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| 型号： | A8291SETTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 12/19页 |
| 文件大小： | 0K |
| 描述： | IC VOLTAGE REG SGL LNB 28-QFN |
| 标准包装： | 9,000 |
| 应用： | 转换器，模拟和数字式卫星信号接收器 |
| 输入电压： | 8 V ~ 16 V |
| 输出数： | 1 |
| 输出电压： | 12.7 V ~ 20.4 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-VFQFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN/MLP 裸露焊盘（5x5） |
| 包装： | 带卷 (TR) |
A8291
Single LNB Supply and Control Voltage Regulator
Table 3. Control Register Address (I1, I0) = 10
Bit
0
1
2
3
4
5
6
7
Name
TMODE
TGATE
CADT
-
-
BFC2
I0
I1
Function
0: External Tone
1: Internal Tone
0: Tone Gated Off
1: Tone Gated On
0: Cable Disconnect Test Off
1: Cable Disconnect Test On
Not Used
Not Used
0: Bypass MOSFET Off
1: Bypass MOSFET On
Address Bit: 0
Address Bit: 1
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
TMODE Tone Mode. Selects between the use of an external 22 kHz logic signal or the use of
the internal 22 kHz oscillator to control the tone generation on the LNB output. A 0
selects the external tone and a 1 selects the internal tone. See the Tone Generation
section for more information
TGATE Tone Gate. Allows either the internal or external 22 kHz tone signals to be gated,
unless the EXTM is selected for gating. When set to 0, the selected tone (via
TMODE) is off. When set to 1, the selected tone is on. See Tone Generation Section
for more information.
CADT Cable Disconnect Test. To perform this test, set bits CADT, ENB, and VSEL0
through VSEL3 through the I 2 C?-compatible interface. During this test, the LNB
linear regulator is disabled, a 1 mA current source between the BOOST output and
the LNB output is enabled, and the BOOST voltage is increased to 22.8 V. After
these conditions are set, if the LNB voltage is above 21 V, it is assumed that the
coaxial cable connection between the LNBR output and the LNB head has been dis-
connected. In this case, the CAD bit is set in the status register. If there is a load on
the LNB pin, then the LNB voltage will decrease proportionally to the load current.
If the LNB volts drop below 19.95 V, it is assumed that the coax cable is connected
and the CAD bit in the status register is set to 0.
– Not Used.
– Not Used.
BFC2 Bypass MOSFET Control. When set to 1, the internal bypass MOSFETs are en-
abled. A 0 disables the bypass MOSFETs.
I0 Address.
I1 Address.
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
12
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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相关代理商/技术参数 |
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|---|---|
| A8291SETTR-TB | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Single LNB Supply and Control Voltage Regulator |
| A8292 | 制造商:AMPEX 功能描述: |
| A8292SETTR-T | 功能描述:IC REG LNB SUPPLY/CONTROL 28-MLP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:2,000 系列:- 应用:控制器，DSP 输入电压:4.5 V ~ 25 V 输出数:2 输出电压:最低可调至 1.2V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:30-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:30-TSSOP 包装:带卷 (TR) |
| A8293 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Single LNB Supply and Control Voltage Regulator |
| A8293SESTR-T | 功能描述:IC REG LNB BOOST/LINEAR 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
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