資料介紹
The LM5041B PWM controller contains all of the features
necessary to implement either current-fed or voltage-fed
push-pull or bridge power converters. These “Cascaded”
topologies are well suited for multiple output and higher power
applications. The LM5041B includes these four control outputs:
the buck stage controls (HD and LD) and the push-pull
control outputs (PUSH and PULL). Push-pull outputs are driven
at 50% nominal duty cycle at one half of the switching
frequency of the buck stage and can be configured for either
a guaranteed overlap time (for current-fed applications) or a
guaranteed non-overlap time (for voltage-fed applications).
Push-pull stage MOSFETs can be driven directly from the internal
gate drivers while the buck stage requires an external
driver such as the LM5102. The LM5041B includes a highvoltage
start-up regulator that operates over a wide input
range of 15V to 100V. The PWM controller is designed for
high-speed capability including an oscillator frequency range
up to 1 MHz and total propagation delays of less than 100 ns.
Additional features include line Under-Voltage Lock-Out
(UVLO), Soft-Start, an error amplifier, precision voltage reference,
and thermal shutdown.
necessary to implement either current-fed or voltage-fed
push-pull or bridge power converters. These “Cascaded”
topologies are well suited for multiple output and higher power
applications. The LM5041B includes these four control outputs:
the buck stage controls (HD and LD) and the push-pull
control outputs (PUSH and PULL). Push-pull outputs are driven
at 50% nominal duty cycle at one half of the switching
frequency of the buck stage and can be configured for either
a guaranteed overlap time (for current-fed applications) or a
guaranteed non-overlap time (for voltage-fed applications).
Push-pull stage MOSFETs can be driven directly from the internal
gate drivers while the buck stage requires an external
driver such as the LM5102. The LM5041B includes a highvoltage
start-up regulator that operates over a wide input
range of 15V to 100V. The PWM controller is designed for
high-speed capability including an oscillator frequency range
up to 1 MHz and total propagation delays of less than 100 ns.
Additional features include line Under-Voltage Lock-Out
(UVLO), Soft-Start, an error amplifier, precision voltage reference,
and thermal shutdown.
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