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參數(shù)資料
| 型號： | CAT3612 |
| 英文描述： | Programmable 300mA Camera Flash LED Driver |
| 中文描述： | 可編程的300mA相機(jī)閃光燈LED驅(qū)動器 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 461K |
| 代理商： | CAT3612 |
CAT3612
Doc. No. 5016 Rev. A
10
2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
LED Current Setting
Fig
ure 1 shows the EN/DIM input timing diagram for
setting the LED currents. The EN/DIM set-up time
requires the signal to be held high for 10
μ
s or longer
to ensure the initialization of the driver at power-up.
Each subsequent pulse on the EN/DIM (300ns to
200
μ
s pulse duration) steps down the LED current
from full scale of 150mA to zero with nearly 5mA
resolution. The selection of the LED current per
channel is shown in Table 1. Consecutive pulses
should be separated by 300ns or longer. Pulsing
beyond the 0mA level restores the current level back
to full scale and the cycle repeats. Pulsing frequencies
from 5kHz up to 1MHz can be supported during
dimming operations. When the EN/DIM is held low for
1.5ms or more, the CAT3612 enters the shutdown
mode and draws “zero” current.
For applications with a single LED connected to one
LED pin only, the unused LED pin must be tied to
VOUT, as shown on Figure 3.
Figure 3. Single LED on one LED pin
Figure 4. Application with 2 LEDs
Table 1. Selection of LED current per Channel
Number of pulses
on EN/DIM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
LED current
(mA)
150
145
140
135.5
131
126
121
116
111
106.5
101.5
97
92
87
82
77.5
72.5
68
63
58
53
48.5
43.5
39
34
29
24
19
14.5
10
5
0
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| CAT3612HV2-T2 | Programmable 300mA Camera Flash LED Driver |
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| CAT3616HV4-T2 | 6-Channel Charge Pump LED Driver with EZDimTM |
| CAT3626HS4-T2 | 6-Channel LED Driver with I2C Interface |
| CAT3626HV4-T2 | 6-Channel LED Driver with I2C Interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT3612_08 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Programmable 300mA Camera Flash LED Driver |
| CAT3612HV2-GT2 | 功能描述:LED照明驅(qū)動器 LED Driver,Charge pump,2 ch RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| CAT3612HV2-T2 | 功能描述:LED照明驅(qū)動器 Prog Camera Flash LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| CAT3614 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Channel 1-Wire LED Driver in 3x3mm Package |
| CAT3614_08 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Channel 1-Wire LED Driver in 3 x 3mm Package |
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