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ADA4099 series of rail-to-rail input/output operational amplifiers from Analog Devices offer robust & precise performance, evaluation board and samples available from Anglia

The ADA4099 series of precision operational amplifiers from Analog Devices are a range of high-performance op amps designed to meet the demands of modern precision applications.

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Upgraded 60V and 5% accuracy cost effective buck LED driver for 3W LEDs from Diodes Inc.

Diode's AP5727 - Boost converter for the bias voltage of small size OLED and LCD displays

The AP8802 is a step-down DC/DC converter designed to drive LEDs with a constant current. Its 60V maximum input voltage allows up to fifteen LEDs in series to be driven. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminates the need for ballast resistors.

The AP8802 switches at frequency up to 500kHz. This allows the use of small size external components, hence minimizing the required PCB area. The exposed pad DFN3030-10 and SO-8-EP high power dissipation packages enables the AP8802 to drive larger numbers of LEDs at increased ambient temperatures.

The AP8802 provides the simplest cost effective solution for driving multiple 3W LEDs

Operating voltage range from 8 to 60V
Up to fifteen LEDs can be connected in series hence higher output power can be delivered.
LED current can be up to 1A
Good match for 3W LED system
Soft-start function
Reduce stress of LED to allow longer lifetime
PWM and DC dimming
Provide flexible scheme to users with different dimming methods
Up to 500kHz high switching frequency
Cost effective and smaller inductor and capacitor can be used
High power package – DFN3030-10 & SOP8-EP
More choices to suit specific designs