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Product details

Parameters

Channels (#) 2 Vin (Min) (V) 3 Vin (Max) (V) 6 Switching frequency (Max) (kHz) 1200 Product type Inductive LED current per channel (mA) 23 Shutdown current (Typ) (uA) 1.5 Topology Boost Peak efficiency (%) 85 Features Synchronous Rectification Operating temperature range (C) -40 to 85 open-in-new Find other Backlight LED drivers

Package | Pins | Size

VSON (DRC) 10 9 mm² 3.00 x 3.00 open-in-new Find other Backlight LED drivers

Features

  • 2.5-V to 6-V Input Voltage Range
  • Two Outputs Each up to 27 V
  • 0.7-A Integrated Switch
  • Built-In Power Diode
  • 1.2-MHz PWM for WLED Driver
  • PFM for OLED Supply
  • Individually Programmable Output
  • Input to Output Isolation
  • Short-Circuit Protection
  • Built-In Soft Start
  • Overvoltage Protection
  • Up to 82% Efficiency
  • Up to 30 kHz PWM Dimming Frequency
  • Available in a 10 Pin, 3 × 3 mm QFN Package
  • APPLICATIONS
    • Clamshell Phone With OLED/LCD Screen

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Description

The TPS61140/1 is a dual output boost converter IC. It is intended to be configured as a highly integrated power solution providing regulated voltage and current output with one boost converter. This device is ideal for driving the OLED sub display and WLED backlight for the LCD main display in clam shell phones. The voltage and current can be individually programmed through external resistors. There is a dedicated selection pin for each output, so the two outputs can be turned on separately or simultaneously. When only the voltage output is enabled, the boost converter is controlled by pulse frequency modulation (PFM) in order to achieve high efficiency over a wide load range. If the current output is selected, the device adopts a 1.2-MHz pulse width modulation control (PWM) method in order to maximize output current. Applying an external PWM signal to the select pin (SELI) reduces the output current thereby allowing WLED dimming.

The TPS61140/1 has a built-in power MOSFET and power diode; thereby, eliminating the needs for any external active power components. In addition, the high switching frequency reduces the external inductor and capacitor sizes. Overall, the IC provides a highly compact solution with high efficiency and plenty of flexibility.

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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 11
Type Title Date
* Datasheet Dual Output Boost Regulator Using SIngle Inductor datasheet (Rev. B) Mar. 22, 2007
Technical articles Overcoming challenges for backlight LED drivers in automotive display solutions Jul. 16, 2020
Application notes Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application notes Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) Nov. 29, 2017
Application notes Extending the Soft Start Time Without a Soft Start Pin (Rev. B) Jun. 15, 2017
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 IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
Application notes Minimizing Ringing at the Switch Node of a Boost Converter Sep. 15, 2006

Design & development

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Hardware development

EVALUATION BOARDS Download
49
Description

The TPS61140EVM-157 is an evaluation tool for the TPS6114x family. This is a dual channel, single Inductor Boost Converter which is ideal for driving the OLED sub-display and white LED backlight for the LCD main display in clam shell phones.

Features
  • Input Voltage: 3 V to 6 V
  • Output Voltage: up to 27 V each (max)
  • Switch current Limit: 0.7 A (max)
  • Efficiency: 83% (max)
  • Built in Power Diode and Soft-start
  • Input to Output isolation
  • Over voltage & Short circuit protection
  • Built in 1.2 MHz fixed switching frequency
  • Up to 30 kHz dimming frequency
  • Package: 3x3 QFN-10 (...)

Design tools & simulation

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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
  • (...)
GERBER FILES Download
SLVC138.ZIP (97 KB)

CAD/CAE symbols

Package Pins Download
VSON (DRC) 10 View options

Ordering & quality

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