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参数资料
| 型号： | TA76432F(TE12L) |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.26 V, PSSO3 |
| 封装： | 1.50 MM PITCH, PLASTIC, HSOP-3 |
| 文件页数： | 7/12页 |
| 文件大小： | 251K |
| 代理商： | TA76432F(TE12L) |
TA76432FT/FC/F/FR/S
2004-07-01
4
Recommended Operating Conditions
Characteristics
Symbol
Min
Typ.
Max
Unit
Cathode voltage
VKA
VREF
19
V
Cathode current
IK
0.5
15
mA
Operating temperature
Topr
40
85
°C
Electrical Characteristics
(Unless otherwise specified, Ta
= 25°C, IK = 5 mA)
Characteristics
Symbol
Test Condition
Min
Typ.
Max
Unit
Reference voltage
VREF
VKA = VREF
1.242
1.26
1.278
V
Deviation of reference input voltage
over temperature
VREF (dev)
0°C <
= Ta <= 85°C, VKA = VREF
3
15
mV
VREF <
= VKA <= 5 V
0.5
2.5
Ratio of change in reference input
voltage to the change in cathode
voltage
VREF/V
5 V <
= VKA <= 19 V
0.3
2.0
mV/V
Reference input current
IREF
VKA = VREF
2
4
A
Deviation of reference input current
over temperature
IREF (dev)
0°C <
= Ta <= 85°C, VKA = VREF,
R1 = 10 k, R2 = ∞
0.3
1.2
A
Minimum cathode current for
regulation
IKmin
VKA = VREF
0.2
0.5
mA
Off-State cathode current
IKoff
VKA = 19 V, VREF = 0 V
1.0
A
Dynamic impedance
ZKA
VKA = VREF, f <= 1 kHz,
0.5 mA <
= IK <= 15 mA
0.2
0.5
The deviation parameters VREF (dev) and IREF (dev) are defined as the maximum variation of the VREF and IREF over the
rated temperature range.
The average temperature coefficient of the VREF is defined as:
Application Circuit Example
Error amplification circuit for the 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
REF
6
(dev)
REF
°
°
×
=
α
min
max
VREF (dev)
Ta
VREF
Photo-
coupler
VOUT
GND
Shunt regulator
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