# SL2044

**Slkor(SLKORMICRO Elec.)** · Power Management Specialized - PMIC · SOP-14

SL2044 from Slkor(SLKORMICRO Elec.), in a SOP-14. 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 | OSC | passive | Oscillator pin of the RC timing network (R1, C1) that sets the flash frequency per formula 5.1, with R1 from 6.8kΩ to 180kΩ and C1 up to 47µF. |
| 2 | SIL | input | Left turn start input; grounding it (via pull-down R4) disables the left indicator, and closing the left switch changes the internal comparator state to drive outputs on pins 11 and 13. |
| 3 | SIR | input | Right turn start input; grounding it (via pull-down R5) disables the right indicator, and closing the right switch changes the internal comparator state to drive outputs on pins 11 and 13. |
| 4 | SIHW | input | Hazard warning start input, active low; when the hazard switch closes both turn indicators flash at the frequency set by formula 5.1, independent of the ignition state. |
| 5 | VS | power_in | Battery supply input that powers the fault-detection comparator on pin 8 and may be connected directly to the external battery; absolute maximum 24 V for 1 minute with pins 5, 9 and 12. |
| 6 | CR1 | input | Relay 1 feedback input that monitors the left indicator operating state and also enables the oscillator. |
| 7 | CR2 | input | Relay 2 feedback input that monitors the right indicator operating state and also enables the oscillator. |
| 8 | LD | input | Lamp fault detection input that senses indicator current across external shunt Rs against an internal 81 mV comparator reference, doubling the flash rate on a lamp failure. |
| 9 | VS | power_in | Supply pin for the oscillator, comparators and internal logic, rated 8 V to 18 V with 24 V absolute maximum for 1 minute. |
| 10 | GND | power_in | Reference ground pin, connected through resistor R2 to limit transient pulses, with built-in reverse battery polarity protection. |
| 11 | OR1 | output | Relay 1 driver output for the left indicator, with low saturation voltage (1.0 V at 8 V supply, 1.2 V at 12 V supply) and up to 300 mA relay current. |
| 12 | VS | power_in | Supply pin for the relay driver circuit, internally clamped by a 27 V zener diode (clamp voltage 25.0 V to 30.0 V). |
| 13 | OR2 | output | Relay 2 driver output for the right indicator, with low saturation voltage (1.0 V at 8 V supply, 1.2 V at 12 V supply) and up to 300 mA relay current. |
| 14 | OSC | passive | Second oscillator pin of the RC timing network (R1, C1) that sets the flash frequency per formula 5.1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Slkor(SLKORMICRO Elec.) |
| Package | SOP-14 |
| Category | Power Management ICs |
| Pins | 14 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 电源电压 Supply voltage | Vs | 8 |  | 18 | V | Pins5,9,12 | 6 |
| 电源电流 Supply current (standby) | Is |  |  | 15 | uA | 待命状态, Pins5,9,12 | 6 |
| 继电器输出电流 Relay output current | Io |  |  | 300 | mA | Pins11,13 | 6 |
| 饱和电压 Saturation voltage | Vo |  |  | 1 | V | RL=82Ω, Vs=8V | 6 |
| 饱和电压 Saturation voltage | Vo |  |  | 1.2 | V | RL=82Ω, Vs=12V | 6 |
| 继电器驱动电路反向电流 Reverse current | Io |  |  | 0.1 | mA | Pins 11，13 | 6 |
| 故障报警阈值电压 Alarm threshold voltage | Vs |  | 81 |  | mV | Vs=9V | 6 |
| 故障报警阈值电压的温度系数 Alarm threshold temperature coefficient | Tk |  |  | 10 | uV/K | Vs=13.5V, pin8 | 6 |
| 钳位电压 Clamp voltage | V12 | 25 | 27.5 | 30 | V | Tamb=-40℃ to 125℃ | 6 |
| 继电器输出过压检测阈值电压 Relay output overvoltage detection threshold | V12 | 18 | 20 | 22 | V | Tamb=-40℃ to 125℃ | 6 |
| 启动延时 第一次灯亮 Start delay | ton |  |  | 10 | ms | 第一次灯亮 | 6 |
| 电源电压 Supply voltage (1 min) | Vs |  |  | 24 | V | 1分钟, pins 5，9and 12 | 5 |
| 结温 Junction temperature | Tj |  |  | 150 | ℃ |  | 5 |
| 环境温度 Ambient temperature | Tamb | -40 |  | 125 | ℃ |  | 5 |
| 存储温度 Storage temperature | Tstg | -40 |  | 150 | ℃ |  | 5 |
| 调频电阻 Timing resistor R1 | R1 | 6.8 |  | 510 | kΩ |  | 7 |
| 调频电容 Timing capacitor C1 | C1 |  |  | 47 | uF |  | 7 |
| 频率公差 Frequency tolerance (normal flash frequency f1, excl. R1 and C1 tolerance) | Δf1 | -5 |  | 5 | % |  | 7 |
| 占空比（灯亮）基本频率 Duty cycle (lamp on) basic frequency f1 | f1 | 47 |  | 53 | % | 基本频率 f1 | 7 |
| 占空比（灯亮）倍闪频率 Duty cycle (lamp on) double flash frequency f2 | f2 | 37 |  | 45 | % | 倍闪频率 f2 | 7 |
| 频率倍增 灯失效 Frequency multiplication on lamp failure | f2 | 2.15 |  | 2.3 | × | 灯失效, f2 relative to f1 | 7 |
| 灯负载 Lamp load power | PL | 1 |  |  | W |  | 7 |
| 继电器线圈阻抗 Relay coil resistance | RL |  | 60 |  | Ω |  | 6 |
| 结温度 Junction-to-ambient thermal resistance (SO14) | RthJA |  | 120 |  | K/W | SO14 | 6 |

## CAD (KiCad official)

- Symbol: `SL2044`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOP-14 (KiCad packages3D, STEP)
- 3D model files: `sl2044-etched.step` / `sl2044-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sl2044.step` / `sl2044.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Slkor(SLKORMICRO Elec.) datasheet](docs/sl2044-datasheet.pdf) (8 pp, sha256 `f2bf457674d07d7d`, retrieved 2026-10-27, 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 `off` (skipped (clean text read)), 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/sl2044-datasheet.pdf)