參數(shù)資料
型號: TLVH432QPKG3
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): 21/37頁
文件大?。?/td> 570K
代理商: TLVH432QPKG3
www.ti.com
APPLICATION INFORMATION
P
+
P
P
V
CC
V
FB
Current
Sense
GND
Gate Drive
Controller
P
P
P
P
TLVH431
V
O
3.3 V
V
I
120 V
TLVH431, TLVH431A, TLVH431B
TLVH432, TLVH432A, TLVH432B
LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS555F–NOVEMBER 2004–REVISED OCTOBER 2005
Figure 18. Flyback With Isolation Using TLVH431 and TLVH432 as Voltage Reference and Error Amplifier
Figure 18
shows the TLVH431 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). 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
.
21
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