供应XA803 升压驱动恒流IC

升压驱动恒流IC

升压驱动恒流IC

升压驱动恒流IC

The XA803 is. a. set-up. DC-DC. converter.t.hat delivers a regulated output current. The device switches at a 1 .0MHz constant frequency, allowing for the use of small value external inductor and ceramic capacitors.

The XA803 is.targeted.to.be.used.for.d.riving loads up to 1A from a two-cell alkaline battery. The LED current can be programmed by the external .current sense resistor, Rs, connected between the feedback pin (FB) and ground. A low 95mV feedback voltage reduces the power loss in the Rs for better efficiency. With its internal 2A, 100mQ NMOS switch， the device can provide high efficiency even at heavy load. During the shutdown mode, the feedback resistor Rs and the

load are completely disconnected and the current consumption is reduced to less than 1uA.

The XA803 is. available.in.the.6-lead.SOT-23-6 package.

  Features

LED Power Efficiency: up to 90%

1MHz Switching Frequency

Uses small, Low Profile External Components

Low Start-Up Voltage: 0.9V

Low RDS(ON): 100mQ (TYP.)

Open LED Protection

Over Temperature Protection

Low Profile SOT-23-6 Package

Pb-Free Package

  Applications

White LED Torch (Flashlight)

White L ED Camera Flash

DSC(Digital Still Camera)Flash .

Cellular Camera Phone Flash

PDA Camera Flash

Camcorder Torch(Flashlight) Lamp