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UC3800 датащи(PDF) 1 Page - Unisonic Technologies

номер детали UC3800
подробное описание детали  LOW COST POWER-SAVING MODE PWM CONTROLLER
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производитель  UTC [Unisonic Technologies]
домашняя страница  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3800 датащи(HTML) 1 Page - Unisonic Technologies

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UNISONIC TECHNOLOGIES CO., LTD
UC3800
Preliminary
LINEAR INTEGRATED CIRCUIT
www.unisonic.com.tw
1 of 10
Copyright © 2015 Unisonic Technologies Co., Ltd
QW-R103-083.a
LOW COST POWER-SAVING
MODE PWM CONTROLLER
FOR FLYBACK CONVERTERS
DESCRIPTION
The UTC UC3800 is a high performance current mode PWM
controller ideally suited for low standby power. High voltage startup
is implemented in UTC UC3800, which features with short startup
time and no standby current. 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 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 UC3800 has such applications as: battery charger,
power adaptor, set-top box power supplies, ink jet printers,
open-frame SMPS.
FEATURES
SOP-8
* UTC proprietary frequency hopping technology for Improved EMI
performance.
* Power-saving mode for high light-load and standby efficiency
* Soft Start
* Dynamic peak current limiting for constant output power
* Built-in synchronized slope compensation
* OTP,OLP,OVP, LNO-OV, Brownout and VDD clamp for higher
security
* Fixed switch frequency 65kHz
* Gate output voltage clamped at 16V
* Low start-up current
* Cycle-by-cycle Current Limiting
* Under voltage lockout (UVLO)
* Few external components required
ORDERING INFORMATION
Ordering Number
Package
Packing
UC3800G-S08-R
SOP-8
Tape Reel


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