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PDF NCP81248 Data sheet ( Hoja de datos )

Número de pieza NCP81248
Descripción Three-Rail Controller
Fabricantes ON Semiconductor 
Logotipo ON Semiconductor Logotipo



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No Preview Available ! NCP81248 Hoja de datos, Descripción, Manual

NCP81248
Three-Rail Controller with
Intel Proprietary Interface
for IMVP8 CPU Applications
The NCP81248 contains a two−phase, and two single−phase buck
regulator controllers optimized for Intel IMVP8 compatible CPUs.
www.onsemi.com
The two−phase 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 IMVP8 CPU.
MARKING
DIAGRAM
The two single−phase controllers make use of ON Semiconductor’s
patented high performance RPM operation. RPM control maximizes
transient response while allowing smooth transitions between
discontinuous frequency scaling operation and continuous mode full
power operation. The single−phase rails have a low offset current
1 48
QFN48
CASE 485BA
NCP81248
FAWLYYWW
G
monitor amplifier with programmable offset compensation for high
accuracy current monitoring.
NCP81243 = Specific Device Code
F = Wafer Fab Code
Features Common to All Rails
Vin Range 4.5 V to 25 V
A = Assembly Location
WL = Wafer Lot
YY = Year
Startup into Pre−Charged Loads While Avoiding False OVP
Digital Soft Start Ramp
WW = Work Week
G = Pb−Free Package
Adjustable Vboot (except Rail3)
High Impedance Differential Output Voltage Amplifiers
ORDERING INFORMATION
Dynamic Reference Injection
Device
Package
Shipping
Programmable Output Voltage Slew Rates
Dynamic VID Feed−Forward
Differential Current Sense Amplifiers for Each Phase
Programmable Adaptive Voltage Positioning (AVP)
Switching Frequency Range of 200 kHz –1.2 MHz
NCP81248MNTXG QFN48 2500 / Tape &
(Pb−Free)
Reel
†For information on tape and reel specifications, in-
cluding part orientation and tape sizes, please refer
to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
Digitally Stabilized Switching Frequency
UltraSonic Operation
Single−phase Rail Features
Supports Intel proprietary interface Addresses 00, 01,
02 and 03
Two−phase Rail Features
Supports Intel proprietary interface Addresses 00 and
01
Current Mode Dual Edge Modulation for Fastest Initial
High Performance RPM Control System
Low Offset IOUT Monitor
Zero Droop Capable
Response to Transient Loading
High Performance Operational Error Amplifier
Other Features
PSYS Input Monitor
Accurate Total Summing Current Amplifier
Thermal Monitors for Three Intel proprietary interface
Phase−to−Phase Dynamic Current Balancing
Power Saving Phase Shedding
Addresses
These Devices are Pb−Free, Halogen Free/BFR Free
and are RoHS Compliant
© Semiconductor Components Industries, LLC, 2016
July, 2016 − Rev. 1
1
Publication Order Number:
NCP81248/D

1 page




NCP81248 pdf
NCP81248
FROM SVID
INTERFACE
DAC
DAC
FEED−
FORWARD
DAC FEEDFORWARD
CURRENT
DAC
gm
VSN
VSP
25 VSN_1a
24 VSP_1a
gm
Av=1
26 COMP_1a
DROOP
CURRENT
CURRENT
SENSE AMP
29 CSP_1a
28 CSN_1a
VRMP
FREQ
DRVON
OVP OVP REF
COMP
OVP
PWM
GENERATOR
CURR
OCP
gm
OCP
OVERCURRENT
PROGRAMMING
OVERCURRENT
COMPARATORS
OCP REF
RAMP
gm
DAC
RAMP
GENERATOR
PWM
PS#
ZERO
CURRENT
DETECTION
IOUT
CURRENT
MONITOR
27 ILIM_1a
30 IOUT_1a
22 PWM_1a
Figure 5. Single Phase “a” Block Diagram
FROM SVID
INTERFACE
DAC
DAC
FEED−
FORWARD
DAC FEEDFORWARD
CURRENT
DAC
gm
VSN
VSP
44 VSN_1b
45 VSP_1b
gm
Av=1
43 COMP_1b
DROOP
CURRENT
CURRENT
SENSE AMP
40 CSP_1b
41 CSN_1b
VRMP
FREQ
DRVON
OVP OVP REF
COMP
OVP
PWM
GENERATOR
CURR
OCP
gm
OCP
OVERCURRENT
PROGRAMMING
OVERCURRENT
COMPARATORS
OCP REF
RAMP
gm
DAC
RAMP
GENERATOR
PWM
PS#
ZERO
CURRENT
DETECTION
IOUT
CURRENT
MONITOR
42 ILIM_1b
39 IOUT_1b
36 PWM_1b
Figure 6. Single Phase “b” Block Diagram
www.onsemi.com
5

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NCP81248 arduino
NCP81248
Table 5. ELECTRICAL CHARACTERISTICS – TWO PHASE REGULATOR (VCC = 5.0 V, VEN = 2.0 V, CVCC=0.1 mF unless
specified otherwise) Min/Max values are valid for the temperature range −40°C TA 100°C unless noted otherwise, and are guaranteed
by test, design or statistical correlation.
Parameter
Symbol
Test Conditions
Min Typ Max Unit
OVERCURRENT PROTECTION
ILIM Threshold Current
(delayed OCP shutdown)
ILIM Threshold Current
(immediate OCP shutdown)
Shutdown Delay (immediate)
ICL0
ICL1
ICLM0
ICLM1
9.0 10
11
6.7
13.5 15 16.5
10
300
mA
mA
mA
mA
ns
Shutdown Delay (delayed)
ILIM Offset Voltage
tOCPDLY
VILIM − VCSREF; ILIM sourcing
15 mA
50
−2
ms
2 mV
OUTPUT OVER VOLTAGE & UNDER VOLTAGE PROTECTION (OVP & UVP)
Absolute Over Voltage Threshold
Over Voltage Threshold Above DAC
Over Voltage Delay (Note 7)
Under Voltage
Under−voltage Delay (Note 7)
VOVABS2
VOVP2
VUVM
CSREF voltage during softstart
VVSP – VVSN – VID rising
VVSP – VVSN rising to PWM low
VVSP – VVSN – VID falling
VVSP – VVSN falling to VR_RDY
falling
365
−370
2
25
−295
5
430
−225
V
mV
ns
mV
ms
OSCILLATOR
Switching Frequency Range
200 − 1200 kHz
MODULATORS (PWM Comparators)
0% Duty Cycle
COMP voltage when the PWM 1.3 V
outputs remain LO
100% Duty Cycle
COMP voltage when the PWM
outputs remain HI VRMP = 12.0 V
2.5
V
PWM Phase Angle Error
±15 deg
TSENSE_2ph
Alert# Assert Threshold
25°C to 100°C
488 mV
Alert# De−assert Threshold
25°C to 100°C
510 mV
VRHOT Assert Threshold
25°C to 100°C
469 mV
VRHOT Rising Threshold
25°C to 100°C
489 mV
Bias Current
25°C to 100°C
116 120 124
mA
ICCMAX PIN
Bias Current
IMXBIAS2
Applied only after enabling, and
prior to softstart.
9.63
9.98 10.32
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.
7. Guaranteed by design or characterization data. Not tested in production.
www.onsemi.com
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