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參數(shù)資料
| 型號： | TL783Y |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | HIGH-VOLTAGE ADJUSTABLE REGULATOR |
| 中文描述： | 高電壓調(diào)節(jié)調(diào)節(jié)器 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大小： | 205K |
| 代理商： | TL783Y |
TL783
HIGH-VOLTAGE ADJUSTABLE REGULATOR
SLVS036E – SEPTEMBER 1981 – REVISED FEBRUARY 2000
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 13
°
C
0
1
2
3
4
Time –
μ
s
–
V
O
C
0.4
0.2
0
–0.2
1
0.5
0
LINE TRANSIENT RESPONSE
Figure 14
VI = 35 V
VO = 10 V
Co = 1
μ
F
TJ = 25
°
C
–
IO
6
4
2
0
–2
–4
–6
0.8
0.6
0.4
0.2
0
0
40
80
120
160
200
240
Time –
μ
s
LOAD TRANSIENT RESPONSE
–
V
O
DESIGN CONSIDERATIONS
The internal reference (see functional block diagram) generates 1.25 V nominal (V
ref
) between OUT and ADJ. This
voltage is developed across R1 and causes a constant current to flow through R1 and the programming resistor R2,
giving an output voltage of:
V
O =
V
ref
(1 + R2/R1) + l
I(ADJ)
(R2)
or
V
O
≈
V
ref
(1 + R2/R1)
The TL783 was designed to minimize the input current at ADJ and maintain consistency over line and load variations,
thereby minimizing the associated (R2) error term.
To maintain I
I(ADJ)
at a low level, all quiescent operating current is returned to the output terminal. This quiescent
current must be sunk by the external load and is the minimum load current necessary to prevent the output from rising.
The recommended R1 value of 82
provides a minimum load current of 15 mA. Larger values can be used when
the input-to-output differential voltage is less than 125 V (see the output-current curve in Figure 14) or when the load
sinks some portion of the minimum current.
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