參數資料
型號： ISL6568IRZA
廠商： INTERSIL CORP
元件分類： 穩(wěn)壓器
英文描述： Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications
中文描述： SWITCHING CONTROLLER, 275 kHz SWITCHING FREQ-MAX, PQCC32
封裝： 5 X 5 MM, ROHS COMPLIANT, PLASTIC, MO-220-VHHD, QFN-32
文件頁數： 11/28頁
文件大?。?/td> 716K
代理商： ISL6568IRZA
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PDF資料
PDF描述
ISL6568IRZA-T Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications
ISL6568CRZA-T VP Fixed Series, 500 Ohms, 50.0 W, Fixed, Wirewound Resistor
ISL6568CR-T Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications
ISL6569A Multi-Phase PWM Controller
ISL6569ACR Multi-Phase PWM Controller
相關代理商/技術參數
參數描述
ISL6568IRZA-T 功能描述:IC CTRLR PWM BUCK 2PHASE 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數:1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件
ISL6568IRZR5184 功能描述:IC CTRLR PWM 2PHASE BUCK 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數:1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件
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ISL6568IRZ-TR5184 功能描述:IC CTRLR PWM 2PHASE BUCK 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數:1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件
ISL6569ACB 功能描述:IC REG CTRLR BUCK PWM 24-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產品目錄頁面:1316 (CN2011-ZH PDF)
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