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BP3309
BP3309 is BPSemi offline isolated flyback LED controller with single‑stage active PFC and primary‑side regulation. It runs in CRM critical‑conduction mode to lower switching loss and EMI noise. It removes optocoupler and secondary feedback circuit, realizing precise LED constant‑current output with ±3% accuracy.
Ultra‑low 20μA startup current and 600μA working current cut power consumption. Source‑drive architecture drives external power MOSFET. Built‑in comprehensive protections cover LED short/open, VCC OVP/UVP, cycle‑by‑cycle current‑limit and transformer saturation protection, all with auto‑recovery feature.
Wide 90‑277Vac input fits global mains grid. SOP‑8 small package adapts compact lamp shell design, mainly for 12‑40W LED bulbs, spotlights, PAR lamps and LED tube‑light power supplies. Hardware design should strictly follow datasheet reference circuit. Datasheet PDF is available for download.
Single‑stage Active PFC design, achieves high power factor and low total harmonic distortion(THD)
Primary‑Side Regulation (PSR) constant‑current control, no opto‑coupler and secondary feedback circuit required
±3% high‑precision LED output current accuracy
Critical conduction mode operation to reduce MOSFET switching loss
Source‑driver architecture lowers primary‑side power loss, ultra‑fast LED turn‑on (<200ms @85Vac)
Ultra‑low 20μA startup current and 600μA operating current for low power consumption
Excellent line and load regulation, line compensation adjustable via external components
Wide AC input range: 85Vac‑265Vac for global lighting applications
Comprehensive built‑in protection functions with auto‑recovery:
LED short‑circuit & open‑circuit protection
VCC over‑voltage / under‑voltage protection
CS resistor short & open protection
Cycle‑by‑cycle current limit, transformer saturation protection
Die over‑temperature protection
Surface‑mount SOP‑8 package, compact size for LED driver power boards
Item | Specifications |
|---|---|
Model | BP3309 |
Brand | BPSemi |
Package | SOP‑8 |
Topology | Single‑stage APFC PSR Flyback, CRM critical conduction mode |
Input Voltage | 90‑277V AC |
Output Current Accuracy | ±3% constant‑current precision |
Power Range | 12‑40W LED power supply |
Startup Current | 20μA ultra‑low startup current |
Operating Current | 600μA typical working current |
PF Value | PF＞0.9, low THD performance |
Drive Type | Source‑drive for external MOSFET |
Operating Temp | ‑40℃ ~ +105℃ |
Protection | LED short / open, OVP, UVP, cycle‑by‑cycle current limit, transformer saturation protection, auto‑recovery function |
Application | LED bulb, spotlight, PAR lamp, LED tube light, indoor lighting power supply |
Residential LED Lighting
Constant‑current driver for E27, GU10 LED bulbs and spotlights. High power‑factor performance meets global household lighting standards, ultra‑fast startup delivers instant‑on lighting effect。
Commercial Indoor Lighting
LED PAR30, PAR38 lamps and LED tube lights for offices, shopping malls and supermarkets. Low THD design improves power‑grid compatibility, ±3% precise current control ensures consistent LED brightness across mass‑produced luminaires。
Retrofit LED Lamp Modules
Cost‑effective isolated flyback power supply solution. No optocoupler required, reduces BOM count and PCB space for compact retrofit lamp assemblies。
General‑Purpose LED Downlight & Ceiling Lamp
Suitable for 85Vac‑265Vac universal AC input. Comprehensive built‑in protection including LED short‑circuit, open‑circuit and thermal shutdown enhances system reliability for continuous‑running indoor fixtures。
OEM LED Driver Power Boards
Mass‑production LED power modules for lighting manufacturers. Excellent line‑and‑load regulation adapts to various LED string configurations, supports auto‑recovery protection to lower after‑sales failure rate。
Global Export‑Oriented Lighting Products
Wide‑range AC input fits multi‑country mains voltage requirements. Single‑stage APFC satisfies international power‑factor regulations for lighting equipment.
