QPO-1 Datasheet, PDF (1/17 Pages) Vicor Corporation – QPO-1 Output Ripple Attenuation SIP

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QPO-1 Output Ripple Attenuation SIP
QPO-1
QUIETPOWER^
Description:
The QPO-1 output ripple attenuator SiP uses active filtering to
reduce output the periodic and random disturbances (PARD)
over 30 dB from 500 Hz to 500 kHz and it can be extended
down to 50 Hz with additional capacitance added to the VREF
pin ⁽¹⁾. The QPO-1 operates over a voltage range from 3 to 30
Vdc and supports load currents as high as 10 A. Output
regulation is maintained with remote sense or trim
adjustment of the power supply. The closed loop architecture
improves transient response and ensures quiet point-of-load
regulation when used in conjunction with the power supply’s
control loop or trim node.
The waveforms in Figure 2 show the
QPO-1’s ability to both filter a
converter’s output ripple and
maintain a constant output voltage
during a load transient. The input
voltage of the QPO-1 (dark blue)
shows varying amplitude and
frequency PARD before and during
the load transient, but the QPO-1
Figure 1 - QPO-
1LZ (~1 in² area)
output voltage (light blue) remains relatively unaffected. The
converter used is a Vicor Mini, 48 Vdc to 5 Vdc converter
(Model number: V48B5C200BN).
Features:
 > 30 dB PARD attenuation, 500 Hz to 500 kHz
 3 - 30 V_DC operating range
 10A rating
 Supports precise point-of load regulation
 Up to 99% efficiency
 User selectable performance optimization for
attenuation, power dissipation, and transient response
 25.3 x 25.3 x 5.0 mm Lidded SiP (System-in-Package)
 24.9 x 24.9 x 4.4 mm Open-frame SiP
 Low profile LGA package
 Closed control loop improves transient response of
most DC-DC converters and power supplies
 Reduces required number of output capacitors to
support dynamic loads.
Applications
 Telecom Base Stations
 Point of Load Power Systems
 Sensors Requiring Low Noise Power
 Medical Instrumentation
QPO-1 Performance
Typical Application
Figure 2 - PARD and Transient Attenuation during a 1A to ^{Figure 3 - Typical Application: SC/Trim supports applications that don’t}
10A load step (~1A/µs).
require remote sense.
Note 1: For off-line supplies, 20 dB of attenuation can be achieved down to 50 Hz with additional capacitance (CHR) added from the VREF pin to the REFGND pin.
PICOR Corporation · picorpower.com
QPO-1
Rev 3.6
Page 1 of 17