Max16818 1.5MHz, 30A High Efficiency LED Driver, Fast

Max16818 1.5MHz, 30A high-efficiency LED driver can quickly respond to LED pulsating current


Max16818 pulse width modulation (PWM) led drive controller adopts compact package, which can provide large output current with the least external components. Max16818 is ideal for synchronous and asynchronous buck topologies, as well as boost, buck boost, SEPIC and Cuk LED driver architectures. Max16818 adopts Maxim's innovative LED drive controller architecture (patent pending), which can realize fast led transient current of up to 20A / µ s and brightness adjustment frequency of 30kHz. The device adopts average current mode control. By optimizing the use of MOSFET with the best charge and on resistance characteristics, the demand for external radiator can be minimized even when the output LED current is up to 30A. True differential detection technology can accurately control the LED current. Wide range brightness adjustment can be easily realized through external PWM signal. The internal voltage regulator and simple external bias device can make the device work in a wide input voltage range of 4.75V to 5.5V or 7V to 28V. The switching frequency range is wide, up to 1.5MHz, allowing the use of small inductors and capacitors. Max16818 has a clock output with a 180 ° phase delay, which can be used to control another LED driver working in staggered phase to reduce the size of input and output filter capacitors and reduce ripple current. Max16818 also provides programmable belch type overcurrent, overvoltage and overheating protection functions. The max16818ete is rated to operate in the extended level temperature range (- 40 ° C to 85 ° C), while the max16818ate operates in the automotive level temperature range (- 40 ° C to 125 ° C). The LED drive controller is available in a lead-free, 0.8mm thick, 5mm x 5mm 28 pin TQFN package with bare pads.

Key characteristics

High current LED drive controller IC, output current up to 30A

Average current mode control

True differential remote detection input

4.75V to 5.5V or 7V to 28V input voltage range

Programmable switching frequency or external synchronization is 125kHz to 1.5MHz

Clock output for 180 ° phase staggering operation

Built in 4A gate driver

Output overvoltage protection and hiccup mode overcurrent protection

Overheating shutdown

Heat enhanced, 28 pin thin QFN package

Operating in the temperature range of - 40 ° C to 125 ° C

Application / use

MAX16818 pdf

Portable and pocket projectors   LCD TV and display backlight   Front panel projector / rear projection TV   Car, bus / truck exterior lights   Automotive emergency lighting and symbol lamps

Max16818 application circuit diagram

Typical working circuit

Max16818 1.5MHz, 30A High Efficiency LED Driver, Fast 1

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