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LM5070,pdf datasheet (Integrat
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2009-10-07
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The LM5070 power interface port and pulse width modulation
(PWM) controller provides a complete integrated solution
for Powered Devices (PD) that connect into Power over
Ethernet (PoE) systems. The LM5070 integrates an 80V,
400mA line connection switch and associated control for a
fully IEEE 802.3af compliant interface with a full featured
current mode pulse width modulator dc-dc converter. All
power sequencing requirements between the controller interface
and switch mode power supply (SMPS) are integrated
into the IC. Two options are available providing either
an 80% maximum duty cycle limit with slope compensation
(on the –80 suffix) device or a 50% maximum duty cycle limit
and no slope compensation on the (–50 suffix) device.
(PWM) controller provides a complete integrated solution
for Powered Devices (PD) that connect into Power over
Ethernet (PoE) systems. The LM5070 integrates an 80V,
400mA line connection switch and associated control for a
fully IEEE 802.3af compliant interface with a full featured
current mode pulse width modulator dc-dc converter. All
power sequencing requirements between the controller interface
and switch mode power supply (SMPS) are integrated
into the IC. Two options are available providing either
an 80% maximum duty cycle limit with slope compensation
(on the –80 suffix) device or a 50% maximum duty cycle limit
and no slope compensation on the (–50 suffix) device.
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