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UCC3810DWUNIN/a12avaiDual Channel Synchronized Current Mode PWM
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UCC3810DW-UCC3810DWTR-UCC3810N
Dual Channel Synchronized Current Mode PWM
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FEATURES DESCRIPTION
UCC2810
UCC3810
SLUS162D–FEBRUARY 1999–REVISED FEBRUARY 2007
DUAL CHANNEL SYNCHRONIZED CURRENT-MODE PWM
Single Oscillator Synchronizes Two PWMs The UCC3810isa high-speed BiCMOS controller
integrating two synchronized pulse width modulators• 150-µA Startup Supply Current
for usein off-line and dc-to-dc power supplies. The• 2-mA Operating Supply Current UCC3810 family provides perfect synchronization• Operationto1 MHz between two PWMs by using the same oscillator. Internal Soft-Start The oscillator’s sawtooth waveform can be used for
slope compensationif required.• Full-Cycle Fault Restart
Using a toggle flip-flop to alternate between• Internal Leading-Edge Blankingof the Current
modulators, the UCC3810 ensures that one PWMSense Signal
does not slave, interfere, or otherwise affect the• 1-A Totem Pole Outputs other PWM. This toggle flip- flop also ensures that• 75-ns Typical Response from Current Sense each PWMis limitedto 50% maximum duty cycle,to Output insuring adequate off-time to reset magnetic
elements. This device contains manyof the same• 1.5% Tolerance Voltage Reference elements of the UC3842 current mode controller
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