参数资料
| 型号： | ISL6323CRZ |
| 厂商： | Intersil |
| 文件页数： | 28/36页 |
| 文件大小： | 0K |
| 描述： | IC HYBRID CTRLR PWM MONO 48-QFN |
| 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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ISL6323
R 2
K = ----------------------------------------------
R 1 + R 2
I Core
? DCR NB = -------------------------- ? DCR Core
I NB
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
CASE 3
MAX (EQ. 43)
MAX N
In Case 3, the DC voltage across the North Bridge inductor
R 1 ? R 2
-------------------------- = ---------------------------------------------- ? C Core
DCR Core R 1 + R 2
L Core Core Core
Core Core
(EQ. 36)
at full load is equal to the DC voltage across a single phase
of the Core regulator while at full load. Here, the full scale
DC inductor voltages for both North Bridge and Core will be
I NB
I Core
? DCR NB > -------------------------- ? DCR Core
CASE 2
MAX
MAX
N
(EQ. 37)
impressed across the ISEN pins without any gain. So, the R 2
resistors for the Core and North Bridge inductor RC filters
are left unpopulated and K = 1 for both regulators.
For this Case, it is recommended that the overcurrent trip
R 1
DCR NB ? C NB
R 1
DCR Core ? C Core
400 DCR CORE ? K ? V IN – N ? V CORE V CORE ?
2 ? L CORE ? f S
R SET = ---------- ? --------------------------------------- ? ? I OCP + --------------------------------------------- ? -------------------- ?
V IN ?
?
K = ---------- ? R SET ? --------------------- ? --------------------------------------------------------------------------
DCR NB V IN – V NB V NB
I OCP
2 ? L NB ? f S V IN
R 1
DCR Core ? C Core
400 DCR CORE ? K ? V IN – N ? V CORE V CORE ?
R SET = ---------- ? --------------------------------------- ? ? I OCP + --------------------------------------------- ? -------------------- ?
2 ? L CORE ? f S V IN ?
?
Where: K = 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.
1. Choose a capacitor value for the Core RC filter. A 0.1μF
capacitor is a recommended starting point.
2. Calculate the value for resistor R 1 :
L Core (EQ. 38)
= ------------------------------------------------
Core
3. Calculate the value for the R SET resistor using Equation 39:
3 CORE
Where: K = 1 (EQ. 39)
(Derived from Equation 20).
4. Using Equation 40 (also derived from Equation 20),
calculate the value of K for the North bridge regulator.
3 1 100 μ A
400
+ ----------------------------- ? -----------
NB
point for the North Bridge regulator be equal to the
overcurrent trip point for the Core regulator divided by the
number of core phases.
1. Choose a capacitor value for the North Bridge RC filter. A
0.1μF capacitor is a recommended starting point.
2. Calculate the value for the North Bridge resistor R 1 :
L NB (EQ. 44)
= --------------------------------------
NB
3. Choose a capacitor value for the Core RC filter. A 0.1μF
capacitor is a recommended starting point.
4. Calculate the value for the Core resistor R 1 :
L Core (EQ. 45)
= ------------------------------------------------
Core
5. Calculate the value for the R SET resistor using Equation 46:
3 CORE
(EQ. 46)
6. Calculate the OCP trip point for the North Bridge
regulator using equation 47. If the OCP trip point is higher
than desired, then the component values must be
recalculated utilizing Case 1. If the OCP trip point is lower
than desired, then the component values must be
recalculated utilizing Case 2.
= 100 μ A ? --------------------- ? ? ---------- ? R SET ? + ----------------------------- ? -----------
DCR NB ? 400
2 ? L NB ? f S V IN
(EQ. 40)
5. Choose a capacitor value for the North Bridge RC filter. A
0.1μF capacitor is a recommended starting point.
I OCP
NB
?
1 3 V IN – V NB V NB
(EQ. 47)
R 2
K = -------------------------------------
R 1 + R 2
R 1 ? R 2
--------------------- = ------------------------------------- ? C NB
DCR NB R 1 + R 2
6. Calculate the values for R 1 and R 2 for North Bridge.
Equations 41 and 42 will allow for their computation.
NB (EQ. 41)
NB NB
L NB NB NB (EQ. 42)
NB NB
28
NOTE: The values of R SET must be greater than 20k Ω and
less than 80k Ω . For all of the 3 previous cases, if the
calculated value of R SET is less than 20k Ω , then either the
OCP trip point needs to be increased or the inductor must be
changed to an inductor with higher DCR. If the R SET resistor
is greater than 80k Ω , then a value of R SET that is less than
80k Ω must be chosen and a resistor divider across both
North Bridge and Core inductors must be set up with proper
gain. This gain will represent the variable “K” in all equations.
It is also very important that the R SET resistor be tied
between the RSET pin and the VCC pin of the ISL6323.
FN9278.5
May 17, 2011
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| ISL6323CRZR5285 | 制造商:Intersil Corporation 功能描述: |
| ISL6323CRZ-T | 功能描述:IC HYBRID CTRLR PWM MONO 48-QFN 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 |
| ISL6323EVAL1Z | 功能描述:EVAL BOARD 1 FOR ISL6323 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6323IRZ | 功能描述:IC HYBRID CTRLR PWM MONO 48-QFN 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 |
| ISL6323IRZ-T | 功能描述:IC HYBRID CTRLR PWM MONO 48-QFN 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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