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PDF ISL68124 Data sheet ( Hoja de datos )
| Número de pieza | ISL68124 | |
| Descripción | PWM Controller | |
| Fabricantes | Intersil Corporation | |
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DATASHEET
Digital Dual Output, 4-Phase Configurable, PWM
Controller with PMBus
ISL68124
The ISL68124 is a digital dual output, flexible multiphase
(X+Y ≤ 4) PWM controller supporting the latest PMBus 1.3
specifications. Either output can be configured to support any
desired phase assignments up to a maximum of four phases
across the two outputs (X+Y). For example, 3+1, 2+2, 2+1, or
even a single output operation as a 4+0 configuration are
supported. The ISL68124 utilizes Intersil’s proprietary linear
synthetic digital current modulation scheme to achieve the
industry’s best combination of transient response and ease
of tuning while addressing the challenges of modern
multiphase designs.
Device configuration and telemetry monitoring is
accomplished using Intersil's intuitive PowerNavigator™ GUI.
The ISL68124 device supports on-chip nonvolatile memory to
store various configuration settings that are user selectable via
pin-strap, giving system designers increased power density to
configure and deploy multiple configurations. The device
supports an automatic phase add/drop feature to allow
maximum efficiency across all load ranges. Thresholds for
automatic phase add/drop are user programmable using the
powerful PowerNavigator GUI.
The ISL68124 supports a comprehensive fault management
system to enable the design of highly reliable systems. From a
multitiered overcurrent protection scheme, to the configurable
power-good and output overvoltage/undervoltage fault
thresholds and temperature monitoring, virtually any need is
accommodated.
With minimal external components, easy configuration, robust
fault management, and highly accurate regulation capability,
implementing a high-performance, multiphase regulator has
never been easier.
Applications
• Networking equipment
• Telecom/datacom equipment
• Server/storage equipment
• Point-of-load power supply (Memory, DSP, ASIC, FPGA)
Features
• Advanced linear digital modulation scheme
- Zero latency synthetic current control for excellent HF
current balance
- Dual edge modulation for fastest transient response
• Auto phase add/drop for excellent load vs efficiency profile
• PMBus 1.3 support
- Telemetry - VIN, VOUT, IOUT, power IN/OUT, temperature,
and various fault status registers
- Up to 2MHz bus interface
• Flexible phase configuration
- 4+0, 3+1, 2+2 phase operation
- Operation using less than 4 phases between 2 outputs is
also supported
• Diode braking for overshoot reduction
• Differential remote voltage sensing supports ±0.5% closed
loop system accuracy over load, line and temperature
• Highly accurate current sensing for excellent load line
regulation and accurate OCP
- Supports ISL99227 60A smart power stage
- Supports DCR sense with integrated temperature
compensation
• Comprehensive fault management enables high reliability
systems
- Pulse-by-pulse phase current limiting
- Total output current protection
- Output and input OV/UV
- Open voltage sense detect
- Black box recording capability for faults
• Intuitive configuration via PowerNavigator GUI
- NVM to store up to 8 configurations
• Pb-free (RoHS compliant)
Related Literature
• For a full list of related documents, visit our website
- ISL68124 product page
January 27, 2017
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
FN8796.1
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2016, 2017. All Rights Reserved
Intersil (and design) and PowerNavigator are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
Internal Block Diagram
ISL68124
CS0
CSRTN0
CS1
C SR TN 1
CS2
C SR TN 2
CS3
C SR TN 3
ADC
ADC
ADC
ADC
VDROOP
VSE N0
RGND0
VSA
ADC
VDROOP
VSE N1
RGND1
VSA
ADC
VINSEN
TMO N0
TMO N1
VCC
VCCS
LDO
CURREN
T AC FB
PID
CURREN
T AC FB
PID
ADC
C YC LE -
CYCLE OCP
C YC LE -
CYCLE OCP
C YC LE -
CYCLE OCP
C YC LE -
CYCLE OCP
SUMMED
OCP
SUMMED
OCP
OV -
+
-
UV +
OV -
+
-
UV +
FAULT AND
TELEMETRY
MANAGER
STATUS
MANAGER
LOOP
MANAGER
CPU
NVM
BLACKBOX
DIGITAL
DUAL EDGE
MODULATOR
DIGITAL
DUAL EDGE
MODULATOR
PMBus
INTERFACE
FIGURE 1. INTERNAL BLOCK DIAGRAM
PG0
PG1
TWARN
EN0
EN1
CONFIG
SA
PWM0
PWM1
PWM2
PWM3
SCL
SDA
SALRT
Submit Document Feedback
5
FN8796.1
January 27, 2017
5 Page 
ISL68124
Typical Performance Curves
0.08
0.07
0.06
0.05
0.04
0.03
0.05
0.02
0.04
0.03
-40
-20 0
20 40 60
AMBIENT TEMPERATURE (oC)
80
100
FIGURE 5. NOMINAL SUPPLY CURRENT vs TEMPERATURE
Functional Description
Overview
The ISL68124 is a digital dual output, 4-phase PWM controller that
can be programmed for single output 4+0, dual output 3+1, or
2+2 phase operation. Operation using less than four phases
between two outputs is also supported. Existing digital
multiphase solutions utilize analog comparator based schemes
(nonlinear) to bolster the inadequate transient response common
to many digital multiphase solutions. The ISL68124 uses a linear
voltage regulation scheme to address transient loads. As a result,
it is much easier for users to configure and validate their designs
when compared with nonlinear schemes. By combining a
proprietary low noise and zero latency digital current sense
scheme with cutting edge digital design techniques, Intersil is able
to meet transient demands without resorting to nonlinear
schemes. In addition, the ISL68124 can store up to eight user
configurations in NVM and allows the user to select the desired
configuration via pin-strap (CONFIG). The result is a system that is
easy to configure and deploy.
A number of performance enhancing features are supported in
the ISL68124. These include diode braking, automatic phase
dropping, DCR/resistor/smart power stage current sense
support, load-line regulation, and multiple temperature sensing
options.
To facilitate configuration development, the PowerNavigator GUI
provides a step-by-step arrangement for setup and parametric
adjustment. Once a configuration has been set, the user may
employ PowerNavigator to monitor telemetry or use direct
PMBus interface based on the supported command set.
PWM Modulation Scheme
The ISL68124 uses Intersil's proprietary linear synthetic current
modulation scheme to improve transient performance. This is a
unique, constant frequency, dual-edge PWM modulation scheme
with both PWM leading and trailing edges being independently
moved to give the best response to transient loads. Current
balance is an inherent part of the regulation scheme. The
modulation scheme is capable of overlapping pulses should the
0.01
0
-40
-20 0
20 40 60 80
AMBIENT TEMPERATURE (oC)
100
FIGURE 6. SHUTDOWN SUPPLY CURRENT vs TEMPERATURE
load profile demand such operation. In addition, the modulator is
capable of adding or removing pulses from a given cycle in
response to regulation demands while still managing maximum
average frequency to safe levels. For DC load conditions, the
operating frequency is constant.
PMBus Address Selection
When communicating with multiple PMBus devices on a single
bus, each device must have its own unique address so the host
can distinguish between the devices. The device address can be
set using a 1% resistor on the SA pin according to the pin-strap
options listed in Table 2.
TABLE 2. RESISTOR VALUES TO ADDRESS MAPPING
R SA
(Ω)
PMBus
ADDRESS
R SA
(Ω)
PMBus
ADDRESS
0 60h 1500 52h
180 63h 1800 53h
330 66h 2200 56h
470 67h 2700 57h
680 42h 3300 5Ah
820 43h 3900 5Bh
1000 46h 4700 5Eh
1200 47h 5600 5Fh
Phase Configuration
The ISL68124 supports up to two regulated outputs through four
configurable phases. Either output is capable of controlling up to
four phases in any arbitrary mix. Phase assignments are
accomplished via the PowerNavigator GUI.
While the device supports arbitrary phase assignment, it is good
practice to assign phases to Output 1 in descending sequential
numerical order starting from Phase 3. For example, a 3-phase
rail could consist of Phases 3, 2, and 1. For Output 0, phases
should be assigned starting from Phase 0 in ascending
sequential numerical order.
Submit Document Feedback 11
FN8796.1
January 27, 2017
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL68124.PDF ] | |
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