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ML0308AMRG ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 3 Page - Minilogic Device Corporation Limited

๋ถ€ํ’ˆ๋ช… ML0308AMRG
์ƒ์„ธ๋‚ด์šฉ  Tiny Package, High Efficiency, White LED Driver and Step-up DC/DC Converter
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์ œ์กฐ์‚ฌ  MINILOGIC [Minilogic Device Corporation Limited]
ํ™ˆํŽ˜์ด์ง€  http://www.minilogic.com.hk
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ML0308 Preliminary
______________________________________________________________________________________________________
3/9
Rev. B, July 2005
PIN FUNCTION DESCRIPTION
Pin
Description
LX
(Pin 1)
Switch Pin. This is the drain of the internal power MOSFET. Minimize the metal trace area
connected to this pin to minimize EMI.
GND
(Pin 2)
Ground. Tie this pin directly to the local ground plane.
FB
(Pin 3)
Feedback Pin. Set the output voltage by selecting values for R1 and R2:
V
R
R
R
VOUT
198
.
0
2
2
1
ร—
+
=
(ML0308A) or
V
R
R
R
VOUT
23
.
1
2
2
1
ร—
+
=
(ML0308B)
CE
(Pin 4)
This pin is the chip-enable Pin. Ground this pin to shutdown the chip. Apply a clock with
different duty ratio to control brightness of the LEDs.
VIN
(Pin 5)
The external voltage supply is connected to this pin. A high quality reservoir capacitor must
be connected across pin 5 and pin 2 (ground) to achieve the specified output voltage
parameters. A 4.7uF/6.3 V, low ESR capacitor must be connected as close as possible across
pin 5 and pin 2 (ground).
BLOCK DIAGRAM โ€“ ML0308A


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