component
UCC28742DBVR
Public Unreviewedby Ray
Texas Instruments AC-DC Controllers and Regulators, SOT-23-6. 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
markdownUCC28742DBVR
Texas Instruments · AC-DC Controllers and Regulators · SOT-23-6
UCC28742DBVR from Texas Instruments, in a SOT-23-6. 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 | FB | input | Feedback input that receives a current signal from the optocoupler output transistor. An internal current mirror divides the feedback current and applies it to an internal pullup resistor to generate the control voltage VCL, which drives the control law setting switching frequency and peak switching current amplitude. |
| 2 | VDD | power_in | Bias supply input pin. Recommended operating range 9 V to 35 V (absolute max 38 V). Requires a carefully placed bypass capacitor to GND, typically 0.047 µF to 10 µF. |
| 3 | DRV | output | Gate-drive output for driving an external high-voltage MOSFET switching transistor. Clamped gate drive with continuous sink capability 50 mA and source capability 15 mA (peak currents self-limiting). |
| 4 | CS | input | Current-sense input connecting to a ground-referenced current-sense resistor in series with the power switch. Monitors and controls the peak primary current; a series resistor at this pin compensates the peak current threshold for AC-mains input variation. Max CS threshold typically 770 mV, min 190 mV. |
| 5 | GND | power_in | Ground reference for the controller and low-side return for the gate drive output. All AC-decoupling capacitors should return as close as possible to this pin, kept separated from analog signal-return paths. |
| 6 | VS | input | Voltage-sense input providing demagnetization timing feedback for switching-frequency limiting, constant-current control, and output over-voltage detection. Also used for AC-mains input-voltage detection for peak-primary-current compensation via a voltage divider between the auxiliary winding and GND; the upper divider resistor sets AC-mains run/stop thresholds and line compensation at CS. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-6 |
| Category | PMIC |
| Pins | 6 |
Ordering variants
Same part, different packaging or reel option.
UCC28742DBVRUCC28742DBVRDBVT
CAD (KiCad official)
- Symbol:
UCC28742DBVR - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (44 pp, sha256
574431a3eed7cac3, 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).