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A8293SESTR-T PDF预览

A8293SESTR-T

更新时间: 2024-01-23 11:45:31
品牌 Logo 应用领域
急速微 - ALLEGRO 稳压器开关式稳压器或控制器电源电路开关式控制器
页数 文件大小 规格书
19页 404K
描述
Single LNB Supply and Control Voltage Regulator

A8293SESTR-T 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:QFN
包装说明:HVQCCN, LCC28,.2SQ,20针数:28
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.81
模拟集成电路 - 其他类型:SWITCHING REGULATOR控制模式:CURRENT-MODE
最大输入电压:16 V最小输入电压:9 V
标称输入电压:10 VJESD-30 代码:S-XQCC-N28
JESD-609代码:e3长度:5 mm
湿度敏感等级:2功能数量:1
端子数量:28最高工作温度:85 °C
最低工作温度:-20 °C封装主体材料:UNSPECIFIED
封装代码:HVQCCN封装等效代码:LCC28,.2SQ,20
封装形状:SQUARE封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度):260电源:9/16 V
认证状态:Not Qualified座面最大高度:1 mm
子类别:Power Management Circuits最大供电电流 (Isup):19 mA
表面贴装:YES切换器配置:BOOST
最大切换频率:384 kHz技术:BCDMOS
温度等级:OTHER端子面层:Matte Tin (Sn)
端子形式:NO LEAD端子节距:0.5 mm
端子位置:QUAD处于峰值回流温度下的最长时间:30
宽度:5 mmBase Number Matches:1

A8293SESTR-T 数据手册

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A8293  
Single LNB Supply and Control Voltage Regulator  
Features and Benefits  
Description  
2-wire serial I2C™ -compatible interface: control (write) and  
status (read)  
Intended for analog and digital satellite receivers, this single  
low noise block converter regulator (LNBR) is a monolithic  
linearandswitchingvoltageregulator, specificallydesignedto  
provide the power and the interface signals to an LNB down  
converter via coaxial cable. The A8293 requires few external  
components, with the boost switch and compensation circuitry  
integrated inside of the device. A high switching frequency is  
chosentominimizethesizeofthepassivefilteringcomponents,  
furtherassistingincostreduction.Thehighlevelsofcomponent  
integration ensure extremely low noise and ripple figures.  
LNB voltages (8 programmable levels) compatible with  
all common standards including domestic Japan models  
Tracking switch-mode power converter for lowest dissipation  
Integrated converter switches and current sensing  
Provides up to 700 mA load current  
Static current limit circuit allows full current at startup and  
1318V output transition; reliably starts wide load range  
Push-pull output stage minimizes 1318V and 1813V  
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 I2C™ data  
bits and/or external pin  
The A8293 has been designed for high efficiency, utilizing  
the Allegroadvanced BCD process. The integrated boost  
switch has been optimized to minimize both switching and  
static losses. To further enhance efficiency, the voltage drop  
across the tracking regulator has been minimized.  
Auxiliary modulation input  
LNB overcurrent with timer  
Diagnostics for output voltage level, input supply UVLO  
ForDiSEqCcommunications,severalschemesareavailable  
for generating tone signals, all the way down to no-load, and  
using either the internal clock or an external time source.  
Packages:  
20-contact, 4 × 4 mm  
MLP/QFN (suffix ES)  
28 contact, 5 × 5 mm  
MLP/QFN (suffix ET)  
Continued on the next page…  
Functional Block Diagram  
L1  
33 μH  
D1  
V
S
C4  
100 nF  
C2  
100 μF  
C6  
C5  
100 μF  
1 μF  
C1  
100 nF  
VIN  
LX GNDLX  
BOOST VCP  
VREG  
D3  
A
Charge  
Pump  
C3  
220nF  
Boost  
Converter  
Regulator  
TMode  
EXTM  
f
sw  
V
DD  
LNB  
Voltage  
Control  
V
OUT  
Wave  
Shape  
Linear  
Stage  
R1 R2 R3 R4  
DAC  
LNB  
D4  
A
TCAP  
C8  
100 nF  
C10  
220 nF  
C9  
10 nF  
D2  
TGate  
EXTM  
f
sw  
Fault Monitor  
SDA  
SCL  
ADD  
2
I
C™-  
Clock  
OCP  
PNG  
TSD  
VUV  
Compatible  
Interface  
Divider  
22 kHz  
TCAP  
Oscillator  
C7  
10 nF (or 22 nF)  
A
D3 and D4 are used for surge protection.  
IRQ  
PAD  
GND  
For recommended external components, refer to table 7  
8293-DS, Rev. 4  

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