PN8328 Overview
The Chipown PN8328 is a fully integrated primary-side regulation (PSR) LED driver IC that embeds a high-precision constant-current controller and a 650V high-avalanche-capability power MOSFET within a single DIP-8 package. Designed specifically for isolated dual-winding small-to-medium power LED lighting, the PN8328 operates in primary-side feedback mode — eliminating the optocoupler and TL431 voltage reference that secondary-side regulated designs require — reducing component count, PCB area, and total system cost significantly.
Chipown’s proprietary fast DMOS self-supply technology enables the PN8328 to power its internal controller directly from the drain waveform without a dedicated transformer auxiliary winding or high-voltage start-up resistor, further streamlining the transformer design and reducing winding complexity. An integrated line voltage compensation circuit — with 0.5% compensation accuracy — actively corrects output current variation across the full 90VAC to 265VAC universal input range, while an integrated primary inductance compensation circuit maintains regulation accuracy over transformer production tolerances. Together, these features deliver a headline ±3% constant current accuracy, supporting consistent LED luminous flux and colour temperature in production.
The PN8328 provides a comprehensive suite of auto-recovery protection functions, including cycle-by-cycle overcurrent protection (OCP), over-temperature control (OTC), LED open/short-circuit protection, proprietary CS resistor open/short-circuit protection, and open-loop protection — all with safe auto-recovery to maximise end-product reliability and lifetime. Output constant current and power are adjustable through the Rs resistor connected to the CS pin, giving designers flexible luminous flux targeting without circuit redesign.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | PN8328 |
| Manufacturer | Chipown |
| Package | DIP-8 |
| Topology | Primary-Side Regulation (PSR) Flyback |
| AC Input Voltage Range | 90VAC to 265VAC (universal input) |
| Integrated MOSFET Voltage Rating | 650V (high avalanche capability) |
| Constant Current Accuracy | ±3% |
| Line Voltage Compensation Accuracy | 0.5% |
| Output Current Adjustment | Via Rs resistor on CS pin |
| Feedback Method | Primary-side regulation — no optocoupler or TL431 required |
| Self-Supply Method | Fast DMOS self-supply — no auxiliary winding required |
| Operating Temperature Range | −40°C to +150°C |
| Protection Features | OCP, OTC, OLP, LED open/short, CS resistor open/short, auto-recovery |
Applications
The Chipown PN8328 is optimised for isolated constant-current LED lighting power conversion across a wide range of indoor and commercial luminaire categories. Typical applications include LED flat panel lights, LED panel external power supplies, LED downlights and troffer replacements, commercial LED retrofit lamps, LED ceiling light modules, decorative LED strip power supplies, and small-to-medium wattage LED driver units used in residential and light commercial building installations.
Pin-to-Pin Compatible Alternatives
Replacing incumbent primary-side LED driver ICs with the Chipown PN8328 enables lighting manufacturers to reduce BOM cost and reduce supply chain dependency on a single vendor without requiring transformer redesign or PCB re-layout.
| Reference Part Number | Original Manufacturer | Why Choose PN8328 |
|---|---|---|
| TNY268P | Power Integrations | Lower unit cost; integrated PSR eliminates optocoupler and TL431 for reduced BOM |
| NCP1014 | onsemi | Compatible self-supply architecture; no auxiliary winding reduces transformer complexity |
| STR-A6251 | Sanken | DIP-8 footprint match; ±3% CC accuracy meets or exceeds reference design performance |
| LNK306P | Power Integrations | Primary-side regulation equivalent; 0.5% line compensation delivers tighter output current across universal AC input |
| ICL8001G | Infineon | Cost-optimised PSR LED driver alternative with equivalent comprehensive auto-recovery protection suite |
Frequently Asked Questions
Is PN8328 RoHS compliant?
Yes. The Chipown PN8328 is manufactured in compliance with the RoHS Directive (2011/65/EU) and its amendment (EU) 2015/863, restricting hazardous substances including lead, mercury, cadmium, and hexavalent chromium. Full compliance documentation and material declarations are available on request through ABL Semi.
What are the pin-to-pin replacements for PN8328?
The PN8328 is a functionally equivalent, cost-effective alternative to a number of established primary-side LED driver ICs in DIP-8 format, including the Power Integrations TNY268P and LNK306P, onsemi NCP1014, Sanken STR-A6251, and Infineon ICL8001G. See the pin-to-pin compatibility table above for specific substitution guidance and design advantages for each reference part.
What is the minimum order quantity (MOQ) for PN8328?
ABL Semi offers flexible MOQ for the PN8328, supporting both prototype quantities and mass production orders. Contact us for current stock levels and pricing.
What package options are available for PN8328?
The PN8328 is available in a DIP-8 (Dual In-line Package, 8-pin) through-hole format. This package is well suited to designs requiring hand-soldering capability, socketed prototyping, or through-hole assembly processes common in LED lighting power supply manufacturing. If a surface-mount variant is required for your application, contact ABL Semi to discuss alternative packaging options within the Chipown PN83xx product family.
How does primary-side regulation in the PN8328 benefit LED lighting designs compared to secondary-side control?
In a conventional secondary-side regulated LED driver, an optocoupler and TL431 shunt reference are required to feed back output voltage or current information across the isolation barrier to the primary-side controller — adding component cost, PCB area, and potential reliability weak points. The Chipown PN8328 uses primary-side regulation (PSR), inferring output current directly from primary winding signals without crossing the isolation barrier. This eliminates the optocoupler and TL431 entirely, reducing BOM cost, simplifying PCB layout, and removing two failure-prone components from the signal chain. Combined with Chipown’s integrated line voltage compensation and primary inductance compensation circuits, the PN8328 maintains ±3% constant current accuracy across the full 90VAC to 265VAC input range — without the secondary-side feedback circuitry that traditional designs depend on.
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