component
UCC2818DW
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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UCC2818DW
Texas Instruments · AC-DC Controllers And Regulators · SOIC-16-300mil
UCC2818DW from Texas Instruments, in a SOIC-16-300mil. 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 | GND | power_in | Ground reference for all voltages; VCC and VREF should be bypassed directly to GND with a 0.1-µF or larger ceramic capacitor. |
| 2 | PKLMT | input | PFC peak current limit threshold is 0 V, reached when PKLMT falls below 0 V, with an absolute maximum input voltage of 5 V and maximum input current of 10 mA. |
| 3 | CAOUT | output | Output of a wide-bandwidth current amplifier that commands the PFC PWM duty cycle, with compensation components placed between CAOUT and MOUT. |
| 4 | CAI | input | Noninverting input of the current amplifier, connected through a resistor to the GND side of the current sense resistor, remaining functional down to and below GND, with an absolute maximum input voltage of 8 V. |
| 5 | MOUT | bidirectional | Multiplier output and current amplifier inverting input, with the multiplier output current limited to 2 × IIAC and an absolute maximum input voltage of 8 V and minimum voltage of −0.5 V. |
| 6 | IAC | input | Input current proportional to instantaneous line voltage for the analog multiplier, with a recommended maximum IIAC of 500 µA and an absolute maximum input current of 10 mA. |
| 7 | VAOUT | output | Voltage amplifier output that regulates output voltage, internally limited to approximately 5.5 V to prevent overshoot. |
| 8 | VFF | input | Feed-forward voltage, the RMS signal produced by mirroring one-half of IIAC into a single-pole external filter, which should be 1.4 V at low line. |
| 9 | VREF | power_out | Output of an accurate 7.5-V reference capable of delivering 20 mA to peripheral circuitry, internally short-circuit current-limited, and held at 0 V when VCC is below the UVLO threshold; bypass with 0.1 µF or larger. |
| 10 | OVP/EN | input | Window comparator input that disables the output driver on output overvoltage, and disables the driver and resets SS when pulled below 1.9 V (typical), with an absolute maximum input voltage of 10 V. |
| 11 | VSENSE | input | Voltage amplifier inverting input, normally connected to a compensation network and to the boost output through a divider, with an absolute maximum input voltage of 10 V and recommended sense voltage of 7.5 V to 10 V. |
| 12 | RT | input | Oscillator charging current programming pin, where a resistor between 10 kΩ and 100 kΩ to GND is recommended, with a nominal voltage of 3 V on this pin. |
| 13 | SS | input | Soft-start pin charged by a current source to slowly increase the PWM duty cycle during start-up, discharged when VCC is low, with an absolute maximum input voltage of 8 V. |
| 14 | CT | input | Oscillator timing capacitor connected to GND, setting the PWM oscillator frequency as f ≈ 0.6/(RT × CT), with its lead to GND kept as short and direct as possible. |
| 15 | VCC | power_in | Positive supply, to be connected to a stable source of at least 20 mA between 10 V and 17 V for normal operation, with an absolute maximum supply voltage of 18 V and bypassed directly to GND. |
| 16 | DRVOUT | output | Totem-pole gate drive output for the boost switch, which should use a series gate resistor to limit overshoot, with absolute maximum gate drive current of 1.2 A and 0.2 A continuous. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Power Management (PMIC) |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
UCC2818DW - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files:
ucc2818dw-etched.step/ucc2818dw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc2818dw.step/ucc2818dw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (46 pp, sha256
ca94b4ec262a1f44, retrieved 2026-10-10, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).
# UCC2818DW
**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-16-300mil
UCC2818DW from Texas Instruments, in a SOIC-16-300mil. 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 | GND | power_in | Ground reference for all voltages; VCC and VREF should be bypassed directly to GND with a 0.1-µF or larger ceramic capacitor. |
| 2 | PKLMT | input | PFC peak current limit threshold is 0 V, reached when PKLMT falls below 0 V, with an absolute maximum input voltage of 5 V and maximum input current of 10 mA. |
| 3 | CAOUT | output | Output of a wide-bandwidth current amplifier that commands the PFC PWM duty cycle, with compensation components placed between CAOUT and MOUT. |
| 4 | CAI | input | Noninverting input of the current amplifier, connected through a resistor to the GND side of the current sense resistor, remaining functional down to and below GND, with an absolute maximum input voltage of 8 V. |
| 5 | MOUT | bidirectional | Multiplier output and current amplifier inverting input, with the multiplier output current limited to 2 × IIAC and an absolute maximum input voltage of 8 V and minimum voltage of −0.5 V. |
| 6 | IAC | input | Input current proportional to instantaneous line voltage for the analog multiplier, with a recommended maximum IIAC of 500 µA and an absolute maximum input current of 10 mA. |
| 7 | VAOUT | output | Voltage amplifier output that regulates output voltage, internally limited to approximately 5.5 V to prevent overshoot. |
| 8 | VFF | input | Feed-forward voltage, the RMS signal produced by mirroring one-half of IIAC into a single-pole external filter, which should be 1.4 V at low line. |
| 9 | VREF | power_out | Output of an accurate 7.5-V reference capable of delivering 20 mA to peripheral circuitry, internally short-circuit current-limited, and held at 0 V when VCC is below the UVLO threshold; bypass with 0.1 µF or larger. |
| 10 | OVP/EN | input | Window comparator input that disables the output driver on output overvoltage, and disables the driver and resets SS when pulled below 1.9 V (typical), with an absolute maximum input voltage of 10 V. |
| 11 | VSENSE | input | Voltage amplifier inverting input, normally connected to a compensation network and to the boost output through a divider, with an absolute maximum input voltage of 10 V and recommended sense voltage of 7.5 V to 10 V. |
| 12 | RT | input | Oscillator charging current programming pin, where a resistor between 10 kΩ and 100 kΩ to GND is recommended, with a nominal voltage of 3 V on this pin. |
| 13 | SS | input | Soft-start pin charged by a current source to slowly increase the PWM duty cycle during start-up, discharged when VCC is low, with an absolute maximum input voltage of 8 V. |
| 14 | CT | input | Oscillator timing capacitor connected to GND, setting the PWM oscillator frequency as f ≈ 0.6/(RT × CT), with its lead to GND kept as short and direct as possible. |
| 15 | VCC | power_in | Positive supply, to be connected to a stable source of at least 20 mA between 10 V and 17 V for normal operation, with an absolute maximum supply voltage of 18 V and bypassed directly to GND. |
| 16 | DRVOUT | output | Totem-pole gate drive output for the boost switch, which should use a series gate resistor to limit overshoot, with absolute maximum gate drive current of 1.2 A and 0.2 A continuous. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Power Management (PMIC) |
| Pins | 16 |
## CAD (KiCad official)
- Symbol: `UCC2818DW`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files: `ucc2818dw-etched.step` / `ucc2818dw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc2818dw.step` / `ucc2818dw.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ucc2818) (46 pp, sha256 `ca94b4ec262a1f44`, retrieved 2026-10-10, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (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).
[Datasheet PDF](docs/ucc2818dw-datasheet.pdf)