FEATURES
High Efficiency: 90.5% @ 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, QS 9000,
OHSAS 18001 certified manufacturing facility
UL/cUL 60950 (US & Canada) recognized,
and TUV (EN60950) certified
CE mark meets 73/23/EEC and 93/68/EEC
directive
Delphi Series H24SN, 350W Half Brick Family
DC/DC Power Modules: 18~36Vin, 28V/12.5A out
The Delphi Series H24SN Half Brick, 24V input, single output, isolated
DC/DC converters are the latest offering from a world leader in power
systems technology and manufacturing -- Delta Electronics, Inc. This
product family provides up to 350 watts of power in an industry
standard footprint. Typical full load efficiency for 24Vin, 28V output is
90.5%. With creative design technology and optimization of component
placement, these converters possess outstanding electrical and
thermal performance, 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. A variety of optional heatsinks are available for extended
thermal operation, as well as for use in higher air flow applications: 200
to 400 LFM.
OPTIONS
Positive on/off logic
Short pin length
APPLICATIONS
Telecom/Datacom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_H24SN28012_07272006
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=24Vdc, nominal Vout unless otherwise noted.)
PARAMETER
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Operating 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
Minimum -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 DC Current-Limit Inception
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
Output Capacitive Load
EFFICIENCY
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Input to Case
Output to Case
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
Leakage Current
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
NOTES and CONDITIONS
Min.
H24SN28012NRFA
Typ.
Max.
Units
40
50
115
125
2250
24
17.5
16.5
1
500
15
0.5
30
60
27.72
28.00
±20
±20
±250
28.00
60
14
0.3
120
36
18
Vdc
Vdc
°C
°C
Vdc
Vdc
Vdc
Vdc
Vdc
A
mA
mA
A
2
s
mA
dB
Vdc
mV
mV
mV
V
mV
mV
A
%
100ms
Refer to Fig.20 for measuring point
-40
-55
18
15.5
100% Load, 18Vin
24
2
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=18V to 36V
Tc=-40°C to 100°C
over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF Low ESR cap
Full Load, 1µF ceramic, 10µF Low ESR cap
Output Voltage 10% Low
24V, Tested with a aluminum ,10µF Low ESR cap
and 1µF Ceramic load cap,
ΔIo/Δt=1A/µs
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
28.28
±56
±112
±300
28.75
150
40
12.5
27.25
400
400
300
30
30
mV
mV
us
ms
ms
µF
%
%
2250
2250
500
Vdc
Vdc
Vdc
MΩ
pF
kHz
0.8
15
0.8
15
1
50
+10
0.5
140
V
V
V
V
mA
uA
%
V
%
M hours
grams
°C
Full load; 5% overshoot of Vout at startup
330
90.5
91.0
5000
10
1900
330
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
Across Pins 9 & 5, Pout
≦
max rated power
Pout
≦
max rated power
Over full temp range; % of nominal Vout
Io=80% of Io, max; Ta=25°C
Refer to Fig.20 for measuring point
0
0
-40
115
2.19
62
120
H24SN28012_07272006
2
ELECTRICAL CHARACTERISTICS CURVES
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.
Figure 3:
Input current vs. output current at low line, nominal
line, and high line.
Figure 4:
Typical input characteristics at room temperature
H24SN28012_07272006
3
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
Figure 5:
Turn-on transient at full rated load current (resistive
load) (5ms/div). CH2: Vout; 10V/div; CH3: ON/OFF input:
5V/div
Figure 6:
Turn-on transient at minimum load current
(5ms/div). CH2: Vout: 10V/div; CH3: ON/OFF input: 5V/div
H24SN28012_07272006
4
ELECTRICAL CHARACTERISTICS CURVES
Figure 7:
Output voltage response to step-change in load
current (75%-50% of Io, max; di/dt = 1A/µs). Load cap: 330µF
aluminum ,10uF Low ESR capacitor and 1µF ceramic
capacitor. Top Trace: Vout (100mV/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 8:
Output voltage response to step-change in load
current (50%-75% of Io, max; di/dt = 1A/µs). Load cap: 330µF
aluminum,10uF Low ESR capacitor and 1µF ceramic capacitor.
Top Trace: Vout (100mV/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:
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. Measure current as shown above.
H24SN28012_07272006
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