# TOP223YN

**POWER INTEGRATIONS** · AC-DC Controllers And Regulators · TO-220

TOP223YN from POWER INTEGRATIONS, in a TO-220. 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 | CONTROL | input | Error amplifier and feedback current input for duty-cycle control; it also provides the internal shunt regulator connection for bias during normal operation and is the connection point for the supply bypass and auto-restart/compensation capacitor. |
| 2 | SOURCE | power_in | Output MOSFET source connection for high-voltage power return and the primary-side circuit common and reference point; the tab is internally connected to this pin. |
| 3 | DRAIN | passive | Output MOSFET drain connection that provides start-up bias current through an internal switched high-voltage current source and serves as the internal current sense point. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | POWER INTEGRATIONS |
| Package | TO-220 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| DRAIN Voltage |  | -0.3 |  | 700 | V | All voltages referenced to SOURCE, TA = 25 °C | 10 |
| CONTROL Voltage |  | -0.3 |  | 9 | V | All voltages referenced to SOURCE, TA = 25 °C | 10 |
| CONTROL Current |  |  |  | 100 | mA |  | 10 |
| Storage Temperature |  | -65 |  | 150 | °C |  | 10 |
| Operating Junction Temperature |  | -40 |  | 150 | °C |  | 10 |
| Thermal Resistance Y Package, junction to ambient | θJA |  | 70 |  | °C/W | Free standing with no heat sink | 10 |
| Thermal Resistance Y Package, junction to case | θJC |  | 2 |  | °C/W | Measured at tab closest to plastic interface or SOURCE pin | 10 |
| Output Frequency | fOSC | 90 | 100 | 110 | kHz | IC = 4 mA, TJ = 25 °C | 10 |
| Maximum Duty Cycle | DMAX | 64 | 67 | 70 | % | IC = ICD1 + 0.4 mA, See Figure 10 | 10 |
| Minimum Duty Cycle | DMIN | 0.7 | 1.7 | 2.7 | % | IC = 10 mA, See Figure 10 | 10 |
| PWM Gain |  | -21 | -16 | -11 | %/mA |  | 10 |
| PWM Gain Temperature Drift |  |  | -0.05 |  | %/mA/°C |  | 10 |
| External Bias Current | IB | 0.8 | 2 | 3.3 | mA |  | 10 |
| Dynamic Impedance | ZC | 10 | 15 | 22 | Ω | See Figure 11 | 10 |
| Dynamic Impedance Temperature Drift |  |  | 0.18 |  | %/°C |  | 10 |
| CONTROL Pin Charging Current (VC = 0 V) | IC | -2.4 | -1.9 | -1.2 | mA | VC = 0 V, TJ = 25 °C | 10 |
| CONTROL Pin Charging Current (VC = 5 V) | IC | -2 | -1.5 | -0.8 | mA | VC = 5 V | 10 |
| CONTROL Pin Charging Current Temperature Drift |  |  | 0.4 |  | %/°C |  | 10 |
| Auto-restart Threshold Voltage |  |  | 5.7 |  | V |  | 11 |
| UV Lockout Threshold Voltage |  | 4.4 | 4.7 | 5 | V |  | 11 |
| Auto-restart Hysteresis Voltage |  | 0.6 | 1 | 1.2 | V |  | 11 |
| Auto-restart Duty Cycle |  | 2 | 5 | 9 | % |  | 11 |
| Auto-restart Frequency |  | 2 | 5 | 8 | Hz |  | 11 |
| Self-protection Current Limit (TOP223YN) | ILIMIT | 0.9 | 1 | 1.1 | A | di/dt = 160 mA/µs, TJ = 25 °C | 11 |
| Leading Edge Blanking Time | tLEB |  | 180 |  | ns |  | 11 |
| Current Limit Delay | tILD |  | 100 |  | ns | IC = 4 mA | 12 |
| Thermal Shutdown Temperature |  | 125 | 135 |  | °C |  | 12 |
| Power-up Reset Threshold Voltage | VC(RESET) | 2 | 3.3 | 4.3 | V | IC = 4 mA | 12 |
| ON-State Resistance (TJ = 25 °C) | RDS(ON) |  | 7.8 | 9 | Ω | TJ = 25 °C | 12 |
| ON-State Resistance (TJ = 100 °C) | RDS(ON) |  | 12.9 | 15 | Ω | ID = 100 mA, TJ = 100 °C | 12 |
| OFF-State Current | IDSS |  |  | 250 | µA | VDS = 560 V, TA = 125 °C | 12 |
| Breakdown Voltage | BVDSS | 700 |  |  | V | ID = 100 µA, TA = 25 °C | 12 |
| Rise Time | tR |  | 100 |  | ns | Measured in a Typical Flyback Converter Application | 12 |
| Fall Time | tF |  | 50 |  | ns | Measured in a Typical Flyback Converter Application | 12 |
| DRAIN Supply Voltage |  | 36 |  |  | V |  | 13 |
| Shunt Regulator Voltage | VC(SHUNT) | 5.5 | 5.7 | 6 | V |  | 13 |
| Shunt Regulator Temperature Drift |  | -50 |  | 50 | ppm/°C |  | 13 |
| CONTROL Supply/Discharge Current (ICD1) | ICD1 | 0.6 | 1.2 | 1.6 | mA |  | 13 |
| CONTROL Supply/Discharge Current (ICD2) | ICD2 | 0.7 | 1.4 | 1.8 | mA |  | 13 |
| CONTROL Supply/Discharge Current (unlabeled row) |  | 0.5 | 0.8 | 1.1 | mA |  | 13 |

## CAD (KiCad official)

- Symbol: `TOP223YN`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `top223yn-etched.step` / `top223yn-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `top223yn.step` / `top223yn.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [POWER INTEGRATIONS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886904233709568) (20 pp, sha256 `76d8469564658141`, retrieved 2026-10-19, 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/top223yn-datasheet.pdf)