component
UCC3817DWTR
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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UCC3817DWTR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-16-300mil
UCC3817DWTR 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, and 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 input with a threshold of 0 V, where peak limit is reached when the voltage falls below 0 V, and the absolute maximum input voltage is 5 V. |
| 3 | CAOUT | output | Output of the 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, which remains functional down to and below GND, with an absolute maximum input voltage of 8 V. |
| 5 | MOUT | bidirectional | Multiplier output and inverting current amplifier input, a high-impedance node whose multiplier output current is limited to 2 × IIAC, with a maximum negative voltage of -0.5 V. |
| 6 | IAC | input | Current input proportional to instantaneous line voltage to the analog multiplier, with a recommended maximum IIAC of 500 µA. |
| 7 | VAOUT | output | Output of the voltage error amplifier that regulates output voltage, internally limited to approximately 5.5 V to prevent overshoot. |
| 8 | VFF | input | Feed-forward voltage generated by mirroring 1/2 of IIAC into an external single-pole filter, which should be 1.4 V at low line. |
| 9 | VREF | power_in | Output of an accurate 7.5-V voltage reference capable of delivering 20 mA, internally short-circuit current limited, and held at 0 V when VCC is below the UVLO threshold, with a 0.1-µF or larger bypass capacitor recommended. |
| 10 | OVP/EN | input | Window comparator input that disables the output driver on boost overvoltage and disables the driver and resets SS when pulled below 1.9 V (typ), with an absolute maximum input voltage of 10 V. |
| 11 | VSENSE | input | Inverting input of the voltage error amplifier, normally connected to a compensation network and to the boost output through a divider, with an absolute maximum input voltage of 10 V. |
| 12 | RT | input | Oscillator charging current programming pin, where a resistor between 10 kΩ and 100 kΩ is recommended and the nominal voltage on the pin is 3 V. |
| 13 | SS | input | Soft-start pin that is charged by a current source into an external capacitor to slowly increase PWM duty cycle, is discharged when VCC is low, and has an absolute maximum input voltage of 8 V. |
| 14 | CT | input | Oscillator timing capacitor connection where a capacitor from CT to GND sets the PWM frequency according to f ≈ 0.6/(RT × CT), with the lead to GND kept as short as possible. |
| 15 | VCC | power_in | Positive supply that must provide at least 20 mA between 10 V and 17 V for normal operation, with an absolute maximum supply voltage of 18 V. |
| 16 | DRVOUT | output | Totem-pole MOSFET gate drive output for the boost switch, where a series gate resistor is recommended to limit overshoot, with a continuous gate drive current of 0.2 A and a peak of 1.2 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Power Management (PMIC) |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
UCC3817DWTR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files:
ucc3817dwtr-etched.step/ucc3817dwtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc3817dwtr.step/ucc3817dwtr.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 2026-10-12, 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).
# UCC3817DWTR
**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-16-300mil
UCC3817DWTR 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, and 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 input with a threshold of 0 V, where peak limit is reached when the voltage falls below 0 V, and the absolute maximum input voltage is 5 V. |
| 3 | CAOUT | output | Output of the 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, which remains functional down to and below GND, with an absolute maximum input voltage of 8 V. |
| 5 | MOUT | bidirectional | Multiplier output and inverting current amplifier input, a high-impedance node whose multiplier output current is limited to 2 × IIAC, with a maximum negative voltage of -0.5 V. |
| 6 | IAC | input | Current input proportional to instantaneous line voltage to the analog multiplier, with a recommended maximum IIAC of 500 µA. |
| 7 | VAOUT | output | Output of the voltage error amplifier that regulates output voltage, internally limited to approximately 5.5 V to prevent overshoot. |
| 8 | VFF | input | Feed-forward voltage generated by mirroring 1/2 of IIAC into an external single-pole filter, which should be 1.4 V at low line. |
| 9 | VREF | power_in | Output of an accurate 7.5-V voltage reference capable of delivering 20 mA, internally short-circuit current limited, and held at 0 V when VCC is below the UVLO threshold, with a 0.1-µF or larger bypass capacitor recommended. |
| 10 | OVP/EN | input | Window comparator input that disables the output driver on boost overvoltage and disables the driver and resets SS when pulled below 1.9 V (typ), with an absolute maximum input voltage of 10 V. |
| 11 | VSENSE | input | Inverting input of the voltage error amplifier, normally connected to a compensation network and to the boost output through a divider, with an absolute maximum input voltage of 10 V. |
| 12 | RT | input | Oscillator charging current programming pin, where a resistor between 10 kΩ and 100 kΩ is recommended and the nominal voltage on the pin is 3 V. |
| 13 | SS | input | Soft-start pin that is charged by a current source into an external capacitor to slowly increase PWM duty cycle, is discharged when VCC is low, and has an absolute maximum input voltage of 8 V. |
| 14 | CT | input | Oscillator timing capacitor connection where a capacitor from CT to GND sets the PWM frequency according to f ≈ 0.6/(RT × CT), with the lead to GND kept as short as possible. |
| 15 | VCC | power_in | Positive supply that must provide at least 20 mA between 10 V and 17 V for normal operation, with an absolute maximum supply voltage of 18 V. |
| 16 | DRVOUT | output | Totem-pole MOSFET gate drive output for the boost switch, where a series gate resistor is recommended to limit overshoot, with a continuous gate drive current of 0.2 A and a peak of 1.2 A. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Power Management (PMIC) |
| Pins | 16 |
## CAD (KiCad official)
- Symbol: `UCC3817DWTR`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files: `ucc3817dwtr-etched.step` / `ucc3817dwtr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc3817dwtr.step` / `ucc3817dwtr.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 2026-10-12, 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/ucc3817dwtr-datasheet.pdf)