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PDF NCP4371 Data sheet ( Hoja de datos )
| Número de pieza | NCP4371 | |
| Descripción | 3.0 HVDCP Controller | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCP4371
Product Preview
Qualcomm Quick Charget
3.0 HVDCP Controller
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 3.6 V up to 20 V. 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 = 2.2 V 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 5 V 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 as
TL431
• 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
• Fast Charging AC/DC Adapters for Smart Phones, Tablets and Other
Portable Devices
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
www.onsemi.com
8
1
SOIC−8
D SUFFIX
CASE 751
MARKING DIAGRAM
8
XXXXX
ALYWG
G
1
XXXXX = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
PIN CONNECTIONS
DISCHARGE
DRIVE
ISNS
COMP
(Top View)
VCC
GND
D−
D+
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 12 of this data sheet.
© Semiconductor Components Industries, LLC, 2016
March, 2016 − Rev. P1
1
Publication Order Number:
NCP4371/D
1 page  
NCP4371
Table 3. ELECTRICAL CHARACTERISTICS
−40°C ≤ TJ ≤ 125°C; VCC = 5 V; unless otherwise noted. Typical values are at TJ = +25°C.
Parameter
Test Conditions
Symbol Min Typ Max Unit
CURRENT CONTROL LOOP OTA
Sink Current Capability
HVDCP
ISINKC
2.0
mA
Output Voltage Selection
Reference
VSEL_REF
1.8
2
2.2
V
Data Detect Voltage
Data Line Leakage Resistance
D− Pull−Down Resistance
D+ to D− Resistance During
DCP Mode
VDAT_REF
RDAT_LKG
RDM_DWN
RDCP_DAT
0.25
300
14.25
0.325
−
19.53
0.4
1500
24.8
45
V
kW
kW
W
OUTPUT CAPACITOR DISCHARGER
Discharge Comparator OFF
VBUS_REF = 5 V, VDIS(OFF) sensed at VCC pin VDIS(OFF)
5.2
mV
Voltage
VCC Discharge Current
Discharge current of the internal current sink
at the VCC pin
IDIS(VCC)
90 mA
DISCHARGE Pin Maximum Sink
Current
Maximum sink current of the DISCHARGE pin
Minimum recommended external discharge
resistor value connected from VBUS to
DISCHARGE pin is RDIS>=70 W (Class A)
DISCHARGE pin is RDIS>=120 W (Class B)
IDIS(EXT)
150 mA
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.
www.onsemi.com
5
5 Page 
NCP4371
Power Limit
The protocol decoder and the power limit logic will limit
maximum output current to keep regulation within
recommended Vout/Iout operating range. The Power Limit
block adjusts VREFC voltage reference at the current
regulation loop in order to limit the maximum output current.
The NCP4371 is designed to give a user a high degree of
freedom to optimize maximum power and current limit
profile of the target application. The user can scale both –
maximum output power and maximum current limit
independently.
The NCP4371 has two constant power curves defined –
“Option A” for Class A only and “Option B” for either Class
A or Class B. Power Option C shall be used for applications
where constant power regulation is not required. If Power
Option C is selected then power limiting curve is ignored.
The applications based on Power Option C operate in
“constant current regulation mode”.
In order to scale the power limit curve for the given power
a selection of the current sense resistor has to be done. The
relation between current sense resistor and output power
limit is given by the curves in Figure 18.
20
18
16 POUT Limit Option B
14
12
POUT Limit Option A
10
8
6
15 16 17 18 19 20 21 22 23 24 25
P (W)
Figure 18. RSENSE vs. POUT Limit Curve
The characteristics in the Figure 23 cover a range POUT =
15 – 25 W. For powers outside this interval following
formula can be used for RSENSE selection:
Option A (Class A only) :
RSENSE
+
168
Pmax
[mW]
(eq. 1)
Option B (Class A & B) :
RSENSE
+
277
Pmax
[mW]
(eq. 2)
Once the Power limit is defined by an R_SENSE selection
the user needs to define a maximum output current limit.
This current limit can be given by a connector or cable
maximum current rating.
There are 5 current limit options available for Power
Option A and 8 current limit options for Power Option B and
C. Each power limit option corresponds to a particular
Current Control Reference Voltage (VREFC), which limits
the maximum output current for the selected R_SENSE
resistor. The user has to make a selection from current limit
characteristics shown in Figure 19. Each power limit curve
represents a unique device option (see Table Device
Options).
4.0
3.8
3.6
3.4
3.2 E
3.0
2.8 D
2.6
2.4
2.2 C
2.0
1.8
1.6
B
1.4 A
1.2
15 16 17 18 19 20 21 22 23
P (W)
Power Option A Current Limit Selection
24 25
4.4
4.0 H G
3.6 F
3.2 E
2.8
D
2.4
2.0 C
1.6 B
A
1.2
0.8
15 16 17 18 19 20 21 22 23 24 25
P (W)
Power Option B Current Limit Selection
Figure 19. Current Limit Characteristics
www.onsemi.com
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet NCP4371.PDF ] | |
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