PD70101 / PD70201 Datasheet Features Power Over Ethernet IEEE802.3af and IEEE802.3at Compliant 802.3af/at PD Controller Support for 4-pair Applications of up to The PD70101 and PD70201 are integrated Powered Device Interface and 47.7W With a Single IC PWM controllers for a DC-DC converter used in IEEE802.3af and Two-events Classification IEEE802.3at applications. The PD70101 can be used for IEEE802.3af or Identification With a Level Signal IEEE802.3at Type 1 applications, while the PD70201 can also be used in Indicating Type 1 or Type 2 PSE IEEE802.3at Type 2 applications. Less Than 10 A (typical) Offset A single PD70201 can be used in 4-pair applications which consumes up Current During Detection to 47.7W. Signature Resistor is Disconnected These devices have a number of features designed to improve efficiency upon Detection and reliability: Programmable Classification Setting Detection and Classification: The front end interface includes detection With a Single Resistor and classification circuitry. The detection signature resistor is Integrated 0.6 Ohm Isolating MOSFET disconnected upon completion of the detection phase. The system then Switch With Inrush Current Limit begins the classification phase. Classification can be configured for Power Off DC-DC Input Capacitor Classes 0 to 4 via an external resistor. The PD70201 includes a Discharge two-events classification identification circuit which generates a flag to 100 kHz to 500 kHz Adjustable DC-DC inform the PD application whether the Power Source Equipment (PSE) is Switching Frequency Type 1 or Type 2. DC-DC Frequency Can Be Capacitor: A current limited internal MOSFET switch charges the input Synchronized to External Clock capacitor of the DC-DC converter. This capacitor is discharged in a timely Supports Low Power Mode Operation manner when the input power is removed. for Higher Efficiency 50% Maximum Gate drivers: The PWM DC-DC controller has two built-in gate drivers Duty Cycle designed to swing between VCC and GND. These 2 out-of-phase driver Soft-start Circuit to Control The Output stages can be configured for synchronous rectification or active clamp. Voltage Rise Time Peak current mode control: The DC-DC converter employs peak current Two out-of-phase driver stages for mode control for better line and load step response. The switching efficient synchronous rectification or frequency can be set from 100kHz to 500kHz, enabling a size and active clamp efficiency trade off. PoE Port Input UVLO with Programmable Threshold and Maximum duty cycle is limited to 50% to reduce the power MOSFET Hysteresis switch voltage to two times the input voltage a 150V rated MOSFET can be used for the primary side switch. The secondary synchronous Internal Differential Amplifier MOSFET voltage rating depends on the output voltage and can be higher Simplifying Non-isolated Step Down Converter or lower than the primary side MOSFET switch. Over Load and Short Circuit Protection 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 RoHS Compliant & Pb-Free current. An integrated startup bias circuit powers the DC-DC controller, until the device starts up by the voltage generated by the bootstrap circuit. Applications Low Voltage Protection Warning and Monitoring: Dual Under Voltage IEEE802.3at and IEEE802.3af Lock Out (UVLO), which monitors both the PoE Port Input Voltage and powered devices such as IP VCC, ensures reliable operation during any system disturbances. The phones, WLAN Access Points and PoE port UVLO has a programmable threshold and hysteresis to enable Network Cameras. tailoring to the desired turn on and turn off voltage. 48V Input Telcom/Networks Hot An internal current sense amplifier with a Kelvin connection allows the use Swappable Power Supply. of an extremely low resistor to measure the current sense threshold voltage (200 mV) which optimizes efficiency. Low Power Mode operation is provided to improve efficiency under light loads such as when the PD is in standby. The user can define at what power level the unit enters low power mode by means of a single resistor value. Copyright 2016 Microsemi Page 1 of 20 Rev.2.0, 17-Jan-2017 CPG PoE BU One Enterprise Aliso Viejo, CA 92656 USA PGND RCLP SS CSN RFREQ CSP PG SYNC VH HYST VCC VINS VAUX ENABLE VPP N/C PGND RCLP SS CSN RFREQ CSP PG SYNC VH HYST VCC VINS VAUX ENABLE VPP N/C PD70101 / PD70201 Datasheet Pin Configuration 32 31 30 29 28 27 26 25 32 31 30 29 28 27 26 25 1 24 SG RDET 1 24 SG RDET 2 23 VL PGOOD 2 23 VL PGOOD 3 22 GND 3 22 RREF RREF GND MSC MSC 4 21 FB 4 21 FB RCLASS RCLASS 70101 70201 5 20 5 20 DAO VPN IN DAO VPN IN YYWWX YYWWX 6 19 6 19 COMP COMP N/C N/C 18 7 18 AT FLAG* 7 VSP N/C VSP VPN OUT 8 17 VSN VPN OUT 8 17 VSN 9 10 11 12 13 14 15 16 9 10 11 12 13 14 15 16 Figure 1 Pinout QFN Package(Top View) YYWWX = Year /Week / lot code Ordering Information Ambient Temperature Type Package Part Number Packaging Type PD70101ILQ (IEEE802.3af) Bulk / Tube RoHS2 compliant, PD70101ILQ-TR (IEEE802.3af) Tape and Reel -40C to 85C Pb-free QFN 5x5 Plastic 32 pin PD70201ILQ (IEEE802.3at) Bulk / Tube Matte Tin Pin Finish PD70201ILQ-TR (IEEE802.3at) Tape and Reel Pin Description PD70101 PD70201 Pin Description Number Pin Name Pin Name Valid Detection Resistor: Connect a 24.9k, 1% resistor from this pin to 1 RDET RDET VPP. Open Drain Output (active low): This flag is generated to indicate the 2 PGOOD PGOOD power rails (VPN OUT) are ready. Bias current resistor for the PD Interface. Connect a 240k 1% resistor 3 RREF RREF between this pin and VPN IN. Power Classification Setting: Connect external class resistor between 4 RCLASS RCLASS this pin and VPN IN. Copyright 2015 Microsemi Page 2 of 20 Rev.2.0, 17-Jan-2017 CPG PoE BU One Enterprise Aliso Viejo, CA 92656 USA