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參數(shù)資料
| 型號(hào)： | TA76432S |
| 廠商： | Toshiba Corporation |
| 英文描述： | 1.26-V Adjustable High-Precision Shunt Regulators |
| 中文描述： | 1.26 - V可調(diào)節(jié)的高精密并聯(lián)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大小： | 248K |
| 代理商： | TA76432S |
TA76432FT/FC/F/FR/S
2002-07-12
4
Recommended Operating Conditions
Characteristics
Symbol
Min
Typ.
Max
Unit
Cathode voltage
V
KA
V
REF
19
V
Cathode current
I
K
0.5
15
mA
Operating temperature
T
opr
40
85
°C
Electrical Characteristics
(Unless otherwise specified, Ta 25°C, I
K
5 mA)
Characteristics
Symbol
Test Condition
Min
Typ.
Max
Unit
Reference voltage
V
REF
V
KA
V
REF
1.242
1.26
1.278
V
Deviation of reference input voltage
over temperature
V
REF (dev)
0°C
Ta
85°C, V
KA
V
REF
3
15
mV
V
REF
V
KA
5 V
0.5
2.5
Ratio of change in reference input
voltage to the change in cathode
voltage
V
REF
/ V
5 V
V
KA
19 V
0.3
2.0
mV/V
Reference Input current
I
REF
V
KA
V
REF
2
4
A
Deviation of reference input current
over temperature
I
REF (dev)
0°C
R
1
10 k , R
2
Ta
85°C, V
KA
V
REF
,
0.3
1.2
A
Minimum cathode current for
regulation
I
Kmin
V
KA
V
REF
0.2
0.5
mA
Off-State cathode current
I
Koff
V
KA
19 V, V
REF
0 V
1.0
A
Dynamic impedance
Z
KA
V
KA
V
REF
, f
0.5 mA
1 kHz,
15 mA
I
K
0.2
0.5
The deviation parameters V
REF (dev)
and I
REF (dev)
are defined as the maximum variation of the V
REF
and I
REF
over the
rated temperature range.
The average temperature coefficient of the V
REF
is defined as:
Application Circuit Example
Error amplification circuit for switching power supply
This circuit amplifies the difference between the switching power supply’s secondary output voltage and the shunt
regulator’s reference voltage. It then feeds the amplified voltage back to the primary input voltage via the
photocoupler.
C
ppm
Ta
C
@25
V
10
V
V
REF
6
(dev)
REF
REF
min
max
V
REF (dev)
Ta
V
REF
Photo-
coupler
V
OUT
GND
Shunt regulator
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