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DC-DC LED Drivers | NCP5030

LED Driver, Buck-Boost Converter, Fixed Frequency, PWM

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Overview

The NCP5030 is a fixed frequency PWM buck-boost converter optimized for constant current applications such as driving high-powered white LED. The buck-boost is implemented in an H-bridge topology and has an adaptive architecture where it operates in one of three modes: boost, buck-boost, or buck depending on the input and output voltage condition. This device has been designed with high-efficiency for use in portable applications and is capable of driving in DC up to 900 mA into a high power LED for flashlight / torch applications. To protect the device cycle-by-cycle current limiting and a thermal shutdown circuit have been incorporated as well as output over-voltage protection. The 700 kHz switching frequency allows the use of a low value 4.7 µH and ceramic capacitors.

  • LED Drive from Alkaline Batteries
  • Flash Lights
  • Efficiency: 87% at 500 mA and 3.3 V VIN
  • Internal Synchronous Rectifier, No Schottky Diodes
  • Adjustable Switching Limit Current to Optimize inductor size
  • 0.3 µA Shut-down Control with True-Cut off
  • Input Voltage Range from 2.7 V to 5.5 V
  • 200 mV Feedback Voltage
  • Output Over-voltage and Thermal Shut Down Protection

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Reference Price

NCP5030MTTXG

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Lifetime

CAD Model

Pb

A

H

P

WDFN-12

506AY

1

260

REEL

3000

N

Step-Up/Step-Down

2.7

5.5

5.5

1200

700

$1.3464

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