Inventronics IPKBL series typically utilizes a Single-Stage Flyback topology. This is chosen for high Power Factor Correction (PFC) and simplicity.
"IPKBL-SR 35W" is an internal development code. The retail motherboard is often sold as part of a complete system. Search for these alternate names: ipkbl-sr 35w schematic
[AC IN]
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[MOV] + [Fuse]
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[EMI Filter (CMC + X-Caps)]
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[Full Bridge Rectifier]
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[High Voltage DC Bus] ----> [Primary MOSFET]
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[Flyback Transformer] <---(Feedback via Opto)---+
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[Controller IC] <----[Aux Winding] |
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[VCC Supply] |
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+------------------------(Ground)-------------------------------------+
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[Schottky Diode]
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[Output Caps]
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[LED OUT +]
Note: Always disconnect mains power before servicing. High voltage capacitors can hold a lethal charge even after power is removed. Flyback Transformer (T1):
The IPKBL-SR often suffers from corrupted BIOS due to failed firmware updates. The schematic provides the SPI (Serial Peripheral Interface) header pinout—showing you exactly where to clip a CH341A programmer. It also highlights the ME (Management Engine) region, which is critical for 7th Gen Intel booting. Controller IC:
Model: IPKBL-SR-35W Topology: Single-Stage PFC Flyback (Boundary Conduction Mode) Application: Street Lighting / Industrial Lighting
If you are repairing or analyzing the IPKBL-SR-35W, you are likely dealing with a high-reliability driver designed for longevity. Here is a breakdown of the typical schematic sections and component placement for this series.
Armed with the inferred schematic, here is how to fix the most frequent issues: