Eaton XV Supercapacitors Complete Guide

XV3550-2R7307-R 35 53 standard plug-in type

XV3560-2R7407-R 35 63 standard plug-in type

XV3585-2R7607-R 35 87.5 standard plug-in type

Structural features:

Cylindrical aluminum shell packaging with insulation sleeve

Dual pin plug-in design, suitable for PCB through-hole installation

There is an explosion-proof valve at the bottom (in compliance with safety certification requirements)

Clear polarity markings (negative electrode with stripe markings)

3.2 Installation precautions

Ensure that the pins are correctly inserted into the PCB through holes and pay attention to the polarity direction

It is recommended to use support glue or fixing clamps to assist in fixation, especially for long size models

Avoid applying mechanical stress to the components after installation

Maintain sufficient ventilation space around the device to facilitate heat dissipation

Chapter 4 Selection Guide and Model Naming Rules

4.1 Analysis of Model Naming Rules

The XV series models follow the following naming conventions:

XV 35 60 - 2R7 407 - R

Example explanation of the meaning of code snippets

XV series code XV series supercapacitor

35 size reference - diameter 35 mm diameter

60 size reference - length 63 mm length

2R7 voltage (R represents decimal point) 2.7 V

407 capacitance value encoding 40 × 10 μ F=400 F

R Standard Product Identification Standard Product

4.2 Selection considerations

When choosing a suitable XV series supercapacitor, the following factors should be considered:

1. Requirement for capacitance value

300F: Suitable for short-term backup and pulse assistance

400F: Balance energy and power, universal selection

600F: Applications that require longer backup time or higher energy storage

2. ESR requirements

Low ESR means higher power output capability

The 600F model has the lowest ESR (2.6 m Ω) and is suitable for high pulse current applications

3. Working voltage

Standard working voltage 2.7V

85 ° C high temperature environment requires derating to 2.3V for use

4. Temperature environment

Standard working temperature: -40 ° C to+65 ° C

Expansion work: -40 ° C to+85 ° C (derating)

5. Space limitations

Select the appropriate length model (53mm, 63mm, or 87.5mm) based on the available height of the PCB

Chapter 5 Welding Guidelines and Process Requirements

5.1 Wave soldering process curve

The XV series supercapacitors support wave soldering technology, and the recommended temperature curve is as follows:

Standard tin lead solder and lead-free solder in the process stage

Preheating and immersion at 100 ° C

Preheating time maximum 60 seconds maximum 60 seconds

Preheat to maximum temperature difference of 160 ° C, maximum 160 ° C

Peak temperature (Tp) 220 ° C-260 ° C 250 ° C-260 ° C

Peak time (tp) maximum 10 seconds (maximum 5 seconds per peak) maximum 10 seconds (maximum 5 seconds per peak)

Minimum cooling rate~2 K/s, typical~3.5 K/s, maximum~5 K/s, minimum~2 K/s, typical~3.5 K/s, maximum~3.5 K/s

25 ° C to 25 ° C total time 4 minutes 4 minutes

5.2 Manual Welding

Temperature:+350 ° C

Time: 4-5 seconds (using a soldering iron)

Attention: Manual welding is generally not recommended. If manual operation is required, time and temperature must be strictly controlled

5.3 Cleaning Guide

Although it is recommended to avoid cleaning circuit boards as much as possible, if cleaning is necessary, the following principles should be followed:

Cleaning method: static soaking or ultrasonic soaking

Cleaning solution: Standard circuit board cleaning solution

Cleaning time: no more than 5 minutes

Maximum temperature:+60 ° C

Subsequent processing: Thoroughly rinse and dry the circuit board

Important reminder: The cleaning treatment of supercapacitors should follow the same principles as aluminum electrolytic capacitors.

Chapter 6 Application Design and Performance Optimization

6.1 Basic Circuit Design Considerations

1. Voltage balance

When multiple supercapacitors are used in series, voltage balance must be considered. Due to differences in capacitance and leakage current among capacitors, the voltage of each individual unit may be uneven after series connection. Suggest adopting the following balance method:

Passive balancing: Parallel balancing resistors, resistance selection needs to balance balancing effect and static power consumption

Active balancing: using a dedicated voltage balancing IC, suitable for applications that require high efficiency

2. Overvoltage protection

Supercapacitors are sensitive to overvoltage, and working voltage exceeding the rated value can accelerate aging and even lead to failure. In the design, it should be ensured that:

The charging circuit has precise voltage control

Consider the impact of temperature changes on voltage

Monitor the voltage of each individual cell in a series configuration

3. Current limitation

Although supercapacitors can withstand high peak currents, continuous overcurrent can cause overheating. The current limiting circuit should be designed based on the continuous current and peak current parameters in the data manual.

6.2 Thermal Management

The performance and lifespan of XV series supercapacitors are closely related to their operating temperature

High temperature effects: accelerate water evaporation and electrolyte decomposition, leading to capacitance decay and increased ESR