Home Power management LED drivers Illumination LED drivers

LM3561

ACTIVE

Synchronous boost converter with 600mA high side LED driver and I2C-compatible interface

Product details

Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) -0.3 Vin (max) (V) 6 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 0.6 Iq (typ) (mA) 0.676 Features I2C control, OVP Operating temperature range (°C) -40 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) -0.3 Vin (max) (V) 6 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 0.6 Iq (typ) (mA) 0.676 Features I2C control, OVP Operating temperature range (°C) -40 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
DSBGA (YFQ) 12 2.52000000000000018 mm² 1.8 x 1.4000000000000001
  • High-Side Current Source Allows Grounded LED Cathode
  • Up to 90% Efficient
  • Ultra-Small Solution Size: <16mm2
  • Three Operating Modes: Torch, Flash, and LED Indicator
  • Accurate and Programmable LED Current from 18mA to 600mA
  • Hardware Flash and Torch Enable
  • LED Thermal Sensing and Current Scaleback
  • Software Selectable Input Voltage Monitor
  • Programmable Flash Timeout
  • Dual Synchronization Inputs for RF Power Amplifier Pulse Events
  • Open and Short LED Detection
  • Active High Hardware Enable for Protection Against System Faults
  • 400kHz I2C-compatible Interface
  • 12-Bump (1.215mm × 1.615mm × 0.6mm) DSBGA Package

All trademarks are the property of their respective owners.

  • High-Side Current Source Allows Grounded LED Cathode
  • Up to 90% Efficient
  • Ultra-Small Solution Size: <16mm2
  • Three Operating Modes: Torch, Flash, and LED Indicator
  • Accurate and Programmable LED Current from 18mA to 600mA
  • Hardware Flash and Torch Enable
  • LED Thermal Sensing and Current Scaleback
  • Software Selectable Input Voltage Monitor
  • Programmable Flash Timeout
  • Dual Synchronization Inputs for RF Power Amplifier Pulse Events
  • Open and Short LED Detection
  • Active High Hardware Enable for Protection Against System Faults
  • 400kHz I2C-compatible Interface
  • 12-Bump (1.215mm × 1.615mm × 0.6mm) DSBGA Package

All trademarks are the property of their respective owners.

The LM3561 is a 2-MHz fixed-frequency current-mode synchronous boost converter. The device is designed to operate as a single 600-mA constant current driver for high-current white LEDs. The high-side current source allows for grounded cathode LED operation while the 250-mV regulated headroom voltage ensures that the LED current is well regulated and efficiency remains high.

The main features of the LM3561 include: an I2C-compatible interface for controlling the LED current, a hardware Flash enable input for direct triggering of the Flash pulse, dual TX inputs (TX1 and TX2) which force the Flash pulse into a low-current Torch mode during high battery current instances, an active high hardware enable (HWEN) allowing for fast hardware shutdown during system software failures, a dual mode pin which serves as either an indicator LED driver at up to 18mA or as a dedicated comparator input with an internal 1V reference, designed to monitor the voltage across a negative temperature coefficient thermistor (NTC), and a programmable input voltage monitor which monitors IN and can reduce the flash current or shutdown the device during low battery conditions.

Seven fault flags are available for read back over the I2C-compatible bus. These include: a flash timeout flag indicating the flash pulse has reached the end of the programmable timeout duration, a thermal shutdown flag indicating the LM3561's die temperature has exceeded 150°C, an LED fault flag indicating the output voltage has tripped the over-voltage threshold, or the LED has become shorted, TX1 and TX2 interrupt flags indicating if either of the TX inputs have been triggered, an NTC flag indicating the LED has experienced an over temperature condition, and a VIN Monitor flag indicating the input voltage has fallen below the VIN Monitor threshold.

The LM3561 is available in a tiny (1.215mm × 1.615mm × 0.6mm) 12-bump DSBGA and operates over the temperature range -40°C to +85°C.

The LM3561 is a 2-MHz fixed-frequency current-mode synchronous boost converter. The device is designed to operate as a single 600-mA constant current driver for high-current white LEDs. The high-side current source allows for grounded cathode LED operation while the 250-mV regulated headroom voltage ensures that the LED current is well regulated and efficiency remains high.

The main features of the LM3561 include: an I2C-compatible interface for controlling the LED current, a hardware Flash enable input for direct triggering of the Flash pulse, dual TX inputs (TX1 and TX2) which force the Flash pulse into a low-current Torch mode during high battery current instances, an active high hardware enable (HWEN) allowing for fast hardware shutdown during system software failures, a dual mode pin which serves as either an indicator LED driver at up to 18mA or as a dedicated comparator input with an internal 1V reference, designed to monitor the voltage across a negative temperature coefficient thermistor (NTC), and a programmable input voltage monitor which monitors IN and can reduce the flash current or shutdown the device during low battery conditions.

Seven fault flags are available for read back over the I2C-compatible bus. These include: a flash timeout flag indicating the flash pulse has reached the end of the programmable timeout duration, a thermal shutdown flag indicating the LM3561's die temperature has exceeded 150°C, an LED fault flag indicating the output voltage has tripped the over-voltage threshold, or the LED has become shorted, TX1 and TX2 interrupt flags indicating if either of the TX inputs have been triggered, an NTC flag indicating the LED has experienced an over temperature condition, and a VIN Monitor flag indicating the input voltage has fallen below the VIN Monitor threshold.

The LM3561 is available in a tiny (1.215mm × 1.615mm × 0.6mm) 12-bump DSBGA and operates over the temperature range -40°C to +85°C.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet Sync Boost Converter w/600mA High Side LED Driver & I2C-Compatible Interface datasheet (Rev. C) 02 May 2013
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
User guide AN-2252 LM3561 Evaluation Kit 08 May 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

GUI for evaluation module (EVM)

SNOC013 GUI Software for LM3561

Supported products & hardware

Supported products & hardware

Products
Illumination LED drivers
LM3561 Synchronous boost converter with 600mA high side LED driver and I2C-compatible interface
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Package Pins CAD symbols, footprints & 3D models
DSBGA (YFQ) 12 Ultra Librarian

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos