TB62771FTG,8,EL

Overview

The TB62771FTG,8,EL is a Toshiba LED driver IC designed for LCD backlighting applications. It features a boost DC/DC topology with four open-drain output channels capable of delivering up to 150 mA per channel. The device operates within an input voltage range of 4.75 V to 40 V and supports a switching frequency of 2 MHz. Packaged in a 20-WQFN (4x4) format, it functions reliably between -40°C and +85°C. Key electrical parameters include a maximum power dissipation of 3.2 W and a maximum supply current of 5.5 mA.

Feature Summary

• Integrates a step-up DC/DC converter with four independent constant-current output channels for multi-string LED driving.
• Supports PWM dimming control for precise brightness adjustment in display backlighting systems.
• Includes internal protection mechanisms against overcurrent and thermal overload conditions.

Applications

• LCD backlighting for mobile devices
• LED illumination drivers for portable electronics
• Constant current regulation for white color LED arrays

Procurement Notes

Verify the specific suffix '8,EL' corresponds to the required tape-and-reel packaging configuration as defined by Toshiba Semiconductor and Storage. Confirm that the 20-WQFN footprint matches the target PCB layout dimensions. Ensure compliance with RoHS3 standards if applicable to the end product requirements. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when designing high-efficiency boost converters for multi-channel LED backlights requiring up to 150 mA per string. The 2 MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the 40 V maximum input limit and 3.2 W power dissipation capability when evaluating thermal management solutions for the 20-WQFN package.

Part Context

This part belongs to the TB62771 series of LED lighting drivers from Toshiba. It is specifically engineered for applications requiring multiple LED strings driven from a single boost regulator. The device integrates power MOSFETs and control logic into a compact surface-mount package, simplifying the design of efficient backlighting circuits for consumer electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pin-to-pin compatibility and electrical specifications before considering alternative manufacturers or different Toshiba series parts.

FAQ

What is the maximum output current per channel?

The TB62771FTG,8,EL supports a maximum output current of 150 mA per channel across its four outputs.

Does the device support analog dimming?

The official documentation specifies PWM dimming control; analog dimming capabilities are not explicitly documented for this specific part number.