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DK2649CB

Public Made by Adom

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Shenzhen DongKe Semicon AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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DK2649CB

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

DK2649CB 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 GND power_in Ground reference pin for the controller; the datasheet gives no electrical limit for this pin.
2 VDD power_in Supply pin with a stated AC-input operating range of 9 V to 34 V, UVLO turn-on at 7.0 to 8.4 V, and VDD overvoltage protection at 35 to 38 V.
3 FB input Feedback input with a 4.8 to 6.2 V open-loop voltage, where FB falling below 1.6 V enters skip (burst) mode and the short-circuit current is 0.24 mA.
4 CS input Current-sense input with an overcurrent threshold of 0.71 to 0.80 V, 270 ns leading-edge blanking and 40 kΩ input impedance, so no external RC filter is required.
5 DRAIN passive Drain of the internal 650 V power MOSFET (RDS(ON) 1.8 to 2 Ω); enlarge and tin the copper area for heat dissipation and keep at least 1.5 mm clearance from low-voltage parts.
6 DRAIN passive Drain of the internal 650 V power MOSFET (RDS(ON) 1.8 to 2 Ω); enlarge and tin the copper area for heat dissipation and keep at least 1.5 mm clearance from low-voltage parts.
7 DRAIN passive Drain of the internal 650 V power MOSFET (RDS(ON) 1.8 to 2 Ω); enlarge and tin the copper area for heat dissipation and keep at least 1.5 mm clearance from low-voltage parts.
8 DRAIN passive Drain of the internal 650 V power MOSFET (RDS(ON) 1.8 to 2 Ω); enlarge and tin the copper area for heat dissipation and keep at least 1.5 mm clearance from low-voltage parts.

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
功率管漏源电压 VDRAIN_MAX 650 700 V 3
VDD供电电压 VDD 40 V 3
IDD供电电流 IDD 10 mA 3
储存温度范围 TSTG -55 155 ℃ 3
结温 TJ 150 ℃ 3
焊接温度 TW 280 ℃ 5S 3
VDD工作电压 VDD 9 17 34 V AC 输入 85V-265V 3
启动电流 IDD_ST 5 20 uA VDD=11V，测试 VDD 端电流 3
工作电流 IOP 0.83 mA VDD=17V, VFB=3V, VCS=0V 3
欠压保护开启电压 Vuvlo(ON) 7 7.7 8.4 V VDD 下降至 IC 关闭 3
欠压保护关断电压 Vuvlo (OFF) 15.5 16 17 V VDD 上升至 IC 开启 3
跳频保护电压 VDD_ET 7.7 8.2 8.7 V FB=0V，CS=0V 3
过压保护 VOVP 35 35.7 38 V VDD=17V, VCS=0V, VFB=3V, VDD 上升直到 DRAIN 端频率消失 3
FB 开环电压 VFB_OPEN 4.8 5.55 6.2 V 3
FB 短路电流 IFB_SHORT 0.24 mA VDD=17V, FB 短路到地 3
绿色模式阈值 VTH_GREEN 2.2 V VDD=17V, VCS=0V, VFB=3V, FB 下降，当 DRAIN 端频率小于 35KHZ 时 3
跳频模式阈值 VTH_BM 1.6 V VDD=17V, FB 下降 3
前沿消隐时间 TLEB 270 ns 3
CS 脚输入阻抗 ZCS_IN 40 kΩ 3
CS 脚过流保护阈值 VTH_OC 0.71 0.77 0.8 V VDD=17V, VFB=3V, CS 上升至关断功率管 3
过流保护延迟时间 TD_OC 120 ns 从过流保护至功率管开始关断的延迟时间 3
振荡频率 FOSC 60 65 70 KHz VDD=17V, VFB=3V, VCS=0V 3
最大占空比 DMAX 65 70 85 % VDD=17V, VFB=3.3V, VCS=0V 3
跳频频率 FBURST 25 KHz 3
抖频范围 ΔFOSC -4 4 % 3
功率管导通内阻 RDS(ON) 1.8 2 Ω 3
过温保护 TOTP 150 ℃ 3

CAD (KiCad official)

  • Symbol: DK2649CB
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: dk2649cb-etched.step / dk2649cb-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); dk2649cb.step / dk2649cb.glb are the bare package body.

Provenance

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

  • Datasheet: Shenzhen DongKe Semicon datasheet (9 pp, sha256 272ea9fe50f29bf3, retrieved 2026-10-19, 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