Datasheet > AAT3195IJQ-1

AAT3195IJQ-1

更新时间： 2022-12-15 00:27:59

品牌	Logo	应用领域
AAT		驱动器泵
页数	文件大小	规格书
16页	1938K
描述
4-Channel Charge-Pump LED Driver

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中文翻译

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数据手册

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AAT3195IJQ-1 数据手册

PRODUCT DATASHEET

AAT3195

ChargePump

4-Channel Charge-Pump LED Driver

T_HI

T_OFF

T_LO

T_LAT

EN/SET

n-1

n ≤ 32

Data Reg

n-1

Figure 1: S²Cwire Serial Interface Timing.

AAT3195-1

EN Rising D1-D4 Current D1-D4 Current

AAT3195-2

AAT3195-1

AAT3195-2

Data

Edges

(mA)

30.0

29.0

28.1

27.1

26.1

25.1

24.2

23.2

22.3

21.3

20.3

19.4

18.4

17.4

16.5

15.5

14.5

13.6

12.6

11.6

10.7

9.7

20.5

19.8

19.2

18.5

17.8

17.2

16.5

15.8

15.2

14.5

13.9

13.2

12.5

11.9

11.2

10.6

9.9

9.2

8.6

7.9

7.3

6.6

5.9

5.3

4.6

11 13 15 17 19 21 23 25 27 29 31

S Cwire Serial Interface Data Code

Figure 2: AAT3195-1/-2 Current Control Profile

PWM Control (AAT3195-3 only)

PWM (Pulse Width Modulation) is an industry-standard

technique of controlling LED brightness by modulating

the conduction duty cycle of the LED current. LED bright-

ness is determined by the average value of the PWM

signal multiplied by the LED’s intensity where intensity is

proportional to the LED drive current. A PWM control

signal can be applied to the EN/PWM pin of the AAT3195-

3. By changing the duty cycle of the PWM signal from

100% (logic high) to 10%, LEDs sink current can be pro-

grammed from 30mA to 3.0mA. To save power when not

used or not needed, the AAT3195-3 can be shut down by

holding the EN/PWM pin low for >1ms.

8.7

7.7

6.8

5.8

4.8

3.9

2.9

1.9

4.0

3.3

2.6

2.0

1.3

0.7

0.3

Lastly, Table 2 and Figure 3 illustrate the AAT3195-3's

LED current control profile as a function of a PWM control

signal.

1.0

0.5

Table 1: AAT3195-1/-2 LED Current Setting.

w w w . a n a l o g i c t e c h . c o m

3195.2008.09.1.0

1...7 8 91011 12 13...16

中文翻译

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