# SD6954A

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

SD6954A 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 (the datasheet lists it as 'GND' with I/O type G). |
| 2 | ISEN | input | Peak-current sense input: the sense-resistor voltage is compared with the 0.5 V heavy-load and 0.33 V light-load peak thresholds, and the absolute input voltage limit for this pin class is -0.3 V to 5.5 V. |
| 3 | VCC | power_in | Supply pin: start-up threshold 15.3 V typ (14.3-16.3 V), under-voltage lockout at 6.8 V typ (6.3-7.3 V), VCC overvoltage protection at 24 V typ (22.5-25.5 V), and absolute maximum rating -0.3 V to 26 V. |
| 4 | FB | input | Feedback input for output-voltage sensing, peak-current compensation and open-loop detection: absolute voltage range -30 V to 30 V, FB overvoltage protection at 6.5 V typ (6.2-6.8 V), and a negative level below -1.1 V indicates an open loop. |
| 5 | CDC | input | Output line-drop compensation pin: CDC above 1.4 V indicates heavy load (VPK1 = 0.5 V) and CDC below 0.8 V indicates light load (VPK2 = 0.33 V), and this variant uses 6% line-drop compensation. |
| 6 | Drain | output | Drain of the internal high-voltage power MOSFET; the datasheet gives RDS(ON) of 3.8 Ω typ and 4.8 Ω max at VGS = 10 V, ID = 1.25 A. |
| 7 | Drain | output | Drain of the internal high-voltage power MOSFET; the datasheet gives RDS(ON) of 3.8 Ω typ and 4.8 Ω max at VGS = 10 V, ID = 1.25 A. |
| 8 | Drain | output | Drain of the internal high-voltage power MOSFET; the datasheet gives RDS(ON) of 3.8 Ω typ and 4.8 Ω max at VGS = 10 V, ID = 1.25 A. |

## 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 |  | 26 | V |  | 3 |
| Internal supply voltage | VREF5V | -0.3 |  | 5.5 | V |  | 3 |
| FB input voltage | VFB | -30 |  | 30 | V |  | 3 |
| Other input voltage | VIN | -0.3 |  | 5.5 | V |  | 3 |
| Input current | IIN | -10 |  | 10 | mA |  | 3 |
| Operating junction temperature | TJ |  |  | 160 | °C |  | 3 |
| Operating ambient temperature range | Tamb | -20 |  | 85 | °C |  | 3 |
| Storage temperature range | TSTG | -40 |  | 125 | °C |  | 3 |
| ESD (human body model) | ESD |  |  | 2500 | V | human body model | 3 |
| Startup current | IST |  | 1 | 3 | µA | VCC=14V | 3 |
| Static operating current | IDD | 280 | 320 | 360 | µA | ISEN=0，FB=0 | 3 |
| Startup voltage | VST | 14.3 | 15.3 | 16.3 | V |  | 3 |
| Shutdown (UVLO) voltage | VSP | 6.3 | 6.8 | 7.3 | V |  | 3 |
| Internal supply voltage | VREF5V | 4.75 | 5 | 5.25 | V |  | 3 |
| VCC overvoltage protection voltage | VCCOVP | 22.5 | 24 | 25.5 | V |  | 3 |
| Enable turn-on voltage | VEN | 40 | 120 | 200 | mV |  | 3 |
| Open-loop protection voltage | VBLANK | -0.9 | -1.1 | -1.3 | V |  | 3 |
| Open-loop protection delay time | TBLANK | 0.8 | 1.2 | 1.6 | µS |  | 3 |
| Constant voltage threshold | VCV | 3.9 | 4 | 4.1 | V |  | 3 |
| FB overvoltage protection voltage | VFBOVP | 6.2 | 6.5 | 6.8 | V |  | 4 |
| Constant-voltage off-time limit (max) | TOFFmax | 4 | 4.5 | 5 | mS |  | 4 |
| Constant-voltage off-time limit (min) | TOFFmin | 0.6 | 0.8 | 1 | µS |  | 4 |
| Leading-edge blanking time | TLEB | 0.4 | 0.6 | 0.8 | µS |  | 4 |
| Constant-voltage loop max duty cycle | DSmax | 48 | 50 | 52 | % |  | 4 |
| Protection recovery time | TPRT | 30 | 35 | 40 | mS |  | 4 |
| Maximum on-time protection | TONmax | 20 | 25 | 30 | µS | ISEN=0V，FB=-2V | 4 |
| Peak current detection threshold 1 | VPK1 | 475 | 500 | 525 | mV | CDC>1.4V，重载，FB=-2V | 4 |
| Peak current detection threshold 2 | VPK2 | 315 | 330 | 345 | mV | CDC<0.8V，轻载，FB=-2V | 4 |
| Line-drop voltage compensation (SD6954A) | ΔFB/FB |  | 6 |  | % |  | 4 |
| Peak current compensation | ΔVPK | 40 | 50 | 60 | mV | CDC=5V，FB=-10V | 4 |
| Overtemperature protection threshold | TOTP | 135 | 145 | 155 | °C |  | 4 |
| Overtemperature protection hysteresis | TOTP_hys | 20 | 25 | 30 | °C |  | 4 |
| Static drain-source on-resistance | RDS(ON) |  | 3.8 | 4.8 | Ω | VGS=10V，ID=1.25A | 3 |
| Forward transconductance | Gfs | 1.5 |  |  | S | VDS=50V，ID=0.5A | 3 |

## CAD (KiCad official)

- Symbol: `SD6954A`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `sd6954a-etched.step` / `sd6954a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sd6954a.step` / `sd6954a.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/8588944672178126848) (8 pp, sha256 `2dd064ae9fa7a63c`, retrieved 2026-10-15, 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/sd6954a-datasheet.pdf)