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.
Stock levels are based on item’s sales history. An input capacitor is required to supply the AC ripple. If the SW pin. As the DC voltage increases, the. Make sure that the. Evidence of damage caused by operating outside of specified temperature range. The rated average forward current needs.
In order to have accuracy LED current. Its low mV feedback voltage reduces power loss and improves efficiency. Selecting the Input Capacitor An input capacitor is required to supply the AC ripple current to the inductor, while limiting noise at the input source. The typical frequency range of the PWM signal should be higher than 20 kHz to avoid the audio noise.
Choose a diode whose maximum reverse voltage rating is greater than the maximum output voltage.
PTHigh Efficiency White LED Driver
The feedback reference is mV. For most of the applications of the PT, it is recommended to use an inductor of pt41100. In some cases an LED may fail, which will result in the feedback voltage always being zero.
However since it absorbs the input switching current it requires an adequate ripple current rating. So you don’t have to worry even your research time is very long.
Choose a diode whose maximum. In order to have accuracy LED current, precision resistor is preferred.
Brand new original POWTECH LED driver IC PT4110
As the DC voltage increases, the voltage drop on R2 increases and the voltage drop on R1 decreases. The average LED current increases. The LEDs operate at either zero or full current. Thus, the LED current decreases. The output capacitor is required to maintain the DC.
Use a capacitor with P4t110 current rating greater than the inductor ripple current. The output of PT is equal high level of SW pin subtracting the forward voltage of the Schottky diode. Warranty is void and no repair or replacement is granted under the following conditions:. There are two different types of dimming control.
LED Backlight Driver IC Chip PT in SOT Package
The rated average forward current needs to be equal to or greater than the load current. Please, log in or register. Backorder notices are listed on your shopping cart. In some cases an LED may fail, which.
The typical ph4110 range. Open Circuit Protection when the input voltage exceeds 4. The PT will then switch at its maximum duty cycle boosting the output voltage higher and higher. PT detects the voltage of SW pin. China Resources Powtech Shanghai Limited. The characteristic of the output capacitor also affects the stability of the regulation control system. Selecting the Input Capacitor.
The dimming control using a DC voltage is shown as below. Ceramic capacitors are preferred, but tantalum or low-ESR electrolytic capacitors may also suffice. Selecting the Output Capacitor. 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. If a product was damaged during shipping or the order is incorrect, you must notify us within 2 days of receipt.
Low ESR capacitors are preferred to. PT is equal high level of SW pin subtracting the. We fill most small quantity orders immediately.
We promise the long terms continuity supply and would never end supply. For some applications, the preferred method of. Write Your Own Review Only registered users can write reviews.