RT8561AGQW

Richtek
® RT8561A High Voltage 8-CH LED Driver General Description Features The RT8561A is a 40V 8-CH LED driver capable of delivering 30mA to each channel with 10 LEDs (3.6V per diode), total of 80 LEDs with one driver. The RT8561A is a current mode boost converter operated at 1MHz, wide VIN range covers from 6V to 24V and the on-chip current switch is rated at 2.5A. z z z z z z z z z z z Appl...
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® RT8561A High Voltage 8-CH LED Driver General Description Features The RT8561A is a 40V 8-CH LED driver capable of delivering 30mA to each channel with 10 LEDs (3.6V per diode), total of 80 LEDs with one driver. The RT8561A is a current mode boost converter operated at 1MHz, wide VIN range covers from 6V to 24V and the on-chip current switch is rated at 2.5A. z z z z z z z z z z z Applications z z z UMPC and Notebook Computer Backlight GPS, Portable DVD Backlight Desk Lights and Room Lighting Pin Configurations Note : Lead Plating System G : Green (Halogen Free and Pb Free) Richtek products are : ` RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. ` GND SW SW GND 21 20 19 18 VCC LED2 2 17 CREG LED3 3 16 LED8 LED4 4 15 LED7 LED5 5 14 LED6 OVP 6 13 EN GND 25 7 8 9 10 11 12 DCTL Package Type QW : WQFN-24L 4x4 (W-Type) 22 ACTL RT8561A 23 1 RISET Ordering Information 24 LED1 SS The RT8561A is packaged with a tiny footprint package of WQFN-24L 4x4 packages. GND (TOP VIEW) GND Other protecting features include programmable output over voltage protection, LED current limit, PWM switch current limit and thermal shutdown. z VC The 1.5% matched LED currents on all channels are simply programmed with a resistor or a current sink. Both analog dimming and digitally controlled PWM dimming are supported by the RT8561A. Analog dimming is linearly controlled by an external voltage. With an on-chip output clamping amplifier and a 300kΩ resistor, PWM dimming signal is easily low-pass filtered to an analog dimming signal with one external capacitor for noise-free PWM dimming. A very high contrast ratio true digital PWM dimming can be achieved by driving ACTL pin with a PWM signal. z NC The PWM output voltage loop regulates the LED pins to 0.6V with an auto-adjustment circuit allowing voltage mismatches between LED strings. The RT8561A automatically detects and disconnects any unconnected and/or broken strings during operation from PWM loop to prevent VOUT from over voltage. z High Voltage : VIN up to 24V, VOUT up to 40V, Driving up to 80 x 3.6V LEDs (10 each channel) Channel Current Programmable 10mA to 30mA and Matched to 1.5% Current Mode PWM 1MHz Boost Converter Easy Analog and Digital Dimming Control Programmable Soft Start Automatic Detecting Unconnected and/or Broken Channel Programmable Over Voltage Protection Disconnects LED in Shutdown Providing High Accuracy Digital Dimming by PWM at ACTL Pin VIN Under Voltage Lockout Over Temperature Protection Current Limiting Protection Small 24-Lead WQFN Package RoHS Compliant and Halogen Free WQFN-24L 4x4 Marking Information CZ= : Product Code CZ=YM DNN YMDNN : Date Code Suitable for use in SnPb or Pb-free soldering processes. Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS8561A-02 April 2012 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 PDF
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High Voltage 8-CH LED Driver The RT8561A is a 40V 8-CH LED driver capable of delivering 30mA to each channel ,with 10 LEDs (3.6V per diode), total of 80 LEDs with one driver. The RT8561A is ,a current mode boost converter operated at 1MH...

Дата модификации: 04.10.2018

Размер: 338.3 Кб

16 стр.

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