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Product details

Parameters

Channels (#) 8 Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Switching frequency (Max) (kHz) 1600 Product type Capacitive LED current per channel (mA) 30 Shutdown current (Typ) (uA) 3.7 Topology Boost, Current Sink Peak efficiency (%) 92 Features I2C Control Operating temperature range (C) -30 to 85 open-in-new Find other Backlight LED drivers

Package | Pins | Size

DSBGA (YFQ) 20 0 mm² 2.057 x 1.651 open-in-new Find other Backlight LED drivers

Features

  • Drives up to 8 LEDs with up to 30mA of Diode Current Each
  • 32 Exponential Dimming Steps with 800:1 Dimming Ratio for Group A (Up to 6 LEDs)
  • 8 Linear Dimming States for Groups B (Up to 3 LEDs) and D1C (1 LED)
  • Programmable Auto-Dimming Function
  • 3 Independently Controlled LED Groups Via I2C Compatible Interface
  • Up to 90% Efficiency
  • Total Solution Size < 21mm2
  • Low Profile 20 Bump DSBGA Package (1.615mm × 2.015mm × 0.6mm)
  • 0.4% Accurate Current Matching
  • Internal Soft-Start Limits Inrush Current
  • True Shutdown Isolation for LED’s
  • Wide Input Voltage Range (2.7V to 5.5V)
  • Active High Hardware Enable

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open-in-new Find other Backlight LED drivers

Description

The LM2756 is a highly integrated, switched-capacitor, multi-display LED driver that can drive up to 8 LEDs in parallel with a total output current of 180mA. Regulated internal current sources deliver excellent current and brightness matching in all LEDs.

The LED driver current sinks are split into three independently controlled groups. The primary group (Group A) can be configured to drive four, five or six LEDs for use in the main phone display, while the secondary group (Group B) can be configured to drive one, two or three LEDs for driving secondary displays, keypads and/or indicator LEDs. An additional driver, D1C, is provided for additional indicator lighting functions.

The device provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2 or in Pass-Mode. The proper gain for maintaining current regulation is chosen, based on LED forward voltage, so that efficiency is maximized over the input voltage range.

The LM2756 is available in TI's tiny 20-bump, 0.4mm pitch, thin DSBGA package.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet Multi-Display Inductorless LED Driver w/32 Exponential Dimming Steps in DSBGA datasheet (Rev. C) May 01, 2013
White papers Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
Technical articles Overcoming challenges for backlight LED drivers in automotive display solutions Jul. 16, 2020
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014
Application notes Designing Energy-Efficient Handheld Illum Solutions (Rev. A) Apr. 30, 2013

Design & development

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Hardware development

EVALUATION BOARDS Download
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Description

The LM2756 is a highly integrated, switched-capacitor, multi-display LED driver that can drive up to 8 LEDs in parallel with a total output current of 180mA. Regulated internal current sources deliver excellent current and brightness matching in all LEDs

The LM2756 is a highly integrated (...)

Features
  • Drives up to 8 LEDs with up to 30mA of Diode Current each
  • 32 Exponential Dimming Steps with 800:1 Dimming Ratio for Group A (Up to 6 LEDs)
  • 8 Linear Dimming States for Groups B (Up to 3 LEDs) and D1C (1 LED)
  • Programmable Auto-Dimming Function
  • 3 Independently Controlled LED Groups Via I 2C Compatible (...)

Design tools & simulation

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PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
DSBGA (YFQ) 20 View options

Ordering & quality

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