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发布者:微桥 发布时间:2010/1/19 阅读:5119次    关键字: EMD2093
EMD2093-PWM Step-Up DC/DC Converter停产


 
General Description
    The EMD2093 designed with high efficiency step up DC/DC converter for driving white LEDs. The device can drive up 8 white LEDs from a single Li-Ion battery or a DC power 2.5V to 5.5V. The EMD2093 uses current mode and pulse-width modulated (PWM) operation. It switches at 1.2MHz and allows using small inductor and both of input/output capacitors. An internal compensation can reduce external component.
    The EMD2093 include under-voltage lockout, current limit, over voltage and thermal shutdown protection. The EMD2093 is available in SOT-26 package.

Features
􀂄 WLEDs supports:
􀂄 Up to 8-LEDs support at VIN=3.7V
􀂄 Up to 40mA current support at VIN=3.7V
􀂄 Low Quiescent Current: 55 μA
􀂄 Over Voltage Protection: 30V
􀂄 Inherently Matched LED Current
􀂄 Shutdown Current < 1μA
􀂄 Reference Voltage 0.245V
􀂄 Efficiency : 85% (Typ) at VIN=5.0V
􀂄 PWM Dimming Control
􀂄 Internal Soft Start and Compensation
􀂄 800mA Internal power MOSFET Switch
􀂄 Low Profile SOT-26 Package
Applications
􀂄 Mobile Phone
􀂄 Digital Still Cameras
􀂄 Portable applications
􀂄 MP3 Players
􀂄 GPS Receivers

Boost White LED Driver
Part Number
Topology
Vin Min (V)
Vin Max (V)
Iout (mA)
Iq (uA)
fosc (MHz)
Brightness Control
Efficiency (%)
Package
Datasheet

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