It has an internal MOSFET that allows switching frequencies up to 300kHz, with the switching frequency determined by an external single resistor. The PWM input operates with duty cycle of 0-100% and frequency of up to several kHz. Documentation Design Note DN449 - Triple LED Driver in 4mm × 5mm QFN Supports LCD Backlights in Buck, Boost or Buck-Boost Modes and Delivers 3000:1 PWM Dimming Ratio DN445 - uModule Qty: OK Cancel Get to Know Us About Richtek News Release Find Products SwitchingRegulators Motherboard Parametric Search Cross Reference Get Support Technical Documents Design Tools Contact Us My Richtek My Profile navigate to this website
The output current is programmed by one external resistor. Please allow 2-3 business days for reply. It provides an integrated 1.5A switch and can be operated with a wide input voltage range from 4.5V to 40V. Linear Technology Chinese Japanese QUALITY CAREERS CONTACT MyLinear PRODUCTS SOLUTIONS DESIGN SUPPORT PURCHASE COMPANY Power Management LED Driver ICs Step-Down (Buck) LED Drivers Overview New & Featured Circuits Videos Blogs
All Rights Reserved. With a current sense amplifier threshold of 190mV, the LED current is programmable with one external current sense resistor. The AL9902 is available in SO-16 and the thermally enhanced DFN6040-12 packages. Zero is the Premier Source for Deep Drawn Cans, Housings and Enclosures with over 30,000 Sizes.
Quick LED Driver Search Input Vin (Min) V Vin (Max) V LED Strings # LEDs InEach String # Strings String Current A LED Voltage Min LED The AL9902 Buck topology creates a constant current through the LEDs providing constant light output. ITT Cannon Introduces CTC Series Environmentally Sealed Connector Footer Employee and Client Login Employee Login Information Footer Social Links Copyright Footer Copyright © 2017 Hanna Lind. http://www.richtek.com/Products/LED%20Driver/DC_DC%20Lighting%20LED%20Driver/RT8482 The unique built-in clamping comparator and filter allow easy low noise analog dimming conversion from PWM signal with only one external capacitor.The RT8482 is available in WQFN-16L 3x3 and SOP-16 packages.
High efficiency is achieved with its 190mV current sensing capability. Step Down Led Driver Please input order qty: Invalid number! The RT8453B is available in a small SOP-8 (Exposed pad) package. The LED brightness can be varied by both Linear and PWM dimming using the AL9902’s LD and PWM_D pins respectively.
RT8482 Status Active Vin (min) (V) 4.5 Vin (max) (V) 36 Vout (max) (V) 48 LED Channels 1 Topology Boost;Buck;Buck-Boost SW Freq (typ) (kHz) 350 Vcs (typ) (mV) 190 Dimming Control Dimming can be either analog or PWM digital signal driven. Constant Current Buck Led Driver RT8453B Status Active Vin (min) (V) 4.5 Vin (max) (V) 40 Vout (max) (V) 40 LED Channels 1 Topology Buck SW Freq (typ) (kHz) 500 Vcs (typ) (mV) 190 Dimming Control Buck Converter Led Driver Circuit All Rights Reserved.
Applications General Illumination Desk Lights and Room Lighting Industrial Backlight/Lighting Constant Current Source Key Spec. & Features Documents Ordering Information Key Spec. useful reference With a maximum operating input voltage of 36V and output voltage up to 48V, the RT8482 is ideal for buck, boost or buck-boost operation.With 350kHz operating frequency, the external inductor and For less urgent requests, please complete our Technical Support Request Form. Applications General Industrial High Power LED Lighting Desk Lights and Room Lighting Building and Street Lighting Industrial Display Backlight Key Spec. & Features Documents Ordering Information Key Spec. Constant Current Buck Converter
With a 500kHz operating frequency, the RT8453B allows all external inductor and input/output capacitors to be small.