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reference designNCP81231 | Demoboard STR-USBC-4PORT-200W-EVK

Onsemi NCP81231 | Demoboard STR-USBC-4PORT-200W-EVK

NCP81231: Buck Controller, USB Power Delivery and Type-C Applications

Overview

TopologyBuck Converter
Switching frequency150-1200 kHz
IC revision3

Description

The NCP81231 is a synchronous buck that is optimized for converting battery voltage or adaptor voltage into power supply rails required in notebook, tablet, and desktop systems, as well as many other consumer devices using USB PD standard and C−Type cables. The NCP81231 is fully compliant to the USB Power Delivery Specification when used in conjunction with a USB PD or C−Type Interface Controller. NCP81231 is designed for applications requiring dynamically controlled slew rate limited output voltage.

Features

  • Wide Input Voltage Range: from 4.5 V to 28 V
  • Dynamically Programmed Frequency from 150 kHz to 1.2 MHz
  • I2C Interface
  • Real Time Power Good Indication
  • Controlled Slew Rate Voltage Transitioning
  • Feedback Pin with Internally Programmed Reference
  • High Resolution DAC Voltage
  • Two Independent Current Sensing Inputs
  • Support Inductor DCR Sensing
  • Over Temperature Protection
  • Adaptive Non−Overlap Gate Drivers
  • Filter Capacitor Switch Control
  • 100% Duty Cycle Operation
  • Latched Over−Voltage and Over−Current Protection
  • Dead Battery Power Support
  • 5 x 5 mm QFN32 Package

Typical applications

  • Notebooks, Tablets, Desktops, Gaming, Monitors, TVs, and Set Top Boxes, Consumer Electronics,
  • Power Banks, Car Chargers, Docking Stations

More information

Parts approved by Onsemi

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(mm)
To
Ti
Application
C
VR(V (DC))
Safety Class
dV/dt(V/µs)
DF @ 1 kHz(%)
RISO
Pitch(mm)
W(mm)
H(mm)
ISAT,10%(A)
fres(MHz)
Version
SW(mm)
Endurance(h)
IRIPPLE(mA)
ILeak(µA)
DF(%)
Ø D(mm)
Pins
Type
Mount
G(mm)
Working Voltage(V (AC))
Operating Temperature
Operation Force(g)
Schematic
Packaging
VRMS(V)
VDC(V)
VBR(V)
IPeak(A)
Wmax(J)
PDiss(W)
VDE Approval
L(µH)
IR(A)
RDC max.(mΩ)
SamplesAvailability & Sample
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61300211121
SPECWR-PHD Pin Header - Single, 5.08 mm, –
Simu­lation–
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Single
Length5.08 mm
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Insulation Resistance1000 MΩ
Pitch2.54 mm
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Pins2 
TypeStraight 
MountTHT 
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Working Voltage250 V (AC)
Operating Temperature -40 °C up to +105 °C
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PackagingBag 
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Rated Current3 A
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971100365
SPECWA-SPAIE Plastic Spacer Stud, metric, internal/ external, 10 mm, M3
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Downloads3 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWA-SPAIE Plastic Spacer Stud, metric, internal/ external
Length10 mm
Outer ThreadM3 
Inner ThreadM3 
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SW6 mm
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Operating Temperature -30 °C up to +110 °C
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PackagingBag 
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7447231101
SPECWE-TI Radial Leaded Wire Wound Inductor, 11 mm, –
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Downloads15 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-TI Radial Leaded Wire Wound Inductor
Length11 mm
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Width11 mm
Height19 mm
Saturation Current @ 10%3.1 A
Self Resonant Frequency3.6 MHz
VersionHeat Shrinking Tube 
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MountTHT 
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Operating Temperature -40 °C up to +125 °C
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Inductance100 µH
Rated Current2.6 A
DC Resistance90 mΩ
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860240473003
SPECWCAP-AT1H Aluminum Electrolytic Capacitors, 11 mm, –
Simu­lation
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-AT1H Aluminum Electrolytic Capacitors
Length11 mm
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Capacitance47 µF
Rated Voltage25 V (DC)
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Pitch2.5 mm
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Endurance 5000
Ripple Current160 mA
Leakage Current11.75 µA
Dissipation Factor14 %
Diameter6.3 mm
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PackagingAmmopack 
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860240574004
SPECWCAP-AT1H Aluminum Electrolytic Capacitors, 11.5 mm, –
Simu­lation
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-AT1H Aluminum Electrolytic Capacitors
Length11.5 mm
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Capacitance47 µF
Rated Voltage35 V (DC)
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Pitch3.5 mm
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Endurance 8000
Ripple Current240 mA
Leakage Current16.45 µA
Dissipation Factor12 %
Diameter8 mm
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820412711
SPECWE-VD Disk Varistor, 12.5 mm, –
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-VD Disk Varistor
Length12.5 mm
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Application230 VAC 
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Width4.4 mm
Height16 mm
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VersionTHT 
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Diameter12.5 mm
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MountTHT 
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Operating Temperature -40 °C up to +105 °C
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AC Operating Voltage275 V
DC Operating Voltage350 V
(Reverse) Breakdown Voltage430 V
(Reverse) Peak Pulse Current3500 A
Energy Absorption80 J
Power Dissipation0.4 W
VDE ApprovalYes 
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890324023023
SPECWCAP-FTX2 Film Capacitors, 13 mm, –
Simu­lation
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Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-FTX2 Film Capacitors
Length13 mm
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ApplicationAcross the mains 
Capacitance100 nF
Rated Voltage275 V (DC)
Safety ClassX2 
Rate of Voltage Rise300 V/µs
Dissipation Factor0.1 %
Insulation Resistance30 GΩ
Pitch10 mm
Width7 mm
Height13 mm
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MountBoxed THT 
Pin length18 mm
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Operating Temperature -40 °C up to +105 °C
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PackagingBulk 
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890324024003
SPECWCAP-FTX2 Film Capacitors, 15 mm, –
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Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-FTX2 Film Capacitors
Length15 mm
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ApplicationAcross the mains 
Capacitance330 nF
Rated Voltage275 V (DC)
Safety ClassX2 
Rate of Voltage Rise260 V/µs
Dissipation Factor0.1 %
Insulation Resistance30 GΩ
Pitch12.5 mm
Width8.5 mm
Height14 mm
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MountBoxed THT 
Pin length18 mm
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Operating Temperature -40 °C up to +105 °C
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PackagingBulk 
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860240475007
SPECWCAP-AT1H Aluminum Electrolytic Capacitors, 16 mm, –
Simu­lation
Availability
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-AT1H Aluminum Electrolytic Capacitors
Length16 mm
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Capacitance220 µF
Rated Voltage25 V (DC)
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Pitch5 mm
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Endurance 10000
Ripple Current580 mA
Leakage Current55 µA
Dissipation Factor14 %
Diameter10 mm
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PackagingAmmopack 
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860080578019
SPECWCAP-ATLI Aluminum Electrolytic Capacitors, 20 mm, –
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-ATLI Aluminum Electrolytic Capacitors
Length20 mm
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Capacitance680 µF
Rated Voltage35 V (DC)
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Pitch5 mm
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Endurance 5000
Ripple Current2260 mA
Leakage Current238 µA
Dissipation Factor9 %
Diameter13 mm
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61302021021
SPECWR-PHD Pin Header - Dual, 25.4 mm, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation–
Availability
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Dual
Length25.4 mm
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Insulation Resistance1000 MΩ
Pitch2.54 mm
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Pins20 
TypeAngled 
MountTHT 
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Working Voltage250 V (AC)
Operating Temperature -40 °C up to +105 °C
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PackagingBag 
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Rated Current3 A
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7447055
SPECWE-FI Leaded Toroidal Line Choke, 26 mm, –
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-FI Leaded Toroidal Line Choke
Length26 mm
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Width13 mm
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MountTHT 
Pin length15 mm
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Operating Temperature -40 °C up to +105 °C
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Inductance150 µH
Rated Current5.4 A
DC Resistance42 mΩ
–Check availability
970300365
SPECWA-SPAII Plastic Spacer Stud, metric, internal/ internal, 30 mm, –
Simu­lation–
Availability
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Downloads3 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWA-SPAII Plastic Spacer Stud, metric, internal/ internal
Length30 mm
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Inner ThreadM3 
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SW6 mm
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Operating Temperature -30 °C up to +110 °C
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PackagingBag 
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450301014042
SPECWS-SLTV THT Mini Slide Switch, Opposite Side Connection 10x2.5 mm, –, –
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Downloads6 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWS-SLTV THT Mini Slide Switch, Opposite Side Connection 10x2.5 mm
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Rated Voltage12 V (DC)
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Insulation Resistance10000 MΩ
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Operating Temperature -40 °C up to +85 °C
Operation Force800 g
SchematicSPDT 
PackagingBulk 
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Rated Current0.5 A
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709940300
SPECWA-SNTE Snap-In Stop Spacer for Printed Circuit Boards, –, –
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Downloads3 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWA-SNTE Snap-In Stop Spacer for Printed Circuit Boards
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Inner ThreadM3 
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Height2.4 mm
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SW5.5 mm
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Operating Temperature -30 °C up to +85 °C
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PackagingBag 
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750317576
SPECInductor, –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product series Inductor
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750316907
SPECTransformer, –, –
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product series Transformer
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