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IR3088APBF の電気的特性と機能

IR3088APBFのメーカーはInternational Rectifierです、この部品の機能は「XPHASETM PHASE IC」です。


製品の詳細 ( Datasheet PDF )

部品番号 IR3088APBF
部品説明 XPHASETM PHASE IC
メーカ International Rectifier
ロゴ International Rectifier ロゴ 




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IR3088APBF Datasheet, IR3088APBF PDF,ピン配置, 機能
DATA SHEET No.94704
IR3088APbF
XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT
DESCRIPTION
The IR3088APbF Phase IC combined with an IR XPhaseTM Control IC provides a full featured and flexible
way to implement power solutions for the latest high performance CPUs and ASICs. The “Control” IC
provides overall system control and interfaces with any number of “Phase” ICs which each drive and monitor
a single phase of a multiphase converter. The XPhaseTM architecture results in a power supply that is
smaller, less expensive, and easier to design while providing higher efficiency than conventional
approaches.
www.DataSheet4U.com
The IR3088APbF is intended for the following application conditions;
Excessive impedance between converter and load
Output voltage exceeding the control IC reference/VID voltage is desired
FEATURES
2.5A Average Gate Drive Current
Loss-Less Inductor Current Sense
Internal Inductor DCR Temperature Compensation
Programmable Phase Delay
Programmable Feed-Forward Voltage Mode PWM Ramp
Sub 100ns Minimum Pulse Width supports 1MHz per-phase operation
Current Sense Amplifier drives a single wire Average Current Share Bus
Current Share Amplifier reduces PWM Ramp slope to ensure sharing between phases
Body BrakingTM disables Synchronous MOSFET for improved transient response and prevents negative
output voltage at converter turn-off
Phase Fault Detection
Programmable Phase Over-Temperature Detection
Control FET driver’s 25V input voltage capability simplifies boot-strap supply design
Small thermally enhanced 20L MLPQ package
PACKAGE PINOUT
1 RMPIN+
2 RMPIN-
3 HOTSET
4 VRHOT
5 ISHARE
IR3088A
PHASE
IC
VCCH
GATEH
PGND
GATEL
VCCL
15
14
13
12
11
Page 1 of 34
1/28/2005

1 Page





IR3088APBF pdf, ピン配列
IR3088APbF
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over: 8.4V
14V, 0 oC TJ 125 oC, CGATEH = 3.3nF, CGATEL = 6.8nF
VCC
14V, 6V
VCCH
25V,
6V
VCCL
PARAMETER
Gate Drivers
GATEH Rise Time
www.DataSheet4U.comGATEH Fall Time
GATEL Rise Time
GATEL Fall Time
GATEL low to GATEH high
delay
GATEH low to GATEL high
delay
Disable Pull-Down Current
Current Sense Amplifier
CSIN+ Bias Current
CSIN- Bias Current
Input Offset Voltage
Gain at TJ = 25 oC
Gain at TJ = 125 oC
Slew Rate
Differential Input Range
Common Mode Input Range
Rout at TJ = 25 oC
Rout at TJ = 125 oC
Ramp Discharge Clamp
Clamp Voltage
Clamp Discharge Current
TEST CONDITION
MIN TYP MAX UNIT
VCCH = 12V, Measure 2V to 9V
transition time
22 50 ns
VCCH = 12V, Measure 9V to 2V
transition time
22 50 ns
VCCL = 12V, Measure 2V to 9V
transition time
50 75 ns
VCCL = 12V, Measure 9V to 2V
transition time
50 75 ns
VCCH = VCCL = 12V, Measure the time 10 25 50 ns
from GATEL falling to 1V to GATEH
rising to 1V
VCCH = VCCL = 12V, Measure the time 10 25 50 ns
from GATEH falling to 1V to GATEL
rising to 1V
Force GATEH or GATEL = 2V with
BIASIN = 0V
15 25 40 µA
CSIN+ = CSIN- = DACIN. Measure
input referred offset from DACIN
Current Sense Amplifier output is an
internal node. Slew rate at the ISHARE
pin will be set by the internal 10k
resistor and any stray external
capacitance
-0.5 -0.25
-0.5 -0.25
-3 0.5
0
0
5
µA
µA
mV
32 34 36 V/V
27 29 31 V/V
12.5
V/µs
-20 100 mV
0 4V
7.9 10.5 13.1 k
9.3 12.4 15.5 k
Force I(PWMRMP) = 500µA. Measure
V(PWMRMP) – V(DACIN)
-10
4
5
8
20 mV
mA
Page 3 of 34
1/28/2005


3Pages


IR3088APBF 電子部品, 半導体
IR3088APbF
SYSTEM THEORY OF OPERATION
XPhaseTM Architecture
The XPhaseTM architecture is designed for multiphase interleaved buck converters which are used in applications
requiring small size, design flexibility, low voltage, high current and fast transient response. The architecture can
control converters of any phase number where flexibility facilitates the design trade-off of multiphase converters. The
scalable architecture can be applied to other applications which require high current or multiple output voltages.
As shown in Figure 1, the XPhaseTM architecture consists of a Control IC and a scalable array of phase converters
www.DataSheeet4aUc.hcomusing a single Phase IC. The Control IC communicates with the Phase ICs through a 5-wire analog bus, i.e.
bias voltage, phase timing, average current, error amplifier output, and VID voltage. The Control IC incorporates all
the system functions, i.e. VID, PWM ramp oscillator, error amplifier, bias voltage, and fault protections etc. The
Phase IC implements the functions required by the converter of each phase, i.e. the gate drivers, PWM comparator
and latch, over-voltage protection, and current sensing and sharing.
There is no unused or redundant silicon with the XPhaseTM architecture compared to others such as a 4 phase
controller that can be configured for 2, 3, or 4 phase operation. PCB Layout is easier since the 5 wire bus eliminates
the need for point-to-point wiring between the Control IC and each Phase. The critical gate drive and current sense
connections are short and local to the Phase ICs. This improves the PCB layout by lowering the parasitic inductance
of the gate drive circuits and reducing the noise of the current sense signal.
POWER GOOD
PHASE FAULT
VR HOT
12V
ENABLE
VID5
VID0
VID1
VID2
VID3
VID4
IR3081
CONTROL
IC
>> BIAS VOLTAGE
>> PHASE TIMING
<< CURRENT SENSE
>> PWM CONTROL
>> VID VOLTAGE
PHASE FAULT
CURRENT SHARE
IR3088A
PHASE IC
PHASE HOT
0.1uF
CCS RCS
CIN
COUT
VOUT SENSE+
VOUT+
VOUT-
VOUT SENSE-
PHASE FAULT
CURRENT SHARE
IR3088 A
PHASE IC
PHASE HOT
0.1uF
CCS RCS
Page 6 of 34
CONTROL BUS
ADDITIONAL PHASES
INPUT/OUTPUT
Figure 1. System Block Diagram
1/28/2005

6 Page



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部品番号部品説明メーカ
IR3088APBF

XPHASETM PHASE IC

International Rectifier
International Rectifier


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