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參數(shù)資料
| 型號(hào)： | SC604AIMLTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Low Noise, High Efficiency Regulated White LED Driver |
| 中文描述： | 低噪聲，高效率調(diào)控白光LED驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 9/18頁(yè) |
| 文件大?。?/td> | 375K |
| 代理商： | SC604AIMLTRT |
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9
2005 Semtech Corp.
www.semtech.com
SC604A
POWER MANAGEMENT
Methods for Setting LED Current
There are four methods for setting and adjusting the LED current
outlined here. The methods are:
1) R
only
2) Analog Reference V
3) NMOS switched parallel resistors
4) PWM Input
Method 1.
The most basic means of setting the LED current is
with a resistor connected from ISET to GND, as shown in the
application circuit on Page 1. The resistor R
establishes the
reference current needed for a constant LED current. Values of
R
for a fixed LED current are given in Table 2 and also in the
below graph, “Typical R
Resistance vs. LED Current”. Methods
2 and 3 on page 10 are for setting the LED current allow for
brightness control.
Table 2 - Resistor Value Selection
R
E
S T
e
u
V
]
m
[
D
E
L
R
k
]
E
S T
k
t
n
d
n
u
V
e
e
a
N
d
e
d
d
d
u
V
e
n
a
e
e
c
n
%
%
5
1
3
9
1
3
9
%
0
1
1
7
4
0
7
4
%
2
2
7
3
2
7
3
2
%
0
3
5
5
1
4
5
1
%
6
5
0
9
1
9
%
0
0
1
5
4
5
4
%
0
5
1
3
8
3
6
3
%
7
0
2
0
2
0
2
%
0
0
3
5
1
5
1
%
0
Typical R
SET
Resistance vs. LED Current
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
0.5
1
1.5
2
2.5
3
3.5
4
4.5
LED Current [mA]
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
R
S
]
相關(guān)PDF資料 |
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|---|---|
| SC604EVB | Low Noise, High Efficiency Regulated White LED Driver |
| SC605-R | Speech And Music Processor |
| SC605-RL1 | Speech And Music Processor |
| SC605 | Charge Pump Flash LED Driver |
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| SC604EVB | 制造商:SEMTECH 制造商全稱(chēng):Semtech Corporation 功能描述:Low Noise, High Efficiency Regulated White LED Driver |
| SC604-R | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Speech And Music Processor |
| SC604-RL1 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Speech And Music Processor |
| SC605 | 制造商:SEMTECH 制造商全稱(chēng):Semtech Corporation 功能描述:Charge Pump Flash LED Driver |
| SC605EVB | 制造商:SEMTECH 制造商全稱(chēng):Semtech Corporation 功能描述:Charge Pump Flash LED Driver |
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