PD70201 Description
PD70101 and PD70201 PoE IEEE® 802.3af/at PD Controller Introduction The PD70101 and PD70201 devices are integrated Powered Device (PD) interface and PWM controllers for a DC-DC converter used in IEEE® 802.3af and IEEE® 802.3at applications. The PD70101 device can be used for IEEE 802.3af or IEEE 802.3at Type 1 applications, while the PD70201 device can also be used in IEEE 802.3at Type 2 applications. A single...
PD70201 Key Features
- Detection and Classification: The front-end interface includes detection and classification circuitry. The detection sig
- Capacitor: A current-limited internal MOSFET switch charges the input capacitor of the DC-DC converter. This capacitor i
- Gate drivers: The PWM DC-DC controller has two built-in gate drivers designed to swing between VCC and GND. These two ou
- Peak current mode control: The DC-DC converter employs peak current mode control for better line and load step response.
- Maximum duty cycle is limited to 50% to reduce the power MOSFET switch voltage to two times the input voltage; a 150V ra
- Soft-Start circuit: The devices include a soft-start circuit to control the output voltage rise time (user settable) at
- Low Voltage Protection Warning and Monitoring: Dual Under Voltage Lock Out (UVLO), which monitors both the PoE Port Inpu
PD70201 Applications
- Detection and Classification: The front-end interface includes detection and classification circuitry. The detection signature resistor is disconnected upon ple
- Capacitor: A current-limited internal MOSFET switch charges the input capacitor of the DC-DC converter. This capacitor is discharged in a timely manner when the
- Gate drivers: The PWM DC-DC controller has two built-in gate drivers designed to swing between VCC and GND. These two out-of-phase driver stages can be configur
- Peak current mode control: The DC-DC converter employs peak current mode control for better line and load step response. The switching frequency can be set from
- Maximum duty cycle is limited to 50% to reduce the power MOSFET switch voltage to two times the input voltage; a 150V rated MOSFET can be used for the primary s
- Soft-Start circuit: The devices include a soft-start circuit to control the output voltage rise time (user settable) at start-up, and to limit the inrush curren
- Low Voltage Protection Warning and Monitoring: Dual Under Voltage Lock Out (UVLO), which monitors both the PoE Port Input Voltage and VCC, ensures reliable oper