Professional IC Distribution & Technical Solutions

The TLUR362T is an infrared (IR) emitter diode manufactured by Toshiba. Below are the factual specifications, descriptions, and features of the component:

Specifications:

• Manufacturer: Toshiba
• Type: Infrared Emitter Diode
• Wavelength: 940 nm (typical)
• Forward Voltage (VF): 1.35 V (typical at 50 mA)
• Forward Current (IF): 50 mA (continuous)
• Peak Forward Current (IFP): 1 A (pulsed)
• Radiant Intensity (Ie): 35 mW/sr (typical at 50 mA)
• Viewing Angle: ±20°
• Operating Temperature Range: -25°C to +85°C
• Package Type: T-1 (3mm)
• Lead Material: Copper alloy
• RoHS Compliance: Yes

Descriptions:

• The TLUR362T is a high-efficiency infrared emitter diode designed for applications requiring reliable IR signal transmission.
• It emits light at a wavelength of 940 nm, which is commonly used in remote control systems, optical sensors, and industrial automation.
• The component is housed in a compact T-1 (3mm) package with a narrow ±20° viewing angle for directional emission.

Features:

• High Radiant Intensity: Ensures strong IR signal output.
• Low Forward Voltage: Improves energy efficiency.
• Wide Operating Temperature Range: Suitable for various environmental conditions.
• Compact and Durable: T-1 package ensures easy integration into circuits.
• RoHS Compliant: Environmentally friendly and meets regulatory standards.

This information is based on Toshiba's official datasheet for the TLUR362T. For detailed performance graphs and reliability data, refer to the manufacturer's documentation.

# TLUR362T: Technical Analysis and Implementation Considerations

## Practical Application Scenarios

The TLUR362T, a high-efficiency Schottky barrier diode from Toshiba, is widely used in power supply and voltage clamping applications due to its low forward voltage drop (VF) and fast switching characteristics. Below are key application scenarios:

1. Switching Power Supplies

The diode’s low VF (typically 0.38V at 3A) minimizes power loss in DC-DC converters, making it ideal for synchronous rectification in buck and boost topologies. Its fast recovery time (<10ns) ensures efficient high-frequency operation.

2. Reverse Polarity Protection

In battery-powered systems, the TLUR362T prevents damage from incorrect power connections by blocking reverse current flow with minimal voltage drop compared to traditional PN-junction diodes.

3. Freewheeling Diode in Inductive Loads

When used across relays or motors, the diode suppresses voltage spikes by providing a low-resistance path for inductive kickback, protecting sensitive components.

4. OR-ing Circuits in Redundant Power Systems

The device’s low leakage current (<100µA) ensures minimal power loss when selecting between multiple power sources in fail-safe designs.

## Common Design Pitfalls and Avoidance Strategies

1. Thermal Management Oversights

Despite its efficiency, the TLUR362T can overheat under high continuous current (IF(AV) = 3A). Designers must ensure adequate PCB copper area or heatsinking to maintain junction temperature below 125°C.

*Mitigation:* Use thermal vias, wider traces, or external heatsinks for high-current paths.

2. Voltage Transient Misestimation

The diode’s peak repetitive reverse voltage (VRRM = 60V) may be insufficient for inductive load applications with large voltage spikes.

*Mitigation:* Implement additional TVS diodes or snubber circuits if transient voltages exceed VRRM.

3. Incorrect Layout for High-Frequency Operation

Parasitic inductance in long PCB traces can degrade switching performance, leading to ringing and EMI.

*Mitigation:* Place the diode close to the switching node and minimize loop area with tight component placement.

4. Forward Current Derating Neglect

Operating near the maximum IF(AV) without derating for ambient temperature can reduce reliability.

*Mitigation:* Derate current by 20-30% for temperatures above 85°C.

## Key Technical Considerations for Implementation

1. Electrical Parameters

• Verify VF and reverse leakage (IR) under expected operating conditions.
• Ensure the surge current (IFSM = 80A) meets transient load requirements.

2. Package Constraints

The SMA(DO-214AC) package offers compact sizing but requires attention to solder joint integrity under thermal cycling.

3. Compatibility with Fast Switching Circuits

Pair the diode with low-gate-charge MOSFETs to optimize synchronous rectifier efficiency.

4. Environmental Robustness

The TLUR362T’s operating range (-65°C to +125°C) suits industrial applications, but conformal coating may be needed in humid environments.