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参数资料
| 型号： | FAN5646S700X |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 7/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER BLINKER SC70-5 |
| 标准包装： | 1 |
| 系列： | TinyWire™ |
| 恒定电流： | 是 |
| 拓扑： | 线性，高端 |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | LED 闪烁器 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-70-5 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 1215 (CN2011-ZH PDF) |
| 其它名称： | FAN5646S700XDKR |
Table 5. Brightness Steps During Fade Up/Down (100%)
Table 6. LED Maximum Current, WLCSP or I SET Open
I OUT(DC) = 100% of Full Scale
I SET Bits
I LED(MAX) (mA)
00
Step #
8
9
t ON ( ? s)
169
221
t OFF ( ? s)
3,164
3,112
% of Full
Power
5.1%
6.6%
***
01
10
11
5
10
15
20
10
273
3,060
8.2%
I LED can be programmed with an external R SET resistor to GND
in conjunction with the I SET bits:
I LED ?
R SET ?
? 200
11
12
13
14
15
16
17
18
19
20
339
417
495
586
677
781
885
1,003
1,133
1,276
2,995
2,917
2,839
2,747
2,656
2,552
2,448
2,331
2,201
2,057
10.2%
12.5%
14.8%
17.6%
20.3%
23.4%
26.6%
30.1%
34.0%
38.3%
K
R SET ? 200
K
I LED
Table 7. LED Programming R SET
I SET Bits
00 ***
01
10
11
or
K
123
246
369
492
(1)
21
22
23
24
25
26
27
28
29
1,419
1,563
1,732
1,901
2,070
2,266
2,461
2,669
2,878
1,914
1,771
1,602
1,432
1,263
1,068
872
664
456
42.6%
46.9%
52.0%
57.0%
62.1%
68.0%
73.8%
80.1%
86.3%
R SET should be between 12.1 k W and 100 k W , which
corresponds to a range of 20 mA and 2.5 mA respectively
when the I SET bits are 01 and I LED(max) = 10 mA. To achieve
the highest accuracy using an external R SET , program the
I SET bits for the I LED closest to the desired I LED based on the
I SET values in Table 6. Then calculate the appropriate R SET
for the desired I SET using Equation (1) with the K value for
the chosen I SET bit value from Table 7.
RISE and FALL
The IC creates the rise and fall profiles in Figure 11 by
incrementing or decrementing the PWM dimming value at a
rate determined by the SLEW1 and SLEW2 registers. t RISE or
t FALL are determined by the following equation:
30
31
3,099
3,333
234
0
93.0%
100.0%
t RISE ? 31 ? N RISE ? 3 . 33 ms
t FALL ? 31 ? N FALL ? 3 . 33 ms
(2)
(3)
Changing the Default Values
The default values for the customer-accessible registers
produce the fixed t ON , t OFF , t RISE , and t FALL illustrated in Table 2.
These values can be changed using registers (see Table 9)
accessible through the TinyWire ? single-wire interface.
The PLAY and FOLLOW control bits define the FAN5646 IC
behavior (Table 1) of the CTRL line. In addition, the full-scale
LED current can be changed (Table 6).
LED Full-Scale Current
The full-scale LED current can be set using the I SET bits
(CONTROL[7:6]) to accommodate a wide variety of LEDs.
When CTRL first goes HIGH, the IC determines if an R SET is
where N RISE and N FALL are decimal values in the SLEW
registers (Table 9). Therefore, the maximum time for rise or
fall time to or from full current is:
t RISE/FALL (max) = 1550ms
If the value of N RISE or N FALL is 0, the LED goes to (or from) off
to full brightness with no brightness ramp. Therefore, the
minimum time for controlled brightness stepping to full current
(N RISE = 1) is:
t RISE/FALL (min) = 103 ms
PULSE1 and PULSE2 have independently programmable
t RISE and t FALL .
connected. If the I SET is open or shorted to ground, I LED is set
by an internal reference according to Table 6:
***
Default setting for the I SET bits.
? 2009 Fairchild Semiconductor Corporation
FAN5646 ? Rev. 1.0. 3
7
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FAN5646S700X_11 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Programmable Indicator a??Softa?? LED Blinker with TinyWirea?￠ Single-Wire Interface |
| FAN5646S701X | 功能描述:LED照明驱动器 Prog. Indicator Soft LED Blinker RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| FAN5646S701X_11 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Programmable Indicator a??Softa?? LED Blinker with TinyWirea?￠ Single-Wire Interface |
| FAN5646UC00X | 功能描述:LED照明驱动器 Prog. Indicator Soft LED Blinker RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| FAN5646UC00X_11 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Programmable Indicator a??Softa?? LED Blinker with TinyWirea?￠ Single-Wire Interface |
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