POWER
GENERAL
HD1-300 Series
SINGLE OUTPUT 60A DC-DC CONVERTERS
— 36-75V Input, 3.3V or 5V Output —
Features
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Tightly Regulated 3.3V or 5V Output
36-75 VDC Input (48V Nominal)
Up to 300W Continuous Output Power
No Minimum Load Requirement
High Efficiency
Built-in EMI Suppression
Remote On/Off
Fixed Operating Frequency
Fast Transient Response
Power Good Signal
Frequency Synchronization
Under-Voltage Lockout
Over-Voltage Shutdown
Short-Circuit Protection
Thermal Protection
Industry Standard Full Brick Package
Optional Installed Heat Sinks
Two-Year Warranty
1 Million Hour MTBF
HD1-300 Characteristics
Input Voltage............................................................
EMI Suppression .....................................................
Isolation Voltage ......................................................
Continuous Output Power .......................................
DC Output................................................................
Base-Plate Temperature..........................................
Output Voltage Adjustment ......................................
Short-Circuit Protection ...........................................
Under-Voltage Protection ........................................
Over-Voltage Protection ..........................................
Transient Response.................................................
Frequency of Operation...........................................
Design Topology ......................................................
Remote Shutdown ...................................................
Power Good Signal .................................................
Operating Temperature Range................................
Temperature Coefficient ..........................................
Relative Humidity ....................................................
36-75 VDC (48V, nominal).
Pi input filter, standard.
1500V, input to output, for one minute.
Total output power should not exceed 200W for model HD1-300-3D
or 300W for model HD1-300-5D.
See Electrical Characteristics table.
+100°C, maximum (Note 2): Thermal shutdown circuitry with auto-
matic recovery.
Adjustable by ±10%.
Continuous cycle-by-cycle current limiting with automatic recovery.
Lockout activated at 34V- 35.5V input; automatic recovery with 2V-
3V hysteresis (typical).
HD1-300-3D, shutdown at 3.9V, typical; HD1-300-5D, shutdown at
6.5V, typical;
RESET
at V
IN
= 0V.
200 µs recovery after half-load to full load step change to within 1%
of the regulation band with no more than 5% deviation.
400 kHz, fixed.
Forward converter.
CMOS and open-collector TTL compatible. Choice of active high or
active low
ENABLE
: See following table for control conditions.
TTL
HIGH
= V
OUT
within tolerance.
-40°C to +100°C (base plate).
±0.02%/°C over the operating temperature range.
0% to 95%, non-condensing.
POWER GENERAL
A Division of Nidec America Corporation
152 Will Drive · Canton, MA 02021 USA · Phone 781-828-6216 · Fax 781-830-1155 · Email power@nidecpg.com · http://www.nidec.com
POWER GENERAL
HD1-300 Characteristics
(Continued)
Relative Humidity ....................................................
Altitude ....................................................................
Storage Temperature Range...................................
Storage Humidity.....................................................
Mean Time Between Failures .................................
HD1-300 Series
0% to 95%, non-condensing.
0 to 10,000 feet.
-40°C to +100°C.
0% to 95%, non-condensing.
>1,000,000 hours, calculated (ground benign, T
A
= +40°C).
Electrical Characteristics
Output Output Current Input
Output
Voltage
Min. Max. Current Voltage
Model Number (V)
(A)
(A)
(A)
Tolerance
HD1-300-3D
HD1-300-5D
Notes
1. Use of an external input line fuse is recommended: Use a 10A/125V slow-blow fuse.
2. For uncompromised operation, the base-plate temperature of HD1-300 must be kept below the maximum of +100°C.
Good engineering practice in observation of that limit, including use of auxiliary heat sinks or forced air cooling, is
entirely the responsibility of the user.
3. All measurements are at nominal input, full load, and +25°C, unless otherwise specified
4. Ripple and noise figures are maximum values. See application note below.
5. Peak-to-peak and RMS metering equipment must have a 20 MHz frequency response with probes and cables that
maintain a frequency response of 20 Hz to 20 MHz. Output ripple and spikes are measured directly at the output
terminals of the converter with a 0.1 µF ceramic capacitor. The probe ground band must make direct contact with
the output return or the common terminal of the converter to prevent noise measurement errors.
Ripple
& Noise
4
Line
Load
Efficiency
(mV
pp
)
Regulation Regulation
(Typ.)
100
100
±0.2%
±0.2%
±0.5%
±0.5%
80%
84%
3.3
5.0
0
0
60
60
5.1
7.4
±1.0%
±1.0%
Output Adjustment
Remote On/Off
Model
HD1-300-3D1
HD1-300-3D2
HD1-300-5D1
V
Pin3
*
< = 1.4V
>1.4V to V
IN(MAX)§
< = 1.4V
>1.4V to V
IN(MAX)§
< = 1.4V
>1.4V to V
IN(MAX)§
< = 1.4V
>1.4V to V
IN(MAX)§
Output
Off
On
On
Off
Off
On
On
Off
Ripple/Noise Reduction
In applications with loads between two and three inches from the
HD1-300 module, the circuit board’s trace inductance can be used in
conjunction with a 47 µF, low-ESR capacitor across each load to
lower ripple and noise to 50 mVpp.
HD1-300-5D2
* Reference = -V
IN.
§ Or open.
Model Selection Guide
HD1 - 300 - 3
Series:
High-Density, Single Output,
DC-DC Converters with
Maximum Output Power
Ratings of up to 300W
Output Voltage
3 = 3.3V
5 = 5.0V
Input Voltage Range
D = 36-75VDC
(48V Nominal)
D
1 V
Installed Heat Sink
(Optional)
H =Heat Sink Fins Parallel
to the Longest Side of
the HD1-300 Case
V = Heat Sink Fins
Perpendicular to the
Longest Side of the
HD1-300 Case
Remote Shutdown Logic
1 = Off with Pin 3 <=1.4V
2 = Off with Pin 3 >1.4V
(Reference = -V
IN
)
—2—
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