Datenblatt-pdf.com


ISL6363 Schematic ( PDF Datasheet ) - Intersil Corporation

Teilenummer ISL6363
Beschreibung Multiphase PWM Regulator
Hersteller Intersil Corporation
Logo Intersil Corporation Logo 




Gesamt 32 Seiten
ISL6363 Datasheet, Funktion
Multiphase PWM Regulator for VR12™ Desktop CPUs
ISL6363
Fully compliant with VR12™ specifications, the ISL6363
provides a complete solution for microprocessor core and
graphics power supplies. It provides two Voltage Regulators
(VRs) with three integrated gate drivers. The first output (VR1)
can be configured as a 4, 3, 2 or 1-phase VR while the second
output (VR2) is a 1-phase VR. The two VRs share a serial control
bus to communicate with the CPU and achieve lower cost and
smaller board areacomparedwith a two-chip approach.
Based on Intersil’s Robust Ripple Regulator R3 Technology™,
the PWM modulator, compared to traditional modulators, has
faster transient settling time, variable switching frequency
during load transients and has improved light load efficiency
with its ability to automatically change switching frequency.
The ISL6363 has several other key features. Both outputs
support DCR current sensing with a single NTC thermistor for
DCR temperature compensation or accurate resistor current
sensing. Both outputs come with remote voltage sensing,
programmable VBOOT voltage, serial bus address, IMAX, TMAX,
adjustable switching frequency, OC protection and separate
power-good indicators. To reduce output capacitors, the
ISL6363 also has an additional compensation function for
PS1/2 mode and high frequency load transient compensation.
Features
• Serial Data Bus (SVID)
•D ual Outputs:
- Configurable 4, 3, 2 or 1-phase for the 1st Output with 2
Integrated Gate Drivers
- 1-phase for the 2nd Output with Integrated Gate Driver
• Precision Core Voltage Regulation
- 0.5% System Accuracy Over-Temperature
- Enhanced Load Line Accuracy
• PS2 Compensation and High Frequency Load Transient
Compensation
• Differential Remote Voltage Sensing
• Lossless Inductor DCR Current Sensing
•P rogrammable VBOOT Voltage at Start-up
• Resistor Programmable Address, IMAX, TMAX for Both
Outputs
• Adaptive Body Diode Conduction Time Reduction
Applications
•V R12 Desktop Computers
Related Literature
• ISL6363EVAL1Z User Guide
VCORE
50mV/DIV
COMP
1V/DIV
2µs/DIV
65A STEP LOAD
1V/DIV
FIGURE 1. FAST TRANSIENT RESPONSE
1.15
1.10
1.05
1.00
0.95
1.7mLOADLINE
1.1V - PS1
1.1V - PS0
0.90
0 5 101 5 20 253 03 5 40 45 50 55 60 65 70 75 80 85
IOUT (A)
FIGURE 2. ACCURATE LOADLINE, VCORE vs IOUT
September 29, 2011
FN6898.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) and R3 Technology are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
http://www.Datasheet4U.com






ISL6363 Datasheet, Funktion
ISL6363
Simplified Application Circuit
+5V
Vin +12V
Rntcg
oC
PGOODG
Rfsetg
Rprog2
VCCSENSEG
VSSSENSEG
Rdroopg
IMONG
SDA
ALERT#
SCLK
Rscomp
Raddr
Rntc
oC
VR_HOT#
PGOOD
VR_ON
Rfset
Rprog1
VCCSENSE
VSSSENSE
Rdroop
IMON
VCC PVCC
NTCG
PGOODG
PVCCG
BOOTG
UGATEG
PHASEG
VWG
LGATEG
COMPG
ISUMPG
ISUMNG
FBG
RTNG
PWM4
IMONG
ISL6363
SDA
ALERT#
SCLK
SCOMP
ADDR
NTC
PWM3
BOOT2
UGATE2
PHASE2
VR_HOT#
PGOOD
VR_ON
VW
LGATE2
BOOT1
UGATE1
PHASE1
COMP
LGATE1
ISUMP
FB
PSICOMP
ISUMN
VSEN
RTN
IMON
ISEN4
ISEN3
ISEN2
GND ISEN1
Rsumg
Cng
Rig
Rng
oC
Vsumng
+12V Cvsumng
VCC
UGATE
PVCC PHASE
ISL6622
PWM
BOOT
LGATE
GND
+12V
VCC
UGATE
PVCC PHASE
ISL6622
PWM
BOOT
LGATE
GND
Vin
+12V
Rsum4
Rsum3
Rn
Cn oC
Rsum2
Rsum1
Ri Vsumn
Cvsumv
Cisen1 Cisen2 Cisen3Cisen4 Risen4
Risen3
Risen2
Risen1
6
LG GX Vcore
L4
L3
L2 CPU Vcore
L1
FN6898.0
September 29, 2011

6 Page









ISL6363 pdf, datenblatt
VW
Vcrm
COMP
Master
Clock
Clock1
PWM1
Clock2
PWM2
Clock3
PWM3
VW
ISL6363
Hysteretic
W in d o w
Vcrm
Master
Clock
Clock1
PWM1
Clock2
PWM2
Clock3
PWM3
VW
COMP
VW
Vcrs2 Vcrs3 Vcrs1
FIGURE 4. R3 MODULA TOR OPERA TION PRINCI PLES IN STEADY
STATE
Since the controller works with Vcrs, which are large-amplitude
and noise-free synthesized signals, it achieves lower phase jitter
than conventional hysteretic mode and fixed PWM mode
controllers. Unlike conventional hysteretic mode converters, the
ISL6363 uses an error amplifier that allows the controller to
maintain a 0.5% output voltage accuracy.
Figure 5 shows the operation principles during load insertion
response. The COMP voltage rises during load insertion,
generating the master clock signal more quickly, so the PWM
pulses turn on earlier, increasing the effective switching frequency,
which allows for higher control loop bandwidth than conventional
fixed frequency PWM controllers. The VW voltage rises as the
COMP voltage rises, making the PWM pulses wider. During load
release response, the COMP voltage falls. It takes the master clock
circuit longer to generate the next master clock signal so the PWM
pulse is held off until needed. The VW voltage falls as the COMP
voltage falls, reducing the current PWM pulse width. This kind of
behavior gives the ISL6363 excellent response speed.
The fact that all the phases share the same VW window voltage
also ensures excellent dynamic current balance among phases.
Vcrs1
Vcrs3
Vcrs2
FIGURE 5. R3 MODULATOR OPERATION PRINCIPLES IN LOAD
INSERTION R ESPONSE
Diode Emulation and Period Stretching of the ISL6363 can
operate in diode emulation (DE) mode to improve light load
efficiency. In DE mode, the low-side MOSFET conducts when the
current is flowing from source to drain and does not allow reverse
current, emulating a diode. As Figure 6 shows, when LGATE is on,
the low-side MOSFET carries current, creating negative voltage on
the phase node due to the voltage drop across the ON-resistance.
The ISL6363 monitors the current through monitoring the phase
node voltage. It turnsoff LGATE when the phase node voltage
reaches zero to prevent the inductor current from reversing the
direction and creating unnecessary power loss.
PHASE
UGATE
LGATE
IL
FIGURE 6. DIODE EMULATION
If the load current is light enough, as Figure 6 shows, the inductor
current will reach and stay at zero before the next phase node
pulse, and the regulator is in discontinuous conduction mode
(DCM). If the load current is heavy enough, the inductor current
will never reach 0A, and the regulator is in CCM although the
controller is in DE mode.
12 FN6898.0
September 29, 2011

12 Page





SeitenGesamt 32 Seiten
PDF Download[ ISL6363 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
ISL6363Multiphase PWM RegulatorIntersil Corporation
Intersil Corporation
ISL6364Dual 4-Phase + 1-Phase PWM ControllerIntersil Corporation
Intersil Corporation
ISL6366Dual 6-Phase + 1-Phase PWM ControllerIntersil Corporation
Intersil Corporation
ISL6367HGreen Hybrid Digital Dual 6-Phase 1-Phase PWM ControllerIntersil Corporation
Intersil Corporation

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche