Unisonic Technologies UC3869H
UC3869H 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. The internal slope compensation improves system stability at high PWM duty cycle output. The UTC UC3869H 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).| Part No. | UC3869H |
|---|---|
| Datasheet | UC3869H Download |
| Manufacturer |  Unisonic Technologies |
| Description | HIGH VOLTAGE GREEN MODE PWM CONTROLLER |
| Buy | Stock & Price |
DESCRIPTION
The UTC 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. 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 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 100KHZ switching frequency * Comprehensive protection coverage VDD Under Voltage Lockout...
