- 您现在的位置：买卖IC网 > Datasheet目录961 > AS3691A EB (ams)BOARD EVAL AS3691A Datasheet资料下载
参数资料
| 型号： | AS3691A EB |
| 厂商： | ams |
| 文件页数： | 13/23页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL AS3691A |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 400mA |
| 输出及类型： | 4，非隔离 |
| 输出电压： | 最高 15V |
| 输入电压： | 10 ~ 12 V |
| 已供物品： | 板 |
| 已用 IC / 零件： | AS3691A |
AS3691
Datasheet
8 Detailed Functional Description
The AS3691 includes four high precision current sources (sinks). Each current source is set by an external
resistor. For internal power supply an internal shunt regulator is used. Optionally an additional 5V device can be
supplied as well with this shunt regulator.
The current sources are individually controlled by four ON inputs. If the inputs ON are high or left open, then the
current is set as follows:
ICURR 1 ? 4 =
250 mV
Ri 1 ? 4
Setting the input ON to low the current is
ICURR 1 ? 4 =
10. 0 mV
Ri 1 ? 4
for part numbers starting
with AS3691A
The current is not zero to avoid high voltage jumps on the LEDs and supplies and therefore reduce EMI.
ICURR 1 ? 4 =
0.0 mV
Ri 1 ? 4
+ I 1 ? 4 = I 1 ? 4
for part numbers starting with AS3691B; I 1-4 is the parallel current
(see above Figure 11)
8.1 Shunt Regulator
The supply of the AS3691 is generated from the high voltage supply. To obtain a 5V regulated supply, a series
resistor Rvdd is used together with an internal zener diode (shunt regulator principle). An external capacitor
Cvdd is used to filter the supply on the pin VREG.
The external resistor Rvdd has to be choosen according to the following formula:
Rvdd =
VDD MIN ? VVREGINT MAX
IVREG MAX
VDD MIN is the minimum voltage of the
supply, where Rvdd is connected
This ensures enough supply current (IVREG MAX ) for the AS3691 under minimum supply voltage VDD MIN .
If a stable 5V supply within the operating conditions limits of VREG EXT is already existing in the system it is
possible to supply the AS3691 directly. In this case remove the resistor Rvdd and connected this supply directly
to VREG.
8.2 Overtemperature Protection
If the junction temperature inside the AS3691 rises above T OVTEMP , the current sources are switched off.
www.austriamicrosystems.com (ptr)
Revision 2.3
12 - 22
相关PDF资料 |
PDF描述 |
|---|---|
| AS5030 DB | BOARD DEMO AS5030 |
| AS5048-DB-1.0 | BOARD DEMO AS5048 |
| AS5215 DB | BOARD DEMO AS5215 |
| AS5245 DB | BOARD DEMO AS5245 |
| AS5304-DK-1.0 | BOARD DEMO AS5304 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS3691A-ZQFP | 功能描述:IC LED DVR 400MA RGB/WH 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| AS3691AZQFT | 制造商:ams 功能描述:QFN24 (4x4x0.5) |
| AS3691A-ZQFT | 功能描述:IC LED DRIVER 4X400MA 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM，降压（降压） 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED（HBLED） 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M |
| AS3691A-ZSDF | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:4 Precision 400mA Current Sources for RGB and Single Color Leds |
| AS3691A-ZTSP | 功能描述:IC LED DVR 400MA RGB/WH 20ETSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
发布紧急采购，3分钟左右您将得到回复。