DatasheetsPDF.com

UC3875L

UTC
Part Number UC3875L
Manufacturer UTC
Description LOW COST POWER-SAVING MODE PWM CONTROLLER
Published Apr 20, 2020
Detailed Description UNISONIC TECHNOLOGIES CO., LTD UC3875L LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS  DESCRIPTION Th...
Datasheet PDF File UC3875L PDF File

UC3875L
UC3875L

Overview
UNISONIC TECHNOLOGIES CO.
, LTD UC3875L LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS  DESCRIPTION The UTC UC3875L 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 UTC UC3875L 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) in UC3875L with latch up.
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 UC3875L has such applications as: battery charger, power adaptor, set-top box power supplies, ink jet printers, open-frame SMPS.
 FEATURES * UTC proprietary frequency hopping technology for Improved EMI performance.
* Lower than 30mW Standby Power Design * Dynamic peak current limiting for constant output power * Built-in synchronized slope compensation * OLP with automatic recovery * OTP and OVP with latch up * VDD clamp for higher security * Programmable frequency * Gate output voltage clamped at 16V * Low sta...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)