MAX16821AATI+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High Efficiency, Dimmable, Automotive Grade
• Package: 28-pin TQFN
• Essence: Power Management IC for LED Lighting Applications
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Current: Up to 1.5A
• Switching Frequency: 200kHz to 2MHz
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to +125°C
• Protection Features: Overvoltage, Overcurrent, Overtemperature

Pin Configuration

The MAX16821AATI+T has a total of 28 pins. The pin configuration is as follows:

1. VIN: Input voltage
2. GND: Ground
3. VCC: Supply voltage
4. EN: Enable control
5. DIM: Dimming control input
6. FB: Feedback voltage
7. COMP: Compensation node
8. CS: Current sense input
9. SS/TR: Soft-start/Tracking control
10. BST: Bootstrap capacitor connection
11. LX: Switching node
12. PGND: Power ground
13. AGND: Analog ground
14. VREF: Reference voltage output
15. VSENSE: Voltage sense input
16. ISET: Current set input
17. ADJ: Adjustable output voltage
18. PWM: Pulse width modulation input
19. SYNC: Synchronization input
20. CLKOUT: Clock output
21. CLKIN: Clock input
22. RT: Timing resistor
23. CT: Timing capacitor
24. NC: No connect
25. NC: No connect
26. NC: No connect
27. NC: No connect
28. NC: No connect

Functional Features

• High efficiency power conversion for LED lighting applications
• Wide input voltage range allows operation in automotive and industrial environments
• Dimming control options enable brightness adjustment
• Integrated protection features ensure safe operation
• Compact package size for space-constrained designs

Advantages and Disadvantages

Advantages: - High efficiency results in energy savings - Dimming control provides flexibility in lighting applications - Automotive grade ensures reliability in harsh environments - Integrated protection features enhance system safety

Disadvantages: - Limited output current of up to 1.5A may not be suitable for high-power LED applications - Higher cost compared to non-integrated LED driver solutions

Working Principles

The MAX16821AATI+T is a buck LED driver IC that converts the input voltage to a regulated output current for driving LEDs. It utilizes a high-frequency switching regulator to efficiently control the LED current. The dimming control input allows for adjusting the brightness of the LEDs using either analog or pulse width modulation (PWM) signals.

The IC incorporates various protection features such as overvoltage, overcurrent, and overtemperature protection to safeguard the LEDs and the driver circuitry. These features ensure reliable operation and prevent damage to the LEDs under fault conditions.

Detailed Application Field Plans

The MAX16821AATI+T is commonly used in various LED lighting applications, including:

1. Automotive Lighting: Provides efficient and dimmable LED driver solutions for automotive headlights, taillights, and interior lighting.
2. Industrial Lighting: Enables high-efficiency LED drivers for industrial lighting fixtures, such as high bay lights and streetlights.
3. Architectural Lighting: Offers compact and reliable LED driver solutions for architectural lighting installations, including accent lighting and façade illumination.
4. Commercial Lighting: Supports energy-efficient LED drivers for commercial lighting applications, such as office lighting and retail displays.

Detailed and Complete Alternative Models

1. MAX16821AATI+:
   • Similar to MAX16821AATI+T but without the automotive temperature range (-40°C to +125°C).
2. MAX16821BETI+:
   • Buck-boost LED driver IC with similar features and specifications.
3. MAX16821CETI+:
   • Boost LED driver IC suitable for driving high-power LEDs.

These alternative models offer different form factors or additional features that may better suit specific application requirements.

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