Серия LED-драйверы интегральные, контроллеры управления светом RT8575

Richtek

Общие характеристики

 Раздел LED-драйверы интегральные, контроллеры управления светом
Корпус WDFN16

Документация на серию RT8575

® RT8575 4-String White LED Driver with Boost Regulator General Description Features The RT8575 is a high efficiency LED driver with 40V I/O support. It is designed for LCD panel that employs an array of LEDs as the lighting source. An integrated switch current mode Boost controller drives four strings in parallel and supports up to 18 pieces of LEDs per string. The internal current sinks support typical ±1% current mismatching for excellent brightness uniformity in each LED string. To provide enough headroom for the operating of current sink, Boost controller monitors the minimum voltage of feedback pins and regulates an optimized output voltage for power efficiency. z Input Operating Voltage Range 4.2V to 24V z 60V Maximum Output Voltage Adjustable Switching Frequency : 150kHz to 500kHz Support Up to 4 LED Strings 50mA to 150mA LED Current Per Channel 1% Typical LED Current Accuracy 1% Typical LED Current Matching Programmable Over Voltage Protection Built-in Soft-Start, OTP LED Short/Open Detection RoHS Compliant and Halogen Free The RT8575 has a wide input voltage operating range from 4.2V to 24V and provides adjustable 50mA to 150mA LED current. The internal 150mΩ, 60V power switch with current-mode control provides cycle-by-cycle over current protection. RT8575 also integrates PWM dimming function for accurate LED current control. The input PWM dimming frequency can operate from 120Hz to 1kHz without inducing any inrush current in LEDs or inductor. The switching frequency of RT8575 is adjustable from 150kHz to 500kHz, which allows the trade-off between efficiency and component size. Applications The RT8575 is available in WDFN-16L 5x5 and DIP-16 (BW) packages to achieve optimized solution for PCB space. z z z z z z z z z z White LED Backlighting Ordering Information RT8575 Package Type QW : WDFN-16L 5x5 (W-Type) N : DIP-16 (BW) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are : ` RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. ` Suitable for use in SnPb or Pb-free soldering processes. Simplified Application Circuit D1 L1 VIN VOUT CIN1 COUT R1 LX VIN CIN2 RT8575 ROVP2 ISET Chip Enable EN CCOMP RT RSW : : : : : : GND Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS8575-00 January 2013 : : : CH1 CH2 CH3 CH4 COMP RCOMP : : : RISET PWM PWM Signal ROVP1 OVP is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 PDF
Документация на RT8575GQW 

4-String White LED Driver with Boost Regulator The RT8575 is a high efficiency LED driver with 40V I/O support. It is designed ,for LCD panel that employs an array of LEDs as the lighting source. An ,integrated switch current mode Boost ...

Дата модификации: 04.10.2018

Размер: 352.1 Кб

17 стр.

    Товары серии RT8575

    Наименование i Упаковка
    RT8575GQW (RICHTEK)