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NCP1095DBR2

onsemi · Power Over Ethernet Controllers · TSSOP-16

NCP1095DBR2 from onsemi, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VPP	power_in	Positive input power; connect to the positive terminal of the rectifier bridge (absolute max 72 V with respect to VPN, recommended VPORT 0 to 57 V).
2	CLA	output	Connect a class signature programming resistor to VPN (RclassA, see classification section for recommended values).
3	CLB	output	Connect a class signature programming resistor to VPN (RclassB, see classification section for recommended values).
4	AUX	input	Auxiliary supply detection input referenced to VPN; when pulled high it turns off the pass switch and drives GBR low.
5	COSC	passive	Connect a 1 nF capacitor between COSC and VPN; this pin is pulled to VPP during the detection phase.
6	ACS	input	Autoclass enable/disable input; pull to VPN to disable Autoclass, leave floating to enable Autoclass.
7	DET	output	Connect a 26.1 kΩ detection resistor between DET and COSC; this pin is pulled to VPN during the detection phase.
8	VPN	power_in	Negative input power (ground); connect to the negative terminal of the rectifier bridge.
9	PSNS	input	Positive current sense line; connect to the positive side of the external sense resistor and the source of the external pass transistor (max 3.6 V with respect to VPN).
10	PGATE	output	Gate driver for the external pass transistor (max 11 V with respect to VPN).
11	GBR	output	Open-drain control output to disable the active rectifier bridge, referenced to VPN.
12	RTN	power_in	DC/DC controller power return; connect to the drain of the external pass transistor.
13	LCF	output	Open-drain Long Classification Finger indicator referenced to RTN; connect with a pull-up resistor to the logic supply.
14	PGO	output	Open-drain Power Good indicator referenced to RTN, floating when power good is active; must be used to enable/disable the adjacent main DC/DC converter.
15	NCM	output	Open-drain class result MSB output referenced to RTN; connect with a pull-up resistor to the logic supply.
16	NCL	output	Open-drain class result LSB output referenced to RTN; connect with a pull-up resistor to the logic supply.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	TSSOP-16
Category	Power Supply Chip
Pins	16

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Equivalent detection resistance	Rdetect	23.7		26.3	kΩ	RDET = 26.1 kΩ ±1%; 1 V ≤ VPORT ≤ 10.1 V	5
Detection offset voltage (IC part)	VoffsetIC	0		0.2	V		5
Class/Mark current switchover threshold	Vcl_th	10.1		12.5	V	VPORT rising or falling	5
Classification current disable threshold	Vcldis	20.5		24.5	V	VPORT rising or falling	5
Quiescent current during classification	Iclsigq	207	327	484	µA	VPORT = 12.5 V	5
CLASS driver voltage during class event	Vcsr	8.5	9.15	9.7	V	12.5 V ≤ VPORT ≤ 20.5 V	5
Class signature current 0	Iclsig0	1		4	mA	RclassA,B = 4.5 kΩ ±1%; 12.5 V ≤ VPORT ≤ 20.5 V	5
Class signature current 1	Iclsig1	9		12	mA	RclassA,B = 909 Ω ±1%; 12.5 V ≤ VPORT ≤ 20.5 V	5
Class signature current 2	Iclsig2	17		20	mA	RclassA,B = 511 Ω ±1%; 12.5 V ≤ VPORT ≤ 20.5 V	5
Class signature current 3	Iclsig3	26		30	mA	RclassA,B = 332 Ω ±1%; 12.5 V ≤ VPORT ≤ 20.5 V	5
Class signature current 4	Iclsig4	36		44	mA	RclassA,B = 232 Ω ±1%; 12.5 V ≤ VPORT ≤ 20.5 V	5
IPP during mark event range	Imark	1	2.3	4	mA	4.9 V ≤ VPORT ≤ 10.1 V	5
Short/Long first class event threshold	tfce	75		88	ms	RDET = 26.1 kΩ ±1%; COSC = 1 nF ±2%	5
Change to class signature '0' current timing	tacspd	75.5		87.5	ms	Autoclass enabled	5
Inrush current	Iinr	85	110	135	mA	25 mΩ Sense Resistor	5
RTN PowerGood threshold voltage	Vdrain_pg	0.7	0.8	0.9	V	RTN-VPN falling	5
PGATE PowerGood threshold voltage	Vgate_pg	6.9	8.5	10	V	PGATE−VPN rising	5
PGO output low voltage	Vpgo_low		0.15	0.5	V	Isink = 2 mA. Referenced to RTN	5
Operating current	Idd_on	257	407	601	µA	VPORT = 57 V	5
Over current detection level	Ioc	5	6.4	8	A	25 mΩ Sense Resistor	5
RTN overcurrent detection voltage	Voc	1.1	1.2	1.3	V	RTN-VPN rising	5
VPP UVLO threshold voltage (rising)	UVLO_H	33	35.1	37.5	V	VPORT rising	5
VPP UVLO threshold voltage (falling)	UVLO_L	30	32.3	34.5	V	VPORT falling	5
UVLO threshold hysteresis	UVLO_hyst	2.4	2.8	3.3	V		5
VPP reset threshold voltage	Vrst	2.81	3.85	4.9	V	VPORT falling	5
AUX input high level voltage	AUX_H	1.7	2.15	2.6	V		6
AUX input low level voltage	AUX_L	0.5	0.75	1.05	V		6
AUX threshold hysteresis	AUX_hyst	1	1.4	2	V		6
AUX internal pull down	AUX_pd	180	265	380	kΩ	VAUX = 0.5 V	6
NCL, NCM or LCF output low voltage	Vlow		0.15	0.5	V	Isink = 2 mA. Referenced to RTN	6
GBR output low voltage	Vgbr_low		0.15	0.5	V	Isink = 2 mA	6
Poweroff current, aux mode	Idd_off_aux	198	315	463	µA	VPP−RTN = 57 V, AUX−VPN = 3.3 V	6
Thermal shutdown threshold	TSD	150			°C	Junction temperature	6
Frequency of the oscillator	fosc		26.8		kHz	RDET = 26.1 kΩ; COSC = 1 nF	5
Oscillator duty cycle	duty		50		%		5
Poweroff current, error state	Idd_off_err		230		µA	VPORT = 57 V, RTN = VPP	6
Junction temperature (absolute maximum)	TJ	-40		150	°C		4
Storage temperature	TS	-55		150	°C		4
Input Power Supply VPP	VPP	-0.3		72	V	Voltage with respect to VPN	4
RTN pass switch drain connection	RTN	-0.3		72	V	Voltage with respect to VPN, Pass switch in the off state	4
PSNS / DET voltage	PSNS	-0.3		3.6	V	Voltage with respect to VPN	4
PGATE gate drive voltage	PGATE	-0.3		11	V	Voltage with respect to VPN	4
PGO, NCM, NCL, LCF output voltage	PGO	-0.3		72	V	Voltage with respect to RTN	4
ACS, CLA, CLB, GBR, COSC, AUX voltage	ACS	-0.3		72	V	Voltage with respect to VPN	4
ESD Human Body Model	ESD-HBM			2	kV	Per EIA-JESD22-A114 standard	4
ESD Charged Device Model	ESD-CDM			500	V	Per ESD-STM5.3.1 standard	4
Thermal Resistance, Junction-to-Air	RθJA		90.3		°C/W	1S2P test board, natural convection	4
Junction Temperature (recommended)	TJ	-40		125	°C		4
Input Power Supply (VPORT = VPP, VPN)	VPORT	0		57	V		4

CAD (KiCad official)

Symbol: NCP1095DBR2
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)
3D model files: ncp1095dbr2-etched.step / ncp1095dbr2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncp1095dbr2.step / ncp1095dbr2.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: onsemi datasheet (17 pp, sha256 fdf51c8edaeacbc1, retrieved 2026-10-23, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF