component
UCC28740QDRQ1
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-7. Pinout cross-checked by two models against the datasheet, 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
markdownUCC28740QDRQ1
Texas Instruments · AC-DC Controllers And Regulators · SOIC-7
UCC28740QDRQ1 from Texas Instruments, in a SOIC-7. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Bias-supply input to controller with operating range 9 V to 35 V, UVLO turn-on threshold 21 V, turn-off threshold 7.75 V, and requirement for 0.047 µF bypass capacitor to GND. |
| 2 | VS | power_in | Voltage-sense input connected to auxiliary-winding voltage divider for demagnetization timing feedback, constant-current control, and overvoltage detection with voltage range from −0.75 V to 7 V. |
| 3 | FB | input | Feedback input receiving current signal from optocoupler output transistor with internal 2.5× current divider applied to generate control-law voltage, maximum current ±1.2 mA, and maximum voltage 7 V. |
| 4 | GND | power_in | Ground reference pin for controller analog circuitry and low-side return for gate-drive output requiring close placement to VDD bypass capacitor with short traces to minimize noise. |
| 5 | CS | input | Current-sense input connected to ground-referenced current-sense resistor for peak primary-current monitoring with voltage range −0.5 V to 5 V and thresholds 194 mV minimum to 773 mV maximum. |
| 6 | DRV | output | Gate-drive output for external high-voltage MOSFET with output voltage limited to 14 V, source current 25 mA, continuous sink current 50 mA, and internal leading-edge blanking of 230 ns. |
| 8 | HV | input | High-voltage startup pin rated to 700 V for charging VDD capacitor with startup current of 250 µA typical and run-state leakage current of 0.5 µA maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-7 |
| Category | Power Management (PMIC) |
| Pins | 7 |
CAD (KiCad official)
- Symbol:
UCC28740QDRQ1 - Footprint:
Package_SO:SOIC-8-N7_3.9x4.9mm_P1.27mm - 3D model: SOIC-7 (KiCad packages3D, STEP)
- 3D model files:
ucc28740qdrq1-etched.step/ucc28740qdrq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc28740qdrq1.step/ucc28740qdrq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (41 pp, sha256
325f33333919d922, retrieved 2026-09-26, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).