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