LM27953TL/NOPB

$2.28

Description：IC LED DRV RGLTR PWM 18DSBGA
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:7def04eb3fe6 Category: LED Drivers IC Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：IC LED DRV RGLTR PWM 18DSBGA
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)
Type：DC DC Regulator
Topology：Switched Capacitor (Charge Pump)
Internal Switch(s)：Yes
Number of Outputs：4
Voltage - Supply (Min)：2.7V
Voltage - Supply (Max)：5.5V
Voltage - Output：-
Current - Output / Channel：20mA
Frequency：500kHz
Dimming：PWM
Applications：Backlight
Operating Temperature：-30°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：18-WFBGA
Supplier Device Package：18-DSBGA
Grade：-
Qualification：-

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LM27953TL/NOPB

Overview

The LM27953TL/NOPB is a white LED driver featuring four current sinks and a switched capacitor boost topology. It operates at a switching frequency of 500kHz and supports PWM dimming for brightness control. The device provides up to 60mA total output with 20mA per channel, utilizing a fixed 1.5x charge pump mode for efficiency across varying battery voltages. It is housed in an 18-DSBGA package measuring 2.10 x 2.40 mm with a height of 0.60 mm. The operating temperature range is -30°C to 85°C.

Feature Summary

Switched capacitor (charge pump) topology for efficient regulation
Four independent LED current sinks with 20mA per channel capability
PWM dimming interface for precise brightness adjustment
Fixed 1.5x charge pump mode for stable operation

Applications

Smartphone backlight systems
Tablet display illumination
Handheld device LED drivers

Procurement Notes

Verify the specific suffix TL/NOPB against the manufacturer's official datasheet to confirm pinout compatibility and RoHS compliance status. Ensure the ordering part number matches the required tape-and-reel or cut-tape packaging format specified by the supplier. Cross-reference the component marking code with the latest Texas Instruments documentation to prevent counterfeit substitution errors during assembly.

Selection Notes

Select this component when designing compact mobile devices requiring high-efficiency LED backlighting from single-cell lithium-ion batteries. The integrated charge pump eliminates the need for external inductors, saving board space. Consider the 500kHz switching frequency for EMI management and the 1.5x voltage gain for optimal performance under low battery conditions.

Part Context

This device belongs to the LM27953 family of LED drivers from Texas Instruments. Variants include LM27953, LM27953TL, and LM27953TLX. The NOPB suffix indicates lead-free manufacturing. These components are designed for portable electronics where size and power efficiency are critical constraints for display illumination applications.