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參數(shù)資料
| 型號： | TS317CZ |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| 中文描述： | 5.0放大器正電壓穩(wěn)壓器 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 438K |
| 代理商： | TS317CZ |
Application Information
Basic Circuit Operation
The TS317 is a 3-terminal floating regulator. In
operation, the TS317 develops and maintains a
nominal 1.25V reference (Vref) between its output and
adjustment terminals. This reference voltage is
converted to a programming current (Iprog.) by R
1
(see
Figure 17), and this constant current flows through R
2
to ground. The regulated output voltage is given by:
Vout = Vref ( 1 + R2 / R1 ) + Iadj * R2
Since the current from the adjustment terminal (Iadj)
represents an error term in the equation, the TS317
was designed to control Iadj to less than 100uA and
keep it constant. To do this, all quiescent operating
current is returned to the output terminal. This imposes
the requirement for a minimum load current. If the load
current is less than this minimum, the output voltage
will rise.
Since the TS317 is a floating regulator, it is only the
voltage differential across the circuit which is important
to performance, and operation at high voltages with
respect to ground is possible.
Figure 5. basic circuit configuration
Load Regulation
The TS317 is capable of providing extremely good load
regulation, but a few precautions are needed to obtain
maximum performance. For best performance, the
programming resistor (R1) should be connected as
close to the regulator as possible to minimize line
drops which effectively appear in series with the
reference, thereby degrading regulation. The ground
end of R2 can be returned near the load ground to
provide remote ground sensing and improve load
regulation.
External Capacitor
A 0.1
μ
F disc or 1
μ
F tantalum input bypass capacitor
(Cin) is recommended to reduce the sensitivity to input
line impedance.
The adjustment terminal may be bypassed to ground to
improve ripple rejection. This capacitor (Cadj) prevents
ripple from being amplified as the output voltage is
rejection about 15dB at 120 H
Z
in a 10V application.
Although the TS317 is stable with no output
capacitance, like any feedback circuit, certain values of
external capacitance can cause excessive ringing. An
output increased. A 10u
μ
F capacitor should improve
ripple capacitance (Co) in the form of a 1uF tantalum
or 25uF aluminum electrolytic capacitor on the output
swamps this effect and insures stability.
Protection Diode
When external capacitors are used with any I.C.
regulator it is sometimes necessary to add protection
diodes to prevent the capacitors from discharging
through low current points into the regulator.
Figure 18 shows the TS317 with the recommended
protection diodes for output voltages in excess of 25 V
or high capacitance values (Co > 25uF, Cadj > 10uF).
Diode D1 prevents Co from discharging thru the I.C.
during an input short circuit. Diode D2 protects against
capacitor C
ADJ
discharging through the I.C. during an
output short circuit. The combination of diodes D1
and
D2 prevents C
ADJ
from discharging through the I.C.
during an input short circuit.
Figure 6. voltage regulator with
protection diode
TS317
5-8
2003/12 rev. D
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS317CZ C0 | 制造商:SKMI/Taiwan 功能描述:Standard Regulator Pos 1.25V to 37V 1.5A 3-Pin(3+Tab) TO-220 Tube 制造商:SKMI/Taiwan 功能描述:LDO Regulator Pos 1.25V to 37V 1.5A 3-Pin(3+Tab) TO-220 Tube 制造商:Taiwan Semiconductor 功能描述:Standard Regulator Pos 1.25V to 37V 1.5A 3-Pin(3+Tab) TO-220 Tube 制造商:Taiwan Semiconductor 功能描述:LDO Regulator Pos 1.25V to 37V 1.5A 3-Pin(3+Tab) TO-220 Tube |
| TS317CZC0 | 制造商:Taiwan Semiconductor 功能描述:3-Term Adj Positive Volt Reg TS317CZ C0 |
| TS317L | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:3-Terminal Adjustable Output Positive Voltage Regulator |
| TS317L_07 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:3-Terminal Adjustable Positive Voltage Regulator |
| TS317L_08 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:3-Terminal Adjustable Positive Voltage Regulator |
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