Opto-Electronic Device# Technical Datasheet: LN513RKM LED
Manufacturer: Panasonic
Component Type: Chip LED (Light Emitting Diode)
Document Revision: 1.0
Date: October 26, 2023
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## 1. Application Scenarios
The LN513RKM is a compact, surface-mount, red diffused LED designed for a broad range of indicator and backlighting applications. Its combination of size, brightness, and reliability makes it a versatile choice for modern electronic designs.
### Typical Use Cases
* Status and Power Indicators: Primary application is as a power-on, standby, or operational status indicator in consumer electronics, computer peripherals, and industrial control panels.
* Backlighting for Legends and Symbols: Used to illuminate keycaps, membrane switch panels, icons on front panels, and small graphical displays where even, diffused light is required.
* Automotive Interior Lighting: Suitable for non-critical interior indicator lights, such as button backlighting in infotainment systems or climate controls, due to its wide viewing angle and stable performance.
* Portable and Wearable Devices: Its miniature 1608 (1.6mm x 0.8mm) package size is ideal for space-constrained applications like smartwatches, fitness trackers, and compact medical devices.
### Industry Applications
* Consumer Electronics: Smartphones, tablets, routers, TVs, gaming consoles, and audio equipment.
* Industrial Automation: HMI (Human-Machine Interface) panels, PLC status indicators, and machinery control units.
* Telecommunications: Network switches, routers, modems, and base station equipment.
* Automotive: Center stack displays, dashboard auxiliary indicators, and interior accessory lighting.
* Medical Devices: User interface indicators on handheld diagnostic tools and monitoring equipment.
### Practical Advantages and Limitations
Advantages:
* Miniature Footprint: The 1608 package saves valuable PCB real estate, enabling denser designs.
* Diffused Lens: Provides a wide viewing angle (approx. 120°) with soft, even light emission, eliminating hot spots.
* High Reliability: Robust construction suitable for reflow soldering and capable of withstanding typical manufacturing and operational environments.
* Low Power Consumption: Operates at standard LED forward currents (e.g., 20mA), making it energy-efficient.
Limitations:
* Luminous Intensity: While sufficient for indicators and local backlighting, it is not designed for high-brightness tasks like general illumination or daylight-visible signage.
* Thermal Management: Like all LEDs, performance and lifetime degrade with excessive junction temperature. Continuous operation at absolute maximum ratings is not advised.
* Color Specificity: Emits light in a specific red wavelength (e.g., 625nm). For other colors, a different LED model must be selected.
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## 2. Design Considerations
Proper integration of the LN513RKM is crucial for optimal performance, longevity, and reliability.
### Common Design Pitfalls and Solutions
* Pitfall 1: Excessive Forward Current
* Risk: Drastically reduced operational lifetime, accelerated lumen depreciation, and potential catastrophic failure.
* Solution: Always drive the LED using a constant current source or a current-limiting resistor. Adhere strictly to the recommended forward current (*I_F*) specified in the datasheet (typically 20mA). Calculate the series resistor as: `R = (V_Source - V_F) / I_F`, where `V_F` is the LED's forward voltage.
* Pitfall 2: Incorrect Polarity
* Risk: The LED will not illuminate. Prolonged reverse bias beyond the absolute maximum rating can damage the device.
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