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PDF QPO-1L Data sheet ( Hoja de datos )

Número de pieza QPO-1L
Descripción Output Ripple Attenuation SiP
Fabricantes Vicor Corporation 
Logotipo Vicor Corporation Logotipo



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Features
• >20dB PARD attenuation from
50Hz to 500kHz
• Supports point of load regulation
• Peak ripple detector optimizes
performance automatically
• Significantly improves load
transient response
• Efficiency up to 98%
• User selectable performance
optimization
• 3-30Vdc operating range
• 10A rating
PRELIMINARY
Data Sheet
QuietPowerTM
Output Ripple Attenuation SiP
Patents Pending
Shown actual size:
1.0 x 1.0 x 0.2 in
25 x 25 x 5 mm
Product Highlights
Absolute Maximum Ratings
Exceeding these parameters may result in permanent damage to the product
Picor’s QPO-1 output ripple attenuator
System-in-a-Package (SiP) provides active
filtering to achieve greater than 20 dB
attenuation of periodic and random deviation
(PARD) over the frequency range of
50Hz to 500kHz.
The QPO-1 operates over a voltage range
of 3 to 30Vdc and is compatible with most
switching power supplies and converters.
The load is regulated by using remote
sensing or a reference type trim adjustment
feature as is commonly found on most
power supplies.
Parameter
+In to –In
+In to –In
Load current
Maximum power dissipation
Operating temperature
Package thermal resistance
Package thermal resistance
Storage temperature
Part Numbering
The QPO-1’s closed loop architecture
greatly improves load transient response
while ensuring steady-state precise point of
load voltage regulation. The QPO-1 is
available in surface mountable Land Grid
and Ball Grid Array terminations.
QPO
Rating
33
40
15
4
-20 to +85
50
TBD
-40 to +125
Unit
Vdc
Vdc
A
W
°C
°C/W
°C/W
°C
-1L
L = Land Grid Array
B = Ball Grid Array
Notes
Continuous
100ms
Continuous
Ambient
Free Air
Optimum heat sinking
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
Set your site on PICOR at www.picorpower.com
Page 1 of 8

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QPO-1L pdf
Module
+ OUT
QPOIN
1k
PEAKIN
0.1µF
PRELIMINARY
The slope adjust feature can be set to zero providing relative
constant headroom versus load using an RSA of 100k. The user
can optimize performance based on the expected variation in load
current and the desired power dissipation range. The formula
below should be used to calculate the RSA value for the desired
headroom versus current slope. If the peak detector is enabled,
the peak of the ripple will be added back to the headroom at a
given load condition.
RSA = ((I*0.05)/V) *2500
Example: For a 5A maximum load and a 150mV
reduction in headroom.
RSA =((5A*0.05/0.15V)*2500= 4.167k
Figure 8 – Peak detector Disable Circuit
0
-10
-20
dB
-30
3.3V 15V 28V
69.8k 324k 602k
QPO-1 Attenuation vs. Power
Iload=10A
1% Rhr std. values for VOUT=3.3V 15V 28V
Rss=100k (delta Vhr = 0mV from 0.1 to 10A)
47.5k 215k 402k
-40 39.2k 178k 332k
-50
500kHz
50Hz
-60
1
30.1k 137k 255k
24.9k 113k 210k
21k 95.3k 178k
23
Watts
Figure 9 – Power vs Attenuation without slope
4
0
Peak Detector Function
This feature dynamically adds to the headroom voltage to
accommodate converter ripple variation. This feature can be
enabled by connecting the PEAKIN pin to the QPOIN pin and
disabled by putting a small RC filter at the PEAKIN pin as shown
in Figure 8.
The active loop performance has been optimized for 45 degrees
of phase margin over the expected load range. CCO shown in Figs
1 and 2 must be a low ESR ceramic capacitor. Loading the
QPO-1 directly with low ESR ceramic capacitance will affect the
phase margin and is not recommended. The distributed load
capacitance and inductance of the load path will vary depending
on the application. The effects of a distributed load impedance
on phase margin when very low ESR load capacitance is present
will typically be mitigated by the distributed inductance of the
load path. The transient load response in Figure 4 was measured
with approximately 10nH of distributed inductance between
QPO-1 output and the load board which had a 15µF low ESR
ceramic capacitor across the static load resistance.
The following is a summary of the optional configurations that a
user can select for the QPO-1.
-10
3.3V 15V 28V
27.4k 124k 232k
-20
QPO-1 Attenuation vs. Power
Iload=10A
1% Rhr std. values for VOUT=3.3V 15V 28V
Rss=7.1k (delta Vhr =150mV from 0.1 to 10A)
-30
dB
-40
24.9k 113k 210k
22.6k 102k 191k
-50
-60
1
500kHz
50Hz
21k 95.3k 178k
18.2k 82.5k 154k
16.5k 75k 140k
14.3k 64.9k 121k
23
Watt
4
Figure 10 – Power vs Attenuation with slope adjust
• No slope adjust, no peak detect:
fixed headroom over ripple amplitude and current.
• Same as above, but with peak detect enabled:
peak of ripple amplitude is added to the headroom voltage
optimizing headroom with varying ripple amplitude.
• No peak detection with slope adjust:
to improve transient load range and efficiency trading off
attenuation at high current.
• Using both peak detection and slope adjust:
to accommodate ripple amplitude variation with increased
transient capability and efficiency.
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
Set your site on PICOR at www.picorpower.com
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