Small-batch LED dimming module BL-TRIAC: freeze the sample before quoting lead time
A request for a small-batch LED dimming module usually arrives with a wished ship date. The BL-TRIAC note has no lead-time row and no minimum quantity. BL-TRIAC is a Jarwey project module, not catalog stock. A date stays tied to the changes still open on that sample. It is not a warehouse promise.
What the project hands over for a custom design is a separate note: custom TRIAC dimmer module BL-TRIAC. Which layer of an imported quote the module does not replace is here: cost-effective TRIAC dimmer BL-TRIAC. How the phase-cut signal enters a CV or CC supply is here: leading and trailing edge on CV/CC supplies. Those tables stay in those notes. Choosing among 16kHz, 10kHz, and 1kHz is also outside this page. The sample sheet only circles one row.
What the sample freezes, and what the small batch may still change
The note allows a project change on four items: interface, dimming curve, PWM frequency, and leading/trailing sense logic. An OEM mark is frozen with that batch. The split below is only sample versus small batch.
| Stage | Write on the sheet | After it is frozen | Do not quote the date as |
|---|---|---|---|
| Sample | One load row only; full wall-control model; leading or trailing edge; default log curve or the project brightness points; high-voltage auxiliary or secondary supply; high-side PWM or direct MOS drive; sample quantity | Not yet a small batch. A firmware change or a frequency-row change retires this sample | The note has no “days to sample.” The window follows the changes on this build |
| Small batch | The same row confirmed on the sample: same load and PWM frequency, same SW sense logic, same curve, same PWM pin, same OEM mark | Interface, curve, PWM frequency, phase-cut sense, and OEM mark stay with that batch | A mid-batch row change or a nonstandard protocol does not keep the previous window |
Lead time is followed per project. Once the sample row is frozen, the small batch does not reopen the selection. That is not a fixed number of days. The note does not list one.
Numbers the sample sheet may copy
Copy only the figures in the BL-TRIAC note. Leave lead time, minimum quantity, and any unmarked resistor blank.
| Item | Min | Typ | Max |
|---|---|---|---|
| Supply voltage | 12V | 15V | 30V |
| Supply current | — | 5mA | 10mA |
| PWM duty | 0% | — | 100% |
| Dimming curve | Logarithmic by default; a project curve can be specified | ||
| Circle one row on the sample | Resistor | PWM frequency |
|---|---|---|
| Magnetic track, TRIAC output, constant voltage | R18 = 10kΩ | 10kHz |
| LED strip, TRIAC output, constant voltage | R19 = 10kΩ | 16kHz |
| Fixture, TRIAC output, constant current | Resistor not stated in the note | 1kHz |
Do not put two rows on one sample. Do not invent a resistor for the 1kHz constant-current row. The signal path in the note is RC filter, op-amp conditioning, MCU AD, dimming curve, then PWM, with soft-start at power-up. The note describes the light as fine, stable, smooth, and free of jitter.
Pin fields on the sample sheet
Pin names follow the note. ACL and VCC have no pin numbers. Do not assign one. SW and the high-side PWM output can be changed in firmware. A firmware change means this sample does not roll into the small batch.
| Pin | Name | Confirm on the sample |
|---|---|---|
| — | ACL | Supply input, line, after the fuse |
| 2 | ACN | Supply input, neutral |
| — | VCC | Module supply positive, high-voltage auxiliary |
| 4 | GND | Module supply negative, high-voltage GND |
| 5 | SW | Senses the TRIAC voltage and controls the leading/trailing circuit (function can be customized) |
| 6 | PWM | High-side PWM output (function can be customized) |
| 7 | AGND | Module supply negative, secondary AGND |
| 8 | VDD | Module supply positive, secondary VDD |
| 9 | DIMIN/PWM OUT | PWM output, direct MOS drive |
Write the full wall-control model. Models named in the note are for a joint check on the real board. They are not a drop-in replacement. A model that is absent from the note gets its own sample.
Checklist before the sample is released
- One load row. Magnetic-track CV (R18 = 10kΩ, 10kHz), strip CV (R19 = 10kΩ, 16kHz), or fixture CC (1kHz, resistor not stated). Do not merge rows on one sample.
- Full wall-control model. A joint check is not an unverified replacement. A model outside the note is a separate sample.
- Edge. Leading or trailing. Pin 5 SW can be customized. A nonstandard protocol is a new sample.
- Curve. Default log, or the project brightness points. The small batch keeps the curve frozen on the sample.
- Auxiliary rail. 12V min, 15V typ, 30V max; 5mA typ, 10mA max. State VCC/GND (high-voltage auxiliary) or pin 8 VDD / pin 7 AGND (secondary).
- PWM exit. Pin 6 high-side, or pin 9 direct to the MOSFET. Duty is 0% min and 100% max. One exit per batch.
- Quantity and window. State the sample quantity and the small-batch quantity. Do not fill in days or a minimum order the note does not give. A row change or a protocol change does not keep the previous window. Contact Jarwey for the datasheet.
Product page
- Product: BL-TRIAC multi-function TRIAC dimming module
- Note: BL-TRIAC Word note. For an updated copy, contact Jarwey.
Send Jarwey the load row, wall-control model, edge, curve, sample quantity, and small-batch quantity: kerry.w@jarwey.cn · Contact. Jarwey can run the sample, the small batch, and the project lead time.
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