Delta Electronics H48SN User manual

FEATURES
 High Efficiency: 91.0% @ 28V/12.5A
 Size: 61.0x57.9x12.7mm (2.40”×2.28”×0.50”)
 Standard footprint
 Industry standard pin out
 Fixed frequency operation
 Metal baseplate
 Input UVLO, Output OCP, OVP, OTP
 Basic insulation
 2250V isolation
 2:1 Input voltage range
 ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing facility
 UL/cUL 60950-1 (US & Canada) recognized,
and TUV (EN60950-1) certified
 CE mark meets 73/23/EEC and 93/68/EEC
directive
Delphi Series H48SN, 350W Half Brick Family
DC/DC Power Modules: 48V in, 28V/12.5A out
APPLICATIONS
 Telecom / Datacom
 Wireless Networks
ork Equipment
ata Storage
OPTIONS
 Positive Remote On/Off logic
 Short pin lengths available
The Delphi Series H48SN Half Brick, 48V input, single output,
isolated DC/DC converters are the latest offering from a world leade
r
in power systems technology and manufacturing -- Delta Electronics,
Inc. This product family provides up to 350 watts of power in an
industry standard footprint. It provides 91% efficiency for 28V at full
load. With creative design technology and optimization of component
placement, these converters possess outstanding electrical and
thermal performance, as well as extremely high reliability unde
r
highly stressful operating conditions.
A
ll models are fully protected
from abnormal input/output voltage, current, and temperature
conditions. The Delphi Series converters meet all safety
requirements with basic insulation. A variety of optional heatsinks are
available for extended thermal operation as well as for use in highe
r
air flow applications: 200 to 400 LFM.
 Optical Netw
 Server and D
 Industrial / Testing Equipment
DATASHEET
012_01172008
DS_H48SN28

TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=600 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
H48SN28012_01172008
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PARAMETER NOTES and CONDITIONS H48SN28012 (Standard)
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous 80 Vdc
Transient (100ms) 100ms 100 Vdc
Operating Temperature Please refer to Fig.21 for measuring point -40 110 °C
Storage Temperature -55 125 °C
Input/Output Isolation Voltage 2250 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage 36 48 75 Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold 33 35 Vdc
Turn-Off Voltage Threshold 31 33 Vdc
Lockout Hysteresis Voltage 1 3 Vdc
Maximum Input Current 100% Load, 36Vin 12.6 A
Minimum -Load Input Current 260 mA
Off Converter Input Current Per ETSI EN300 132-2 15 mA
Inrush Current(I2t) 0.2 1 A2s
Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 12 mA
Input Voltage Ripple Rejection 120 Hz 60 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25°C 27.72 28.00 28.28 Vdc
Output Voltage Regulation
Over Load Io=Io,min to Io,max ±20 ±112 mV
Over Line Vin=36V to 75V ±20 ±56 mV
Over Temperature Tc=-40°C to 100°C ±250 ±300 mV
Total Output Voltage Range over sample load, line and temperature 27.25 28.00 28.75 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 1µF ceramic, 10µF Low ESR cap 60 150 mV
RMS Full Load, 1µF ceramic, 10µF Low ESR cap 14 40 mV
Operating Output Current Range 0.3 12.5 A
Output DC Current-Limit Inception Output Voltage 10% Low 120 %
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient 48V, Tested with a aluminum ,10µF Low ESR cap
and 1
µ
F Ceramic load ca
p
,ΔIo/Δt=1A/10
µ
S
Positive Step Change in Output Current 50% Io.max to 75% Io.max 150 mV
Negative Step Change in Output Current 75% Io.max to 50% Io.max 150 mV
Settling Time (within 1% Vout nominal) 300 us
Turn-On Transient
Start-Up Time, From On/Off Control 20 35 ms
Start-Up Time, From Input 20 35 ms
Output Capacitive Load Full load; 5% overshoot of Vout at startup 330 5000 µF
EFFICIENCY
100% Load 91.0 %
60% Load 91.5 %
ISOLATION CHARACTERISTICS
Input to Output 2250 Vdc
Input to Case 2250 Vdc
Output to Case 500 Vdc
Isolation Resistance 10 MΩ
Isolation Capacitance 1900 pF
FEATURE CHARACTERISTICS
Switching Frequency 330 kHz
O
N
/O
FF
Co
ntr
o
l N
ega
tiv
e
R
e
m
o
t
e
O
n
/O
ff l
og
i
c
Logic Low (Module On) Von/off at Ion/off=1.0mA 0 0.8 V
Logic High (Module Off) Von/off at Ion/off=0.0 µA 15 V
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off) Von/off at Ion/off=1.0mA 0 0.8 V
Logic High (Module On) Von/off at Ion/off=0.0 µA 15 V
ON/OFF Current Ion/off at Von/off=0.0V 1 mA
Leakage Current Logic High, Von/off=15V 50 uA
Output Voltage Trim Range Across Pins 9 & 5, Pout ≦max rated power -40 +10 %
Output Voltage Remote Sense Range Pout ≦max rated power 0.5 V
Output Over-Voltage Protection Over full temp range; % of nominal Vout 115 140 %
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; Ta=25°C 1.35 M hours
Weight 62 grams
Over-Temperature Shutdown Please refer to Fig.21 for measuring point 115 °C

ELECTRICAL CHARACTERISTICS CURVES
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
024681012
OUTPUT CURRENT(A)
POWER DISSIPATION (W)
70
75
80
85
90
95
02 46 81012
OUTPUT CURRENT (A)
EFFICIENCY (%)
14
36Vin 48Vin 75Vin
14
36Vin 48Vin 75Vin
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C.
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE (V)
INPUT CURREN (A)
Io=12.5A Io=7.5A Io=1.25A
Figure 3: Typical input characteristics at room temperature
H48SN28012_01172008
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ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
Figure 4: Turn-on transient at full rated load current (resistive
load) (10ms/div). CH3: Vout;5V/div; CH1: ON/OFF input: 2V/div
Figure 5: Turn-on transient at minimum load current
(10ms/div). CH3: Vout: 5V/div; CH1: ON/OFF input: 2V/div
For Positive Remote On/Off Logic
Figure 6: Turn-on transient at full rated load current (resistive
load) (10ms/div). Top Trace: Vout; 5V/div; Bottom Trace:
ON/OFF input: 2V/div
Figure 7: Turn-on transient at zero load current (10ms/div). Top
Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 2V/div
H48SN28012_01172008
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ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current (75%-50% of Io, max; di/dt = 1A/10µS
)
. Load cap:
330µF aluminum,10uF Low ESR capacitor and 1µF ceramic
capacitor. Top Trace: Vout (100mV/div), Bottom Trace: Iout
(5
A
/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 (50%-75% of Io, max; di/dt = 1A/10µS
)
. Load cap:
330µF aluminum,10uF Low ESR capacitor and 1µF ceramic
capacitor. Top Trace: Vout (100mV/div), Bottom Trace: Iout
(5
A
/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 (LTEST
)
of 12 μH. Capacitor Cs offset
possible battery impedance. Measure current as shown above.
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