QPO-1Q [VICOR]
Output Ripple Attenuation SiP; 输出纹波衰减的SiP
| 型号： | QPO-1Q |
| 厂家： | 
VICOR CORPORATION |
| 描述： | Output Ripple Attenuation SiP |
| 文件： | 总8页 (文件大小：144K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PRELIMINARY
Data Sheet
TM
QuietPower
Output Ripple Attenuation SiP
Features
• >20dB PARD attenuation from
50Hz to 500kHz
Patents Pending
• Supports point of load regulation
• Peak ripple detector optimizes
performance automatically
• Significantly improves load
transient response
• Efficiency up to 98%
• User selectable performance
optimization
Shown actual size:
1.0 x 1.0 x 0.2 in
25 x 25 x 5 mm
• 3-30Vdc operating range
• 10A rating
Absolute Maximum Ratings
Exceeding these parameters may result in permanent damage to the product
Product Highlights
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.
Parameter
Rating
Unit
Notes
+In to –In
33
Vdc
Continuous
+In to –In
40
Vdc
A
100ms
Load current
15
4
Continuous
Maximum power dissipation
Operating temperature
W
-20 to +85
°C
Ambient
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.
Package thermal resistance
Package thermal resistance
Storage temperature
50
TBD
°C/W
°C/W
°C
Free Air
Optimum heat sinking
-40 to +125
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.
Q P O - 1 L
L = Land Grid Array
B = Ball Grid Array
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
Page 1 of 8
Set your site on PICOR at www.picorpower.com
PRELIMINARY
Electrical Characteristics
Electrical characteristics apply over the full operating range of input voltage, output power and PCB substrate temperature, unless
otherwise specified. All temperatures refer to the operating temperature at the interface of the PCB surface with proper reflow mounting of
QPO-1. The PCB surface must have sufficient area and heat via’s to the opposite side to achieve the optimum thermal resistance.
QPO-1 SiP SPECIFICATIONS (-20°C to +100°C PCB Substrate temperature)
Parameter
Min
Max
Unit
Notes
Operating current range
0.03
10
A
There is no internal current limiting. The system must
be properly fused such that the current does not exceed
the absolute maximum rating of 15A. A minimum
current of 30mA is needed to maintain regulation.
Operating input voltage
Transient output response
@ 2A step
3.0
30
Vdc
Continuous
Step load change rates <1A/µs
50
50
mVp-p
mVp-p
mV
VHR=375mV @ 100mA, Input capacitance = 200µF
@ 10A step
VHR=375mV @ 100mA, Input capacitance = 1500µF
VHR headroom voltage range(1)
225
525
@ 100mA load with 100mVp-p ripple.
See Table 1 for headroom setting RHR resistor values.
QPOOUT +VHR must be set below converter over voltage trip.
Output noise
10
5
mVp-p
mVrms
Input PARD = 100mVp-p, 50Hz-500kHz
SC output current accuracy(2)
±1
%
See Note 2 and Figure 2 for setting R value
SS
ISC=VHR / RSS
QPO-1 bias current
Power dissipation
60
mA
W
4.0
QPOOUT = 28V; Iout = 10A
VHR = 375mV @ 100mA
(without slope adjust or peak detection.)
(1) Headroom voltage, peak detection and slope adjustment must be chosen by the user based on attenuation and efficiency requirements.
The functional description section explains how to optimize the configuration of the QPO-1 for the voltage source used. The headroom
voltage is the difference between the input and the output of the QPO-1 and is set by the selection of resistor RHR
.
Calculate RHR as shown.
RHR = (QPOOUT / VHR) x 2.5k (see Table 1 for example values)
(2)
R
SS
resistor sets the correction current required to trim the source output up to accommodate the headroom of the QPO-1 when remote
sense is not used. This function will accommodate power supplies with positive reference based trim configuration.
RSS = RIN * VOUT / VRPT ( If a converter is trimmed down use the resulting VOUT voltage in the formula for RSS
)
Where:
RIN = input resistance of the SC or Trim pin;
VOUT = source output voltage;
VRPT = SC or Trim pin pre-trimmed reference
QPO-1 Output
RHR Value (ohms)
3.0V
5.0V
20k
33.3k
80k
12.0V
15.0V
24.0V
28.0V
100k
160k
187k
Table 1—RHR computed values for VHR = 375mV @100mA.
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
Page 2 of 8
Set your site on VICOR at www.vicorpower.com
PRELIMINARY
Application Notes
Functional Description
Rps
10Ω 1W
The QPO-1 is an active power filter that provides attenuation
of power supply output PARD. The measured attenuation
performance over frequency is shown in Figure 3 at output
voltage conditions of 3.3 and 28 Vdc. The user can select
and optimize the attenuation versus power dissipation by
setting the headroom voltage of the active loop.
Qp*
18
17
{
Module
+ OUT
10
11
12
13
14
15
9
QPOIN
QPOOUT
8
{
7
+ Sense
PEAKIN
6
5
Cps*
QPO-1 SC SET
16
19
SC
Trim
CESR
IN*
CSC
*
GND
Cco
15uF
– Sense
Module
– OUT
The conditions in Figure 3 were measured with a low current
headroom setting of 375mV with approximately 100mV
peak-to-peak ripple voltage on the input to the QPO-1. The
remote sense circuit configuration was used as shown in
Figure 1 with the peak detector function enabled. Some
power supplies need to sense the output ripple for proper
operation. Cps couples the unfiltered ripple back to the sense
input while Rps provides the DC feedback to the power
supply from the load.
20
1
2
3
4
+
–
RSA
RHR
Load
*Optional Component
See Description
4.7uF**
20k**
**Required only for
engineering samples
Figure 1—Typical Configuration using Remote Sensing
Typical improvement in output noise and transient
performance with a 3.3V converter is shown in Figure 4.
This measured data demonstrates the reduction in noise and
ripple at the output of the QPO-1 versus the source output as
well as the transient capability stepping from 1 to 10A
load current - the maximum current rating. This particular
converter has sufficient output capacitance and response
time to load changes such that no additional capacitance,CIN,
is needed on the input of the QPO-1 to reach a 10A level and
still maintain the output within ±50mV.
RSS
18
{
17
Module
+ OUT
11
12
13
14
15
10
QPOIN
QPOOUT
9
8
{
7
PEAKIN
6
5
QPO-1
SC SET
CESR
16
19
SC
Trim
Cco
+
CSC
*
15uF
GND
–
Load
IN*
20
1
2
3
4
Module
– OUT
RSA
RHR
*Optional Component
See Description
4.7uF**
20k**
**Required only for
engineering samples
Figure 2—Typical Configuration using Trim Control
0
-10
-20
-30
-40
-50
-60
-70
28V 10A
3.3V 10A
Figure 4 – Transient Response using a Vicor
3.3V Half Brick Converter
Ch1: QPOIN
Ch4: QPOOUT
Ch3: Load Current – 10A peak, pulse width = 400µS
1.00E+02
1.00E+03
1.00E+04
1.00E+05
1.00E+06
Load Current Static = 1A
Frequency (Hz)
Load Current Transient = 9A
Headroom Voltage @ 100mA = 400mV
Figure 3— Attenuation vs. Frequency
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
Page 3 of 8
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PRELIMINARY
The product can be used with voltage sources from 3 to 30Vdc
Vout = 3.3V, ILOAD = 10A
by using either the remote sense or the voltage trim feature.
The two different circuit schematics are shown in Figures 1 and
2. For either configuration, the source output will increase to
accommodate the headroom setting of the QPO-1 filter to
maintain the load voltage at the required level.
0
VHR=103mV
VHR=134mV
dB
1.
VHR=167mV
VHR=203mV
The user can optimize performance by setting the low current
(100mA) headroom operating point per Table 1 or by using the
formulas in Notes 1 and 2 above the table. The user must be
aware of the sources over-voltage set-point and not create a
headroom voltage that will cause a shutdown condition. For this
reason it is recommended that the QPO-1 be used with power
supplies running at their factory preset voltages or in a trimmed
down configuration.
-
5 0
VHR=256mV
VHR=300mV
-
1
0
0
10Hz
100Hz
1. 0kHz
10kHz
100kHz
1. 0MHz
Frequency
In low voltage applications (<12V), it may be required to use the
CSC capacitor. This creates a soft starting of the source
Figure 5 – Attenuation vs Frequency @ 3.3 volts
preventing the output from tripping the over voltage function
while the QPO-1 output line comes up to the set-point. The CSC
value will be converter dependent but is typically around 5 to
22µF. Remote sensing may also require Qp for start up, use a
logic level low voltage PFET such as IRLML6401 or equivalent.
Vout = 15V, ILOAD = 10A
0
VHR=103mV
VHR=134mV
VHR=167mV
dB
VHR=203mV
The spice simulation Figures 5, 6, and 7 demonstrate the effects
of headroom versus attenuation for 3.3, 15, and 28V respectively.
The attenuation and power dissipation will decrease with
headroom setting so a trade-off can be selected for efficiency
versus attenuation. The transient performance is proportional to
the headroom setting, power source response time and the
capacitance present at the input to the QPO-1. The capacitance
may be within the power supply that is used or supplemented by
external capacitance. Consideration of the source’s sensitivity to
additional output capacitance and stability must be understood
before additional capacitance is added for enhancement of
transient performance.
-
5
0
VHR=256mV
VHR=300mV
-
1
0
0
100Hz
10Hz
1.0kHz
10kHz
100kHz
1. 0MHz
Frequency
Figure 6 – Attenuation vs frequency @ 15 volts
The QPO-1 has two additional features that the user can select to
further optimize performance. The first is a headroom slope
adjustment that reduces the headroom voltage drop with
increasing load current. The second is a peak detector function
that increases the headroom voltage by the peak of the ripple
voltage.
VOUT = 28V, ILOAD = 10A
0
VHR=103mV
VHR=134mV
VHR=167mV
dB
VHR=203mV
Headroom Slope Adjustment
-
5 0
This can be used to allow for more headroom and improved
transient response at lower loads and also to approximate
constant power dissipation over the load range. The slope of this
curve is set by the slope adjust resistor RSA. See below for setting
the RSA value. The headroom in Figures 5, 6, and 7 are at 10A
and have been reduced by 150mV from the low current
headroom setting with the slope function using an RSA value of
8.2kΩ. This feature is useful to improve efficiency when used
with converters that have decreasing ripple with increasing load
current such as is typical with Vicor products.
VHR=256mV
VHR=300mV
-
1
0
0
10Hz
100Hz
1.0kHz
10kHz
100kHz
1. 0MHz
Frequency
Figure 7 – Attenuation vs Frequency @ 28 volts
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
Page 4 of 8
Set your site on VICOR at www.vicorpower.com
PRELIMINARY
The slope adjust feature can be set to zero providing relative
constant headroom versus load using an RSA of 100kΩ. 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.
Module
+ OUT
QPOIN
1k
PEAKIN
RSA = ((∆I*0.05)/∆V) *2500
0.1µF
Example: For a 5A maximum load and a 150mV
reduction in headroom.
RSA =((5A*0.05/0.15V)*2500Ω = 4.167kΩ
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.
Figure 8 – Peak detector Disable Circuit
0
QPO-1 Attenuation vs. Power
Iload=10A
-10
-20
-30
-40
-50
-60
1% Rhr std. values for VOUT=3.3V 15V 28V
R
ss
=100k (delta Vhr = 0mV from 0.1 to 10A)
3.3V 15V 28V
69.8k 324k 602k
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.
dB
47.5k 215k 402k
39.2k 178k 332k
30.1k 137k 255k
24.9k 113k 210k
500kHz
50Hz
21k 95.3k 178k
1
2
3
4
Watts
Figure 9 – Power vs Attenuation without slope
The following is a summary of the optional configurations that a
user can select for the QPO-1.
0
• No slope adjust, no peak detect:
fixed headroom over ripple amplitude and current.
QPO-1 Attenuation vs. Power
-10
Iload=10A
1% Rhr std. values for VOUT=3.3V 15V 28V
Rss=7.1k (delta Vhr =150mV from 0.1 to 10A)
3.3V 15V 28V
27.4k 124k 232k
• Same as above, but with peak detect enabled:
-20
-30
-40
-50
-60
peak of ripple amplitude is added to the headroom voltage
optimizing headroom with varying ripple amplitude.
24.9k 113k 210k
• No peak detection with slope adjust:
to improve transient load range and efficiency trading off
attenuation at high current.
dB
22.6k 102k 191k
• Using both peak detection and slope adjust:
to accommodate ripple amplitude variation with increased
transient capability and efficiency.
21k 95.3k 178k
18.2k 82.5k 154k
16.5k 75k 140k
500kHz
50Hz
14.3k 64.9k 121k
1
2
3
4
Watt
Figure 10 – Power vs Attenuation with slope adjust
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
Page 5 of 8
Set your site on PICOR at www.picorpower.com
PRELIMINARY
Figures 11, 12, and 13 show the headroom performance at 3.3,
15, and 28 volts respectively with an RSA = 8.2k for the three plots.
Headroom vs. Load, Vout = 3.3V
600mV
400mV
200mV
0V
R
HR
=
14.3k
R
R
HR
HR
=
=
16.5k
18.2k
R
HR
=
20.5k
R
R
R
HR
HR
HR
=
=
=
22.6k
24.9k
27.4k
1A
2A
3A
4A
5A
6A
7A
8A
9A
10A
LOAD Current
Figure 11 – Headroom vs Current @ 3.3V with 150mV of slope
adjust from 0.1A to 10A
Headroom vs. Load, Vout = 15V
600mV
R
HR
=
64.9k
400mV
200mV
0V
R
HR
=
75k
R
R
HR
=
=
82.5k
HR
93.1k
R
HR
HR
HR
=
102k
113k
124k
R
=
=
R
1A
2A
3A
4A
5A
6A
7A
8A
9A
10A
LOAD Current
Figure 12 – Headroom vs Current @ 15V with 150mV of slope
adjust from 0.1A to 10A
Headroom vs. Load, Vout = 28V
600mV
R
HR
=
121k
400mV
200mV
0V
R
HR
HR
=
140k
154k
R
=
R
HR
=
174k
R
HR
HR
=
=
191k
210k
R
R
HR
=
232k
1A
2A
3A
4A
5A
6A
7A
8A
9A
10A
LOAD Current
Figure 13 – Headroom vs Current @ 28V with 150mV of slope
adjust from 0.1A to 10A
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
Page 6 of 8
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PRELIMINARY
Mechanical Drawings
SiP Bottom View
Pad Dimensions and Locations
0.984
0.046
0.046
0.200
0.192
0.046
0.192
0.200 0.984
Detail A (4 places)
0.200
0.046
0.250
0.177 ±0.006
Detail C (1 place)
0.062
SiP Bottom View
Pad Designations
Detail B (15 places)
0.062
RAMIN 11,12,13,14,18
RAMOUT 7,8,9,10,17
GND 1,19,20
0.092
0.092
0.125
0.125
SC SET
6
SC 16
CESR
SLOPE ADJ
VREF
5
2
3
4
REFGND
15
PEAKIN
LGA Pattern
9
10 11 12
13
14
15
16
8
7
6
5
VOUT
VIN
17
20
18
19
PEAKIN
SC
SC SET
CESR
1
4
3
2
C
L
0.125
0.050
0.050
0.050
0.100
0.050
0.150
0.050
0.050
0.050
0.050
C
L
0.075
0.075
0.100
0.050
0.150
0.050
ÿ0.030
(96 places)
0.075
BGA Pattern
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
Page 7 of 8
Set your site on PICOR at www.picorpower.com
Vicor’s comprehensive line of power solutions includes modular, high-
density AC-DC & DC-DC modules and accessory components, fully
configurable AC-DC & DC-DC power supplies, and complete custom
power systems.
Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is
assumed by Vicor for its use. No license is granted by implication or otherwise under any patent or patent
rights of Vicor. Vicor components are not designed to be used in applications, such as life support systems,
wherein a failure or malfunction could result in injury or death. All sales are subject to Vicor’s Terms and
Conditions of Sale, which are available upon request.
Specifications are subject to change without notice.
Component Solutions
45
for Your Power System
Vicor Corporation
25 Frontage Road
Andover, MA, USA 01810
Tel: 800-735-6200
Fax: 978-475-6715
Email
Vicor Express: vicorexp@vicr.com
Technical Support: apps@vicr.com
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
QPO-1 Data Sheet
P/N 26090
Rev. 1.0
12/02/10M
Set your site on VICOR at www.vicorpower.com
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