UC3869 PWM CONTROLLER Datasheet

UC3869 Datasheet, PDF, Equivalent


Part Number

UC3869

Description

HIGH VOLTAGE GREEN MODE PWM CONTROLLER

Manufacture

UTC

Total Page 8 Pages
Datasheet
Download UC3869 Datasheet


UC3869
UNISONIC TECHNOLOGIES CO., LTD
UC3869
Preliminary
HIGH VOLTAGE GREEN MODE
PWM CONTROLLER
DESCRIPTION
The UTC UC3869 is a highly integrated current mode PWM
control IC with high voltage start up, optimized for high
performance, low standby power consumption and cost effective
offline flyback converter applications.
PWM switching frequency at normal operation is internally fixed
and is trimmed to a tight range. 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.
The UTC UC3869 offers complete protection coverage
including Cycle-by-Cycle current limiting (OCP), VDD under voltage
lockout (UVLO), over load protection (OLP), over temperature
protection (OTP), and over voltage protection (OVP). 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 tone energy at below 22KHZ is minimized to
avoid audio noise during operation.
FEATURES
* High voltage startup
* Power on soft start reducing MOSFET Vds stress
* Efficiency and minimum standby power
* Frequency shuffling for EMI
* Audio noise free operation
* Fixed 65KHZ switching frequency
* Comprehensive protection coverage
VDD Under Voltage Lockout with Hysteresis (UVLO)
Cycle-by-cycle over current protection (OCP)
Overload Protection (OLP)
External programmable Over Temperature Protection (OTP)
VDD Over voltage Protection(OVP)
CMOS IC
www.unisonic.com.tw
Copyright © 2016 Unisonic Technologies Co., Ltd
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QW-R103-110.c

UC3869
UC3869
Preliminary
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UC3869L-D08-T
UC3869G-D08-T
- UC3869G-S08-R
Package
DIP-8
SOP-8
CMOS IC
Packing
Tube
Tape Reel
MARKING
DIP-8
SOP-8
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 8
QW-R103-110.c


Features UNISONIC TECHNOLOGIES CO., LTD UC3869 Preliminary HIGH VOLTAGE GREEN MODE PW M CONTROLLER  DESCRIPTION The UTC U C3869 is a highly integrated current mo de PWM control IC with high voltage sta rt up, optimized for high performance, low standby power consumption and cost effective offline flyback converter app lications. PWM switching frequency at n ormal operation is internally fixed and is trimmed to a tight range. At no loa d condition, the IC operates in power-s aving mode for lower standby power, dec reasing frequency for Higher conversion efficiency at light load condition. Th e internal slope compensation improves system stability at high PWM duty cycle output. Leading-edge blanking on curre nt sense input removes the signal glitc h, which offering minimal external comp onent count in the design. The UTC UC38 69 offers complete protection coverage including Cycle-by-Cycle current limiti ng (OCP), VDD under voltage lockout (UV LO), over load protection (OLP), over temperature protection (OTP.
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