參數(shù)資料
型號(hào)： TL4051CQDCKR
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.212 V, PDSO5
封裝： GREEN, PLASTIC, SC-70, 5 PIN
文件頁(yè)數(shù)： 5/25頁(yè)
文件大?。?/td> 613K
代理商： TL4051CQDCKR
www.ti.com
Adjustable Version
R
S
TL4051x (Adj)
VS
R1
R2
V = V
(1 + R2/R1)
Z
REF
+
V
REF
-
Cathode and Load Currents
R
S
+
V
S
* VZ
(I
L
) IZ)
(1)
TL4051x12
I + I
Z
L
I
L
I
Z
V
S
V
Z
R
S
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLOS487 – JUNE 2007
APPLICATION INFORMATION (continued)
The adjustable version allows VZ to be set by a user-defined resistor divider. The output voltage, VZ, is set
according to the equation shown in Figure 3.
Figure 3. Adjustable Shunt Regulator
In a typical shunt regulator configuration (see Figure 4), an external resistor, RS, is connected between the
supply and the cathode of the TL4051. RS must be set properly, as it sets the total current available to supply
the load (IL) and bias the TL4051 (IZ). In all cases, IZ must stay within a specified range for proper operation of
the reference. Taking into consideration one extreme in the variation of the load and supply voltage (maximum IL
and minimum VS), RS must be small enough to supply the minimum IZ required for operation of the regulator, as
given by data sheet parameters. At the other extreme, maximum VS and minimum IL, RS must be large enough
to limit IZ to less than its maximum recommended rating of 12 mA.
RS is calculated as shown in Equation 1.
Figure 4. Shunt Regulator
13
相關(guān)PDF資料
PDF描述
TL4051A12QDBZR 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.225 V, PDSO3
TL4051C12QDCKR 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.225 V, PDSO5
TL4051AIDCKT 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.212 V, PDSO5
TL4051CQDCKT 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.212 V, PDSO5
TL4051A12QDBZT 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.225 V, PDSO3
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