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Product details

Parameters

Channels (#) 8 Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Vout (Min) (V) 2.7 Vout (Max) (V) 6 Switching frequency (Max) (kHz) 1600 Type Capacitive LED current per channel (mA) 30 LED (#) 8 Topology Boost, Current Sink Shutdown current (Typ) (uA) 3.7 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.

open-in-new Find other Backlight LED drivers
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Technical documentation

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Type Title Date
* Datasheet Multi-Display Inductorless LED Driver w/32 Exponential Dimming Steps in DSBGA datasheet (Rev. C) May 01, 2013
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Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014
Technical articles Solving the automotive EMI issues in new cars with all the screens Sep. 10, 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
$99.00
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 (...)

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Package Pins Download
DSBGA (YFQ) 20 View options

Ordering & quality

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