QUS40-096
www.murata-ps.com
Isolated Bus Converter
INPUT CHARACTERISTICS
Parameter
Input voltage operating range
OBSOLETE PRODUCT
Conditions1
Min.
38
Typ.
48
Max. Units
55
Input voltage absolute
maximum
60
Turn-on threshold
34
32
35.5
33.5
2
36
Input undervoltage lockout
Input overvoltage lockout
Turn-off threshold
34
VDC
Hysteresis voltage
Turn-on threshold
55
57
58
Turn-off threshold
58.5
2
59.5
Hysteresis voltage
Steady-state (40 AOUT)
Enabled state, no load (48VIN)
Disabled state (48VIN)
Maximum input current
No-load input current
Disabled input current
8.4
100
7
9
ADC
mA
mA
FEATURES
ꢀRoHS compliant
ꢀ48 VIN, Isolated, 5:1 fixed conversion ratio
ꢀ385W power at 48VIN
Measured into the input pin
Input capacitor 47μF type
Nichicon UPM1J470MPH or equivalant
Input reflected ripple current
300
mA rms
ꢀ300W output at 38 VIN, 55ºC, 200 LFM
ꢀIndustry standard ¼ brick footprint
On state range
-0.1
2.4
0.8
VDC
VDC
KΩ
Enable - negative logic version
Internal 27.4KΩ
pulled-up to internal 5.0V
Off state range
15.0
ꢀRemote enable (primary side, positive or
negative)
Resistance from enable pin
to -VIN
With +VIN pin open, or tired to -VIN
16.12
ꢀOver-temperature, over current protections
ꢀDirect parallel operation for higher power
OUTPUT CHARACTERISTICS
Parameter
Output voltage set point
Output load regulation
Conditions1
VIN = 48V, IO = 0A
Min.
9.40
Typ.
9.50
0.35
Max.
9.60
Units
VDC
V
DESCRIPTION
IO = 0 to 40A
The QUS40-096 is a RoHS compliant fixed 5:1
ratio converter in an industry standard quarter
brick footprint. The output is unregulated and the
5:1 fixed ratio is maintained between the input
and output voltages. It features input voltage
range of 38V to 55V, and provides up to 384W @
48Vin of power or 300W at 38Vin @ 55ºC, typical
efficiency of 9.6V module is 96.6%. It can be
parallel for more power.
VIN = 38 to 55V, PO = 0 to 300W,
Ta = 55ºC
Output voltage total regulation
7.0
0
11.0
VDC
Output ripple & noise2
Output current operating range
Efficiency
20MHz bandwidth
Corresponding to PO = 300W
VIN = 48V, PO = 300W
80
150
42
mV p-p
A
96.6
0.5
%
From enable, <0.8V to VO> 10%
for VIN = 38V - 55V
Turn-on delay
10
15
ms
Output voltage rise time3
Start-up inhibit time
Transient response3
From 10% to 90%
12
ms
ms
Enabled: VIN applied to 90% VOUT
25% step, 1A/μs, Co=1200μF
140
220
350
10
%VO
Current sharing accuracy
(up to 3 in parallel)
At PO = 300W
5
%
Output turn on overshoot
Output turn off undershoot
Maximum output capacitance
0
0
350
350
mV
mV
μF
3750
1
2
3
VIN = 48Vdc, Ta = 25ºC, Airflow = 200LFM for all data unless otherwise noted.
Output Ripple Voltage and noise is specified when measured with a 10μF tantalum and a 1uF ceramic capacitor at the output pins.
During output voltage rise time (15ms Max.), output power shall be limited to 50% constant power.
Transient response is specified with a 960μF capacitor at the output of the converter.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
email: sales@murata-ps.com
25 Jun 2010 MDC_QUS40-096.B02Δ Page 1 of 3
