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| 型号： | QPI-10LZ-01 |
| 厂商： | Vicor Corporation |
| 文件页数： | 4/8页 |
| 文件大小： | 0K |
| 描述： | IC HOT SWAP EMI FILTER 10LGA |
| 标准包装： | 20 |
| 系列： | Picor®, QUIETPOWER® |
| 类型： | 热交换开关 |
| 应用： | AdvancedTCA |
| 内部开关： | 是 |
| 电流限制： | 6A |
| 电源电压： | 36 V ~ 76 V |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
| 其它名称： | 1102-1108-5 |
per board limit in the PICMG 3.0. The 1.0” x 1.0” x
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 70°C PCB temperature. It is well suited for the 200 W
?
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 70°C.
8.00
6.00
4.00
2.00
QPI-10 Current Derating Curve
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
0.00
0
20
40 60
Temperature °C
80
100
current-control mode depending on the state of the
control function.
The QPI-10 has two signal pins that can be used to
Figure 5 – QPI-10 current derating curve over temperature.
UV/OV Trim
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 QPI-
10. 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.
90.00
80.00
70.00
60.00
50.00
OV-High
OV-Low
UV-High
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
40.00
30.00
0
5000
10000
15000
UV-Low
20000 25000
30000
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.
Picor Corporation ? www.picorpower.com
Series Resistor
Figure 6 – Trimming UV/OV with an external series resistor
UVEN LO =2.5 V(RUVEN + 108450)
8450
UVEN HI = 2.5 V + (RUVEN + 100K)(316μA)
OV LO = 2.5 V + (ROV + 200K)(348μA)
OV HI =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.
QPI-10 Data Sheet Rev. 1.4 Page 4 of 8
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