Description

The MIC2287BD5TR is a boost-switching regulator designed for constant current, white LED driver applications. With a maximum output voltage of 34V and a switch current of over 500mA, it can easily drive a string of up to 8 white LEDs in series, ensuring uniform brightness and eliminating the need for multiple ballast resistors.

Specifications and features

• Input voltage: 2.5V to 10V
• Output voltage: up to 34V
• Switch current: over 500mA
• PWM operation frequency: 1.2 MHz
• Feedback voltage: 95mV
• Output overvoltage protection (OVP) options: 15V, 24V, and 34V
• Line and load regulation: less than 1%
• Shutdown current: less than 1µA
• Over-temperature protection
• UVLO (Under Voltage Lockout)
• Package options: Thin SOT-23-5 and 8-lead 2mm × 2mm MLF™
• Junction temperature range: -40°C to +125°C

Application Scenarios

The MIC2287BD5TR can be used in various applications, including:

• White LED driver for backlighting in cell phones, PDAs, GPS systems, digital cameras, MP3 players, and IP phones
• Photo flash LED driver
• LED flashlights
• Constant current power supplies

Comparison

Advantages:

• High output voltage of up to 34V
• Can drive a string of up to 8 white LEDs in series
• Uniform brightness without the need for multiple ballast resistors
• Wide input voltage range (2.5V to 10V)
• Protection features such as overvoltage, over-temperature, and UVLO
• Compact package options

Disadvantages:

• None identified