The LCD Power Solution KTZ8850 from Kinetic Technologies Increases Performance and Reduces Overall Size by 70 Percent

时间： 2023-11-29 来源：Kinetic Technologies News

技术问答

Power management leader, Kinetic Technologies, is expanding its Display Power portfolio with the introduction of KTZ8850, a high-efficiency step-up LED driver with dual output LCD bias power. The KTZ8850 offers higher efficiency and more programmability than competitors' discrete solutions in a smaller package that offers more than 70 percent savings in board space.

Senior Director of Mobile in the Kinetic Technologies Marketing group, Erik Ogren, says, “This is the latest addition to our extensive Display Power portfolio as we continue to focus on highly integrated solutions with a reduced footprint. KTZ8850 combines high efficiency and flexible configurations via an I²C compatible interface all in a tiny 2.5mm x 1.3mm package.”

The KTZ8850 combines the two main power functions required by the LCD panel, namely the LED backlight driver and the LCD panel bias, controlled from a single I²C address.

The LED backlight driver features a step-up converter with an integrated 40V low-side power MOSFET, achieving a peak efficiency of 86 percent. The LED current can be programmed via the I²C compatible interface in 256-steps or via the PWM-dimming input, which achieves high accuracy across a wide dimming range that goes as low as 1 percent duty cycle at 30kHz.

The LCD bias driver section uses a single inductor and can support up to 80mA from each of the outputs, with a peak efficiency of up to 90 percent. The positive and negative voltage outputs and turn-on sequences are configurable via the I2C-compatible interface. Output voltages from +/-4.0V to +/-6.3V can be programmed in 100mV steps.

Key applications for the new KTZ8850 include LCD bias and backlight LED drivers, which reach across smartphones, tablets, camcorders, digital cameras, and more.

Product Features Include:

Pb-free Package: WLCSP-18 2.47×1.27mm

LED Backlight Driver

- Drives up to 10 series LEDs or 2P8S LEDs

- Backlight efficiency: up to 86 percent

- Flexible dimming control

256-step(8 bits) I²C compatible control or

PWM dimming frequency 5~100kHz, supporting 1 percent duty@30kHz

- Programmable internal over-voltage protection (default 36.5V)

LCD Bias Supplies

- LCD bias efficiency: up to 90 percent

- Wide dual output voltage range

Programmable +/-4.0V to +/-6.3V (100mV/step)

Output current up to 80mA

- Programmable supply sequencing

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