参数资料
型号: BQ51013ARHLR
厂商: Texas Instruments
文件页数: 29/45页
文件大小: 0K
描述: IC WIRELESS PWR RCVR 20QFN
标准包装: 1
应用: 无线电源接收器
电流 - 电源: 1.5A
电源电压: 4 V ~ 10 V
工作温度: 0°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 20-VFQFN 裸露焊盘
供应商设备封装: 20-QFN-EP(4.50x3.50)
包装: 标准包装
其它名称: 296-30568-6
bq51014 is Not Recommended For New Designs
VTSB (2.2V)
SLUSAY6B – MARCH 2012 – REVISED OCTOBER 2013
20k
R 2
TS-CTRL
R 1
R 3
NTC
Figure 41. NTC Circuit Used for Safe Operation of the Wireless Receiver Power Supply
The resistors R 1 and R 3 can be solved by resolving the system of equations at the desired temperature
( )
+ R 1 ? ÷
? R R
( )
+ R
+ R
? R 3 NTC 1 ÷
è ?
% V COLD = ′ 100
( )
+ R 1 ? ÷
? R R
? ÷ + R2
3 ( NTC THOT + R 1 ) ?
? R R
? R 3 + ( R NTC 1 )
+ R
è ?
% V HOT = ′ 100
3 ( NTC THOT + R 1 ) ?
? R R
? ÷ + R2
thresholds. The two equations are:
? 3 NTC TCOLD
? ÷
TCOLD
? 3 NTC TCOLD
÷è                                                  ?
? R 3 + ( R NTC TCOLD + R 1 )
?
? ÷
THOT
?
÷è                                               ?
? R 3 + ( R NTC THOT + R 1 )
Where:
(4)
R NTC
TCOLD
b ? ? ? 1 TCOLD - 1 To ? ÷ ÷
= R o e è ?
b ? 1 - 1 To ?
= R o e è T HOT
R NTC
THOT
?
(5)
where, T COLD and T HOT are the desired temperature thresholds in degrees Kelvin. R O is the nominal resistance
and β is the temperature coefficient of the NTC resistor. R O is fixed at 20 k Ω . An example solution is provided:
?
?
R1 = 4.23k Ω
R3 = 66.8k Ω
where the chosen parameters are:
?
?
%V HOT = 19.6%
%V COLD = 58.7%
Copyright ? 2012–2013, Texas Instruments Incorporated
Product Folder Links: bq51013A bq51014
29
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