FAN5606DMPX ,Serial LED Driver with Current-Regulated, Step-Up DC/DC ConverterFeatures Description• Drives Up to Six LEDs in Series The FAN5606 LED driver generates regulated ou ..
FAN5606DMPX ,Serial LED Driver with Current-Regulated, Step-Up DC/DC ConverterApplications Digital Brightness ControlAnalog Brightness ControlV OUTV OUTL = 6.8µ H2.7V to 5.5V 4. ..
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FAN5606DMPX
Serial LED Driver with Current-Regulated, Step-Up DC/DC Converter
Features Drives Up to Six LEDs in Series Pulse Skip PWM Mode of Operation of the Boost Circuit Up to 90% Peak Efficiency No External Schottky Diode Required Up to 25mA Output Built-in DAC for Digital Brightness Control LED’s Current Can be Duty-Cycle-Modulated Digital, Analog, and PWM Brightness Control 2.7V to 5.5V Input Voltage Range 0.5MHz Operating Frequency (8MHz internal clock) Soft Start Low Shutdown Current: I
< 1 LED Short Circuit Protection Minimal External Components Needed Available in an 8-lead MLP Package
Applications Cell Phones Handheld Computers PDAs, DSCs, MP3 Players Keyboard Backlights LED Display
DescriptionThe FAN5606 LED driver generates regulated output cur-
rents from a battery with input voltage varying between 2.7V
to 5V. An internal NMOS switch drives an external inductor,
and a Schottky diode delivers the inductor’s stored energy to
the load. Soft start circuitry prevents excessive current drawn
from the supply during power on. Any number of LEDs can
be connected in series as long as the summed forward volt-
ages do not lead to exceeding the specified operating output
voltage range.
In the FAN5606 device, the internal two-bit D/A converters
provide programmability of the output channel current.
Analog programming of the output current is also possible
in the FAN5606. To do this, ground the “B” pin and connect
a resistor between the “A” pin and a fixed supply voltage.
The output current can then be programmed to any desired
value within its specified range. The analog version uses a
single external resistor to set the current, and to turn the
device ON and OFF. The device is available in an 8-lead
MLP package.
Typical Applications
Digital Brightness ControlAnalog Brightness Control
