36W LED Panel Light Driver Solution

Application

Description

High-efficiency isolated LED driver using OB2263 with high power factor and low THD

Core Advantages

High power factor >0.9 meeting commercial lighting requirements

Low THD <20% for compliance with IEC61000-3-2

Isolated design for safety in indoor lighting applications

Constant current output with tight regulation

Compact design suitable for slim panel fixtures

Recommended Bill of Materials (BOM)

Item	Part Number	Description	Quantity	Datasheet
1	OB2263	PWM controller for flyback LED driver	1	📄 Download
2	OB3338	Active PFC controller for high power factor	1	📄 Download
3	Current Sense Resistors	Precision resistors for current regulation	2	📄 Download

Applications

LED Panel Lights

LED Downlights

LED Troffers

Technical Specifications

Input Voltage

180V - 264V AC

Output Voltage

25-40V DC

Output Current

900mA constant current

Output Power

36W

Power Factor

> 0.9

T H D

< 20%

Efficiency

> 88%

Customer Success Stories

LED Lighting Manufacturing |

Challenge

Needed cost-effective LED driver for 36W panel lights with high PF and low THD

Solution

Implemented OB2263-based flyback driver with active PFC front end

Results

Achieved PF>0.95, THD<15%, efficiency 89%, passed all EMC and safety certifications

Commercial Lighting |

Challenge

Required flicker-free LED driver for office lighting applications

Solution

Optimized output filter design for low ripple current in OB2263 driver

Results

Output ripple <3%, no visible flicker, passed IEC TR 61547-1 flicker tests

FAE Expert Insights

Senior FAE

Applications Engineer

10+ years

Professional Insights

This LED driver solution addresses the key requirements for commercial lighting: high power factor, low THD, and reliable constant current regulation. The two-stage design (PFC + flyback) ensures compliance with IEC61000-3-2 harmonic limits while maintaining good efficiency. For LED applications, output current regulation is critical - use precision current sense resistors (1% tolerance) and keep the feedback loop compensation stable. The transformer design should minimize leakage inductance to reduce voltage spikes and EMI. For thermal management, ensure adequate copper area for the primary MOSFET and output rectifier. I recommend using an aluminum electrolytic capacitor with high ripple current rating and 105°C temperature rating for the output filter to ensure long lifetime in the enclosed fixture environment.

Key Takeaways

Optimized for target applications
Integrated design reduces BOM cost
Comprehensive technical support available

Decision Framework

Steps:

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Frequently Asked Questions

What is the power factor and THD of this LED driver?

With the active PFC stage, the design achieves power factor >0.9 and THD <20%, meeting IEC61000-3-2 Class C requirements for lighting equipment. Actual performance depends on line voltage and load conditions.

Verify PF and THD at worst-case conditions; design margin ensures compliance across operating range.

How is constant current regulation achieved?

Constant current is achieved through primary-side regulation using current sense resistor and OB2263's internal control loop. The design maintains tight current regulation (<±3%) across input voltage and temperature variations.

Use precision current sense resistors (1% tolerance) for accurate regulation; verify over operating range.

What is the expected lifetime of this LED driver?

Driver lifetime depends on capacitor selection and operating temperature. With quality 105°C rated capacitors and proper thermal design, expected lifetime is >50,000 hours at 75°C ambient (L70 lifetime).

Use high-temperature rated capacitors; ensure adequate thermal management for long lifetime.

Can this driver be dimmed?

The base design supports 0-10V analog dimming with additional circuitry. PWM dimming and TRIAC dimming are also possible with appropriate interface circuits. Contact On-Bright for specific dimming application support.

Specify dimming requirements when selecting driver; additional circuitry may be needed for specific dimming protocols.

What protections are included in the LED driver?

The driver includes LED open-circuit protection, LED short-circuit protection, over-voltage protection, over-temperature protection, and input under-voltage protection. These ensure safe operation under fault conditions.

Verify all required protections for your application; additional protection may be needed for specific requirements.