TLP5772 1812TB Logic Output Optoisolator Push-Pull CMTI 6-SOP

TLP5772 1812TB Logic Output Optoisolator | Compact 6-SOP with Faraday Shield

The TLP5772 (silk marking 1812TB) is a logic-output optoisolator in the 6-SOP package — a compact infrared LED + high-gain photodetector pair with integrated Faraday shield. 50% smaller than traditional 8-pin DIP optoisolators while still meeting reinforced-insulation safety standards.

Headline specs: 5000Vrms isolation voltage, 35kV/µs common-mode transient immunity (CMTI), push-pull output stage, low threshold input current (direct-drive from microcontroller without external buffer). The Faraday shield is what enables the high CMTI rating — critical for electrically noisy environments like PSU control circuits adjacent to switching MOSFETs.

When You Need the TLP5772

• PSU feedback loop opto degraded — output regulation drifting from set point.
• Isolated control signal stuck — opto output not following input drive.
• Visible damage on the 6-SOP package — burnt or cracked.
• CMTI failure — opto trips spurious states on every PSU switching transient.

TLP5772 1812TB Specifications

FAQ — TLP5772 Optoisolator

Q: 5000Vrms isolation — what does that mean for PSU repair?
A: 5000Vrms is the voltage the opto can withstand between input and output sides without breakdown. This isolation barrier is what allows the optoisolator to bridge primary and secondary sides of an SMPS while protecting low-voltage feedback circuits from primary-side high voltage.

Q: CMTI 35kV/µs — when does it matter?
A: Whenever the optoisolator sits next to a fast-switching MOSFET. PSU switching transients can produce hundreds of kV/µs slewing on the primary side; a low-CMTI opto produces spurious output transitions that confuse the feedback controller. 35kV/µs is comfortably high for modern PSU designs.

Q: Rework profile?
A: Hot air at 320°C with flux paste. 6-SOP is small (4×4mm body) and the internal LED is sensitive to overtemperature — keep peak below 250°C and limit dwell time.

Q: Bulk pricing?
A: Yes — email contact@lys-sz.com for tape-and-reel quantities.

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• NSi8100N Isolator Chip (APW17 PSU)
• NSI6602B Isolated Gate Driver

PSU repair benches stocking TLP5772 optoisolators in volume? Email contact@lys-sz.com for tape-and-reel pricing. Worldwide shipping from our Shenzhen warehouse.