# TC7340

**Shenzhen Fuman** · AC-DC Controllers & Regulators · DIP-8

TC7340 from Shenzhen Fuman, in a DIP-8. 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-G | power_in | Internal gate-driver supply terminal; the datasheet gives an absolute maximum input voltage of -0.3 V to 30 V and says gate drive strength can be tuned by a resistor between VDD and VDD-G. |
| 2 | VDD | power_in | Main supply pin, normally powered from the transformer auxiliary winding; it is rated -0.3 V to 30 V absolute maximum, clamps at 30.5 V typical at 10 mA, and enters UVLO at 8.4-10.4 V (on) and 14.2-16.2 V (off). |
| 3 | FB | input | Feedback input for the PWM duty-cycle control and overload detection; absolute maximum voltage is -0.3 V to 7 V, with 4.9 V typical open-circuit voltage and an overload threshold of 3.85 V. |
| 4 | SENSE | input | Current-sense input for peak-current limiting and cycle-by-cycle protection; absolute maximum voltage is -0.3 V to 7 V, with an overcurrent threshold of 0.77 V typical (0.72-0.82 V) and 40 kΩ input impedance. |
| 5 | DRAIN | output | Drain of the internal high-voltage power MOSFET; rated 650 V breakdown (absolute maximum drain voltage -0.3 V to 650 V), 2.2 Ω typical RDS(on), and 2 A peak drain current. |
| 6 | DRAIN | output | Drain of the internal high-voltage power MOSFET, bonded in parallel with pin 5; rated 650 V breakdown, 2.2 Ω typical RDS(on), and 2 A peak drain current. |
| 7 | GND | power_in | Ground reference pin for the controller. |
| 8 | GND | power_in | Ground reference pin for the controller, bonded in parallel with pin 7. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Fuman |
| Package | DIP-8 |
| Category | Power Management ICs |
| Pins | 8 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Built-in MOS drain voltage | VDrain | -0.3 |  | 650 | V |  | 3 |
| VDD input voltage | VDD | -0.3 |  | 30 | V |  | 3 |
| VDD-G input voltage | VVDD-G | -0.3 |  | 30 | V |  | 3 |
| VDD clamp continuous current | IDD |  |  | 10 | mA |  | 3 |
| FB input voltage | VFB | -0.3 |  | 7 | V |  | 3 |
| SENSE input voltage | VSENSE | -0.3 |  | 7 | V |  | 3 |
| Operating junction temperature (min/max) | TJ | -20 |  | 150 | ℃ |  | 3 |
| Storage temperature (min/max) | TSTG | -55 |  | 160 | ℃ |  | 3 |
| Soldering temperature | Tr |  |  | 260 | ℃ | soldering 10 s | 3 |
| Startup current | I_VDD_ST |  | 5 | 20 | uA | VDD=12.5V | 3 |
| UVLO turn-on threshold voltage | UVLO_ON | 8.4 | 9.4 | 10.4 | V |  | 3 |
| UVLO turn-off threshold voltage | UVLO_OFF | 14.2 | 15.2 | 16.2 | V |  | 3 |
| OVP_ON overvoltage protection threshold | OVP_ON | 26.8 | 28.3 | 29.8 | V | VDD=16VC,CS=0V, FB=3V; raise VDD until GATE off | 3 |
| FB open-circuit voltage | VFB_Open | 4.5 | 4.9 | 5.6 | V |  | 3 |
| Overload protection FB threshold voltage | VTH_PL |  | 3.85 |  | V |  | 3 |
| Current limit threshold | VTH_OC | 0.72 | 0.77 | 0.82 | V | FB=3.3V | 4 |
| Maximum duty cycle | D_max | 70 | 80 | 90 | % | FB=3.3V,CS=0V,VDD=16V | 4 |
| Frequency jitter range | Δf_OSC | -4 |  | 4 | % |  | 4 |
| Operating current | I_VDD_OP |  | 1.6 |  | mA | VDD=16V, VFB=3V | 3 |
| VDD clamp voltage | VDD_Clamp |  | 30.5 |  | V | IDD=10mA | 3 |
| FB short-circuit current | IFB_Short |  | 1.2 |  | mA |  | 3 |
| FB threshold voltage at zero duty cycle | VTH_0D |  | 0.8 |  | V | VDD=16V | 3 |
| Overload protection delay | TD_PL |  | 50 |  | ms |  | 3 |
| FB input impedance | ZFB_IN |  | 4 |  | KΩ |  | 3 |
| Leading-edge blanking time | T_blanking |  | 270 |  | ns |  | 4 |
| CS input impedance | Zsense |  | 40 |  | KΩ |  | 4 |
| Overcurrent detection to GATE off delay | TD_OC |  | 120 |  | ns | from overcurrent occurrence to GATE drive off | 4 |
| Soft-start time | T_ss |  | 4 |  | ms |  | 4 |
| Normal oscillation frequency | Fosc |  | 65 |  | KHz | VDD=16V | 4 |
| Temperature frequency stability | Δf_Temp |  | 5 |  | % | VDD=16V | 4 |
| VDD voltage frequency stability | Δf_VDD |  | 5 |  | % | INV=0V, CB=5V | 4 |
| Burst mode frequency | F_Burst |  | 22 |  | KHz | VDD=16V | 4 |
| MOS drain-source breakdown voltage | Vds |  | 650 |  | V |  | 4 |
| Static drain resistance | RDS(on) |  | 2.2 |  | Ω |  | 4 |
| Peak drain current | Idp |  | 2 |  | A |  | 4 |

## CAD (KiCad official)

- Symbol: `TC7340`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `tc7340-etched.step` / `tc7340-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tc7340.step` / `tc7340.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen Fuman datasheet](docs/tc7340-datasheet.pdf) (7 pp, sha256 `7bb5e1076045cfe2`, retrieved 2026-10-31, 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 0.3`, 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/tc7340-datasheet.pdf)