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参数资料
| 型号： | IRDCIP1001-A |
| 厂商： | International Rectifier |
| 文件页数： | 11/18页 |
| 文件大小： | 0K |
| 描述： | CONV SGL PHA SYNC BUCK 3.3-4.5V |
| 标准包装： | 1 |
| 系列： | iPOWIR™ |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 2V |
| 电流 - 输出： | 20A |
| 输入电压： | 3.3 ~ 4.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 200kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | iP1001 |
| 相关产品： | IP1001TR-ND - IC REG BUCK SYNC ADJ 20A 256BGA IP1001-ND - IC REG BUCK SYNC ADJ 20A 256BGA |
| 其它名称： | *IRDCIP1001-A |
iP1001
DESIGN PROCEDURE
Inductor Selection
The inductor is selected according to the following
expression.
L = V OUT x (1-D) / (fsw x ? I L )
A 470 μ F POSCAP capacitor has a maximum 35m ?
of ESR which provides 9.7kHz zero frequency.
The ESR zero frequency must be set below 12kHz.
This value is calculated assuming the capacitor
datasheet maximum ESR value.
where, D = V
OUT
/V
IN
Example:
V OUT is the output voltage in Volts,
fsw is the switching frequency in kHz,
? I L is the output inductor ripple current.
The inductor value should be selected from 0.8 μ H
to 2.0 μ H range.
Output Capacitor Selection
Use tantalum or POSCAP type capacitors for iP1001.
Selection of the output capacitors depends on
several factors.
? Low effective ESR for ripple and load transient
requirements.
? Stability.
To support the load transients and to stay within a
specified voltage dip ? V due to the transients, ESR
selection should satisfy the following equation:
R ESR ≤ ? V/ ? I
where, ? I is the transient load step
If output voltage ripple is required to be maintained
at specified levels then, the following expression
should be used to select the output capacitors.
R ESR ≤ V p-p / ? I L
where, V p-p is the peak to peak output voltage ripple.
The value of the output capacitor ESR zero frequency
also determines stability. The value of the ESR zero
frequency is calculated by the expression:
R ESR = 1 / (2 π x f ESR x C OUT )
www.irf.com
To determine the amount of capacitance
to meet a 30mVp-p output ripple, with 4A
inductor current ripple requirement.
The calculated ESR will be = 30mV/4A =
7.5m ? . This will require 5 x 470uF POSCAP
capacitors. The total ESR will result in a
9.7kHz zero frequency.
For stable operation:
? Set the resonant frequency f o of the output
inductor and capacitor between 2kHz and 4kHz.
The resonant frequency is calculated using the
following expression:
f o = 1/ (2 π x ( √ LC))
? Select the output inductor value between 0.8 μ H
to 2.0 μ H and the output capacitance between
1880 μ F (4x 470 μ F) and 5600 μ F (12x470 μ F)
? Set the minimum output ripple voltage to be
greater than 0.5% of the output voltage. Select the
capacitor by ESR and by voltage rating rather than
capacitance.
External Input Capacitor Selection
The switching currents impose RMS current
requirements on the input capacitors. The following
expression allows the selection of the input
capacitors, based on the input RMS current:
I RMS = I LOAD x ( √ D x (1-D))
where, D = V OUT /V IN
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IRDCIP1001-B | 功能描述:CONV SGL PHA SYNC BUCK 5-12V RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
| IRDCIP1201-A | 功能描述:电源管理IC开发工具 iP1201 30A 300kHz Dual 15A 3.14V Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRDCIP1202-A | 功能描述:BUCK CONV REF DESIGN KIT IP1202 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:iPOWIR™ 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
| IRDCIP1203-A | 功能描述:电源管理IC开发工具 IP1203 BUCK EVAL BRD 200kHz-400kHz RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRDCIP1206-A | 功能描述:电源管理IC开发工具 IP1206 BUCK EVAL BRD 300kHz RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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