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(R)
QPI-10
QUIETPOWER (R)
AdvancedTCATM Hot-Swap SiP with V*I Chip EMI Filter
Description
The QPI-10 integrates a total hot-swap function with an EMI filter for V*I Chip applications. The product TM aligns with the AdvancedTCA PICMG3.0 require-ments for hot insertion and board level conducted noise limitations. The EMI filter provides conducted common-mode (CM) and differential-mode (DM) noise attenuation from 150 kHz to 30 MHz. The QPI-10 is designed for use on a 48 or 60 Vdc bus (36 - 76 Vdc). The inrush current limit and circuit breaker are designed to satisfy the 200 W per board PICMG3.0 limit up to 70C PCB temperature around the QPI-10. The under and overvoltage thresholds can be trimmed separately via the UVEN and OV inputs using external series resistors. The QPI-10 provides two Power Good signals, with one referenced to the input ground and the other to the output ground, which can be used to enable other circuits along with the V*I Chip converter.
Features
* > 40 dB CM attenuation at 1 MHz * > 60 dB DM attenuation at 1 MHz * 80 Vdc (max input) * 100 Vdc surge 100 msec * 1500 V hipot hold off to shield * 6 A breaker with delay plus 12 A limiter * 25 mm x 25 mm x 4.5 mm SiP (System-in-Package) * Low profile LGA package * - 40 to +100C PCB temperature (See Fig. 5) * Hot-swap & filter combined saves PCB space * Efficiency ~99% * Connects between OR'ing diodes & power conversion input hold-up capacitance * Patents pending * TUV approval
Applications
* Telecom & ATCA PICMG(R) 3.0 boards using Vicor's V*I Chip technology
Figure 1 - Block Diagram
Figure 2 - Typical Attenuation
Picor Corporation * www.picorpower.com
QPI-10 Data Sheet Rev. 1.4 Page 1 of 8
Absolute Maximum Ratings - Exceeding these parameters may result in permanent damage to the product.
Pins BUS+, SW, PWRGD1, PWRGD2 to BUSBUS+, SW, PWRGD1, PWRGD2 to BUSBUS+ / BUS- to Shield QPI+ to QPIPackage Package Package Package Package Package Package All Pins Parameter Input voltage Input voltage BUS inputs to shield hipot Input to output current Power dissipation Operating temperature Thermal resistance Junction temperature Thermal resistance Storage temperature Reflow temperature ESD 20 s exposure @ HBM
(2)
Notes Continuous 100 ms transient
Min -0.5
Typ
Max 80 100 +/-1500
Units Vdc Vdc Vdc Adc W C C/W C C/W C C kV
Pulsed limit @ 25C VBUS = 48 V, 6 Adc, 25C PCB to QPI interface Free air Tb = 100 C Pd = 3W @15C/W PCB layout dependent
(1)
12 3.0 -40 100 50 145 15 -40 125 212 +/-2
Note 1: Refer to Figure 14 and Figure 15 for critical PCB layout guidelines to achieve this thermal resistance when reflowed onto the PCB. Note 2: RoHS compliant product maximum peak temperature is 245C for 20 seconds.
Electrical Characteristics - Parameter limits apply over the operating PCB temperature range unless otherwise noted
Symbol Vb+bV+oi V-oi CMIL DMIL I BUS + to BUSUV UVHYS OV OVHYS PWRGD1SAT PWRGD2SAT PWGLK Parameter BUS+ to BUS- input range BUS+ to QPI+ voltage drop BUS- to QPI- voltage drop Common-mode insertion loss Differential-mode insertion loss Input bias current at 80 V Undervoltage threshold - rising Undervoltage hysteresis - falling Overvoltage threshold - rising Overvoltage hysteresis - falling Power Good low voltage Power Good low voltage Power Good high leakage Notes Measured at 5 A
(3) (3) (3)
Min UV
Typ 80 110 -380
Max
Units Vdc mVdc mVdc dB dB
Measured at 5 A
Measured at 5 A
VBUS = 48 V frequency =1 MHz VBUS = 48 V frequency =1 MHz Input current from BUS+ to BUSCritical maximum DC load Controller disabled to enabled Controller enabled to disabled Controller enabled to disabled Controller disabled to enabled IPWG = 1 mA, referenced to BUSIPWG = 1 mA, referenced to QPIVPWG = 80 V
40 60 10 25 34 UV - 2 V 76 OV - 4 V 0.2 0.2 0.6 0.6 1
mA mA V V V V mV mV A
IPG QPI+ to QPI- Load current prior to PWRGD
Note 3: Refer to Figure 5 for current derating curve
Pad Description
Pin Number 1, 16 2, 3, 15 4 5, 6 7, 8 10 9 12, 13 14 11 Name BUSDescription
PWRGD2 PWRGD1 OV BUS+
Negative bus potential Negative rail controlled by hot insertion SW function. Shield connects to the converter shield SHIELD and Y capacitor common point via RY QPINegative input to the converter QPI+ Positive input to the converter Open drain, referenced to BUS-, that PWRGD1 asserts low when power is NOT good Open drain, referenced to QPI-, that PWRGD2 asserts low when power is NOT good BUS+ Positive bus potential UVEN Highside of UV resistor divider OV Highside of OV resistor divider
9
QPI+
10
11
12 13
BUS+
8 7 6
QPI-10 SiP Package (Bottom View)
14 15 16
UVEN
SW
QPI-
5 4
SHIELD
BUS-
3
SW
2
1
BUS-
Picor Corporation * www.picorpower.com
QPI-10 Data Sheet Rev. 1.4 Page 2 of 8
Applications Information
The QPI-10 is an EMI filter especially designed for V*I Chip products, providing conducted common-mode and differential-mode attenuation from 150 kHz to 30 MHz. Designed for the telecom and ITE bus range, the (R) QPI supports the PICMG 3.0 specification for filtering system boards using Vicor's V*I Chip technology to the EN55022 Class B limit. The resulting plot in Figure 4 shows the QPI-10 is effective in reducing the V*I Chip total noise spectrum to well below the EN55022 Class B Quasi-peak detection limit. The plot in Figure 4 was taken using the standard 50 / 50 H LISN and measurement conditions, with the Peak detection mode of the spectrum analyzer, for a conducted EMI test. The results are compared to the CISPR22 EN55022 Class B Quasi-peak detection limit showing the total noise spectrum for V*I Chip combination using a P048K048T24 and V048K120T025 with a QPI-10 connected, as shown in Figure 3.
Figure 3 - Standard LISN test setup, 170 W load.
Figure 4 - Conducted EMI profile of V*I Chip with QPI-10.
Picor Corporation * www.picorpower.com
QPI-10 Data Sheet Rev. 1.4 Page 3 of 8
Applications Information - Hot-Swap
The QPI-10's high-temperature rating of 6 A provides filtering for up to 288 W of power from a 48 V bus with a 70C PCB temperature. It is well suited for the 200 W (R) per board limit in the PICMG 3.0. The 1.0" x 1.0" x 0.2" surface mount LGA package provides ease of manufacturing by eliminating through-hole assembly. The current derating curve, shown in Figure 5, should be used when the PCB temperature that the QPI-10 is mounted to exceeds 70C. The hot-swap feature is created with an internal switch that controls the current path between BUS- and SW pins. The state of the switch can be on, off or in a current-control mode depending on the state of the control function. The QPI-10 has two signal pins that can be used to indicate the power-up status of the QPI-10. Both are active-low when power is not good. PWRGD1 is an opendrain that is referenced to the BUS- rail of the QPI10. PWRGD2 is an opendrain that is referenced to the QPI- rail, allowing it to directly control the Enable pin of the V*I Chip converter, without any kind of signal translation required. An example circuit of both options can be seen in Figures 8a and 8b. The QPI-10 is designed to have an under-voltage hysteretic range of 32 V to 34 V when the UVEN pin is tied to the BUS+ pin with no additional series resistance. The QPI-10 becomes enabled when the input voltage exceeds 34 V and continues to work down to 32 V before being disabled. The over-voltage hysteretic range is designed to be 72 V to 76 V when the OV pin is tied to the BUS+ pin without a trimming resistor in series. The QPI-10 remains functioning until the OV surpasses 76 V, where it will shutdown until the input voltage falls below 72 V. External resistors can be added to trim the UV and OV trip points higher. The graph in Figure 6 shows the trimming effect for a range of external series resistors. The equations in Figure 7 can be used to calculate the required series resistor for increasing the preprogrammed trip points. An external capacitor CE, shown in Figures 8a and 8b, will provide the required hold-up filtering during the AdvancedTCA`s 5 ms, zero-volt BUS transient event. This filtering will enable the Power Good state of the QPI-10 to remain unchanged during this transient, provided there is enough hold-up capacitance and input energy to maintain the power converter's operation. Without this capacitor, the QPI-10 would detect an undervoltage fault and shut off its internal pass switch. The fault would also initiate a restart of the hot-swap control and would require up to 20 ms to turn back on its internal switch.
8.00 6.00
QPI-10 Current Derating Curve
Current (A)
4.00
2.00
0.00 0
20
40
60
80
100
Temperature C
Figure 5 - QPI-10 current derating curve over temperature.
UV/OV Trim
90.00
OV-High
80.00 70.00
OV-Low
Voltage
60.00 50.00 40.00 30.00 0 5000 10000 15000
UV-High UV-Low
20000 25000 30000
Series Resistor
Figure 6 - Trimming UV/OV with an external series resistor
UVENLO =2.5 V(RUVEN + 108450) 8450 UVENHI = 2.5 V + (RUVEN + 100K)(316A) OVLO = 2.5 V + (ROV + 200K)(348A) OVHI =2.5 V(ROV + 206800) 6800
Figure 7 - UVEN and OV resistor equations.
Note: If the CE Capacitor is used, a maximum value of 1 k should be used for RUVEN to prevent damaging the enabling diodes.
Picor Corporation * www.picorpower.com
QPI-10 Data Sheet Rev. 1.4 Page 4 of 8
Figure 8a - Typical ATCA system with QPI-10 and high enable converter.
Figure 8b - Typical ATCA system with QPI-10 and high enable converter.
Picor Corporation * www.picorpower.com
QPI-10 Data Sheet Rev. 1.4 Page 5 of 8
Start-up
The following oscilloscope pictures show the hot-swap BUS- current, QPI- to BUS- voltage and PWRGD to BUSoutput voltage of the QPI-10 during operation. Figures 9 and 10 are the QPI-10's inrush characteristics under two load capacitance conditions. In Figure 9 a 470 F capacitor required roughly 170 ms to completely charge from a 48 V bus voltage. The QPI-10 can drive large amounts of bulk capacitance to satisfy AdvancedTCA's transient hold-up requirement (PICMG 3.0, 4.1.4.3) as shown in Figure 10 with a 4,700 F load capacitance. Under this condition the PWRGD takes about 8.7 seconds to go high after the UVEN input is pulled high upon the complete insertion of the board into the shelf. Figure 10's time-scale is too long to show the current pulses that charge the bulk capacitance.After insertion, when the UVEN voltage exceeds 34 V the UV detection fault is cleared, the QPI10 goes through a delay cycle (~15 ms) to allow for system stabilization and debounce. After this time, the QPI- to BUS- path is turned on and current is allowed to pass, monitored by the current sense function. Initially the current level exceeds the 6 A circuit breaker limit, the event timer starts and the Power Good state is not valid. The sense function and linear control loop will allow twice the circuit breaker current to pass. If the current does not drop below the circuit breaker level prior to reaching the timer limit, typically 275 s, the QPI- to BUS- path will open. The effective duty cycle under the current limit condition is approximately 1%. Once the load capacitors are fully charged to the input bus potential, the load condition falls below 6 A and the PWRGD pin is asserted high, providing that the bus supply is still within the valid UV and OV range.
Figure 9 - 470 F capacitor @ 48 V.
Figure 10 - 4700 F capacitor @ 72 V.
Transient Protection and Recovery
Figures 11 and 12 show the QPI-10's ability to handle low resistance shorts (< 2) at the load terminals to emulate fast and slow blown fuse events. In Figure 11, the transient short is 2 seconds long and the QPI- to BUS- path is opened within 400 s of this occurrence. Figure 12 demonstrates the QPI-10's performance with a continuous short circuit on its output, where it remains in a low duty cycle mode until the short is removed, then restarts normally.
Figure 11 - 2 seconds short-circuit.
Figure 12 - Start-up into short circuit.
Picor Corporation * www.picorpower.com
QPI-10 Data Sheet Rev. 1.4 Page 6 of 8
Mechanical & Layout Information
Figure 13 - SiP package mechanicals; LGA pad, package height and pad location dimensions - inches.
Figure 14 - Recommended PCB Receiving Pattern.
QPI-10 PCB Layout Recommendations
The filtering performance of the QPI-9 and -10 is sensitive to capacitive coupling between its input and output pins. Parasitic plane capacitance must be kept below 1 pico-Farad between inputs and outputs using the layout shown above and the recommendations described below to achieve maximum conducted EMI performance. To avoid capacitive coupling between input and output pins, there should not be any planes or large traces that run under both input and output pins, such as a ground plane or power plane. For example, if there are two signal planes or large traces where one trace runs under the input pins, and the other under the output pins, and both planes over-lap in another area, they will cause capacitive coupling between input and output pins. Also, planes that run under both input and outputs pins, but do not cross, can cause capacitive coupling if they are capacitively by-passed together. Figure 16 shows the recommended pcb layout on a 2 layer board. Here, the top layer planes are duplicated on the bottom layer so that there can be no overlapping of input and output planes. This method can be used for boards of greater layer count.
Figure 15 - Recommended PCB receiving footprint.
Figure 16 - Recommended PCB layout on a 2 layer board
Post Solder Cleaning
Picor lidded QP SIPs are not hermetically sealed and must not be exposed to liquid, including but not limited to cleaning solvents, aqueous washing solutions or pressurized sprays. When soldering, it is recommended that no-clean flux solder be used, as this will insure that potentially corrosive mobile ions will not remain on, around, or under the module following the soldering process. For applications requiring water wash compatibility the "-01" open frame version should be used.
Picor Corporation * www.picorpower.com
Ordering Information
Part Number QPI-10LZ Description
QPI-10 LGA Package, RoHS Compliant QPI-10 LGA, RoHS Compliant QPI-10LZ-01 Open Frame Package
QPI-10 Data Sheet Rev. 1.4 Page 7 of 8
Vicor's comprehensive line of power solutions includes 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.
Vicor Corporation 25 Frontage Road, Andover, MA, USA 01810 Tel: 800-735-6200 Fax: 978-475-6715
Email Sales Support: vicorexp@vicorpower.com Technical Support: apps@vicorpower.com
Picor Corporation * www.picorpower.com * QPI-10 Data Sheet
Rev. 1.4
10/08

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