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PDF NCP81141 Data sheet ( Hoja de datos )
| Número de pieza | NCP81141 | |
| Descripción | Single-Phase Controller | |
| Fabricantes | ON Semiconductor | |
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NCP81141
Single-Phase Controller
with SVID Interface for
Desktop and Notebook CPU
Applications
The NCP81141 Single−Phase buck solution is optimized for Intel
VR12.6 compatible CPUs. The controller combines true differential
voltage sensing, differential inductor DCR current sensing, input
voltage feed−forward, and adaptive voltage positioning to provide
accurately regulated power for both Desktop and Notebook
applications. The single phase controller uses DCR current sensing
providing the fastest initial response to dynamic load events at reduced
system cost.
The NCP81141 incorporates an internal MOSFET driver for
improved system efficiency. High performance operational error
amplifiers are provided to simplify compensation of the system.
Patented Dynamic Reference Injection further simplifies loop
compensation by eliminating the need to compromise between
closed−loop transient response and Dynamic VID performance.
Patented Total Current Summing provides highly accurate digital
current monitoring.
Features
• Meets Intel™ VR12.6 Specifications
• High Performance Operational Error Amplifier
• Digital Soft Start Ramp
• Dynamic Reference Injection
• “Lossless” DCR Current Sensing
• Adaptive Voltage Positioning (AVP)
• Switching Frequency Range of 250 kHz – 1 MHz
• VIN Range 4.5 V − 25 V
• Startup into Pre−Charged Load While Avoiding False OVP
• Vin Feed Forward Ramp Slope
• Over Voltage Protection (OVP) and Under Voltage Protection (UVP)
• Over Current Protection (OCP)
• VR−RDY Output with Internal Delays
• These Devices are Pb−Free and are RoHS Compliant
Applications
• Desktop and Notebook Processors
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MARKING
DIAGRAM
1
QFN28
CASE 485AR
NCP
81141
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 26 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
January, 2014 − Rev. 1
1
Publication Order Number:
NCP81141/D
1 page  
NCP81141
ENABLE 1
VR_HOT 2
SDIO 3
ALERT 4
SCLK 5
VR_RDY 6
VRMP 7
28 27 26 25 24 23 22
NCP81141
TAB: GROUND
21 ILIM
20 IOUT
19 CSCOMP
18 CSSUM
17 CSREF
16 IMAX
15 PVCC
8 9 10 11 12 13 14
Figure 4. NCP81141 Pin Configurations
NCP81141 SINGLE ROW PIN DESCRIPTIONS
Pin No.
Symbol
Description
1
ENABLE
Logic input. Logic high enables both outputs and logic low disables both outputs
2
VR_HOT#
Thermal logic output for over temperature
3
SDIO
Serial VID data interface
4
ALERT#
Serial VID ALERT#.
5
SCLK
Serial VID clock
6
VR_RDY
Open drain output. High indicates that the output is regulating
7
VRMP
Feed−forward input of Vin for the ramp slope compensation. The current fed into this pin is used
to control the ramp of PWM slope
8 BST High−Side bootstrap supply for phase 1.
9 HG High side gate driver output for phase 1
10 SW Current return for high side gate driver 1
11
PGND
Power Ground for gate driver
12 LG Low−Side gate driver output for phase 1
13
TSENSE
Temp Sense input for the single phase converter
14
VBOOT
An input pin to adjust the boot−up voltage. During start up it is used to program VBOOT with a
resistor to ground
15
PVCC
Power Supply for gate driver, recommended decoupling 2.2 mF
16
IMAX
Imax Input Pin. During start up it is used to program IMAX with a resistor to ground
17
CSREF
Total output current sense amplifier reference voltage input
18
CSSUM
Inverting input of total current sense amplifier
19
CSCOMP
Output of total current sense amplifier
20
IOUT
Total output current monitor.
21 ILIM Over current shutdown threshold setting. Resistor to CSCOMP to set threshold
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5
5 Page 
NCP81141
ELECTRICAL CHARACTERISTICS
Unless otherwise stated: −40°C < TA < 125°C; VCC = 5 V; CVCC = 0.1 mF
Parameter
Test Conditions
HIGH−SIDE MOSFET DRIVER
HG Fall Time
VCC
=
5
V,
3
nF load,
5V
BST−SW
=
DRVH Turn−Off Propagation Delay tpdhDRVH
HG Turn on Propagation Delay tpdlDRVH
SW Pull−Down Resistance
CLOAD = 3 nF
CLOAD = 3 nF
SW to PGND
LG Pull−Down Resistance
HG to SWBST−SW = 0 V
LOW−SIDE MOSFET DRIVER
Pull−up Resistance, Sourcing Current
Low Side Driver Sourcing Current
Pull−down Resistance, Sinking Current
Low Side Driver Sinking Current
LG Rise Time
3 nF load
LG Fall Time
3 nF load
LG Turn−On Propagation
Delay tpdhDRVL
LG Pull−Down Resistance
PVCC Quiescent Current
CLOAD = 3 nF
LG to PGND, VCC = 5 V
EN = L (Shutdown)
EN = H, no switching
BOOTSTRAP RECTIFIER SWITCH
On Resistance
EN_L or EN = H with DRVL = H
3. Guaranteed by design or characterization data, not in production test.
DRVL
tfDRVL
Min
6.0
4.0
15
6.0
6.0
5.0
Typ Max Unit
11 30 ns
30 ns
30 40 ns
1.9 kW
1.9 kW
0.9 3.0 W
5.56 A
0.8 2.0 W
12.5 A
16 30 ns
11 30 ns
11 30 ns
1.9 kW
1.0 mA
490
9.0 22 W
trDRVL
DRVH−SW
tpdhDRVH trDRVH
VTH
tfDRVH
VTH
SW
Figure 5. Driver Timing Diagram
NOTE: Timing is referenced to the 90% and the 10% points, unless otherwise stated.
tpdhDRVL
1V
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| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet NCP81141.PDF ] | |
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