component
UCC28810DR
Public Unreviewedby Ray
Texas Instruments LED Drivers, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownUCC28810DR
Texas Instruments · LED Drivers · SOIC-8
UCC28810DR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VSENSE | input | Inverting input to the internal transconductance error amplifier (nominal 2.5 V reference) and input to the OVP comparator. Pulling VSENSE below the ENABLE threshold (~0.67 V) shuts off switching, providing external disable and feedback-fault protection. Typically driven from an output-voltage divider. |
| 2 | EAOUT | output | Output of the transconductance error amplifier (10 uA nominal, up to ~1 mA when VSENSE exceeds 2.5 V) and one of the inputs to the current reference generator (dynamic input range 2.5 V to 4.0 V). Also the zero-power comparator input: when EAOUT falls below ~2.3 V the gate drive is inhibited. Loop compensation is connected between this pin and GND, or directly to the opto-coupler collector in isolated designs. |
| 3 | VINS | input | Senses the instantaneous rectified line input voltage via an external voltage divider and feeds the current reference generator. Recommended operating range 0 V to 3.8 V at high line. |
| 4 | ISENSE | input | Senses the instantaneous switch current across an external sense resistor and forms the internal ramp for the current-sense comparator; a small internal noise filter is provided and an external R-C filter may be added. An internal clamp on the current reference generator output terminates the switching cycle when V(ISENSE) exceeds ~1.7 V. A 75-mV offset is added internally to minimize zero-crossing distortion. Threshold approx. V_ISENSE = 0.67 x (V_EAOUT - 2.5 V) x (V_VINS + 75 mV). |
| 5 | TZE | input | Transformer zero-energy detect input. Detects when the inductor current has fallen to zero (rising threshold ~1.25 V, hysteresis ~350 mV) via a bias winding; internal active clamps protect against negative or excessive voltages (I_TZE = +/-3 mA typ, 5-6 V high clamp, 0.3-0.9 V low clamp). If zero energy is not detected within ~400 us, a restart timer forces the gate drive high. |
| 6 | GND | power_in | Device reference ground. All bypassing components should be returned to this pin with the shortest possible traces. |
| 7 | GDRV | output | Totem-pole gate-drive output for the external power FET in flyback, buck, or boost topologies. Delivers up to +/-750 mA peak during turn-on and turn-off; an external gate resistor may be needed to limit peak current versus VDD. The output is held low below the UVLO threshold. |
| 8 | VDD | power_in | Bias supply for the device (internally shunt-clamped at ~19 V, absolute max 20 V). Bypass with at least 0.1 uF to GND with the shortest possible traces. UCC28810 turn-on threshold is typ. 15.8 V with 6.3 V UVLO hysteresis (allows a smaller VDD hold-up cap and faster start-up). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | LED Drivers |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
UCC28810DRDUCC28810DR
CAD (KiCad official)
- Symbol:
UCC28810DR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (36 pp, sha256
4f8ba6dc38f5596d, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).