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参数资料
| 型号： | AS1122-BQFT |
| 厂商： | ams |
| 文件页数： | 14/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR 12-CH W/DELAY 24-TQFN |
| 标准包装： | 1 |
| 系列： | * |
AS1122
Datasheet - D e t a i l e d D e s c r i p t i o n
For n devices in a chain only one identifier needs to be send to set all n devices to the same register setting.
Figure 30. Command Data for n-devices
Setting Dot Correction
The AS1122 can perform independent fine-adjustments to the output current of each channel. Dot correction is used to adjust brightness devia-
tions of LEDs connected to the output channels (OUT0:OUT11).
The device powers up with the following default settings: DC = 0 and GS = 0.
The 12 channels can be individually programmed with a 6-bit word for Dot Correction. The channel output can be adjusted in 64 steps from 0 to
100% of the maximum output current (I MAX ). The output current for each OUT n channel can be calculated as:
I OUT n = I MAX x
DC n
63
(EQ 1)
Where:
I MAX is the maximum programmable output current for each output;
DC n is the programmed dot correction value for output (DC n = 0 to 63);
n = 0 to 11
Dot correction data are simultaneously entered for all channels. The complete dot correction data format consists of 12 x 6-bit words, which
forms a 72-bit serial data packet (see Figure 31) and 8-bit for the identifier. Channel data is put on one by one, and the data is clocked in with the
MSB first.
Figure 31. Dot Correction Data Packet Format
The Dot Correction data is only valid if the exact identifier byte was send. Otherwise the data will be ignored.
Setting Greyscale Brightness (PWM)
The brightness of each channel output can be adjusted using a 12 bits-per-channel PWM control scheme which results in 4096 brightness steps,
from 0% to 100% brightness. The brightness level for each output is calculated as:
%Brightness =
GS n
4095
x 100
(EQ 2)
Where:
GS n is the programmed greyscale value for OUT n (GS n = 0 to 4095);
n = 0 to 11 greyscale data for all outputs.
The device powers up with the following default settings: GS = 0 and DC = 0.
www.austriamicrosystems.com/LED-Driver-ICs
Revision 1.00
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| AS1122-XXX-I-A1-D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1122-XXX-I-A1-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1122-XXX-I-A2-D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1122-XXX-I-A2-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1122-XXX-I-A3-D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
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