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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 Currentfor 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 RestartUsing a toggle flip-flop to alternate between•
Internal Leading-Edge Blankingof the Currentmodulators, the UCC3810 ensures that one PWM
Sense Signaldoes 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
