参数资料
| 型号： | ISL6323ACRZ |
| 厂商： | Intersil |
| 文件页数： | 28/36页 |
| 文件大小： | 0K |
| 描述： | IC PWM CTRLR SYNC BUCK DL 48QFN |
| 标准包装： | 43 |
| 应用： | 控制器，AMD SVI |
| 输入电压： | 5 V ~ 12 V |
| 输出数： | 2 |
| 输出电压： | 最高 2V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN（7x7） |
| 包装： | 管件 |
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ISL6323A
power dissipation in the controller itself, P DR , can be roughly
estimated as Equation 30:
3. Calculate the value for the R SET resistor using
Equation 33: (Derived from Equation 20).
400 DCR NB ? K ?
R SET = ---------- ? ------------------------------ ? ? I OCP
?
V IN – V NB V NB ?
2 ? L NB ? f SW V IN ?
P BOOT = ---------------------
P DR = P DR_UP + P DR_LOW + P BOOT + ( I Q ? VCC )
P Qg_Q1
3
(EQ. 30)
3
Where: K = 1
NB
+ ---------------------------------- ? ----------- ?
(EQ. 33)
P DR_UP = ? -------------------------------------- + ---------------------------------------- ? ? ---------------------
? R HI1 + R EXT1 R LO1 + R EXT1 ?
P DR_LOW = ? -------------------------------------- + ---------------------------------------- ? ? ---------------------
? R HI2 + R EXT2 R LO2 + R EXT2 ?
K = ---------- ? R SET ? ------------------------------ ? -----------------------------------------------------------------------------------------------------------
DCR CORE V IN – N ? V CORE V CORE
I OCP
2 ? L CORE ? f SW
? R HI1 R LO1 ? P Qg_Q1
? R HI2 R LO2 ? P Qg_Q2
3
2
4. Using Equation 34 (also derived from Equation 20),
calculate the value of K for the Core regulator.
3 N 100 μ A
400
+ --------------------------------------------- ? --------------------
CORE V IN
(EQ. 34)
R EXT1 = R G1 + -------------
R EXT2 = R G2 + -------------
R GI1
N Q1
R GI2
N Q2
5. Choose a capacitor value for the Core RC filters. A 0.1μF
capacitor is a recommended starting point.
R 2
K = ----------------------------------------------
R 1 + R 2
R 1 ? R 2
-------------------------- = ---------------------------------------------- ? C Core
DCR Core R 1 + R 2
Inductor DCR Current Sensing Component
Selection and R SET Value Calculation
With the single R SET resistor setting the value of the
effective internal sense resistors for both the North Bridge
and Core regulators, it is important to set the R SET value
and the inductor RC filter gain, K, properly. See “Continuous
the R SET resistor and the RC filter gain.
6. Calculate the values for R 1 and R 2 for Core.
Equations 35 and 36 will allow for their computation.
Core (EQ. 35)
Core Core
L Core Core Core (EQ. 36)
Core Core
CASE 2
I Core
? DCR NB > -------------------------- ? DCR Core
There are 3 separate cases to consider when calculating
these component values. If the system under design will
I NB
MAX
MAX
N
(EQ. 37)
never utilize the North Bridge regulator and the ISL6323 will
always be in parallel mode, then follow the instructions for
Case 3 and only calculate values for Core regulator
components.
For all three cases, use the expected VID voltage that would
be used at TDC for Core and North Bridge for the V CORE
and V NB variables, respectively.
CASE 1
In Case 2, the DC voltage across the North Bridge inductor
at full load is greater than the DC voltage across a single
phase of the Core regulator while at full load. Here, the DC
voltage across the North Bridge inductor must be scaled
down to match the DC voltage across the Core inductors,
which will be impressed across the ISEN pins without any
gain. So, the R 2 resistor for the Core inductor RC filters is
left unpopulated and K = 1.
I Core
? DCR NB < -------------------------- ? DCR Core
I NB
MAX
MAX
N
(EQ. 31)
1. Choose a capacitor value for the Core RC filter. A 0.1μF
capacitor is a recommended starting point.
L Core
R 1
DCR Core ? C Core
In Case 1, the DC voltage across the North Bridge inductor
at full load is less than the DC voltage across a single phase
of the Core regulator while at full load. Here, the DC voltage
2. Calculate the value for resistor R 1 :
= ------------------------------------------------
Core
(EQ. 38)
400 DCR CORE ? K ? V IN – V CORE V CORE ?
2 ? L CORE ? f SW
R SET = ---------- ? --------------------------------------- ? ? I OCP + ------------------------------------------- ? -------------------- ?
? V IN ?
across the Core inductors must be scaled down to match the
DC voltage across the North Bridge inductor, which will be
impressed across the ISEN_NB pins without any gain. So,
the R 2 resistor for the North Bridge inductor RC filter is left
unpopulated and K = 1.
3. Calculate the value for the R SET resistor using Equation 39
(Derived from Equation 20).:
3 CORE
1. Choose a capacitor value for the North Bridge RC filter. A
0.1μF capacitor is a recommended starting point.
Where: K = 1
(EQ. 39)
2. Calculate the value for resistor R 1 using Equation 32:
4. Using Equation 40 (also derived from Equation 20),
calculate the value of K for the North bridge regulator.
L NB
DCR NB ? C NB
K = ---------- ? R SET ? --------------------- ? -------------------------------------------------------------------------------
DCR NB V IN – V NB V NB
I OCP
2 ? L NB ? f SW V IN
R 1
NB
= --------------------------------------
(EQ. 32)
400
NB
3 1 100 μ A
+ ---------------------------------- ? -----------
(EQ. 40)
28
FN6878.1
May 12, 2010
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相关代理商/技术参数 |
参数描述 |
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| ISL6323ACRZR5381 | 制造商:Intersil Corporation 功能描述:4+1 PHASE CONT. FOR CORE+NORTHBRIDGE,1 PHASE PSI, 3.4MHZ SVI - Rail/Tube 制造商:Intersil Corporation 功能描述:IC PWM CTRLR SYNC BUCK DL 48QFN |
| ISL6323ACRZ-T | 功能描述:IC PWM CTRLR SYNC BUCK DL 48QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6323ACRZ-TR5381 | 制造商:Intersil Corporation 功能描述:4+1 PHASE CONTROLLER, CORE+NORTHBRIDGE,1 PHASE PSI,3.4MHZ SV - Tape and Reel 制造商:Intersil Corporation 功能描述:IC PWM CTRLR SYNC BUCK DL 48QFN |
| ISL6323ACRZ-TR5453 | 制造商:Intersil Corporation 功能描述:STD. ISL6323ACRZ-T WITH GOLD BOND WIRE ONLY, T&R - Tape and Reel |
| ISL6323AIRZ | 功能描述:IC PWM CTRLR SYNC BUCK DL 48QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
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