# PAM2841SR

**Diodes Incorporated** · LED Drivers · MSOP-8

PAM2841SR from Diodes Incorporated, in a MSOP-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 | PGND | power_in | Power ground, kept as a separate trace from signal ground and joined to it at a quiet ground point. |
| 2 | VIN | power_in | Input voltage supply pin, 2.7V to 5.5V supply range, with an input capacitor of at least 1µF placed close to it. |
| 3 | ENA | input | Active-high chip enable (high ≥1.2V on, low ≤0.4V shutdown) that also accepts a 100Hz to 200Hz PWM dimming signal. |
| 4 | Comp | passive | Compensation node, which can be pulled down by an N-MOSFET for PWM dimming at 100Hz to 500Hz. |
| 5 | GND | power_in | Chip (signal) ground, to be kept close to the IC and the input capacitor. |
| 6 | FB | input | Feedback pin regulating to a 200mV (194mV to 206mV) feedback voltage across the LED current-sense resistor. |
| 7 | OVP | input | Overvoltage protection sense input with a 1.2V open-load threshold. |
| 8 | SW | passive | Drain of the main switch, rated to 40V maximum with a 1.5A current limit. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | MSOP-8 |
| Category | Driver ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Quiescent Current | IQ |  | 200 | 300 | µA | No Switching | 4 |
| Shutdown Current | ISD |  |  | 1 | µA | VENA = Low | 4 |
| Supply-Voltage Range | VDD | 2.7 |  | 5.5 | V |  | 4 |
| Output-Voltage Range | VO |  |  | 40 | V | min is VIN x 1.1 | 4 |
| Feedback Voltage | VFB | 194 | 200 | 206 | mV | VENA = High | 4 |
| SW On-Resistance | RDS(ON) |  | 0.35 | 0.5 | Ω | ISW = 100mA | 4 |
| SW Frequency | fSW | 0.7 | 1 | 1.3 | MHz |  | 4 |
| Enable Threshold Voltage, Chip Shutdown | VEL |  |  | 0.4 | V | Chip Shutdown | 4 |
| Enable Threshold Voltage, Chip On | VEH | 1.2 |  |  | V | Chip On | 4 |
| Undervoltage Lockout | UVLO | 2 | 2.2 | 2.4 | V | VIN Falling | 4 |
| Output Current | IO |  | 40 |  | mA | R3 = 5.1Ω | 4 |
| Output Current | IO |  | 30 |  | mA | R3 = 6.8Ω | 4 |
| Output Current | IO |  | 20 |  | mA | R3 = 10Ω | 4 |
| Output Current | IO |  | 10 |  | mA | R3 = 20Ω | 4 |
| SW Current Limit | ILIM |  | 1.5 |  | A | Switch On | 4 |
| Maximum Duty Cycle | DC |  | 95 |  | % |  | 4 |
| Overvoltage Protection Threshold | OVP |  | 1.2 |  | V | Open Load | 4 |
| UVLO Hysterisis | VTH |  | 0.2 |  | V |  | 4 |
| Overtemperature Shutdown | OTS |  | 150 |  | °C |  | 4 |
| Overtemperature Hysterisis | OTH |  | 30 |  | °C |  | 4 |
| Supply Voltage |  |  |  | 6 | V | TA = +25°C | 3 |
| Maximum SW Pin Voltage |  |  |  | 40 | V | TA = +25°C | 3 |
| Storage Temperature |  | -65 |  | 170 | °C |  | 3 |
| Maximum Junction Temperature |  |  |  | 170 | °C |  | 3 |
| Soldering Temperature |  |  |  | 300 | °C | 5sec | 3 |
| Supply-Voltage Range |  | 2.8 |  | 5.5 | V | TA = +25°C | 3 |
| Operation Temperature Range |  | -40 |  | 85 | °C |  | 3 |
| Junction Temperature Range |  | -40 |  | 150 | °C |  | 3 |
| Thermal Resistance (Junction to Ambient) | θJA |  |  | 180 | °C/W | MSOP-8 | 3 |
| Thermal Resistance (Junction to Case) | θJC |  |  | 75 | °C/W | MSOP-8 | 3 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin |  Terminals: Matte Tin plated Leads, Solderable per M2003 JESD22-B102  Weight: 0.027 grams (Approximate) | 14 |

## CAD (KiCad official)

- Symbol: `PAM2841SR`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `pam2841sr-etched.step` / `pam2841sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pam2841sr.step` / `pam2841sr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/PAM2841SR.pdf) (15 pp, sha256 `8c303b145bcb031d`, retrieved 2026-10-22, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/pam2841sr-datasheet.pdf)