Secondary Side Average Current Mode Controller

The UC1849 family of average current mode controllers accurately accom- plishes secondary side average current mode control. The secondary side output voltage is regulated by sensing the output voltage and differentially sensing the AC switching current. The sensed output voltage drives a volt- age error Amplifier The AC switching current, monitored by a Current Sense resistor, drives a high bandwidth, low offset Current Sense Amplifier The outputs of the voltage error Amplifier and Current Sense Amplifier differential- ly drive a high bandwidth, integrating current error Amplifier The sawtooth waveform at the current error Amplifier output is the amplified and inverted inductor current sensed through the resistor. This inductor current down- slope compared to the PWM ramp achieves slope compensation, which gives an accurate and inherent fast transient response to changes in load. The UC1849 features load share, Oscillator synchronization, undervoltage lockout, and programmable output control. Multiple chip operation CAN be achieved by connecting up to ten UC1849 chips in parallel.The SHARE bus and CLKSYN bus provide load sharing and synchronization to the fastest Oscillator respectively. The UC1849 is an ideal controller to achieve high power, secondary side average current mode control. By Texas Instruments
UC1849 's PackagesUC1849 's pdf datasheet



UC1849 Pinout, Pinouts
UC1849 pinout,Pin out
This is one package pinout of UC1849,If you need more pinouts please download UC1849's pdf datasheet.

UC1849 Application circuits
UC1849 circuits
This is one application circuit of UC1849,If you need more circuits,please download UC1849's pdf datasheet.


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