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參數(shù)資料
| 型號： | UC39431BD |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR |
| 中文描述： | 電壓調(diào)節(jié)器|調(diào)節(jié)| 10.42V |雙極|專科| 8引腳|塑料 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 137K |
| 代理商： | UC39431BD |
4
UC19431
UC29431
UC39431
UC39431B
Magnetic Amplifier Controller Application
The 0.4% initial reference makes the UC39431 ideal as a
programmable shunt regulator. By adding two external
resistors, the on-chip 1.3V reference can be gained to
any voltage between 2.2V (2.4V for the UC39431) and
36.0V. The input bias current is typically maintained at
0.2μA
for
the
output
voltage
non-inverting error amplifier input is not available, a 5.1k
non-inverting input impedance is added to the input of
the error amplifier. This allows the user to choose the
SENSE pin input impedance to cancel the minimal offset
voltage caused by the input bias current.
range.
Since
the
Frequency Compensation
The UC39431 shunt regulator is designed with two
independant gain stages. The error amplifier provides
90dB of gain with a typical gain bandwidth product of
5MHz. The error amplifier provides sufficient gain in or-
der for the sense voltage to be accurately compared to
the 1.3V on-chip reference. Complete control of the fre-
quency response of the error amplifier is accomplished
with the COMP pin. By putting negative feedback across
the error amplifier, either a pole or a pole-zero can be
added.
The second gain stage is the transconductance (gm) am-
plifier. The gm amplifier is designed with a known linear
140mS of transconductance. The voltage gain is conse-
quently gm Ro, where Ro is the output impedance at
the collector pin. The frequency response of the
transconductance amplifier is controlled with the COLL
pin. The gain bandwidth product of the gm amplifier is
typically 3MHz. A pole or pole-zero can be added to this
stage by connecting a capacitor or a series capacitor and
resistor between COLL and GND.
The compensation of a control loop containing the
UC39431 is made easier due to the independant com-
pensation capability of the error amplifier and gm ampli-
fier. As shown in the applications information, a pole-zero
is created with a series resistor and capacitor between
SENSE and COMP. The pole created is dominant, while
the zero is used to increase the bandwidth and cancel
the effects of the pole created by the capacitor between
the COLL and GND pins.
APPLICATION INFORMATION
6
5
7
4
20k
4k
REF
2.85k
2
22.4k
16k
5.1
8
1
3
1.3V
0.5V
GND
COLL
I
COLL
40.2K
6.8nF
21K
V
SENSE
R1
R2
R3
SENSE
2K
COMP
VCC
Figure 2. 15.0V optocoupler application.
UDG-99051
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PDF描述 |
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| UC39431BN | VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR |
| UC5170 | Octal Line Driver |
| UC5180 | Octal Line Receiver |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC39431BN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:VOLT REGULATOR|ADJUSTABLE|+10.42V|BIPOLAR|DIP|8PIN|PLASTIC |
| UC39431D | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Precision Adjustable Shunt Regulator RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| UC39431DG4 | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Precision Adjustable Shunt Regulator RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| UC39431DTR | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Precision Adjustable Shunt Regulator RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| UC39431DTRG4 | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 Precision Adjustable Shunt Regulator RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
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