Microchip's PD70201 is a highly integrated IC that serves as both a Powered Device (PD) interface and a PWM controller for DC/DC converters in IEEE 802.3at Type 2 applications. Equipped with an internal 0.6 Ohm FET, this versatile IC is capable of supporting both IEEE 802.3af and IEEE 802.3at applications.
The PD70201 is designed to cater to 4-pair applications, allowing for a power consumption of up to 47.7 W. This flexibility enables it to meet the demanding power requirements of various systems. To enhance efficiency and reliability, Microchip has incorporated several key features into the PD70201.
These features include detection and classification capabilities, ensuring seamless integration and compatibility with power sourcing equipment. The inclusion of a capacitor, gate drivers, and peak current mode control further optimizes performance by regulating power delivery.
Moreover, the PD70201 incorporates a maximum duty cycle and soft-start circuit, enabling smooth startup operations while effectively managing power distribution. Additionally, it offers low voltage protection warning and monitoring mechanisms, safeguarding the device and overall system from potential voltage-related issues.
Overall, Microchip's PD70201 seamlessly combines essential features and functionalities to deliver superior efficiency, reliability, and performance in IEEE 802.3at Type 2 applications.
IEEE 802.3at Type 2 compliant
Support for 4-pair applications of up to 48 W with a single IC
Two-events classification flag
Less than 10 µA (typ.) offset current during detection
Signature resistor is disconnected upon detection
Programmable classification setting with a single resistor
Integrated 0.6 Ohm isolating MOSFET switch with inrush current limit
Power off DC/DC input capacitor discharge
100 kHz to 500 kHz adjustable DC/DC switching frequency
DC/DC frequency can be synchronized to external clock
Supports low-power mode operation for higher efficiency
Up to 50% duty cycle
Soft-start circuit to control the output voltage rise time
Two out-of-phase driver stages for efficient synchronous rectification or active clamp
PoE port input UVLO with programmable threshold and hysteresis
Internal differential amplifier simplifying non-isolated step-down converter
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