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參數(shù)資料
| 型號： | QPO-2LZ-01 |
| 廠商： | Vicor Corporation |
| 文件頁數(shù)： | 1/11頁 |
| 文件大小： | 0K |
| 描述： | IC INTERFACE FILTER |
| 標(biāo)準(zhǔn)包裝： | 20 |
| 系列： | Picor®, QUIETPOWER® |
| 其它名稱： | 1102-1094-5 |
Picor Corporation www.picorpower.com
QPO-2 Data Sheet Rev. 1.6 Page 1 of 11
Description
The QPO-2 output ripple attenuator SiP uses active
filtering to reduce supply output ripple and noise (PARD)
by over 30 dB from 1 kHz to 500 kHz. The QPO-2 is biased
through the VAUX input and filters an input voltage
range of 0.3 Vdc to 5.5 Vdc while supporting load currents
as high as 20 A. The VAUX input range is 7 V to 12 V with
a minimum required difference between VAUX and QPO
OUT of 7 V. 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 20 dB attenuation can be achieved
down to 50 Hz with additional capacitance added from the VREF
pin to REFGND.
Features of the QPO-2
>30 dB PARD attenuation, 1 kHz to 500 kHz
>20 dB PARD attenuation, 50 Hz to 500 Hz (1)
20 A rating over a 0.3-5.5 Vdc 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 (System-in-a-Package)
Low profile LGA package
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
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-2
QUIETPOWER
QPO-2 Low Voltage Output Ripple Attenuator
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