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参数资料
| 型号： | AS1109 EB |
| 厂商： | ams |
| 文件页数： | 8/25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 Detailed Description
The AS1109 is designed to drive up to 8 LEDs through a fast serial interface and 8 constant-current output drivers. Furthermore, the AS1109
provides diagnostics for detecting open- or shorted-LEDs, as well as over-temperature conditions for LED display systems, especially LED traffic
sign applications.
The AS1109 contains an 8-bit shift register and an 8-bit data register, which convert serial input data into parallel output format. At AS1109 output
stages, eight regulated current sinks are designed to provide uniform and constant current with excellent matching between ports for driving
LEDs within a wide range of forward voltage variations. External output current is adjustable from 0.5 to 100mA using an external resistor for
flexibility in controlling the brightness intensity of LEDs. The AS1109 guarantees to endure 15V maximum at the outputs.
The serial interface is capable of operating at a minimum of 30 MHz, satisfying the requirements of high-volume data transmission.
Using a multiplexed input/output technique, the AS1109 adds additional functionality to pins SDO, LD and OEN. These pins provide highly useful
functions (open- and shorted-LED detection, over-temperature detection), thus reducing pin count. Over-temperature detection will work on-the-
run, whereas the open- and shorted-LED detection can be used on-the-run or in low-current diagnostic mode (see page 14) .
Figure 9. AS1109 - Block Diagram
+V LED
OUTN0
OUTN1
OUTN2
OUTN3
OUTN4
OUTN5
OUTN6
OUTN7
REXT
Temperature
Detection
8-Bit Open Detec-
tion & Error Reg-
ister
8-Bit Short
Detection & Error
Register
AS1109
Current
Generators
OEN
LD
8-Bit Data
CLK
Register
8-Bit Shift
Detailed
Error
Detection
Global Error
Detection
SDI
Register
Control Logic
SDO
Indicates 8 Bit Path
8.1 Serial Interface
Data accesses are made serially via pins SDI and SDO. At each CLK rising edge, the signal present at pin SDI is shifted into the first bit of the
internal shift register and the other bits are shifted ahead of the first bit. The MSB is the first bit to be clocked in. In error-detection mode the shift
register will latch-in the corresponding error data of temperature-, open-, and short-error register with each falling edge of LD.
Revision 1.21
7 - 24
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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