6ES7291-8GH23-0XA0 可亿可求
发展现状
数字电源系统的发展现状
随着现代科技事业的发展及开关电源市场的需求，在21世纪初国际上开始研制数字电源系统。2005年3月，美国德州仪器公司(TI)宣布推出具有创新型的数字电源产品，不仅能显著电源系统的性能，还可大幅度延长其使用寿命。该公司还展示了Fusjon Digital Powe解决方案，以证明数字电源系统能以极具竞争力的低成本，实现高性能指标及设计灵活性。
该解决方案包括以下3类芯片：
1)UCD7K系列数字电源驱动器(含UCD7100和UCD7201);
2)UCD8K系列PWM控制器(含UCD8620和UCD8220);
3)UCD9K系列数字信号处理器(UCD9110/9501)。
上述芯片已形成系列化产品，于2005年秋季正式销售。该产品支持包括从AC线路到负载的电源系统，可广泛用于电信设施、计算机服务器、数据中心电源系统及不间断电源(UPS)等。
基本构成
2.l 数字电源驱动器
UCD7100/7201均属于数字控制电源驱动器芯片，二者的区别是UCD7100为单端输出，UCD7201为双端输出，额定输出电流均为±4A，可驱动MosFET开关功率管，均可适配UCD9110/9501型数字控制器。主控制器可监控其输出电流，快速检测过流故障并迅速关断电源，检测周期仅为25ns。
现以UCD7100为例，其内部框图如图1所示。
主要包括3.3 v电压调整器及基准电压源、触发器、施密特比较器、欠压关断电路、控制门、TrueDrive驱动器。“TrueDrive”(真驱动)为TI公司的专有技术，它是由并联双极性晶体管和MOSFET管组成上拉/下拉电路构成的混合输出级。其优点是驱动能力强，在低电压时也能正常输出，并能在极低输出阻抗下控制外部功率MOSFET的过压、欠压保护，功率MOSFET不需要接起保护作用的肖特基钳位二极管。UCD7100能在几百ns的时间内给MOSTFET的栅极提供一个高峰值电流，快速开启驱动器。UCD7100的高阻抗数字输入端(IN)能接收3.3v逻辑电平、高开关频率达2MHz的信号。利用施密特比较器能将内部电路与外部噪音隔离。若控制器的PWM输出停在高电平上并发生过电流故障，电流检测电路就关断驱动器的输出，系统可进入重试模式。通过DSP或MCU内部的看门狗电路，能重新启动芯片。UCD7100内部的3.3 v/lOmA电压调整器可作为数字控制器的电源。
2.2 PWM控制器
UCD8220/8620是受DSP，或MCU数字控制的双端推挽式PWM控制器。二者区别是UCD8220可利用48V低压启动，UCD8620内部增加了110V高压启动电路。UCD8220的内部框图如图2所示。
KENT-MOORE / Yokogawa HALOGEN REFRIGERANT LEAK DETECTOR, R-12 R-134A, J-39400
Kokusai KC10 Thermo-Hygrograph Chart Recorder (Yokogawa)
LCD Damage Spare Part only Yokogawa CW120 Clamp On Power Meter W/O Clamp
Level / pressure Transmitter Transducer Yokogawa EJA220A
LITTON / YOKOGAWA DD SERVO ACTUATOR SR1015B82
LITTON YOKOGAWA DYNASERV DD SERVO ACTUATOR DRIVE SR1015B02 -2MN
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LITTON YOKOGAWA DYNASERV DD SERVO ACTUATOR DRIVE SR1015B82 2SN/L1
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Lose Sensor Yokogawa OX51 Pocket O2 OXYGEN Alarm Tester Monitor W/O Sensor
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LOT 2 YOKOGAWA B9136NH 16W AC85-132V-AC 12V-DC 0.9A AMP POWER SUPPY B283178
LOT OF (2) YOKOGAWA INDUSTRIAL PH/ORP CABLE
Lot of (80) Yokogawa 0-150 Volt Panel Meter 250344PZPZ/UL Brand
Lot of 10 nos. YOKOGAWA SC42-SP34 Conductivity Cell Sensor R0-051 W/ Wir
LOT OF 10 YOKOGAWA B956BLF CHART PAPER
LOT OF 10 YOKOGAWA B957AMB FOLDING CHART * IN A BOX*
Lot of 10 Yokogawa B9619AH Folding Chart
LOT OF 13 YOKOGAWA PEN CARTRIDGE (PURPLE) B9902AR *FACTORY SEALED*
LOT OF 15 IN PKG YOKOGAWA TS-54-020 RED RECORDER PEN (157)
Lot of 19 Yokogawa F3 modules PLC, I/O, link, PS, base
Lot of 2 each Yokogawa Yewflo Vortex Flow Converter YFA11
LOT OF 2 YOKOGAWA 250-340-LSXS * IN BOX*
Lot of 2 Yokogawa Insulation Resistance Tester, Type 3213
LOT OF 2 YOKOGAWA PANEL METER 2085A30 ALS-N-L-BG * IN BOX*
LOT OF 2 YOKOGAWA PANEL METER 251300NDND DC AMMETER 0-15DC AMPERES IN BOX
LOT OF 2 YOKOGAWA/GE GENERAL ELECTRIC 0-2400 F.P.M. PANEL METER CAT#YE/250-4
Lot Of 2, YOKOGAWA 251340LSNL, MODEL PANEL METER 0-10 A-C Amperes #1646A
Lot of 3 Bakelite Portable meters Weston 903, Yokogawa 2013, Sensitive Research
LOT OF 3 IN PKG YOKOGAWA RED RECORDER B9565AP (181-1)
LOT OF 3 YOKOGAWA SENSORS (1) SC21-AAP26 P3 COMBINED PH (2) SM21-AG6 SN-4
LOT OF 3 YOKOGAWA B956AAZ CHART PAPER
LOT OF 3 YOKOGAWA PEN CARTRIDGE (BLUE) B9902AP *FACTORY SEALED*
LOT OF 3 YOKOGAWA PEN CARTRIDGE (GREEN) B9902AN *FACTORY SEALED*
LOT OF 3 YOKOGAWA PEN CARTRIDGE (GREEN) B9902AN * OUT OF BOX*
LOT OF 3 YOKOGAWA PEN CARTRIDGE (PURPLE) B9902AR *FACTORY SEALED*
LOT OF 3 YOKOGAWA PEN CARTRIDGE (PURPLE) B9902AR * OUT OF BOX*
LOT OF 3 YOKOGAWA PEN CARTRIDGE (RED) B9902AM * OUT OF BOX*
LOT OF 3 Yokogawa UM330 Temperature Controller
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LOT OF 5 NIB YOKOGAWA B9565AW FOLDING CHARTS
LOT OF 5 YOKOGAWA FOLDING CHART B953AAC
LOT OF 6 - Yokogawa 251440LSRL 0-200 AC Panel Meter * IN BOX*
LOT OF 6 YOKOGAWA B956BLF CHART PAPER
LOT OF 7 YOKOGAWA B957AMB FOLDING CHART * IN A BOX*
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LR8100E YOKOGAWA
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METER, YOKOGAWA PANEL 0-15 AMPERES NIB 251340LSXX
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MZ-188, YOKOGAWA DR130 HYBRID RECORDER
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~ YOKOGAWA ~ NON-RESET TIME METER ~ PART 240313AAAB7 120V ~ 3W ~ 60HZ
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1pc Yokogawa ADM11
1pc YOKOGAWA AMM22J
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Brand No.19M1228 Yokogawa 260-244-Pzpz Voltage Meter
Brand No.19M1266 Yokogawa 260-240-Lsng Current Meter
Brand No.63K2380 Yokogawa 250 120 Lala Voltage Meter
Brand No.65K3123 Yokogawa 250 200 Mtmt Current Meter
Brand No.65K3127 Yokogawa 250 240 Lsls Current Meter
Brand No.65K3129 Yokogawa 250 240 Lspb Current Meter
Brand No.65K3130 Yokogawa 250 240 Lspk Current Meter
Brand No.65K3141 Yokogawa 250 244 Rxrx Voltage Meter
Brand No.65K3149 Yokogawa 250 340 Lsnt Current Meter
Brand No.65K3151 Yokogawa 250 340 Lspk Current Meter
Brand No.65K3157 Yokogawa 250-340-Lssc Current Meter
Brand No.65K3161 Yokogawa 250 344 Rxrx Voltage Meter
Brand No.65K3162 Yokogawa 250 344 Sfsf Voltage Meter
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Brand No.65K3194 Yokogawa 251 220 Pkpk Voltage Meter
Brand No.65K3195 Yokogawa 251 240 Lsls Current Meter
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Brand No.65K4619 Yokogawa 260 120 Mtmt Voltage Meter
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DP HARP YOKOGAWA DIGITAL TRANSMITTER EJA110A SUFFIX DLS4B-92EB/FS1/D1
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EIL YOKOGAWA YE/250-2 METER 499108 175482 108627
EIL YOKOGAWA YE/250-2 METER 499108 175482 108627 NOS
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IN BOX YOKOGAWA 250340MTMT A-C AMPERS PANEL METER 0-10 AMP AMPERMETER
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IN BOX YOKOGAWA 250440NDND7 A-C AMPERS PANEL METER 0-15 AMP AMPERMETER
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in box YOKOGAWA NP53*C Basic MFCU Processor Card Free Shipping Worldwide
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In The Box Ge Yokogawa Ye/185 Vertical Panel Meter
IN THE BOX YOKOGAWA 0-20 AMPS DC 250-400-NGNG-20 250400NGNG20
Johnson Yokogawa YF101 Vortex Flowmeter Converter YF01 NNNB1A
LCD Display Panel Yokogawa K9676MA EW32F92FLW
listing 1PC 4 F3YP14-0N YOKOGAWA Yokogawa PLC xhg29
listing 1PC 4 Yokogawa F3WD64-3P xhg29
listing 1PC 4 Yokogawa PLC F3PU10-0S xhg29
listing 1PC 4 Yokogawa PLC F3RP41-3P xhg29
listing 1PC 4 Yokogawa PLC F3RZ81-0N xhg29
listing 1PC 4 Yokogawa PLC F3SP66-4S xhg29
listing 1PC 4 Yokogawa PLC F3WD64-3F xhg29
listing 1PC 4 YOKOGAWA Yokogawa F3LC11-1F xhg29
listing 1PC 4 YOKOGAWA Yokogawa PLC F3RZ82-0F xhg29
listing 1PC 4 YOKOGAWA Yokogawa PLC F3SP28-3S xhg29
listing 1PC 4 YOKOGAWA Yokogawa PLC F3SP66-4S xhg29
listing 1PC 4 YOKOGAWA Yokogawa PLC F3XD16-3F xhg29
listing 1PC 4 YOKOGAWA Yokogawa PLC F3XD64-3F xhg29
listing 1PC 4 YOKOGAWA Yokogawa PLC F3YD08-6A xhg29
listing 1PC F3YP14-0N YOKOGAWA Yokogawa PLC F3 xhg28
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listing 1PC Yokogawa /YOKOGAWA VJt6-017-15NU xhg26
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listing 1pcs YOKOGAWA DI00124-16A
listing 2 packs of YOKOGAWA B9627AY RECORDING CHARTS ****Factory Sealed****
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listing YOKOGAWA F3AD08-1R , A/D Converter PLC unit sn:4028, as photos.
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listing YOKOGAWA F3LC12-1F, Computer C link PLC unit sn:5077, Promotion.
listing YOKOGAWA F3LC12-1F, Computer C link PLC unit sn:5078, as p