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参数资料
| 型号： | QPI-10LZ-01 |
| 厂商： | Vicor Corporation |
| 文件页数： | 6/8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 |
Start-up
The following oscilloscope pictures show the hot-swap
BUS- current, QPI- to BUS- voltage and PWRGD to BUS-
output 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 μF
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 μF 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 QPI-
10 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 μs, 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.
Transient Protection and Recovery
Figures 11 and 12 show the QPI-10’s ability to handle
low resistance shorts (< 2 Ω ) at the load terminals to
Figure 9 – 470 μF capacitor @ 48 V.
Figure 10 – 4700 μF capacitor @ 72 V.
Figure 11 – 2 seconds short-circuit.
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 μs 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 12 – Start-up into short circuit.
Picor Corporation ? www.picorpower.com
QPI-10 Data Sheet Rev. 1.4 Page 6 of 8
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