MAX16838AUP+ - English Editing Encyclopedia Entry

Product Overview

Category

The MAX16838AUP+ belongs to the category of integrated circuits (ICs) specifically designed for LED lighting applications.

Use

This product is primarily used for driving high-brightness LEDs in various lighting systems, including automotive, architectural, and general lighting.

Characteristics

• The MAX16838AUP+ offers a high level of integration, combining a step-up DC-DC converter and an LED current regulator in a single package.
• It provides efficient power conversion and precise current regulation, ensuring optimal performance of the connected LEDs.
• This IC supports both analog and PWM dimming techniques, allowing for flexible control of the LED brightness.
• It operates over a wide input voltage range, making it suitable for different power supply configurations.
• The MAX16838AUP+ incorporates various protection features, such as thermal shutdown and overvoltage protection, ensuring the safety and reliability of the LED lighting system.

Package and Quantity

The MAX16838AUP+ is available in a small 20-pin TSSOP (Thin Shrink Small Outline Package) package. It is typically sold in reels containing a quantity of 250 units.

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: Up to 40V
• Maximum Output Current: 1.2A
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to +125°C
• Package Type: 20-pin TSSOP

Detailed Pin Configuration

The MAX16838AUP+ features the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin for regulating LED current
4. DIM: Dimming control input pin
5. EN: Enable pin for turning the IC on/off
6. VOUT: Output voltage pin
7. LX: Inductor connection pin
8. SW: Switching node pin
9. PGND: Power ground pin
10. CS: Current sense input pin
11. RSET: Resistor selection pin for LED current regulation 12-20. NC: No connection pins

Functional Features

The MAX16838AUP+ offers several functional features that enhance its performance and usability:

1. Integrated Step-Up Converter: The built-in DC-DC converter efficiently boosts the input voltage to a level suitable for driving high-brightness LEDs.
2. LED Current Regulation: The IC incorporates a precise current regulator, ensuring consistent and accurate LED brightness control.
3. Dimming Control Options: It supports both analog and PWM dimming techniques, allowing for versatile control of the LED output.
4. Wide Input Voltage Range: The MAX16838AUP+ can operate over a wide range of input voltages, accommodating various power supply configurations.
5. Protection Mechanisms: This IC includes protection features like thermal shutdown and overvoltage protection, safeguarding the connected LEDs and the IC itself.

Advantages and Disadvantages

Advantages

• High integration reduces external component count and simplifies circuit design.
• Efficient power conversion minimizes energy losses and maximizes system efficiency.
• Precise current regulation ensures consistent and uniform LED brightness.
• Support for analog and PWM dimming techniques provides flexibility in lighting control.
• Wide input voltage range allows compatibility with different power supply setups.

Disadvantages

• Limited maximum output current may not be suitable for applications requiring higher LED currents.
• The 20-pin TSSOP package may pose challenges in space-constrained designs.

Working Principles

The MAX16838AUP+ operates by converting the input voltage to a higher level using an integrated step-up DC-DC converter. The boosted voltage is then regulated to provide a constant current to the connected LEDs. This current regulation ensures uniform brightness across the LEDs, regardless of variations in input voltage or LED characteristics. The IC also allows for dimming control through analog or PWM signals, enabling precise adjustment of the LED brightness.

Detailed Application Field Plans

The MAX16838AUP+ finds extensive application in various lighting systems, including:

1. Automotive Lighting: It can be used in automotive headlights, taillights, and interior lighting, providing efficient and reliable LED driving.
2. Architectural Lighting: The IC enables precise control of LED brightness in architectural lighting installations, enhancing ambiance and energy efficiency.
3. General Lighting: It is suitable for general lighting applications such as residential and commercial lighting, offering efficient and flexible LED driving solutions.

Detailed and Complete Alternative Models

• MAX16838BUP+: Similar to the MAX16838AUP+, but with a higher maximum output current of 1.5A.
• MAX16838CUP+: A variant with an extended temperature range (-40°C to +150°C), suitable for harsh environment applications.
• MAX16838D