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| 型号： | AS1109 EB |
| 厂商： | ams |
| 文件页数： | 15/25页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL AS1109 |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 0.5 ~ 100 mA |
| 输出及类型： | 8，非隔离 |
| 输出电压： | 0 ~ 15 V |
| 特点： | 过热保护，开路 LED，短路 LED，诊断 |
| 输入电压： | 3 ~ 5.5 V |
| 已供物品： | 板 |
| 已用 IC / 零件： | AS1109 |
AS1109
Datasheet - D e t a i l e d D e s c r i p t i o n
8.6.3
Detailed Shorted-LED Error Report
The detailed shorted-LED error report can be read out immediately after global error mode has been run (see Global Error Mode on page 10) .
Figure 17. Detailed Shorted-LED Error Report Timing Diagram
OEN
Global Flag Readout
t TESTING
Detailed Error Report Readout
LD
t SU(ERROR)
t H(L)
CLK
t GSW(ERROR)
t GSW(ERROR)
t GSW(ERROR)
t P4
SDI
t SW(ERROR)
DBit7
DBit6
DBit5
DBit4 DBit3
New Data Input
DBit2
DBit1
DBit0
Don’t
Care
SDO
T FLAG O FLAG
S FLAG
SBit7
SBit6
SBit5
SBit4
SBit3
SBit2
SBit1
SBit0
Don’t
Care
t P4
Shorted-LED Error Report Output
t P1
Detailed Shorted-LED Error Report Example
Consider a case where five AS1109s are cascaded in one chain. A 1 indicates a LED is on, a 0 indicates a LED is off, and an X indicates a
shorted LED. This test is used with a test pattern where all LEDs are on at test time. Additionally, this test should be run after starting low-current
IC1:[11111XX1] IC2:[11111111] IC3:[11111111] IC4:[111X1111] IC5:[11111111]
IC2 has two shorted LEDs and IC4 has one shorted LED switched on due to input. 5*8 clock cycles are needed to write the entire error code out.
The detailed error report would look like this:
Input Data: 1 1 1 1 1 1 1 1
LED Status: 1 1 1 1 1 X X 1
Failure Code: 1 1 1 1 1 0 0 1
11111111
11111111
11111111
11111111
11111111
11111111
11111111
111X1111
11101111
11111111
11111111
11111111
Showing IC1 as the device with two shorted LEDs at position 6 and 7, and IC4 with one shorted LED at position 4.
Note: In an actual report there are no spaces in the output. LEDs turned off during test time cannot be tested.
8.6.4
Low-Current Diagnostic Mode
To run the open- or shorted-LED test, a test pattern must be used that will turn on each LED to be tested. This test pattern will cause a short
flicker on the screen while the test is being performed. The low-current diagnostic mode can be initiated prior to running a detailed error report to
reduce this on-screen flickering.
Note: Normally, displays using such a diagnosis mode require additional cables, resistors, and other components to reduce the current. The
AS1109 has this current-reduction capability built-in, thereby minimizing the number of external components required.
Low-current diagnostic mode can be initiated via 3 clock pulses during error-detection mode. After the falling edge of LD, a test pattern displaying
all 1s can be written to the shift register which will be used for the next error-detection test.
On the next falling edge of OEN, current is reduced to I LC . With the next rising edge of OEN the current will immediately increase to normal
levels and the detailed error report can be read out entering error-detection mode.
Revision 1.21
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相关PDF资料 |
PDF描述 |
|---|---|
| AS1110 EB | BOARD EVAL AS1110 |
| AS1112 EB | BOARD EVAL AS1112 |
| AS1115 DB-YELLOW | BOARD DEMO AS1115 YELLOW |
| AS1116 DB-YELLOW | BOARD DEMO AS1116 YELLOW |
| AS3691A EB | BOARD EVAL AS3691A |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1109-QF_EK_ST | 功能描述:AS1109 8, Non-Isolated Output LED Driver Evaluation Board 制造商:ams 系列:- 零件状态:有效 电流 - 输出/通道:100mA 输出和类型:8，非隔离 电压 - 输出:15V 特性:过热保护，开路 LED，短路 LED，诊断 电压 - 输入:3 V ~ 5.5 V 所含物品:板 使用的 IC/零件:AS1109 标准包装:1 |
| AS110R0JLF | 制造商:TT Electronics / IRC 功能描述:AS110R0JLF |
| AS110R2FLF | 制造商:TT Electronics / IRC 功能描述:AS110R2FLF |
| AS110R2HLF | 制造商:TT Electronics / IRC 功能描述:AS110R2HLF |
| AS110R2JLF | 制造商:TT Electronics / IRC 功能描述:AS110R2JLF |
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