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UC3863

LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS; ? UTC proprietary frequency hopping technology for Improved EMI performance.?\n? Power-saving mode for high light-load and standby efficiency \n? Dynamic peak current limiting for constant output power \n? Built-in synchronized slope compensation \n? OTP,OLP,OVP and VDD clamp for higher security \n? Programmable PWM Frequency \n? Gate output voltage clamped at 15V \n? Low start-up current \n? Cycle-by-cycle Current Limiting \n? Under voltage lockout (UVLO) \n? Few external components required;

The?UC3863 is a high performance current mode PWM controller ideally suited for low standby power. The PWM switching frequency is programmable externally at normal operation. Low VDD startup current make the power reliable on startup design and a large value resistor could be?used in the startup circuit to minimize the standby power. At no?load condition, the IC operates in power-saving mode for lower standby power, decreasing frequency for Higher conversion efficiency at light load condition. The?UC3863 contains protection with automatic recovery including OLP (over load protection), OTP (over temperature protection), OVP (over voltage protection), UVLO (VDD over voltage clamp and under voltage lockout).To protect the power MOSFET, Gate-drive output is fixed up to 15V max. The?UC3863 contains protection OCP (cycle-by-cycle current limiting). The internal slope compensation?improves system stability at high PWM duty cycle output. Leading-edge blanking on current sense input removes the signal glitch, which offering minimal external component count in the design. Excellent EMI performance is achieved with UTC proprietary frequency hopping technique (ZL201020615247.1) together with soft driver control. Audio noise is eliminated due to switch frequency more than 20kHz during operation. The UC3863 has such applications as: battery charger, power adaptor, set-top box power supplies, ink jet printers, open-frame SMPS

UTCUnisonic Technologies

友順友順科技股份有限公司

UC3863

具有 8/7V UVLO、交替輸出和固定關(guān)斷時(shí)間、溫度范圍為 0°C 至 70°C 的諧振模式 PWM; ? Controls Zero Current Switched (ZCS) or Zero Voltage Switched (ZVS) Quasi-Resonant Converters\n? Zero-Crossing Terminated One-Shot Timer\n? Precision 1%, Soft-Started 5V Reference\n? Programmable Restart Delay Following Fault\n? Voltage-Controlled Oscillator (VCO) with Programmable Minimum and Maximum Frequencies from 10kHz to 1MHz\n? Low Start-Up Current (150μA typical)\n? Dual 1 Amp Peak FET Drivers\n? UVLO Option for Off-Line or DC/DC Applications;

The UC1861-1868 family of ICs is optimized for the control of Zero Current Switched and Zero Voltage Switched quasi-resonant converters. Differences between members of this device family result from the various combinations of UVLO thresholds and output options. Additionally, the one-shot pulse steering logic is configured to program either on-time for ZCS systems (UC1865-1868), or off-time for ZVS applications (UC1861-1864).\n\n The primary control blocks implemented include an error amplifier to compensate the overall system loop and to drive a voltage controlled oscillator (VCO), featuring programmable minimum and maximum frequencies. Triggered by the VCO, the one-shot generates pulses of a programmed maximum width, which can be modulated by the Zero Detection comparator. This circuit facilitates \"true\" zero current or voltage switching over various line, load, and temperature changes, and is also able to accommodate the resonant components' initial tolerances.\n\n Under-Voltage Lockout is incorporated to facilitate safe starts upon power-up. The supply current during the under-voltage lockout period is typically less than 150μA, and the outputs are actively forced to the low state.\n\n UVLO thresholds for the UC1861/62/65/66 are 16.5V (ON) and 10.5V (OFF), whereas the UC1863/64/67/68 thresholds are 8V (ON) and 7V (OFF). After VCC exceeds the UVLO threshold, a 5V generator is enabled which provides bias for the internal circuits and up to 10mA for external usage.\n\n A Fault comparator serves to detect fault conditions and set a latch while forcing the output drivers low. The Soft-Ref pin serves three functions: providing soft start, restart delay, and the internal system reference. \n\n Each device features dual 1 Amp peak totem pole output drivers for direct interface to power MOSFETS. The outputs are programmed to alternate in the UC1861/63/65/67 devices. The UC1862/64/66/68 outputs operate in unison alllowing a 2 Amp peak current.

TITexas Instruments

德州儀器美國(guó)德州儀器公司

UC3863

Resonant-Mode Power Supply Controllers

TITexas Instruments

德州儀器美國(guó)德州儀器公司

UC3863

LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS

UTCUnisonic Technologies

友順友順科技股份有限公司

UC3863

Resonant-Mode Power Supply Controllers

TI1Texas Instruments

德州儀器美國(guó)德州儀器公司

UC3863

LOW COST POWER-SAVING MODE PWM CONTROLLER

UTCUnisonic Technologies

友順友順科技股份有限公司

UC3863L

LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS; UTC proprietary frequency hopping technology for Improved EMI performance.?? Power-saving mode for high light-load and standby efficiency Dynamic peak current limiting for constant output power Built-in synchronized slope compensation OLP with automatic recovery OTP and OVP with latch shut down VDD clamp for higher security Programmable PWM Frequency Gate output voltage clamped at 16V Low start-up current Cycle-by-cycle Current Limiting Under voltage lockout (UVLO) Few external components required;

The UTC? UC3863L is a high performance current mode PWM controller ideally suited for low standby power. The PWM switching frequency is programmable externally at normal operation. Low VDDstartup current make the power reliable on startup design and a large value resistor could be used in the startup circuit to minimize the standby power. At no load condition, the IC operates in power-saving mode for lower standby power, decreasing frequency for Higher conversion efficiency at light load condition.?? The UTC? UC3863L contains protection with automatic recovery including OLP (over load protection), OCP (cycle-by-cycle current limiting), and UVLO (VDD over voltage clamp and under voltage lockout). It also provides the protections including OTP (over temperature protection), OVP (over voltage protection) with latched shut down. To protect the power MOSFET, Gate-drive output is fixed up to 16V max. The internal slope compensation improves system stability at high PWM duty cycle output. Leading-edge blanking on current sense input removes the signal glitch, which offering minimal external component count in the design. Excellent EMI performance is achieved with UTC proprietary frequency hopping technique (ZL201020615247.1) together with soft driver control. Audio noise is eliminated due to switch frequency more than 20kHz during operation. The UTC UC3863L has such applications as: battery charger, power adaptor, set-top box power supplies, ink jet printers, open-frame SMPS.

UTCUnisonic Technologies

友順友順科技股份有限公司

UC3863_15

LOW COST POWER-SAVING MODE PWM CONTROLLER

UTCUnisonic Technologies

友順友順科技股份有限公司

UC3863_17

LOW COST POWER-SAVING MODE PWM CONTROLLER

UTCUnisonic Technologies

友順友順科技股份有限公司

UC3863A

LOW COST POWER-SAVING MODE PWM CONTROLLER

UTCUnisonic Technologies

友順友順科技股份有限公司

技術(shù)參數(shù)

  • Duty cycle (Max) (%):

    50

  • Supply voltage (Max) (V):

    22

  • UVLO thresholds on/off (V):

    8/7

  • Features:

    Error Amplifier

  • Operating temperature range (C):

    0 to 70

  • Rating:

    Catalog

  • Frequency (Max) (kHz):

    500

  • Gate drive (Typ) (A):

    1

供應(yīng)商型號(hào)品牌批號(hào)封裝庫(kù)存備注價(jià)格
TI
24+
SOIC|16
279100
免費(fèi)送樣原盒原包現(xiàn)貨一手渠道聯(lián)系
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24+
SOP
7500
絕對(duì)原裝自家現(xiàn)貨!真實(shí)庫(kù)存!歡迎來(lái)電!
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TI德州儀器
22+
24000
原裝正品現(xiàn)貨,實(shí)單可談,量大價(jià)優(yōu)
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TI/德州
2018+
SOIC
32500
德州代理承諾銷售原裝正品公司可開(kāi)正規(guī)17%增值稅票
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TEXAS
2016+
SOP16
6523
只做原裝正品現(xiàn)貨!或訂貨!
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TI
DIP16
00+
21
全新原裝進(jìn)口自己庫(kù)存優(yōu)勢(shì)
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TI
11+
SOIC-16
8000
全新原裝,絕對(duì)正品現(xiàn)貨供應(yīng)
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UNIT
24+
SOP16
10000
自己現(xiàn)貨
詢價(jià)
TI/TEXAS
23+
原廠封裝
8931
詢價(jià)
TI
23+
DIP16
5000
原裝正品,假一罰十
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更多UC3863供應(yīng)商 更新時(shí)間2025-7-29 17:06:00