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參數(shù)資料
| 型號： | AAT3192IJQ-4 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | Low-Cost, 2-/3-Channel Charge-Pump LED Drivers |
| 中文描述： | 低成本，2-/3-Channel電荷泵LED驅(qū)動器 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大小： | 400K |
| 代理商： | AAT3192IJQ-4 |
AAT3192/93
Low-Cost, 2-/3-Channel
Charge-Pump LED Drivers
10
3193.2007.05.1.0
S
2
Cwire Serial Interface
(AAT3192/93-1/-2/-3 only)
The LED output current of AAT3192/93 is con-
trolled by AnalogicTech's S
2
Cwire serial interface.
Since the LED current is programmable, no PWM
or additional control circuitry is needed to control
LED brightness. This feature greatly reduces the
burden on a microcontroller or system IC to man-
age LED or display brightness, allowing the user to
"set it and forget it." With its high-speed serial inter-
face (1MHz data rate), the LED current can be
changed quickly and easily. Also the non-pulsating
LED current reduces system noise and improves
LED reliability. The S
2
Cwire interface relies on the
number of rising edges to the EN/SET pin to set the
register. A typical write protocol is a burst of
EN/SET rising edges, followed by a pause with
EN/SET held high for at least t
LAT
(500μs). The pro-
grammed current is then seen at the current sink
outputs. When EN/SET is held low for an amount
of time longer than t
OFF
(500μs), the AAT3192/93
enters into shutdown mode and draws less than
1μA from the input and the internal data register is
reset to zero.
The AAT3192/93-1/2/3's serial interface reduces the
LED current on each rising pulse of the enable input.
If the AAT3192/93 is in shutdown, the first rising edge
of the EN/SET input turns on the LED driver to the
maximum current. Successive rising edges decrease
the LED current as shown in Table 1 and Figure 2 for
the AAT3192/93-1. For the AAT3192/93-2, Table 2
and Figure 3 illustrate an 8-step LED current control
profile. For the AAT3192/93-3, Table 3 and Figure 4
illustrate a 4-step LED current control profile.
Figure 1. S
2
C Serial Interface Timing
1
EN/SET
2
n-1
n
≤
16
Data Reg
0
n-1
0
T
HI
T
LO
T
LAT
T
OFF
Table 1: AAT3192/93-1 LED Current Settings
Figure 2: AAT3192/93-1 Current Control Profile
S
2
Cwire Interface Data Code
D
0.00
5.00
10.00
15.00
20.00
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
EN Rising
Edges
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
D1-D3
Data
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Current (mA)
20
18.7
17.3
16
14.7
13.3
12
10.7
9.3
8
6.7
5.3
4
2.7
1.3
0.63
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3192IJQ-4-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2-Channel Charge-Pump LED Driver |
| AAT3193 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:3-Channel Charge-Pump LED Driver |
| AAT3193IJQ-1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:3-Channel Charge-Pump LED Driver |
| AAT3193IJQ-1-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3193IJQ-2 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:3-Channel Charge-Pump LED Driver |
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