參數(shù)資料
型號(hào)： PEF2023
廠商： SIEMENS AG
英文描述： ISDN DC Converter Circuit IDCC
中文描述： 綜合業(yè)務(wù)數(shù)字網(wǎng)DC轉(zhuǎn)換器電路IDCC
文件頁(yè)數(shù)： 16/25頁(yè)
文件大小： 145K
代理商： PEF2023
PEB 2023
PEF 2023
Functional Description
Semiconductor Group
16
08.97
2
Functional Description
The PEB/F 2023 contains the following functional blocks:
Supply and Biasing
Undervoltage Detection
Temperature Compensated Voltage Reference
Sawtooth Oscillator
Error Amplifier
Pulse Width Modulator
Digital Current Limiting
Soft Start
Control Logic (double pulse inhibit)
Output Driver
The reference voltage provides 4V for the regulation loop. A high gain error amplifier
compares the reference voltage to the output voltage. The output of the error amplifier is
then compared to a periodic ramp, which is generated by the sawtooth-oscillator circuit.
The comparator output is a fixed-frequency, variable pulse width logic signal, which
passes through logic circuits and the output driver and out to the external high voltage
power-switching-FET.
A digital current limiting device suppresses the PWM logic signal when the voltage
difference between current limit sense input I
P
and GND reaches 100 mV to protect the
external power-switching-FET.
Non-isolated and isolated SMPS-configurations are possible. Logic and analog circuits
are implemented in BICMOS in order to achieve low power dissipation.
Start-Up Procedure
Before the switched-mode DC/DC converter starts, a sequence of several conditions has
to be passed in order to avoid any system malfunction.
An integrated 6V linear voltage regulator supplies the internal low-voltage BICMOS-
circuits from the input voltage V
S
. The generated supply voltage is connected to pin V
EXT
and has to be buffered by an external capacitor (C
min
= 1
μ
F). Power dissipation of the
linear voltage regulator can be reduced, if an external supply is used for that purpose by
connecting it to pin V
EXT
. If the input voltage at V
EXT
is greater than 6.2V, the internal
linear voltage regulator turns off and the internal BICMOS-circuits are then fed from the
external voltage source (power housekeeping input V
EXT
). In this case, the input current
at V
EXT
is approximately 0.6mA.
相關(guān)PDF資料
PDF描述
PEB2023 ISDN DC Converter Circuit IDCC
PEF20321 Multichannel Network Interface Controller for HDLC
PEB20321 Multichannel Network Interface Controller for HDLC
PEB20321 Multichannel Network Interface Controller for HDLC MUNICH32X
PEF20324 ICs for Communications
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PEF20256EV3.2-G 功能描述:網(wǎng)絡(luò)控制器與處理器 IC T/E RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
PEF2026 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Analog IC
PEF2026T-PV1.1 功能描述:網(wǎng)絡(luò)控制器與處理器 IC ISDN RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
PEF2026TPV11NK 制造商:Infineon Technologies AG 功能描述:IC NETWORK TERMINATOR PDSO-20
PEF2026T-SV1.1 功能描述:網(wǎng)絡(luò)控制器與處理器 IC ISDN High Voltage Power Controller RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*