BP3319
High-performance isolated LED driver with active PFC and universal input for commercial lighting applications up to 60W
Product Overview
Description
The BP3319 is a high-performance isolated LED driver controller designed for commercial and industrial lighting applications. It features active power factor correction (PFC) achieving PF > 0.9 and low THD.
This controller supports flyback and buck-boost topologies with primary-side regulation, eliminating the need for optocoupler feedback. The integrated 650V MOSFET driver provides robust switching capability.
Advanced protection features include over-voltage protection, short-circuit protection, over-temperature protection, and input under-voltage lockout. The BP3319 meets international safety and EMC standards for commercial lighting.
Product Series
BP
Primary Application
Commercial downlights
Key Features
- Active power factor correction
- Primary-side regulation
- Universal AC input (90V-305V)
- Integrated 650V gate driver
- Low standby power <0.5W
- Comprehensive protection features
Specifications
| Input Voltage | 90V-305V AC |
|---|---|
| Output Power | Up to 60W |
| Power Factor | >0.9 |
| THD | <15% |
| Current Accuracy | ±3% |
| Switching Frequency | 65kHz |
| Topology | Flyback / Buck-boost |
| Package | SOP-16 |
Applications
Commercial downlights
Electronic system design
Panel lights
Electronic system design
High-bay lights
Electronic system design
Street lights
Electronic system design
Industrial lighting
Industrial automation and control
FAE Expert Insights
"The BP3319 is my go-to recommendation for commercial lighting applications requiring high PF and isolation. The primary-side regulation simplifies design by eliminating optocoupler and secondary feedback components, improving reliability and reducing cost. In my experience with multiple customer designs, the active PFC consistently achieves PF > 0.95 with proper inductor design. The wide input voltage range makes it suitable for global applications. I particularly appreciate the comprehensive protection features that ensure reliable operation in challenging commercial environments. For designs requiring dimming, the BP3319M variant offers excellent 0-10V dimming performance."
Excellent isolated driver with active PFC for commercial lighting
— David Wang, BeiLuo
Frequently Asked Questions
What is primary-side regulation (PSR) and how does it work?
Primary-side regulation eliminates the need for optocoupler and secondary-side feedback components by sensing output voltage through the auxiliary winding. The controller detects the reflected voltage during the transformer demagnetization period to regulate output current. This approach reduces component count, improves reliability, and lowers cost while maintaining good regulation accuracy (typically ±3%). PSR is particularly suitable for LED driver applications where cost and reliability are critical.
PSR is ideal for cost-sensitive isolated LED drivers. For higher accuracy requirements, consider secondary-side regulation.
How do I achieve high power factor with BP3319?
High power factor is achieved through active PFC using a boost converter stage before the main DC/DC converter. The BP3319 integrates PFC control functionality. Key design considerations include proper PFC inductor selection, output capacitor sizing, and compensation network design. The PFC stage operates in critical conduction mode (CRM) to achieve PF > 0.9 and THD < 15%. Follow BPSemi's reference design for optimal PFC performance.
Follow BPSemi reference designs for PFC implementation or contact LiTong for design review services.
What transformer design considerations apply to BP3319?
Transformer design for BP3319 requires careful consideration of turns ratio, magnetizing inductance, and winding configuration. The turns ratio affects output voltage range and MOSFET voltage stress. Magnetizing inductance determines switching frequency and current ripple. Use a transformer with proper isolation rating (typically 3000V or 3750V) and adequate creepage/clearance. BPSemi provides transformer design guidelines and can recommend qualified magnetic component suppliers.
Use BPSemi reference transformer specifications or contact LiTong for transformer design support.
Can BP3319 be used for outdoor lighting applications?
Yes, BP3319 can be used for outdoor lighting with proper thermal and environmental design. The wide input voltage range (90V-305V) accommodates global outdoor lighting requirements. For outdoor applications, ensure adequate IP rating (typically IP65 or higher) and thermal management. The comprehensive protection features including over-temperature protection ensure reliable operation in harsh outdoor environments. Consider surge protection and lightning protection for outdoor installations.
For outdoor lighting, verify IP rating and surge protection requirements. Contact LiTong for outdoor lighting design guidance.
What is the difference between BP3319 and BP3319M?
The BP3319M is a variant of BP3319 with added 0-10V analog dimming capability. Both share the same core PFC and PSR functionality, but BP3319M includes additional dimming interface circuitry. The dimming range is typically 1% to 100% with good linearity. BP3319 is suitable for non-dimming applications, while BP3319M is recommended for commercial lighting with dimming requirements. Both use the same SOP-16 package and have similar electrical characteristics.
Choose BP3319 for non-dimming, BP3319M for 0-10V dimming applications. Contact LiTong for dimming solution guidance.