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A8600 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - WHITE LED BACKLIGHT DRIVER SIX-STRING - AiT Semiconductor

भाग संख्या A8600
समारोह WHITE LED BACKLIGHT DRIVER SIX-STRING
मैन्युफैक्चरर्स AiT Semiconductor 
लोगो AiT Semiconductor लोगो 
पूर्व दर्शन
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<?=A8600?> डेटा पत्रक पीडीएफ

A8600 pdf
AiT Semiconductor Inc.
www.ait-ic.com
 
 
PIN DESCRIPTION
A8600
WHITE LED BACKLIGHT DRIVER
SIX-STRING WITH ACTIVE CURRENT
Pin #
1
2
3
4
5
6
7
Symbol
OSC
ENA
BRT
/SHDN
FB1
FB2
FB3
Top View
Function
Oscillator Frequency Selection Pin. Connect OSC to VCC to set the step-up converter’s
oscillator frequency to 1MHz. Connect OSC to GND to set the frequency to 500kHz.
Float OSC to set the frequency to 750kHz.
Analog Dimming Enable. ENA sets the PWM control mode. Set ENA low to enable
direct DPWM dimming.
Set ENA HIGH to enable analog dimming. In both modes, the duty cycle of the PWM
signal at the BRT input controls the LED current characteristics. See the Dimming
Control section for a complete description.
Brightness Control Input. The duty cycle of this digital input signal controls the LED
current characteristics. The allowable frequency range is 100Hz to 500Hz in analog
dimming mode. The duty cycle can be 100% to 1%. The BRT frequency can go above
500Hz in direct DPWM mode as long as the BRT pulse width is greater than 50μs
minimum. See the Dimming Control section for a complete description.
Shutdown Control Input. The A8600 shuts down when /SHDN is less than 0.8V. Pulling
/SHDN above 2.1V enables the A8600. /SHDN can be connected to the input voltage if
desired.
LED String 1 Cathode Connection. FB1 is the open-drain output of an internal regulator,
which controls current through FB1. FB1 can sink up to 27mA. If unused, connect FB1
to GND.
LED String 2 Cathode Connection. FB2 is the open-drain output of an internal regulator,
which controls current through FB2. FB2 can sink up to 27mA. If unused, connect FB2
to GND.
LED String 3 Cathode Connection. FB3 is the open-drain output of an internal regulator,
which controls current through FB3. FB3 can sink up to 27mA. If unused, connect FB3
to GND.
REV1.0
 
-FEB 2010 RELEASED -
-2-

विन्यास 25 पेज
डाउनलोड[ A8600 Datasheet.PDF ]


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