MAX1688ESA

Product Overview

Category: Integrated Circuit
Use: LED Driver
Characteristics: High Efficiency, Wide Input Voltage Range
Package: 8-SOIC
Essence: Efficient LED driver for automotive lighting applications
Packaging/Quantity: Tube/50

Specifications

Input Voltage Range: 5.5V to 28V
Output Voltage Range: Up to 40V
Output Current: Up to 250mA
Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

VIN (Pin 1) - Input Voltage
GND (Pin 2) - Ground
FB (Pin 3) - Feedback
EN (Pin 4) - Enable
VOUT (Pin 5) - Output Voltage
SW (Pin 6) - Switch Node
LX (Pin 7) - Inductor Connection
PGND (Pin 8) - Power Ground

Functional Features

Wide input voltage range suitable for automotive applications
High efficiency up to 98%
Adjustable output voltage
Overvoltage and overcurrent protection
Thermal shutdown protection

Advantages and Disadvantages

Advantages

High efficiency
Wide input voltage range
Compact 8-SOIC package
Comprehensive protection features

Disadvantages

Limited maximum output current
Requires external components for operation

Working Principles

The MAX1688ESA is a step-up constant-current LED driver designed for automotive lighting applications. It utilizes a high-efficiency, synchronous step-up converter topology to drive a string of LEDs with a constant current. The device regulates the LED current by adjusting the output voltage based on the feedback signal.

Detailed Application Field Plans

The MAX1688ESA is widely used in automotive lighting systems, including interior and exterior LED lighting, such as headlights, taillights, and dashboard illumination. Its wide input voltage range and high efficiency make it suitable for various automotive platforms.

Detailed and Complete Alternative Models

MAX16834: Higher output current capability
MAX16826: Integrated boost and flyback LED driver
LT3757: Multi-topology LED driver with higher power handling

In conclusion, the MAX1688ESA is a versatile LED driver tailored for automotive lighting applications, offering high efficiency, comprehensive protection features, and a compact package. While it has limitations in terms of maximum output current and external component requirements, its wide input voltage range and adjustable output voltage make it an ideal choice for automotive lighting designs.

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What is the MAX1688ESA?
- The MAX1688ESA is a high-voltage, current-mode, step-up LED driver IC designed for automotive and general lighting applications.
What is the input voltage range of the MAX1688ESA?
- The input voltage range of the MAX1688ESA is 6V to 28V, making it suitable for automotive and industrial applications.
What is the maximum output current of the MAX1688ESA?
- The MAX1688ESA can deliver up to 250mA of output current to drive LEDs in series.
How does the MAX1688ESA control LED brightness?
- The MAX1688ESA uses a PWM dimming control method to adjust the LED brightness.
Can the MAX1688ESA be used for dimming multiple LEDs independently?
- Yes, the MAX1688ESA supports independent PWM dimming of multiple LEDs connected in series.
What protection features does the MAX1688ESA offer?
- The MAX1688ESA provides overvoltage protection, open-LED protection, and thermal shutdown to ensure reliable operation.
Is the MAX1688ESA suitable for automotive lighting applications?
- Yes, the MAX1688ESA is specifically designed for automotive lighting applications, such as interior and exterior LED lighting.
What type of package does the MAX1688ESA come in?
- The MAX1688ESA is available in an 8-pin SOIC package, which is suitable for surface-mount assembly.
Can the MAX1688ESA operate in harsh environmental conditions?
- Yes, the MAX1688ESA is designed to operate in a wide temperature range and is capable of withstanding automotive environmental conditions.
Are there any application notes or reference designs available for the MAX1688ESA?
- Yes, Maxim Integrated provides application notes and reference designs to assist engineers in implementing the MAX1688ESA in their technical solutions.