tech AC-DC controllers integrate comprehensive protection features including over-voltage protection (OVP), over-current protection (OCP), over-load protection (OLP), short-circuit protection (SCP), and over-temperature protection (OTP). These protections ensure safe operation under abnormal conditions and protect both the power supply and connected devices. The controllers also feature soft-start functionality to limit inrush current during startup.

The integrated protections simplify design and improve reliability. Review the datasheet for specific protection thresholds and characteristics.

How do I achieve high efficiency with Starrystone Tech controllers?

High efficiency can be achieved through several design choices: Use synchronous rectification (STR-SR series) instead of diode rectifiers to reduce conduction losses

Optimize transformer design for minimal losses

Select low-RDS(on) MOSFETs for primary and secondary switches

Implement proper snubber circuits to reduce switching losses

Use appropriate inductor and capacitor values

and Design for proper thermal management. Starrystone Tech reference designs demonstrate high-efficiency implementations.

Follow reference designs for high-efficiency implementations. Contact our FAE team for optimization guidance.

What is the maximum power supported by Starrystone Tech controllers?

Starrystone Tech AC-DC controllers support a wide power range depending on the specific model. Low-power controllers (STR-A1xx series) are suitable for applications up to 30W, such as mobile chargers. Medium-power controllers (STR-A3xx series) support up to 65W for laptop adapters. High-power controllers (STR-A5xx series) can handle 100W and above for high-power applications. The actual maximum power depends on the external power stage design and thermal management.

Select controller based on your power requirements. Contact us for specific model recommendations.

Do Starrystone Tech controllers support active PFC?

Some Starrystone Tech controller models include active Power Factor Correction (PFC) functionality for applications requiring high power factor and low harmonic distortion. These controllers are suitable for designs above 75W where PFC is typically required by regulations. The integrated PFC simplifies design by combining PFC and PWM control in a single IC. For applications not requiring PFC, standard controllers without PFC are available at lower cost.

Select PFC-enabled controllers for applications above 75W or where power factor requirements apply. Contact us for PFC controller options.