參數(shù)資料
型號： ISL6568
廠商： Intersil Corporation
英文描述： Dual Low-Noise Wide-Bandwidth Precision Amplifier 8-SOIC -40 to 85
中文描述： 兩相降壓PWM集成MOSFET驅(qū)動器與控制器，用于VRM9，VRM10，和AMD錘應(yīng)用
文件頁數(shù)： 11/28頁
文件大?。?/td> 716K
代理商： ISL6568
11
FN9187.3
July 25, 2005
depending on the status of the BOOT2 and PHASE2 pins,
as described in the
PWM Operation
section.
The ISL6568 senses the channel load current by sampling
the voltage across the lower MOSFET r
DS(ON)
, as shown in
Figure 5. A ground-referenced operational amplifier, internal
to the ISL6568, is connected to the PHASE node through a
resistor, R
ISEN
. The voltage across R
ISEN
is equivalent to
the voltage drop across the r
DS(ON)
of the lower MOSFET
while it is conducting. The resulting current into the ISEN pin
is proportional to the channel current, I
L
. The ISEN current is
sampled and held as described in the
Current Sampling
section. From Figure 5, the following equation for I
n
is
derived where I
L
is the channel current.
r
)
ISEN
Output Voltage Setting
The ISL6568 uses a digital to analog converter (DAC) to
generate a reference voltage based on the logic signals at the
VID pins. The DAC decodes the 5 or 6-bit logic signals into
one of the discrete voltages shown in Tables 2, 3, and 4.
Each VID pin is pulled up to an internal 1.2V voltage by a
weak current source (40
μ
A current), which decreases to 0 as
the voltage at the VID pin varies from 0 to the internal 1.2V
pull-up voltage. External pull-up resistors or active-high
output stages can augment the pull-up current sources, up to
a voltage of 5V.
.
The ISL6568 accommodates three different DAC ranges:
Intel VRM9.0, AMD Hammer, or Intel VRM10.0. The state of
the VID12.5 pin decides which DAC version is active. Refer
to Table 1 for a description of how to select the desired DAC
version.
TABLE 1. ISL6568 DAC SELECT TABLE
DAC VERSION
VID12.5 PIN CONDITION
VRM10.0
Less then 3V
VRM9.0
50k
resistor to +5V
AMD HAMMER
5k
resistor to +5V
FIGURE 5. ISL6568 INTERNAL AND EXTERNAL CURRENT-
SENSING CIRCUITRY FOR CURRENT BALANCE
I
n
ISEN
IL
(
)
rRISEN
=
-
+
ISEN(n)
R
ISEN
SAMPLE
&
HOLD
ISL6565A INTERNAL CIRCUIT
EXTERNAL CIRCUIT
V
IN
CHANNEL N
UPPER MOSFET
CHANNEL N
LOWER MOSFET
-
+
ILrDS ON
(
)
I
L
I
n
I
L
-R
=
(EQ. 3)
TABLE 2. AMD HAMMER VOLTAGE IDENTIFICATION CODES
VID4
VID3
VID2
VID1
VID0
VDAC
1
1
1
1
1
Off
1
1
1
1
0
0.800
1
1
1
0
1
0.825
1
1
1
0
0
0.850
1
1
0
1
1
0.875
1
1
0
1
0
0.900
1
1
0
0
1
0.925
1
1
0
0
0
0.950
1
0
1
1
1
0.975
1
0
1
1
0
1.000
1
0
1
0
1
1.025
1
0
1
0
0
1.050
1
0
0
1
1
1.075
1
0
0
1
0
1.100
1
0
0
0
1
1.125
1
0
0
0
0
1.150
0
1
1
1
1
1.175
0
1
1
1
0
1.200
0
1
1
0
1
1.225
0
1
1
0
0
1.250
0
1
0
1
1
1.275
0
1
0
1
0
1.300
0
1
0
0
1
1.325
0
1
0
0
0
1.350
0
0
1
1
1
1.375
0
0
1
1
0
1.400
0
0
1
0
1
1.425
0
0
1
0
0
1.450
0
0
0
1
1
1.475
0
0
0
1
0
1.500
0
0
0
0
1
1.525
0
0
0
0
0
1.550
TABLE 3. VRM9 VOLTAGE IDENTIFICATION CODES
VID4
VID3
VID2
VID1
VID0
VDAC
1
1
1
1
1
Off
1
1
1
1
0
1.100
1
1
1
0
1
1.125
ISL6568
相關(guān)PDF資料
PDF描述
ISL6568IR CONNECTOR ACCESSORY
ISL6568IR-T Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications
ISL6568IRZ Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications
ISL6568IRZ-T Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications
ISL6568IRZA Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISL6568CR 功能描述:IC CTRLR PWM BUCK 2PHASE 32-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR)
ISL6568CR-T 功能描述:IC CTRLR PWM BUCK 2PHASE 32-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR)
ISL6568CRZ 制造商:Intersil Corporation 功能描述:CURRENT MODE PWM CNTRLR 0.8375V TO 12V 60A 32QFN EP - Rail/Tube 制造商:Intersil 功能描述:2-PH PWM CNTRLR VRM9 W/2-DRVRS 10 K8 DAC
ISL6568CRZA 制造商:Intersil Corporation 功能描述:CURRENT MODE PWM CNTRLR 0.8375V TO 12V 60A 32QFN EP - Rail/Tube 制造商:Intersil 功能描述:W/ANNEAL 2-PH PWM CNTRLR 2-DRVRS VRM9
ISL6568CRZA-T 制造商:Intersil Corporation 功能描述:CURRENT MODE PWM CNTRLR 0.8375V TO 12V 60A 32QFN EP - Tape and Reel 制造商:Intersil 功能描述:W/ANNEAL 2-PHS PWM CNTRLR W/2-DRVRS
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