# DK910

**Shenzhen DongKe Semicon** · AC-DC Controllers And Regulators · SOP-8

DK910 from Shenzhen DongKe Semicon, in a SOP-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 | IS | input | External resistor to GND sets the maximum primary peak current (Ip = 400 mV / Ris); the IS open-on voltage is 400 mV maximum and 160 mV minimum at VDD = 5 V. |
| 2 | GND | power_in | Ground pin for the controller. |
| 3 | FB | input | Primary-side feedback pin that senses the reflected output voltage for constant-voltage regulation (2.5 V internal reference) and constant-current control; FB above 3.8 V triggers open-loop protection and FB below 1.2 V for more than 32 ms triggers short-circuit protection. |
| 4 | VCC | power_in | Supply pin for the IC; connect a 10 uF to 47 uF capacitor to GND, with operating voltage 4.3 V to 5.5 V and VCC overvoltage protection at 6.0 V to 6.6 V. |
| 5 | OC | output | Drain of the internal 700 V high-voltage power MOSFET; the drain is rated 700 V minimum at Ioc = 1 mA, and the absolute pin voltage limit is -0.3 V to 730 V. |
| 6 | OC | output | Drain of the internal 700 V high-voltage power MOSFET; the drain is rated 700 V minimum at Ioc = 1 mA, and the absolute pin voltage limit is -0.3 V to 730 V. |
| 7 | OC | output | Drain of the internal 700 V high-voltage power MOSFET; the drain is rated 700 V minimum at Ioc = 1 mA, and the absolute pin voltage limit is -0.3 V to 730 V. |
| 8 | OC | output | Drain of the internal 700 V high-voltage power MOSFET; the drain is rated 700 V minimum at Ioc = 1 mA, and the absolute pin voltage limit is -0.3 V to 730 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen DongKe Semicon |
| Package | SOP-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 |
|---|---|---|---|---|---|---|---|
| 供电电压 VCC (supply voltage) | US | -0.3 |  | 8 | V |  | 3 |
| 供电电流 VCC (supply current) | IS |  |  | 100 | mA |  | 3 |
| 引脚电压 (pin voltage) | UPV | -0.3 |  |  | V | Max printed as VCC+0.3 | 3 |
| 耐压 (pin withstand voltage) | UPP | -0.3 |  | 730 | V |  | 3 |
| 峰值电流 (peak current) | IPEAK |  |  | 900 | mA |  | 3 |
| 总耗散功率 (total power dissipation) | PTOT |  |  | 800 | mW |  | 3 |
| 工作温度范围 (operating temperature range) | TR | -25 |  | 135 | ℃ |  | 3 |
| 储存温度范围 (storage temperature range) | TSTG | -55 |  | 150 | ℃ |  | 3 |
| 焊接温度 (soldering temperature) | TW |  |  | 280 | ℃ | 5S | 3 |
| VCC 工作电压 (VCC operating voltage) | VCC | 4.3 | 5 | 5.5 | V | AC input 85V-265V | 3 |
| VCC 启动电压 (VCC start voltage) | VCC | 4.7 | 5.3 | 5.8 | V | AC input 85V-265V | 3 |
| VCC 重启电压 (VCC restart voltage) | VCC | 3.1 | 3.5 | 3.9 | V | AC input 85V-265V | 3 |
| VCC 保护电压 (VCC protection voltage) | VCC | 6 | 6.3 | 6.6 | V | AC input 85V-265V | 3 |
| VCC 工作电流 (VCC operating current) |  |  |  | 100 | mA | VDD=5V, FB=2V | 3 |
| 高压启动电流 (high-voltage start current) |  | 0.5 |  |  | mA | AC input 265V | 3 |
| 启动时间 (start-up time) |  |  |  | 500 | ms | AC input 85V | 3 |
| 功率管耐压 (power transistor breakdown voltage) |  | 700 |  |  | V | Ioc=1mA | 3 |
| IS 最大开通电压 (IS maximum turn-on voltage) |  |  |  | 400 | mV | VDD=5V | 3 |
| IS 最小开通电压 (IS minimum turn-on voltage) |  |  |  | 160 | mV | VDD=5V | 3 |
| 恒压基准电压 (constant-voltage reference) |  | 2.45 | 2.5 | 2.55 | V | VDD=5V | 3 |
| 功率管最大电流 (power transistor maximum current) |  |  |  | 800 | mA | VDD=5V | 3 |
| 工作频率 (operating frequency) |  | 16 | 65 | 80 | KHz | VDD=5V | 3 |
| 短路保护阀值 (short-circuit protection threshold) |  |  |  | 1.2 | V | VDD=5V, measured FB voltage | 3 |
| 开路保护电压 (open-circuit protection voltage) |  |  |  | 3.8 | V | VDD=5V, measured FB voltage | 3 |
| 温度保护 (thermal protection) |  | 135 | 145 | 155 | ℃ | VDD=5V | 3 |
| 最小开通时间 (minimum on-time) |  |  |  | 500 | ns | VCC=5V | 3 |

## CAD (KiCad official)

- Symbol: `DK910`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `dk910-etched.step` / `dk910-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dk910.step` / `dk910.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen DongKe Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590230896935526400) (8 pp, sha256 `25574aaedb9360d8`, retrieved 2026-10-20, 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/dk910-datasheet.pdf)