FEATURES
High efficiency: 91.5% @ 12V/8.3A
Size:
57.9x36.8x9.6mm (2.28”x1.45”x0.38”)
(without heatspreader)
57.9x36.8x12.7mm (2.28”x1.45”x0.50”)
(with heatspreader)
Standard footprint
Industry standard pin out
2:1 Input voltage range
Fixed frequency operation
Input UVLO, Output OCP, OVP, OTP
2250V isolation and basic insulation
No minimum load required
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing
facility
UL/cUL 60950-1 (US & Canada)
recognized, and TUV (EN60950-1)
certified
Delphi Q48SC Series DC/DC Power Modules:
36~75V in, 12V/8.3A out, 100W
OPTIONS
The Delphi Q48SC series, quarter brick sized, 48V input, single output,
isolated DC/DC converter, is the latest offering from a world leader in
power system technology and manufacturing
―
Delta Electronics, Inc.
The Q48SC 12V provides up to 100 watts of power in an industry
standard footprint and pinout. With creative design technology and
optimization of component placement, these converters possess
outstanding electrical and thermal performances, as well as extremely
high reliability under highly stressful operating conditions. All models are
fully protected from abnormal input/output voltage, current, and
temperature conditions. The Delphi Series converters meet all safety
requirements with basic insulation.
Positive On/Off logic
Short pin lengths
APPLICATIONS
Telecom/Datacom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_Q48SC12008_08232011
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Operating Hot Spot Temperature
Storage Temperature
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
Inrush Current (I
2
t)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Load
Over Line
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output Over Current Protection
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
Positive Step Change in Output Current
Negative Step Change in Output Current
Settling Time (within 1% Vout nominal)
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Maximum Output Capacitance
EFFICIENCY
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Logic High (Module On)
ON/OFF Current (for both remote on/off logic)
Leakage Current (for both remote on/off logic)
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Weight
Over-Temperature Shutdown
NOTES and CONDITIONS
Q48SC12008 (Standard)
Min.
Typ.
Max.
80
100
120
125
1500
75
34
32
2
60
3
35
33
3
3.1
120
10
1
Units
Vdc
Vdc
°C
°C
Vdc
Vdc
Vdc
Vdc
Vdc
A
mA
mA
A
2
s
mA
dB
Vdc
mV
mV
mV
Vdc
mV
mV
A
A
mV
mV
us
ms
ms
µF
%
%
1500
100
3300
300
Vdc
MΩ
pF
kHz
0.8
12
0.8
12
1
50
10
10
18
1.68
27.5
49
130
V
V
V
V
mA
uA
%
%
V
M hours
Grams
Grams
°C
100ms
Refer to Figure 21 for measuring point
-40
-55
36
33
31
1
100% Load, 36Vin
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=48V, Io=Io.max, Tc=25°C
Io=Io,min to Io,max
Vin=36V to 75V
Tc=-40°C to 85°C
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
11.88
25
50
12
±10
±10
±100
11.64
40
10
0
9.2
12.12
±24
±24
12.36
100
30
8.3
11.2
480
480
25
25
2200
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
200
200
200
15
15
Full load; 5% overshoot of Vout at startup
91.5
92.0
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Ion/off at Von/off=0.0V
Logic High, Von/off=15V
Pout
≦
max rated power
Pout
≦
max rated power
Over full temp range;
Io=100% of Io, max; Ta=25°C, airflow rate=200FLM
Without heatspreader
With heatspeader
Refer to Figure 21 for measuring point
-0.7
3.5
-0.7
3.5
-20
14.4
DS_Q48SC12008_08232011
2
ELECTRICAL CHARACTERISTICS CURVES
Figure 1:
Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C, 300LFM airflow.
Figure 2:
Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C, 300LFM airflow.
Figure 3:
Typical full load input characteristics at 25°C
DS_Q48SC12008_08232011
3
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
Figure 4:
Turn-on transient at full rated load current (resistor
load) (2ms/div). Vin=48V. Top Trace: Vout, 5V/div; Bottom
Trace: ON/OFF input, 5V/div
Figure 5:
Turn-on transient at zero load current (2ms/div).
Vin=48V. Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input,
5V/div
For Positive Remote On/Off Logic
Figure 6:
Turn-on transient at full rated load current (resistor
load) (2ms/div) for positive on/off mode. Vin=48V. Top Trace:
Vout, 5V/div; Bottom Trace: ON/OFF input, 5V/div
Figure 7:
Turn-on transient at zero load current (2ms/div) for
positive on/off mode. Vin=48V. Top Trace: Vout, 5V/div; Bottom
Trace: ON/OFF input, 5V/div
DS_Q48SC12008_08232011
4
ELECTRICAL CHARACTERISTICS CURVES
Figure 8:
Output voltage response to step-change in load
current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap:
10µF tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (0.2V/div, 200us/div), Bottom Trace: Iout (1A/div). Scope
measurement should be made using a BNC cable (length
shorter than 20 inches). Position the load between 51 mm to 76
mm (2 inches to 3 inches) from the module
Figure 9:
Output voltage response to step-change in load
current (75%-50%-75% of Io, max; di/dt = 2.5A/µs). Load cap:
47µF, 35m
Ω
ESR solid electrolytic capacitor and 1µF ceramic
capacitor. Top Trace: Vout (0.2V/div, 200us/div), Bottom Trace:
Iout (1A/div). Scope measurement should be made using a
BNC cable (length shorter than 20 inches). Position the load
between 51 mm to 76 mm (2 inches to 3 inches) from the
module
Figure 10:
Test set-up diagram showing measurement points
for Input Terminal Ripple Current and Input Reflected Ripple
Current.
Note: Measured input reflected-ripple current with a simulated
source Inductance (L
TEST
) of 12 µH. Capacitor Cs offset
possible battery impedance. Measured current as shown below
Figure 11:
Input Terminal Ripple Current, i
c
, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (100 mA/div, 2us/div)
DS_Q48SC12008_08232011
5
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