Datasheet > CAT3643

CAT3643

更新时间： 2022-10-20 09:23:42

品牌	Logo	应用领域
安森美 - ONSEMI		驱动器
页数	文件大小	规格书
15页	204K
描述
3-Channel Ultra High Efficiency Quad-Mode LED Driver

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CAT3643 数据手册

CAT3643

Table 4. RECOMMENDED EN/DIM TIMING

(For 2.4 V ≤ V ≤ 5.5 V, over full ambient temperature range −40°C to +85°C.)

Symbol

Name

Conditions

Min

Typ

Max

Units

EN/DIM setup from shutdown

EN/DIM program low time

EN/DIM program high time

EN/DIM low time to shutdown

LED current settling time

SETUP

0.2

1.5

100

PWRDWN

LED

PWRDWN

SETUP

EN/DIM

LED

100%

50%

25%

12.5%

LED

Current

6.25%

Shutdown

3.12%

Shutdown

Figure 3. EN/DIM Digital Dimming Timing Diagram

LED Current Setting

The nominal LED current is set by the external resistor

connected between the RSET pin and ground. Table 5 lists

standard resistor values for several LED current settings.

Table 5. RESISTOR RSET AND LED CURRENT

LED Current (mA)

RSET (kW)

40.0

15.8

7.87

5.23

4.02

3.16

2.67

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