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FAN5640 Scheda tecnica(PDF) 1 Page - Fairchild Semiconductor

Il numero della parte FAN5640
Spiegazioni elettronici  FAN5640 Dual High-Side Constant Current Source for High-Voltage Keypad LED Illumination
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Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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March 2012
© 2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5640 • Rev. 1.0.2
FAN5640 — Dual High-Side Constant Current Source
for High-Voltage Keypad LED Illumination
Features
20V Maximum Driver Input Level
Dual Output
25mA Drive Capability per Channel
Two Strings of 2-4 LEDs Each
External Resistor Sets Maximum Current
Fast Turn-On/Off Capability
Low Bias Current
SC70-6 Package
Thermal Shutdown Protection
Applications
Keypad Illumination
Main Display and Sub-Display Illumination
Cell Phones, Smart Phones
Pocket PCs
PDA, DSC, PMP, and MP3 Players
Description
The FAN5640 is designed to illuminate one or two strings
of keypad LEDs with constant high-side current sources.
The device can drive up to four white LEDs in series at a
maximum current of 25mA per channel. If the second
channel is not needed, the channels can be tied
together to boost output current up to 50mA.
An external resistor programs the maximum output
current. Dimming can be accomplished by pulse width
modulation of the enable pin or the input supply rail.
Figure 1. Typical Application
Ordering Information
Part Number
Operating Temperature Range
Package
Packing Method
FAN5640S7X
-40°C to 85°C
SC70-6 2x2.2mm
Tape and Reel


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