The TPS61169DCKR, developed by Texas Instruments (TI), is a high-voltage boost converter designed for driving white LED arrays in backlit applications. This device integrates a 40V, 1.8A MOSFET to deliver up to 38V output voltage and 1.2A continuous LED current, enabling reliable operation in compact, high-brightness lighting systems. Operating from an input voltage range of 2.7V to 5.5V, it supports battery-powered and low-voltage applications while offering up to 90% efficiency. Encapsulated in a space-saving SC-70-5 package, it meets -40°C to 125°C operating temperature requirements, ideal for automotive, industrial, and portable systems.

Key Features

• High-Voltage Boost Conversion: Delivers 38V output voltage and 1.8A peak current with a 40V-rated integrated MOSFET.
• PWM Dimming Control: Enables adjustable LED brightness via PWM signals (100:1 dimming ratio) on the CTRL pin.
• Robust Protection: Includes LED open-circuit protection, undervoltage lockout, thermal shutdown, and current limiting (1.2A minimum).
• High Efficiency & Compact Design: Operates at 1.2MHz switching frequency, reducing external component size and enabling a 5-pin SC-70 footprint.
• Precision Regulation: Maintains stable LED current via a 204mV reference voltage and internal compensation, minimizing output ripple and audible noise.
• Wide Input Range: Compatible with lithium-ion batteries and other low-voltage sources (2.7V to 5.5V).

Application Areas

The TPS61169DCKR is widely used in:

• Consumer Electronics: Backlighting for smartphones, tablets, and wearable devices.
• Automotive Systems: LED illumination for instrument clusters, infotainment displays, and dashboard lighting.
• Industrial Equipment: Panel backlighting in control systems, sensors, and HMI interfaces.
• Medical Devices: Portable diagnostic tools and LED-based monitoring systems requiring reliable, high-brightness lighting.

Summary

The TPS61169DCKR is a compact, high-efficiency LED driver optimized for demanding backlighting applications. Its integration of a 40V MOSFET, advanced protection features, and PWM dimming capabilities make it a versatile solution for space-constrained designs in automotive, industrial, and portable electronics. With a wide operating temperature range and minimal external components, this device simplifies system design while ensuring longevity and reliability in harsh environments.