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参数资料
| 型号： | A8292SETTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LNB SUPPLY/CONTROL 28-MLP |
| 标准包装： | 1 |
| 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： | 2 |
| 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： | 标准包装 |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1187-6 |
A8292
Dual LNB Supply and Control Voltage Regulator
Features and Benefits
? 2-wire serial I 2 C? -compatible interface: control (write) and
status (read)
? LNB voltages (16 programmable levels) compatible with
all common standards
? Tracking switch-mode power converter for lowest dissipation
? Integrated converter switches and current sensing
? Provides up to 500 mA per channel and 750 mA total
? Static current limit circuit allows full current at startup and
13 → 18 V output transition; reliably starts wide load range
? Push-pull output stage minimizes 13 → 18 V and 18 → 13 V
output transition times for highly capacitive loads
? Adjustable rise/fall time via external timing capacitor
? Built-in tone oscillator, factory-trimmed to 22 kHz
facilitates DiSEqC? tone encoding, even at no-load
? Four methods of 22 kHz tone generation, via I 2 C? data
bits and/or external pin
? 22 kHz tone detector facilitates DiSEqC? 2.0 decoding
? Auxiliary modulation input
? LNB overcurrent with timer
? Diagnostics for output voltage level, input supply UVLO,
and DiSEqC? tone output
? Cable disconnect diagnostic
Package:
28 pin 5 mm × 5mm
MLP/QFN (suffix ET)
Description
Intended for analog and digital satellite receivers, this dual
low-noise block converter regulator (LNBR) is a monolithic
linear and switching voltage regulator, specifically designed to
provide the power and the interface signals to two LNB down
converters via coaxial cables. The A8292 requires few external
components, with the boost switches and compensation circuitry
integrated inside of the device. A high switching frequency is
chosen to minimize the size of the passive filtering components,
further assisting in cost reduction. The high level of component
integration ensures extremely low noise and ripple figures.
The A8292 has been designed for high efficiency, utilizing
the Allegro? advanced BCD process. The integrated boost
switches have been optimized to minimize both switching and
static losses. To further enhance efficiency, the voltage drop
across the tracking regulators has been minimized.
The A8292 has integrated tone detection capability, to support
full two-way DiSEqC? communications. Several schemes
are available for generating tone signals, all the way down
to no-load, and using either the internal clock or an external
time source.
Continued on the next page…
Functional Block Diagram
V S
A
C2
100 μ F
Channel 1
L1
33 μ H
D1
L3
1 H
V DD
R4
TDO1 EXTM1
R5
LX1
C5
100 μ F
GNDLX1
C6
1 μ F
BOOST1
VCP1
C4
100 nF
A8292
Charge
D3
C
VIN
C1
100 nF
Boost
Converter
Pump
C12
D
VREG
C3
220 nF
Regulator
Fsw
TMode1
EXTM1
VPump
R6
15
D
R1
R2
R3
SDA
SCL
IRQ
I 2 C –
Compatible
Interface
DAC
Fault Monitor
OCP1
OCP2
PNG1
PNG2
TSD
VUV
LNB
Voltage
Control
TCAP1
Fsw
Oscillator
Wave
Shape
TGate1
Clock
Divider 22 kHz
Linear
Stage
TDO1
Tone
LNB1
C8
D2 220 nF
TCAP1
C7
22 nF
TDI1
L2
220 μ H
C9
R8 220 nF
30
C11
0.68 μ F
B
C13
10 nF
V OUT1
D4
C
A
B
C
D
Channel 1 of 2 channels shown.
R8-C11 network is needed only when high
inductive load is applied, such as ProBrand LNB.
D3 and D4 are used for surge protection.
Either C12 or C9 should be used, but not both.
8292-DS, Rev. 15
PAD
GND
Detect
R7
100
C10
10 nF
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相关代理商/技术参数 |
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| 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 |
| A8293SETTR-T | 功能描述:IC REG LNB BOOST/LINEAR 28QFN 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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