NCP1095 ONSEMI | Alldatasheet
Document overview
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Technical content
Features
- Fully Supports IEEE 802.3af/at and −3bt Specifications
- Supports Up to 5-Event Physical Layer Classification
- Assigned Power Level Up to 90 W
- Supports Autoclass
- 110 mA Typical Inrush Current Limiting
- Open Drain Power Good Indicator
- Support for Short MPS
- Pass Switch Disabling Input for Rear Auxiliary Supply Operation
- Proprietary 100 W+ Applications
- Over Current Protection
- Over Temperature Protection
- Junction Temperature Range of −40°C to +125°C
- Available in 16-pin TSSOP
- These Devices are Pb−Free and are RoHS Compliant www.onsemi.com TSSOP−16 CASE 948F MARKING DIAGRAM RELATED STANDARDS IEEE 802.3bt−2018 NCP1095 AL YYWW NCP1095 = Specific Device Code A = Assembly Location L = Wafer Lot YY = Year WW = Work Week Device Package Shipping †
ORDERING INFORMATION
NCP1095DBR2 TSSOP −16 (Pb−Free) 2500 / Tape & Reel NCP1095DB TSSOP −16 (Pb−Free) 96 / Tube †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D
Figure 1. Pin-out NCP1095 in 16-pin TSSOP (Top View)
16 NCL
VPP 1 Power Positive input power. CLA 2 Output Connect a class signature programming resistor to VPN. COSC 5 Analog Connect a 1 nF capacitor between COSC and VPN. ACS 6 Input Autoclass enable/disable input. DET 7 Output Connect a 26.1 k/C0087 detection resistor between DET and COSC. PSNS 9 Input Positive current sense line. Control output to disable the active rectifier bridge. Long Classification Finger Indicator. This pin is referenced to RTN. converter adjacent to NCP1095. Class result MSB output. This pin is referenced to RTN. Class result LSB output. This pin is referenced to RTN.
Figure 2. NCP1095 Block Diagram
www.onsemi.com ABSOLUTE MAXIMUM RATINGS Symbol Parameter Min Max Unit Conditions TJ Junction temperature −40 +150 °C TS Storage temperature −55 +150 °C VPP Input Power Supply −0.3 72 (Note 1) V Voltage with respect to VPN RTN Pass switch drain connection, application ground −0.3 72 (Note 1) V Voltage with respect to VPN, Pass switch in the off state PSNS Pass switch sense resistor voltage −0.3 3.6 V Voltage with respect to VPN DET Voltage on pin DET PGATE Pass switch gate drive voltage −0.3 11 V Voltage with respect to VPN PGO Power Good output −0.3 72 V Voltage with respect to RTN NCM Class result MSB output NCL Class result LSB output LCF Long Class Finger output ACS Voltage on AUTOCLASS pin −0.3 72 V Voltage with respect to VPN CLA, CLB Voltage on CLASSA or CLASSB pins GBR Active bridge control output COSC Voltage on pin COSC AUX Auxiliary supply detection input ESD−HBM Human Body Model 2 kV Per EIA−JESD22−A114 standard ESD−CDM Charged Device Model 500 V Per ESD−STM5.3.1 standard Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. NCP1095 tolerates transient overvoltages from the capacitor and/or TVS subjected to a surge according to IEC 61000−4−5. For extremely high cable discharge and surge protection, contact ON Semiconductor. THERMAL CHARACTERISTICS (Note 2) Symbol Characteristic Typical Value Unit /C0113JA Thermal Resistance, Junction-to-Air 90.3 °C/W 2. /C0113JA is obtained with 1S2P test board (1 signal – 2 plane) and natural convection. Refer to JEDEC JESD51 for details. RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit TJ Junction Temperature −40 +125 °C VPORT (Note 3) Input Power Supply (VPORT = VPP – VPN) 0 57 V Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. 3. Refer to ABSOLUTE MAXIMUM RATINGS for Safe Operating Area.
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ELECTRICAL CHARACTERISTICS
(All parameters are guaranteed for the recommended operating conditions unless otherwise noted) Symbol Parameter Min Typ Max Unit Condition DETECTION CHARACTERISTICS Rdetect Equivalent detection resistance 23.7 26.3 k/C0087RDET = 26.1 k/C0087 ±1%; 1 V ≤ VPORT ≤ 10.1 V VoffsetIC Detection offset voltage (IC part) 0 0.2 V CLASISFICATION CHARACTERISTICS Vcl_th Class/Mark current switchover threshold (Note 4) 10.1 12.5 V VPORT rising or falling Vcldis Classification current disable threshold (Note 4) 20.5 24.5 V VPORT rising or falling Iclsigq Quiescent current during classification 207 327 484 /C0109A VPORT = 12.5 V Vcsr CLASS driver voltage (Note 4) during class event Iclsig0 RclassA,B = 4.5 k/C0087 ±1% 1 4 mA 12.5 V ≤ VPORT ≤ 20.5 V Iclsig1 RclassA,B = 909 /C0087 ±1% 9 12 mA 12.5 V ≤ VPORT ≤ 20.5 V Iclsig2 RclassA,B = 511 /C0087 ±1% 17 20 mA 12.5 V ≤ VPORT ≤ 20.5 V Iclsig3 RclassA,B = 332 /C0087 ±1% 26 30 mA 12.5 V ≤ VPORT ≤ 20.5 V Iclsig4 RclassA,B = 232 /C0087 ±1% 36 44 mA 12.5 V ≤ VPORT ≤ 20.5 V Imark IPP during mark event range 1 2.3 4 mA 4.9 V ≤ VPORT ≤ 10.1 V tfce Short/Long first class event threshold 75 88 ms RDET = 26.1 k/C0087 ±1%; COSC = 1 nF ±2% tacspd Change to class signature ‘0’ current timing 75.5 87.5 ms Autoclass enabled RC OSCILLATOR CHARACTERISTICS fosc Frequency of the oscillator 26.8 kHz RDET = 26.1 k/C0087; COSC = 1 nF duty Oscillator duty cycle 50 % PASS SWITCH CURRENT CONTROL STATE CHARACTERISTICS Iinr Inrush current 85 110 135 mA 25 m/C0087 Sense Resistor Vdrain_pg RTN PowerGood threshold voltage (Note 4) 0.7 0.8 0.9 V RTN–VPN falling Vgate_pg PGATE PowerGood threshold voltage (Note 4) 6.9 8.5 10.0 V PGATE−VPN rising Vpgo_low PGO output low voltage − 0.15 0.50 V Isink = 2 mA. Referenced to RTN PASS SWITCH ON STATE CHARACTERISTICS Idd_on Operating current 257 407 601 /C0109A VPORT = 57 V Ioc Over current detection level 5.0 6.4 8.0 A 25 m/C0087 Sense Resistor Voc RTN overcurrent detection voltage (Note 4) 1.1 1.2 1.3 V RTN–VPN rising UNDER-VOLTAGE LOCK-OUT CHARACTERISTICS UVLO_H VPP UVLO threshold voltage (Note 4) 33.0 35.1 37.5 V VPORT rising UVLO_L VPP UVLO threshold voltage (Note 4) 30.0 32.3 34.5 V VPORT falling UVLO_hyst UVLO threshold hysteresis 2.4 2.8 3.3 V RESET CHARACTERISTICS Vrst VPP reset threshold voltage (Note 4) 2.81 3.85 4.9 V VPORT falling 4. Voltage referenced to VPN. 5. E.g. after overcurrent timeout
www.onsemi.com ELECTRICAL CHARACTERISTICS (continued) (All parameters are guaranteed for the recommended operating conditions unless otherwise noted) Symbol ConditionUnitMaxTypMinParameter AUXILIARY SUPPLY DETECTION CHARACTERISTICS AUX_H AUX input high level voltage (Note 4) 1.7 2.15 2.6 V AUX_L AUX input low level voltage (Note 4) 0.5 0.75 1.05 V AUX_hyst AUX threshold hysteresis 1.0 1.4 2.0 V AUX_pd AUX internal pull down 180 265 380 k/C0087VAUX = 0.5 V CLASSIFICATION RESULT INDICATOR CHARACTERISTICS Vlow NCL, NCM or LCF output low voltage − 0.15 0.50 V Isink = 2 mA. Referenced to RTN GBR CHARACTERISTICS Vgbr_low GBR output low voltage (Note 4) − 0.15 0.50 V Isink = 2 mA PASS SWITCH OFF STATE CHARACTERISTICS Idd_off_err Poweroff current, error state (Note 5) − 230 − /C0109A VPORT = 57 V, RTN = VPP Idd_off_aux Poweroff current, aux mode 198 315 463 /C0109A VPP−RTN = 57 V, AUX−VPN = 3.3 V THERMAL PROTECTION CHARACTERISTICS TSD Thermal shutdown threshold 150 − − °C Junction temperature 4. Voltage referenced to VPN. 5. E.g. after overcurrent timeout Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions.
Figure 3. General Application Schematic
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APPLICATION INFORMATION
The NCP1095 is a Power over Ethernet Powered Device (PD) interface controller with an external n-channel MOSFET load switch. Powered Device Interface The NCP1095 is located at the interface of the PD and will interact with the Power Sourcing Equipment (PSE) over the Ethernet cable. NCP1095 allows the device to be powered by an IEEE 802.3af/at or −3bt compliant PSE. It provides a detection signature, classification handshaking, inrush current limitation and operational overcurrent protection. A block diagram is shown in Figure 2. Each section will be explained in more detail below. Detection During the detection phase, the PSE will check if a valid or a non-valid detection signature is present. This will enable the PSE to differentiate between equipment supporting PoE requesting power and equipment either not supporting PoE or not requesting power. In order to be able to present a valid detection signature to the PSE, a 26.1 k /C0087 resistor must be inserted between the COSC and DET pins of NCP1095. During the detection phase all blocks of the chip are in power-down except for an internal reference, a comparator and two switches. When the voltage at the PD power interface is within the detection range, the COSC pin is pulled to VPP and the DET pin is pulled to VPN, resulting in the PD presenting a valid detection signature. The offset voltage of the input rectifier bridge should be between 0 and 1.7 V in the detection range (2.7 V ≤ V PD ≤ 10.1 V). When the PSE has detected a valid detection signature and continues towards powering on the PD, the COSC and DET switches are turned off in order to reduce the current consumption of the PD. Figure 4. Detection Circuit Classes and the corresponding power level they stand for. together to the same single resistor. Table 1. CLASSIFICATION RESISTOR VALUE
- 3bt compliant PDs should use Class 1, 2 or 3 instead of Class 0.
- All resistors must be 1% accurate.
types described in the 802.3af/at and −3bt PoE Standard.
power interface up to its internal power supply voltage. port voltage rises above the UVLO_H threshold. the voltage over an external sense resistor R SNS = 25 m/C0087. pass switch completely turned on. not to have too high a value (above 1.5 mF). Class 50 ms after the UVLO_H threshold was crossed. 59 /C0109F for Class1 PDs and to 99 /C0109F for Class2 PDs. will be held low by NCP1095. Figure 5. PGO Interfacing be calculated from the formula below.
based on the NCM and NCL outputs and the requested Class. Table 2. CLASSIFICATION RESULT OVERVIEW
- LCF is left floating: The PSE is categorized according to 802.3af/at (PSE Type 1 or Type 2).
- LCF is low: The PSE is categorized according to 802.3bt (PSE Type 3 or Type 4). Maintain Power Signature There is a minimum amount of current a PD needs to draw in order to allow the PSE to determine if the PD is still connected. This is called the Maintain Power Signature (MPS). If the PD no longer maintains this, the PSE may disconnect the power.
Figure 6. MPS depends upon the state of the LCF output. Table 3. MPS TIMING threshold will always be 10 mA. can be determined by the state of the NCM output).
Table 4. MPS CURRENT when generating current pulses for MPS. allocate its power among different PDs. amount of the port capacitance that can be used. enter the poweroff state and turn off the pass switch. detected as a PD requesting power. against soft and hard shorts. pass gate is switched off within 18 /C0109s in this case. is too high. An on-chip sensor monitors the temperature.
Figure 7. Complete Start-up Diagram of a Class 8 PD with Autoclass
Types of PSEs and four Types of PDs.
- Type 1 PSEs and PDs behave according to 802.3af/at
- Type 2 PSEs and PDs behave according to 802.3at
- Type 3 and 4 PSEs and PDs behave according to 802.3bt Table 5 gives an overview of the system parameters that are allowed and required for operation at a certain power level (assigned Class). An important parameter is the cable DC resistance (determined by cable type and length). In general a Cat 5 cable is required when using a Type 3 or Type 4 PD or PSE in the system or when both PSE and PD are of Type 2. Operation over 4-pair is reserved for Type 3 and 4 PSEs.
Table 5. SYSTEM PARAMETERS OVERVIEW
2 Cat 3
4 Cat 5
- Critical for: 44 V/4 W source connected to 3.84 W load over 20 /C0087.
10.Critical for: 44 V/15.4 W source connected to 13 W load over 20 /C0087.
(indicated by NCM, NCL and LCF being left floating). with PNP transistor in combination with an auxiliary supply. Figure 8. AUX Pin Interfacing which it can again be detected as a PD requesting power. auxiliary supply is detected at a Vport voltage below 10.1 V. GreenBridge input rectifiers to be disabled. order to be sure the PD does not source power. a different class B resistance value. Table 6. CLASSIFICATION RESISTOR VALUE
- All resistors must be 1% accurate.
The NCM, NCL and LCF outputs behave in a similar way. Table 7. CLASSIFICATION RESULT OVERVIEW can be retrieved from Table 3 based on the LCF output. so ACS should be connected to VPN. which is an amendment to IEEE Std 802.3/C0116−2018.
Figure 9. General Application Schematic with Auxiliary Supply GreenBridge is a trademarkof Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries.
TSSOP−16 CASE 948F−01 ISSUE B DATE 19 OCT 2006 SCALE 2:1 ÇÇÇ ÇÇÇ DIM MIN MAX MIN MAX INCHESMILLIMETERS A 4.90 5.10 0.193 0.200 B 4.30 4.50 0.169 0.177 D 0.05 0.15 0.002 0.006 F 0.50 0.75 0.020 0.030 G 0.65 BSC 0.026 BSC H 0.18 0.28 0.007 0.011 J 0.09 0.20 0.004 0.008 J1 0.09 0.16 0.004 0.006 K 0.19 0.30 0.007 0.012 K1 0.19 0.25 0.007 0.010 L 6.40 BSC 0.252 BSC M 0 8 0 8 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH. PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE. 5. DIMENSION K DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN EXCESS OF THE K DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 7. DIMENSION A AND B ARE TO BE DETERMINED AT DATUM PLANE −W−. /C0095/C0095/C0095/C0095 SECTION N−N SEATING PLANE IDENT. PIN 1 1 8 16 9 DETAIL E J B C D A K H G ÉÉÉ ÉÉÉ DETAIL E F M L 2X L/2 −U− SU0.15 (0.006) T SU0.15 (0.006) T SUM0.10 (0.004) V ST 0.10 (0.004) −T− −V− −W− 0.25 (0.010) 16X REFK N N GENERIC MARKING DIAGRAM* XXXX XXXX ALYW *This information is generic. Please refer to device data sheet for actual part marking. Pb−Free indicator, “G” or microdot “ /C0071”, may or may not be present. XXXX = Specific Device Code A = Assembly Location L = Wafer Lot Y = Year W = Work Week G or /C0071= Pb−Free Package 7.06 16X 0.36 16X 1.26 0.65 DIMENSIONS: MILLIMETERS PITCH SOLDERING FOOTPRINT MECHANICAL CASE OUTLINE PACKAGE DIMENSIONS ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ON Semiconductor does not convey any license under its patent rights nor the rights of others. 98ASH70247ADOCUMENT NUMBER: DESCRIPTION: Electronic versions are uncontrolled except when accessed directly from the Document Repository. Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red. PAGE 1 OF 1TSSOP−16 © Semiconductor Components Industries, LLC, 2019 www.onsemi.com
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