參數(shù)資料
型號: TLV431AIDBV
廠商: Texas Instruments, Inc.
英文描述: LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS
中文描述: 低電壓調(diào)節(jié)精密并聯(lián)穩(wěn)壓器
文件頁數(shù): 18/34頁
文件大?。?/td> 646K
代理商: TLV431AIDBV
SLVS139R JULY 1996 REVISED SEPTEMBER 2005
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
~
~
P
+
P
P
VCC
VFB
Current
Sense
GND
Gate Drive
Controller
P
P
P
P
TLV431
or
TLV431A
or
TLV431B
VO
3.3 V
VI
120 V
Figure 18. Flyback With Isolation Using TLV431, TLV431A, or TLV431B
as Voltage Reference and Error Amplifier
Figure 18 shows the TLV431, TLV431A, or TLV431B used in a 3.3-V isolated flyback supply. Output voltage V
O
can be as low as reference voltage V
REF
(1.24 V
±
1%). The output of the regulator, plus the forward voltage
drop of the optocoupler LED (1.24 + 1.4 = 2.64 V), determine the minimum voltage that can be regulated in an
isolated supply configuration. Regulated voltage as low as 2.7 Vdc is possible in the topology shown in
Figure 18.
相關(guān)PDF資料
PDF描述
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