# SD6834

**Hangzhou Silan Microelectronics** · AC-DC Controllers And Regulators · DIP-8

SD6834 from Hangzhou Silan Microelectronics, 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 | GND | power_in | Ground reference pin for the controller circuit. |
| 2 | CS | input | Peak current sense input where an external sense resistor sets the limit (I_PK = 0.9 / R_CS), with CS voltage rated from -0.3 V to 2 V and overcurrent protection triggered at 1.7 V. |
| 3 | VCC | power_in | Positive supply input that starts the IC at 15.5 V typical, shuts down below 8.3 V typical, and has an overvoltage protection point of 24.5 V typical with VCC rated to 28 V maximum. |
| 4 | FB | bidirectional | Feedback input with a voltage rating of -0.3 V to 7 V that drives burst-mode thresholds of 0.50 V and 0.35 V and triggers overload shutdown at 4.3 V typical after the feedback shutdown delay. |
| 5 | NC | unconnected | No-connection pin (空脚); the datasheet recommends tying it to the Drain pins to aid heat dissipation. |
| 6 | Drain | output | Drain of the internal power MOSFET switch, which is rated for 650 V BVDSS minimum. |
| 7 | Drain | output | Drain of the internal power MOSFET switch, which is rated for 650 V BVDSS minimum. |
| 8 | Drain | output | Drain of the internal power MOSFET switch, which is rated for 650 V BVDSS minimum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Hangzhou Silan Microelectronics |
| Package | DIP-8 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-source breakdown voltage | BVDSS | 650 |  |  | V | VGS=0V，ID=50μA | 3 |
| Zero gate voltage drain current | IDSS |  |  | 50 | μA | VDS=650V，VGS=0V | 3 |
| Zero gate voltage drain current (high temperature) | IDSS |  |  | 200 | μA | VDS=480V，VGS=0V Tamb=125°C | 3 |
| Startup voltage | VSTART | 14.5 | 15.5 | 16.5 | V |  | 3 |
| Shutdown voltage | VSTOP | 7.5 | 8.3 | 9 | V |  | 3 |
| Maximum oscillation frequency | fOSCMAX | 61 | 67 | 73 | KHz | VFB=3V | 3 |
| Minimum oscillation frequency | fOSCMIN | 20 | 25 | 30 | KHz | VBURL<VFB<VBURH | 3 |
| Maximum frequency jitter | fMOD | 1.5 | 2.5 | 3.5 | KHz | 振荡频率最大 | 3 |
| Frequency variation with temperature |  |  | 5 | 10 | % | 25°C≤Tamb≤+85°C | 3 |
| Maximum duty cycle | DMAX | 72 | 77 | 82 | % |  | 3 |
| Maximum feedback source current | IFBMAX | 0.8 | 0.9 | 1 | mA | VFB=0V，RADJ=0 | 3 |
| Feedback shutdown voltage (overload protection) | VSD | 3.8 | 4.3 | 4.8 | V |  | 3 |
| Feedback shutdown delay time | TSD | 15 |  | 40 | ms | FB 从 0V 瞬间上升至 5V | 3 |
| Shutdown delay current | IDELAY | 3 | 5.5 | 8 | μA | VFB=5V | 3 |
| Peak current limit | IOVER | 1.1 | 1.2 | 1.3 | A | 最大电感电流 | 3 |
| Burst mode high level FB voltage | VBURH | 0.4 | 0.5 | 0.6 | V | FB 电压 | 3 |
| Burst mode low level FB voltage | VBURL | 0.25 | 0.35 | 0.45 | V | FB 电压 | 3 |
| Overvoltage protection | VOVP | 23 | 24.5 | 26 | V | VCC电压 | 3 |
| Overtemperature protection | TOTP | 125 | 150 |  | °C |  | 3 |
| Overtemperature recovery | TOTU | 80 | 100 | 120 | °C |  | 4 |
| Leading edge blanking time | TLEB | 300 | 500 |  | ns |  | 4 |
| Startup current | ISTART |  | 3 | 10 | μA | VCC从 0V 上升至 12V | 4 |
| Static current | ISTATIC | 1 | 1.9 | 3 | mA | VFB=0V | 4 |
| Operating current | IOP | 1.2 | 2.2 | 3.2 | mA | VFB=3V | 4 |
| Drain-gate voltage | VDGR |  |  | 650 | V | RGS=1MΩ | 2 |
| Gate-source (ground) voltage | VGS | -30 |  | 30 | V |  | 2 |
| Drain pulse current | IDM |  |  | 10 | A |  | 2 |
| Drain continuous current | ID |  |  | 2.5 | A | Tamb=25°C | 2 |
| Single pulse avalanche energy | EAS |  |  | 140 | mJ | L=51mH, TJ=25°C(起始) | 2 |
| Supply voltage | VCC,MAX |  |  | 28 | V |  | 2 |
| Feedback input voltage | VFB | -0.3 |  | 7 | V |  | 2 |
| Peak current sense voltage | VCS | -0.3 |  | 2 | V |  | 2 |
| Total power dissipation | PD |  |  | 1.5 | W |  | 2 |
| Operating junction temperature | TJ |  |  | 150 | °C |  | 2 |
| Operating temperature range | TORG | -25 |  | 85 | °C |  | 2 |
| Storage temperature range | TSTG | -55 |  | 150 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `SD6834`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `sd6834-etched.step` / `sd6834-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sd6834.step` / `sd6834.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Hangzhou Silan Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893690315591680) (8 pp, sha256 `c38c9a4ae9a5d1a1`, retrieved 2026-10-16, 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/sd6834-datasheet.pdf)