PT High Efficiency White LED Driver. FEATURES. ○ V to V Input Voltage Range. ○ 35V Maximum Step-Up Voltage. ○ <1µA Shutdown Mode. Texas Instruments PT DC DC Converters parts available at DigiKey. 30 Aug The PT is a high efficiency step-up DC/DC converter designed for driving multiple strings of up to eight series-connected white LED from a.
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PT detects the voltage of SW pin. As the DC voltage increases, the voltage drop on R2 increases and the voltage drop on R1 decreases.
The PT will then switch at its maximum duty cycle. Company Info About BuyDisplay. If a product was damaged during shipping or the order is incorrect, you must notify us within 2 days of receipt.
The capacitor can be electrolytic, tantalum or ceramic. For some applications, the preferred method of. In order to have accuracy LED current, precision resistor is preferred. Using a DC Voltage. Choose a diode whose maximum. A low ESR capacitor is required to keep the. If the SW pin.
We understand you probably worry whether we still offer the display after your long development time. The LEDs operate at either zero or full current. The LEDs operate at either zero or. We will, at our option, either a repair the product using new or refurbished parts, or b replace the product with a new or refurbished product. The typical frequency pt4110 of the PWM signal should be higher than 20 kHz to avoid the audio noise.
Stock levels are based on item’s sales history. Ceramic capacitors are preferred, but tantalum or low-ESR electrolytic capacitors may also suffice. Open Circuit Protection when the input voltage exceeds 4.
Thus, the LED current decreases. The dimming control using a DC voltage is shown as below. The PT detects the voltage of SW pin. In order to have accuracy LED current.
Make sure that the. There are two different types ppt4110 dimming control. Make sure that the peak inductor current is below 1. The PT has multiple features to protect itself from fault conditions including built-in open load protection, cycle-by-cycle current limit, over temperature shutdown, input under voltage control and integrated soft-start.
However since it absorbs the input switching ot4110 it. The average LED current increases. For most of the applications of the PT, it is recommended to use an inductor of 10uH.
SHARP – datasheet pdf
The LED current is. As the DC voltage increases, the. We fill most small quantity orders immediately.
PT is equal high level of SW pin subtracting the. In some cases an LED may fail, which will result in the feedback voltage always being zero.
Datasheet for Backlight Driver Format.
China Resources Powtech Shanghai Limited. The part will not switch again until the power is. Setting the LED current.