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| 型号： | QPO-1LZ |
| 厂商： | Vicor Corporation |
| 文件页数： | 11/17页 |
| 文件大小： | 0K |
| 描述： | 3-30V 10A OUT RIPPLE ATTENUATOR |
| 标准包装： | 20 |
| 系列： | Picor®, QUIETPOWER® |
| 其它名称： | 1102-1084-5 |
PICOR Corporation picorpower.com
QPO-1
Rev 3.6
Page 3 of 17
QPO-1
QUIETPOWER
Product Highlights
Picor’s QPO-1 output ripple attenuator System-in-a-Package
(SiP) provides the user with features that can optimize the
performance of the product to meet their system needs. The
QPO-1 uses active filtering to achieve greater than 30 dB
attenuation of periodic and random deviation (PARD) over
the frequency range of 1 kHz to 500 kHz. For converters
running off-line, with greater low frequency output ripple,
attenuation can be extended to be greater than 20 dB at 50
Hz by connecting a 25 μF capacitor between the VREF and
REFGND pins.
The QPO-1 operates over an output voltage range of 3 to 30
Vdc and is compatible with most switching power supplies
and DC-DC converters. Remote Sense or SC/Trim can be
selected to maintain output voltage regulation at the load.
The SC/Trim feature will adjust the converter output voltage
to compensate the headroom voltage drop of the filter if
remote sense is not available or not preferred. The SC
function works with converters that have a positive reference
type trim adjustment feature.
The QPO-1 can be used in an open loop configuration without
either remote sense or SC/trim. In this mode of operation the
QPO-1 will still provide greater than 30 dB of ripple and noise
attenuation, but DC errors will not be corrected once the
converter and headroom voltages are established, resulting in
reduced load regulation and transient performance.
Figure 4 - QPO-1 Active Filter Block Diagram
The QPO-1’s closed loop architecture greatly improves load
transient response of the converter while ensuring steady-
state precise point of load voltage regulation.
The headroom setting of the QPO-1 filter dramatically
reduces the capacitance needed at the converter output to
provide equivalent
transient
performance and
ripple
reduction. Figure 2 demonstrates how the QPO-1 can be an
ideal solution for noise sensitive applications providing ripple
and noise reduction and improved output regulation with
high transient loads. More information about the QPO-1’s
transient abilities can be found on Picor’s website:
QPO-1 Functional Description
PARD Attenuation:
The QPO-1 uses a closed-loop, active filtering technique to
provide differential attenuation of PARD (Periodic and
Random Deviations), typically associated with a DC to DC
converter’s output voltage.
The active filter provides
attenuation from lower frequencies up to 500 KHz. The lower
frequency range can be extended by adding an external by-
pass cap across the RHR resistor, as shown in Figure 4.
Active attenuation is achieved by using a FET as a variable
resistor that can dynamically change its resistance depending
on the voltage difference between the input voltage and the
QPO-1’s internal reference voltage. When the difference is
lower, the FET’s resistance is reduced, lowering the overall
voltage drop across the QPO-1. When higher, the resistance
is increased, increasing the voltage drop across the QPO-1.
The QPO-1’s output voltage is the same as the voltage that is
on its VREF pin.
Figure 5 - Attenuation Headroom
There is a finite minimum resistance of about 10 mΩ between
QPO IN and QPO OUT that determines the minimum voltage
drop of the QPO-1. At a 10 A load, this would mean a
minimum 100 mV DC drop across QPO-1 without setting any
additional headroom for attenuating ripple. In Figure 5 this
that as the DC headroom voltage gets reduced, the difference
between VIN[DC] and VOUT, the input ripple eventually gets
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相关代理商/技术参数 |
参数描述 |
|---|---|
| QPO-1LZ-01 | 功能描述:IC INTERFACE FILTER RoHS:是 类别:集成电路 (IC) >> 接口 - 滤波器 - 有源 系列:Picor®, QUIETPOWER® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 滤波器类型:连续时间，带通低通 频率 - 截止或中心:150kHz 滤波器数:4 滤波器阶数:8th 电源电压:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) |
| QPO-1Q | 制造商:VICOR 制造商全称:Vicor Corporation 功能描述:Output Ripple Attenuation SiP |
| QPO-2EVAL1 | 制造商:VICOR 制造商全称:Vicor Corporation 功能描述:Evaluation Board for QPO-2 Active Output Filter |
| QPO-2-EVAL1 | 功能描述:EVALUATION BOARD FOR QPO-2 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:Picor®, QUIETPOWER® 标准包装:1 系列:PSoC® 主要目的:电源管理，热管理 嵌入式:- 已用 IC / 零件:- 主要属性:- 次要属性:- 已供物品:板，CD，电源 |
| QPO-2L | 制造商:POWERBOX 制造商全称:Powerbox 功能描述:OUTPUT RIPPLE ATTENUATOR |
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