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CAT3606HS4 датащи(PDF) 9 Page - Catalyst Semiconductor

номер детали CAT3606HS4
подробное описание детали  6-Channel Low Noise Charge Pump White LED Driver
PDF  11 Pages
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производитель  CATALYST [Catalyst Semiconductor]
домашняя страница  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT3606HS4 датащи(HTML) 9 Page - Catalyst Semiconductor

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CAT3606
9
Doc. No. 5009, Rev. B
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
RECOMMENDED LAYOUT
When the driver is in the 1.5x charge pump mode,
the 1MHz switching frequency operation requires
to minimize trace length and impedance to ground
on all 4 capacitors. A ground plane should cover the
area on the bottom side of the PCB opposite to the
IC and the bypass capacitors. Capacitors Cin and
Cout require short connection to ground which can
be done with multiple vias as shown on Figure 2. A
square copper area matches the QFN16 exposed
pad (GND) and must be connected to the ground
plane underneath. The use of multiple via will
improve the heat dissipation.
Figure 2: PCB Layout
TYPICAL CHARACTERISTICS
VIN = 3.6V, EN = VIN,
ENM = ENS = GND, C
IN = COUT = 1µF, TAMB = 25˚C, unless otherwise specified.
RSET Pin Voltage vs. Temperature
0
1
2
3
4
5
0
100
200
300
400
500
1x mode
1.16
1.18
1.20
1.22
1.24
-50
-25
0
25
50
75
100
125
TEMPERATURE [
°C]
OUTPUT CURRENT [mA]
Foldback Current Limiting
PWM Dimming at 1kHz on ENM and ENS



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