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reference designNCP4371

Onsemi NCP4371

Qualcomm Quick Charge 3.0 HVDCP Controller

Overview

TopologyFlyback Converter
Input voltage90-265 V
Output 15 V / 2 A
IC revisionP0

Description

NCP4371 is a USB secondary side fast-charging controller, supporting Qualcomm Quick Charge™ 3.0 (QC 3.0) High Voltage Dedicated Charging Port (HVDCP) Class A and Class B specification. NCP4371 allows for selection of the output voltage of an AC-DC USB adapter based on commands from the Portable Device (PD) being powered. Selecting a higher charging voltage will reduce the charging current for a given power level resulting in reduced IR drops and increased system efficiency. Another advantage of QC3.0 is a decreased battery charging time and a reduced PD system cost thanks to the ability to select an optimum charging voltage. This eliminates the need for costly DC-DC converters within the PD. The USB-bus voltage can be controlled in discreet steps from 3.6V up to 20V. The output current is limited not to exceed maximum allowable power level. The NCP4371 resides at the secondary (isolated) side of the adapter. It includes voltage and current feedback regulation eliminating the need for a shunt regulator such as TL431. The NCP4371 provides charging current limits down to VBUS=2.2V protecting the portable device from excessive currents in case of a soft short-circuit condition. The NCP4371 integrates a safe-discharge circuitry to quickly and reliably discharge output capacitors in case the USB cable is unplugged or connected to a 5V only USB port.

Features

  • Supports Qualcomm Quick Charge 3.0 HVDCP Class A/B
  • Output Voltage Can be Configured in Discreet Steps from
  • Class A: 3.6 V up to 12 V
  • Class B: 3.6 V up to 20 V
  • Compatible with USB Battery Charging Specification Revision 1.2(USB BC1.2)
  • Constant Voltage and Constant Current Regulation
  • Soft Short−Circuit Current Limitation Down to VBUS = 2.2 V
  • Removes a Need for the Secondary Side Shunt Regulator such asTL431
  • Output Capacitor Safe−Discharge Circuitry at Cable Unplug
  • Fast Dynamic Response
  • Built−in Power Limiting Function
  • Low Supply Current
  • Wide Operating Input Voltage Range: 2.2 V to 28 V
  • This is Pb−free Device

Typical applications

  • Tablets and Other Portable Devices
  • Fast Charging AC/DC Adapters for Smart Phones

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IR(A)
ISAT,10%(A)
RDC max.(Ω)
fres(MHz)
Version
C
VR(V (DC))
Endurance(h)
IRIPPLE(mA)
ILeak(µA)
DF(%)
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Ø D(mm)
L(mm)
Packaging
Application
Interface Type
Type
Variant
Gender
Pins
Mount
Working Voltage(V (AC))
SamplesAvailability & Sample
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7447462010
SPECWE-TI Radial Leaded Wire Wound Inductor, 1 µH, 8.5 A
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TI Radial Leaded Wire Wound Inductor
Inductance1 µH
Rated Current8.5 A
Saturation Current @ 10%8.5 A
DC Resistance0.015 Ω
Self Resonant Frequency140 MHz
VersionHeat Shrinking Tube 
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Length6 mm
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MountTHT 
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7447462221
SPECWE-TI Radial Leaded Wire Wound Inductor, 220 µH, 0.5 A
Simu­lation
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TI Radial Leaded Wire Wound Inductor
Inductance220 µH
Rated Current0.5 A
Saturation Current @ 10%0.57 A
DC Resistance1.2 Ω
Self Resonant Frequency4.8 MHz
VersionHeat Shrinking Tube 
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Length6 mm
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MountTHT 
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870025374005
SPECWCAP-PTG5 Aluminum Polymer Capacitors, –, –
Simu­lation
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Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-PTG5 Aluminum Polymer Capacitors
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Capacitance330 µF
Rated Voltage16 V (DC)
Endurance 2000
Ripple Current4500 mA
Leakage Current528 µA
Dissipation Factor8 %
Pitch3.5 mm
Diameter8 mm
Length8 mm
PackagingAmmopack 
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MountRadial THT 
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614104150121
SPECWR-USB Standard Connectors, –, 1.5 A
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-USB Standard Connectors
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Rated Current1.5 A
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PackagingTape and Reel & Mylar 
ApplicationUSB 2.0 
Interface TypeType A 
TypeHorizontal - Short Type 
Variantwith Clips 
GenderReceptacle 
Pins4 
MountTHT 
Working Voltage30 V (AC)
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750315544
SPECOffline Transformer, –, –
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Status Activei| Production is active. Expected lifetime: >10 years.
Product series Offline Transformer
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