Kinetic Releases Higher Current, Triple Channel Camera Flash Driver IC KTD2686 with Independent LED Control

PublishTime： 2023-12-23 Article Source：Kinetic Technologies News

Kinetic Technologies, a high-performance analog, and mixed-signal semiconductor company focused on developing power management solutions for computing, consumer, industrial, and communications markets, introduced the KTD2686 a three-channel, high current LED Flash driver IC, with independent channel control. The KTD2686 is a one-chip solution, aimed at smartphones featuring a dual LED main Flash and a single torch LED, reducing the total component count, pcb area, and cost.

The KTD2686 Camera Flash Driver IC consists of a high switching frequency synchronous boost converter, two independently controlled current sources, and one current sink in a small WLCSP package size. LED 1 and LED 2 are powered from the boost converter, supplying 1.5A and 1.0A respectively, and LED3 directly from the input, supplying 0.5A. The inductor-based boost converter integrates two low RDSON power MOSFETs and operates at a switching frequency of 2MHz or can be programmed to 4MHz minimizing the size of the external inductor and capacitors.

The control interface is designed for maximum flexibility and compatibility with various types of system controls. The KTD2686 is mainly programmed and controlled via an I²C-compatible interface, but also includes three logic inputs that can provide a hardware flash enable (STROBE) and a hardware torch enable (TORCH), as well as a flash interrupt (TX), which can be used to reduce the flash current during power amplifier pulse event to lower the battery load current. The I²C control features include the independent on/off and current control of the two current sources (LED1/LED2) in Flash/Torch/IR modes, their on/off ramp timing and current shape control, three input low voltage protection modes, flash safety time-out protection, boost converter current limit and switching frequency options, and various fault events read back. For the current sink LED3, the I²C interface can control its current value in Torch/IR modes. In addition, the KTD2686 also has various protection features including LED open and short protection, thermal regulation to prevent IC temperature from going too high, and thermal shutdown protection.

“Most LED driver ICs normally only provide the capability of driving a single or dual, rear-facing LED flash,” said Phil Dewsbury, Senior Director of Product Marketing at Kinetic Technologies. “With the increasing use of smartphones for video conferencing, or for taking selfies, the KTD2686 provides an extra LED driver to provide additional light to the front-facing camera, significantly enhancing the picture quality. Using the KTD2686 allows the designer to not only reduce the solution size but also dispense with the need for another driver IC and the associated inductor and capacitors, significantly reducing the system cost.”

The KTD2686 is supplied in a WLCSP-12, 1.42 x 1.66mm, RoHS and Green Compliant package and is rated over the -40 degree C to +85 degree C temperature range.

Key Features of KTD2686

High efficiency synchronous boost converter with 2MHz/4MHz switching frequency option

Two-channel independent current sources and one current sink

- LED 1 Flash current up to 1.5A

- LED 2 Flash current up to 1.00A

- LED 3 Flash current up to 0.5A

Flexible I²C interface programming plus hardware control

- STROBE/TORCH control

- Flash/Torch/IR modes

- Independent LED on/off and current settings

- Programmable ramp shape and time control

-I²C fault read back

Comprehensive protection

- Three input low voltage protection modes

- Flash time-out protection up to 400ms

- LED open/short protection

LED1, 2 cathode ground connection for improved thermal dissipation

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