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AAT3193IJQ-1

更新时间： 2024-02-13 20:04:29

品牌	Logo	应用领域
ANALOGICTECH		驱动器驱动程序和接口接口集成电路泵
页数	文件大小	规格书
17页	632K
描述
Low-Cost, 2-/3-Channel Charge-Pump LED Drivers

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技术参数
数据手册

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AAT3193IJQ-1 技术参数

生命周期：	Not Recommended	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.46
Is Samacsys：	N	Base Number Matches：	1

AAT3193IJQ-1 数据手册

AAT3192/93

Low-Cost, 2-/3-Channel

Charge-Pump LED Drivers

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.

S Cwire Serial Interface

(AAT3192/93-1/-2/-3 only)

The LED output current of AAT3192/93 is con-

trolled by AnalogicTech's S 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

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.

LED reliability. The S Cwire interface relies on the

number of rising edges to the EN/SET pin to set the

EN/SET rising edges, followed by a pause with

T_HI

T_OFF

T_LO

T_LAT

EN/SET

n-1

n ≤ 16

Data Reg

n-1

Figure 1. S C Serial Interface Timing

20.00

EN Rising

Edges

D1-D3

Data

Current (mA)

15.00

18.7

10.00

17.3

5.00

14.7

0.00

13.3

10 11 12 13 14 15 16

10.7

9.3

6.7

5.3

2.7

1.3

0.63

S²Cwire Interface Data Code

Figure 2: AAT3192/93-1 Current Control Profile

Table 1: AAT3192/93-1 LED Current Settings

3193.2007.05.1.0

1...7 8 91011 12 13...17

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