WELL-05 · Wellness Electronics
Thermoelectric Hot-and-Cold Eye Massager PCBA
A representative thermoelectric platform for controlled heating and cooling with reversible high-current drive, dual-point temperature sensing, heat-side supervision, and condensation-aware operation.
Project context
How this product is typically engineered
A representative thermoelectric platform for controlled heating and cooling with reversible high-current drive, dual-point temperature sensing, heat-side supervision, and condensation-aware operation.
System architecture
Typical architecture
A battery or negotiated external supply feeds a bidirectional TEC power stage; an MCU regulates current from skin-side and heat-side temperature feedback and coordinates the fan or cooling path, UI, and optional wireless functions.
Engineering risks to resolve
Decisions to close before release
- Remove heat from the TEC hot side while meeting skin-side temperature and noise targets.
- Reverse current without bridge shoot-through or abrupt temperature changes.
- Manage condensation and sensor disagreement in a humid wearable environment.
Validation plan
Checks to define before production
- Map skin-side and heat-side temperature, current, ramp rate, steady state, and battery life across ambient conditions.
- Inject blocked airflow, fan stall, sensor open or short, drive overcurrent, and rapid mode-change faults.
- Perform high-humidity condensation, corrosion, drainage, and repeated hot-cold cycling tests.
What to put in the RFQ
Files and records to agree before quoting
Use this list to agree the build inputs and release records for a similar product. The final set depends on the project.
Design baseline
Released schematic or block diagram, interface table, power states, critical constraints, and revision owner.
Manufacturing release
Gerber or ODB++, stack-up, centroid data, assembly drawings, approved DFM dispositions, and panel assumptions.
Material control
Released BOM revision, manufacturer part numbers, AVL or alternate rules, no-substitute lines, MSL handling, and exception approvals.
Validation record
Test method, acceptance criteria, sample or serial identity, measured result fields, and disposition. Example scope: Map skin-side and heat-side temperature, current, ramp rate, steady state, and battery life across ambient conditions.
Production release
First-article status plus the agreed SPI, AOI, X-ray, ICT, FCT, programming, rework, OQA, labeling, and packing records.
During RFQ review, we confirm the required fields, sampling, limits, approvals, and record-retention period. Confidential project information stays within the agreed access rules.
Development and production controls
Typical manufacturing scope
- Bidirectional TEC power control.
- Dual-temperature thermal supervision.
- Condensation-aware operating states.
Technical image review
Board-level evidence
White-background views are published to make component placement, interfaces and assembly boundaries easier to inspect.
