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參數(shù)資料
| 型號： | QPO-2L |
| 廠商： | Vicor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | QPO-2L Low Voltage Output Ripple Attenuator |
| 中文描述： | QPO - 2公升低電壓輸出紋波衰減 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 290K |
| 代理商： | QPO-2L |
Picor Corporation www.picorpower.com
QPO-2L Data Sheet Rev. 1.1 Page 1 of 12
Description
The QPO-2 output ripple attenuator SiP uses active
filtering to reduce supply output ripple and noise
(PARD) by over 30dB from 1kHz to 500kHz. The
QPO-2 is biased through the VAUX input and filters
an input voltage range of 0.3VDC to 5.5VDC while
supporting load currents as high as 20A. The VAUX
input range is 7V to 12V with a minimum required
difference between VAUX and QPO OUT of 7V.
Output regulation is maintained by using either the
remote sense or the trim adjustment of the power
supply. The product can be used in an open loop
configuration when ripple and noise reduction are
the main objective and load regulation is not as
critical. The QPO-2 architecture improves transient
response and ensures quiet point-of-load regulation
when used with most switching power supplies. The
performance waveform in figure 2 is an example of
the
ripple
reduction
and
transient
load
improvement the QPO-2 can provide using a 3.3V
brick style converter.
Applications
Distributed Point of Load Power Systems
Sensors Requiring Low Noise Power
Medical Instrumentation
Note 1: For off-line supplies 20dB attenuation can be achieved
down to 50Hz with additional capacitance added from the VREF
pin to REFGND.
Features of the QPO-2
>30 dB PARD attenuation, 1kHz to 500kHz
>20 dB PARD attenuation, 50Hz to 500Hz (1)
20A rating over a 0.3-5.5Vdc operating range
Supports precise point-of load regulation
90-95% efficiency with load vs. headroom trim
User selectable performance optimization of the
attenuation, power dissipation & transient load
response
Peak detector function optimizes headroom for
ripple amplitude variation automatically
25 x 25 x 4.5 mm SiP with LGA mounting
Closed loop control improves transient response
of most DC/DC converters and power supplies
Reduces required number of output capacitors to
support dynamic loads.
Patents Pending
Typical Application
QPO-2 Performance
RHR
SC SET
QPO OUT
SLOPE
ADJ
GND
ADJUST
QPO IN
REFGND
QPO-2L
CSC
CIN*
*Optional
PEAK IN
RCLAMP
VAUX
Rsc
VREF
RSA
VOUT+
VOUT-
SENSE+
SENSE-
+TRIM
LOAD+
LOAD-
RSL
RCP
VAUX
Figure 1 – ADJUST/Trim supports applications that don’t
require remote sense.
Figure 2 – Typical performance with a 3.3 Volt converter,
showing 1 to 10 A load step.
QPO IN (AC)
QPO OUT (AC)
LOAD CURRENT
QPO-2L
QuietPower
QPO-2L Low Voltage Output Ripple Attenuator
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