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CAT3647 Folha de dados(PDF) 3 Page - Catalyst Semiconductor

Nome de Peças CAT3647
Descrição Electrónicos  3-Channel Ultra High Efficiency Quad-Mode??LED Driver with 32 Dimming Levels
PDF  14 Pages
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Fabricante Electrônico  CATALYST [Catalyst Semiconductor]
Página de início  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT3647 Folha de dados(HTML) 3 Page - Catalyst Semiconductor

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CAT3647
© Catalyst Semiconductor, Inc.
3
Doc. No. MD-5030 Rev. A
Characteristics subject to change without notice
RECOMMENDED EN/DIM TIMING
For 2.4V
≤ VIN ≤ 5.5V, over full ambient temperature range -40ºC to +85ºC.
Symbol
Name
Conditions
Min
Typ
Max
Units
TLO
EN/DIM program low time
0.2
100
μs
THI
EN/DIM program high time
0.2
μs
TPWRDWN
EN/DIM low time to shutdown
1.5
ms
TLED
LED current settling time
40
μs
Figure 1. EN/DIM Digital Dimming Timing Diagram
LED Current Setting
The full scale LED current is set by the external
resistor connected between the RSET pin and
ground. Table 1 lists standard resistor values for
several LED current settings.
Table 1. Resistor RSET and LED Current
Full Scale
LED Current [mA]
RSET [kΩ]
2
37.4
5
14.7
10
7.50
15
4.99
20
3.74
25
3.00
30
2.49
THI
TLO
TPWRDWN
TLED
100%
EN/DIM
LED
Current
Shutdown
Shutdown
97% 93%
3%
0%
100%
32 Levels



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