- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384526 > ISL6564ACRZ (INTERSIL CORP) Multiphase PWM Controller with Linear 6-Bit DAC Capable of Precision rDS(ON) or DCR Differential Current Sensing PDF資料下載
參數(shù)資料
| 型號： | ISL6564ACRZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Multiphase PWM Controller with Linear 6-Bit DAC Capable of Precision rDS(ON) or DCR Differential Current Sensing |
| 中文描述： | SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封裝： | 6 X 6 MM, ROHS COMPLIANT, PLASTIC, MO-220, QFN-40 |
| 文件頁數(shù)： | 17/28頁 |
| 文件大?。?/td> | 636K |
| 代理商： | ISL6564ACRZ |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當(dāng)前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
17
FN6285.1
March 20, 2007
Dynamic VID
Modern microprocessors need to make changes to their
core voltage as part of normal operation. They direct the
core-voltage regulator to do this by making changes to the
VID inputs during regulator operation. The power
management solution is required to monitor the DAC inputs
and respond to on-the-fly VID changes in a controlled
manner. Supervising the safe output voltage transition within
the DAC range of the processor without discontinuity or
disruption is a necessary function of the core-voltage
regulator.
The ISL6564A checks the VID inputs at the three edges of
16MHz clock. If the VID code is found to have changed, the
controller waits half of a complete cycle before executing a
12.5mV change. If during the half-cycle wait period, the
difference between DAC level and the new VID code
changes sign, no change is made. If the VID code is more
than 1 bit higher or lower than the DAC (not recommended),
the controller will execute step-up and step down VID
change at a speed of 12.5mV every 4
μ
s until VID and DAC
are equal.
In order to ensure the smooth transition of output voltage
during VID change, a VID step change smoothing network
composed of R
REF
and C
REF
is required for an ISL6564A
based voltage regulator. The selection of R
REF
is based on
the desired offset as detailed above in
Output-Voltage Offset
Programming
. The selection of C
REF
is based on the time
duration for 1 bit VID change and the allowable delay time.
Assuming the microprocessor controls the VID change at 1
bit every T
VID
, the relationship between the time constant of
R
REF
and C
REF
network and T
VID
is given by Equation 12.
Where, T
VID
= 4
μ
s, k is the number of the internal VID
change cycle. If Typically R
REF
is selected to be 1k
Ω
, the
allowable delay time for VR to respond to new VID code is 5
VID change cycles (totally 20
μ
s), the value of C
REF
should
be 22nF based on Equation 12.
Operation Initialization
Prior to converter initialization, proper conditions must exist
on the enable inputs and VCC. When the conditions are met,
the controller begins soft-start. Once the output voltage is
within the proper window of operation, PGOOD asserts
logic 1.
Enable and Disable
While in shutdown mode, the PWM outputs are held in a
high-impedance state to assure the drivers remain off. The
following input conditions must be met before the ISL6564A
is released from shutdown mode.
1. The bias voltage applied at VCC must reach the internal
power-on reset (POR) rising threshold. Once this
threshold is reached, proper operation of all aspects of
the ISL6564A is guaranteed. Hysteresis between the
rising and falling thresholds assure that once enabled,
the ISL6564A will not inadvertently turn off unless the
bias voltage drops substantially (see
Electrical
Specifications
).
DYNAMIC
VID D/A
E/A
VCC
OR
GND
DAC
FB
REF
OFS
VCC
GND
+
-
+
-
0.5V
2.0V
R
OFS
R
REF
ISL6564A
FIGURE 9. OUTPUT VOLTAGE OFFSET PROGRAMMING
WITH ISL6564A
C
REF
R
REF
k T
VID
=
(EQ. 12)
FIGURE 10. POWER SEQUENCING USING THRESHOLD-
SENSITIVE ENABLE (EN) FUNCTION
-
+
1.23V
EXTERNAL CIRCUIT
ISL6564A INTERNAL CIRCUIT
EN
+12V
POR
CIRCUIT
10.7k
Ω
1.40k
Ω
ENABLE
COMPARATOR
SOFT-START
AND
FAULT LOGIC
ENLL
VCC
ISL6564A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6564AIRZ | Multiphase PWM Controller with Linear 6-Bit DAC Capable of Precision rDS(ON) or DCR Differential Current Sensing |
| ISL6566CRR5184 | Three-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications |
| ISL6566CR-TR5184 | Three-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications |
| ISL6566CRZAR5184 | Three-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications |
| ISL6566CRZA-TR5184 | Three-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 |
|---|---|
| ISL6564ACRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6564AIRZ | 功能描述:IC REG CTRLR BUCK PWM VM 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6564AIRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6564CR | 功能描述:IC REG CTRLR BUCK PWM VM 40-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| ISL6564CR-T | 功能描述:IC REG CTRLR BUCK PWM VM 40-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。