- 您现在的位置：买卖IC网 > PDF目录20251 > AS1116-BSST (ams)IC DVR LED 64LED/7SEG SPI 24QSOP PDF资料下载
参数资料
| 型号： | AS1116-BSST |
| 厂商： | ams |
| 文件页数： | 18/24页 |
| 文件大小： | 0K |
| 描述： | IC DVR LED 64LED/7SEG SPI 24QSOP |
| 标准包装： | 1 |
| 显示器类型： | LED |
| 配置： | 8 x（7 段），64 LED |
| 接口： | SPI 串行 |
| 数字或字符： | 8 位数字 |
| 电流 - 电源： | 335mA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 24-QSOP |
| 包装： | 标准包装 |
| 其它名称： | AS1116-BSSTDKR |
AS1116
Datasheet - Ty p i c a l A p p l i c a t i o n
9 Typical Application
Selecting R SET Resistor Value and Using External Drivers
Brightness of the display segments is controlled via R SET . The current that flows between V DD and I SET defines the current that flows through
the LEDs.
Segment current is about 200 times the current in I SET . Typical values for R SET for different segment currents, operating voltages, and LED volt-
age drop (V LED ) are given in Table 21 & Table 22 . The maximum current the AS1116 can drive is 47mA. If higher currents are needed, exter-
nal drivers must be used, in which case it is no longer necessary that the devices drive high currents.
Note: The display brightness can also be logically controlled (see Intensity Control Register (0x0A) on page 15) .
Table 21. R SET vs. Segment Current and LED Forward Voltage, V DD = 2.7V & 3.3V & 3.6V
I SEG (mA)
1.5V
V LED
2.0V
1.5V
V LED
2.0V
2.5V
1.5V
2.0V
V LED
2.5V
3.0V
40
30
20
10
5k ?
6.9k ?
10.7k ?
22.2k ?
4.4k ?
5.9k ?
9.6k ?
20.7k ?
6.7k ?
9.1k ?
13.9k ?
28.8k ?
6.4k ?
8.8k ?
13.3k ?
27.7k ?
5.7k ?
8.1k ?
12.6k ?
26k ?
7.5k ?
10.18k ?
15.6k ?
31.9k ?
7.2k ?
9.8k ?
15k ?
31k ?
6.6k ?
9.2k ?
14.3k ?
29.5k ?
5.5k ?
7.5k ?
13k ?
27.3k ?
Table 22. R SET vs. Segment Current and LED Forward Voltage, V DD = 4.0V & 5.0V
I SEG
V LED
V LED
(mA)
40
30
20
10
1.5V
8.6k ?
11.6k ?
17.7k ?
36.89k ?
2.0V
8.3k ?
11.2k ?
17.3k ?
35.7k ?
2.5V
7.9k ?
10.8k ?
16.6k ?
34.5k ?
3.0V
7.6k ?
9.9k ?
15.6k ?
32.5k ?
3.5V
5.2k ?
7.8k ?
13.6k ?
29.1k ?
1.5V
11.35k ?
15.4k ?
23.6k ?
48.9k ?
2.0V
11.12k ?
15.1k ?
23.1k ?
47.8k ?
2.5V
10.84k ?
14.7k ?
22.6k ?
46.9k ?
3.0V
10.49k ?
14.4k ?
22k ?
45.4k ?
3.5V
10.2k ?
13.6k ?
21.1k ?
43.8k ?
4.0V
9.9k ?
13.1k ?
20.2k ?
42k ?
Calculating Power Dissipation
The upper limit for power dissipation (PD) for the AS1116 is determined from the following equation:
PD = (V DD x 5mA) + (V DD - V LED )(DUTY x I SEG x N)
Where:
V DD is the supply voltage.
N is the number of segments driven (worst case is 8)
V LED is the LED forward voltage
I SEG = segment current set by RSET
Dissipation Example:
I SEG = 40mA, N = 8, DUTY = 15/16, V LED = 2.2V at 40mA, V DD = 5V
PD = 5V(5mA) + (5V - 2.2V)(15/16 x 40mA x 8) = 0.865W
Thus, for a QSOP-24 package Θ JA = +88°C/W, the maximum allowed T AMB is given by:
T J,MAX = T AMB + PD x Θ JA = 150°C = T AMB + 0.865W x 88°C/W
In this example the maximum ambient temperature must stay below 73.88°C.
(EQ 1)
(EQ 2)
(EQ 3)
(EQ 4)
Revision 1.08
17 - 23
相关PDF资料 |
PDF描述 |
|---|---|
| GSC35DRST-S273 | CONN EDGECARD 70POS DIP .100 SLD |
| GMC35DRST-S273 | CONN EDGECARD 70POS DIP .100 SLD |
| T95R687K6R3HZAL | CAP TANT 680UF 6.3V 10% 2824 |
| RAC10-05SB | CONV AC/DC 90-264VAC 5V 2A |
| VI-J4J-CX-F4 | CONVERTER MOD DC/DC 36V 75W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1116DB-B | 制造商:ams 功能描述: |
| AS1116-DB-BiColor-RedBlue | 制造商:ams 功能描述:AS1116 BiColor Demo Board |
| AS1116-DB-BiColor-RedGreen | 制造商:ams 功能描述:AS1116 BiColor Demo Board |
| AS1116-DB-Blue | 制造商:ams 功能描述:AS1115 Demo Brd w/blue LEDs |
| AS1116-DB-Green | 制造商:AMS 功能描述:Demoboard for AS1116 LED Driver (Green LED's) 制造商:ams 功能描述:AS1116 Demo Brd w/green LED |
发布紧急采购，3分钟左右您将得到回复。