MAX1985ETP+T

LED Driver IC Overview

The MAX1985ETP+T is a high-efficiency white LED driver manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 2.7V to 5.5V and supports output currents up to 30mA per channel. The device integrates three independent constant-current sinks with adjustable current settings via external resistors. It features a 1.2MHz fixed-frequency PWM dimming capability for brightness control. The component is housed in a compact 20-pin TQFN package with an exposed thermal pad, designed for surface-mount applications.

LED Driver IC Feature Summary

• Integrates three independent constant-current LED drivers for multi-channel white LED arrays
• Supports high-frequency PWM dimming for precise brightness control without color shift
• Includes internal bootstrap diode and charge pump circuitry for efficient high-side driving
• Features thermal shutdown protection to safeguard the device during over-temperature conditions

LED Driver IC Applications

• Backlighting for mobile phones and handheld devices
• White LED illumination for LCD displays
• Camera flash lighting systems
• Portable electronic device indicator lights

LED Driver IC Procurement Notes

Verify the exact suffix (e.g., +T) against the manufacturer's official datasheet to ensure correct packaging and RoHS compliance status. Confirm that the specific revision matches your design requirements, as pinouts or electrical characteristics may vary between revisions. Cross-reference the part number with authorized distributors to avoid counterfeit components.

LED Driver IC Selection Notes

Select this component when designing circuits requiring multiple white LEDs driven from a single low-voltage source. Ensure the external resistor values are calculated correctly to set the desired current levels within the 30mA limit. Consider the thermal performance of the PCB layout due to the exposed pad requirement for adequate heat dissipation during operation.

LED Driver IC Part Context

This part belongs to the Maxim Integrated family of LED drivers, specifically optimized for portable consumer electronics. It complements other power management solutions by providing dedicated lighting control. The TQFN package allows for space-constrained designs common in modern mobile devices. It serves as a direct replacement for older discrete LED driver solutions.

LED Driver IC Replacement Considerations

Check for MAX1985 variants with different suffixes for packaging changes. Verify compatibility with MAX1986 if additional channels are needed. Ensure substitute parts support the same 20-TQFN footprint and thermal requirements.