Murata HPQ-3.3/50-D48PY Isolated high power quarter brick dc/dc converter Datasheet

HPQ Series
www.murata-ps.com
Isolated High Power Quarter Brick DC/DC Converters
Typical unit
FEATURES
PRODUCT OVERVIEW
„
3.3 Volts DC fixed output up to 50 Amps
„
Industry standard quarter brick 2.3" x 1.45" x
0.39" open frame package
„
Wide range 36 to 75 Vdc input voltages with 2250
Volt Basic isolation
„
Double lead-free assembly and attachment for RoHS
standards
„
Up to 165 Watts total output power
nverters, the
Unique among quarter-brick DC/DC converters,
rent (up to
HPQ series offers very high output current
50 Amps) in an industry standard “quarter brick”
package requiring no heat sink. The HPQ series
delivers up to 165 Watts fixed voltage output for
printed circuit board mounting. Wide range inputs
on the 2.3" x 1.45" x 0.39" converter are 36 to 75
Volts DC (48 Volts nominal), ideal for datacom and
telecom systems. The fixed output voltage is regulated to within ±1% and may be trimmed within
±10% of nominal output.
Advanced automated surface mount assembly
and planar magnetics deliver full magnetic and
optical isolation with Basic protection up to 2250
Volts. To power digital systems, the outputs offer
fast settling to current steps and tolerance of
higher capacitive loads. Excellent ripple and noise
specifications assure compatibility to CPU’s, ASIC’s,
programmable logic and FPGA’s. No minimum load
is required. For systems needing controlled startup/
„
High efficiency synchronous rectifier topology
„
Stable no-load operation with no required external
components
„
Operating temperature range -40 to +85° C. with
no heat sink required
„
Designed to meet UL/EN 60950-1, CSA-C22.2 No.
60950-1, safety approvals
„
Extensive self-protection, current limiting and shut
down features
shutdown, an external remote On/Off ccontrol may
use either positive or negative polarity. Remote
Sense inputs compensate for resistive line drops at
high currents.
A wealth of self-protection features avoid problems with both the converter and external circuits.
These include input undervoltage lockout and
overtemperature shutdown using an on-board temperature sensor. Excessive overcurrents limit their
power using the “hiccup” autorestart technique
and the outputs may be short-circuited indefinitely.
Additional safety features include output overvoltage protection and reverse conduction elimination.
The synchronous rectifier topology offers high efficiency for minimal heat buildup and “no heat sink”
operation. The HPQ series is designed to meet full
safety certifications to UL/EN/IEC/CSA 60950-1 and
RFI/EMI conducted/radiated emission compliance
to FCC part 15 class B.
APPLICATIONS
„
Embedded systems, datacom and telecom
installations
„
Disk farms, data centers and cellular repeater sites
„
Remote sensor systems, dedicated controllers
„
Instrumentation systems, R&D platforms, automated test fixtures
„
Data concentrators, voice forwarding and
speech processing systems
+SENSE
(7)
+VIN
(3)
+VOUT
(8)
SWITCH
CONTROL
−VOUT
(4)
–VIN
(1)
PULSE
TRANSFORMER
PWM
CONTROLLER
REMOTE
ON/OFF
CONTROL
(2)
OPTO
ISOLATION
INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS
REFERENCE &
ERROR AMP
−SENSE
(5)
VOUT TRIM
(6)
Figure 1. Simplified Schematic
Typical topology is shown
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 1 of 10
HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
ORDERING GUIDE ➀
Output
Input
R/N (mV
pk-pk)
IOUT
VOUT (Amps, Power
(Volts) max.) (Watts) Typ. Max.
Root Model ➀
HPQ-3.3/50-D48N-C
3.3
50
165
50
Regulation
(Max.) ➁
Line
IIN full
VIN Nom. Range
IIN no
load
Load (Volts) (Volts) load (mA) (Amps)
100 ±0.2% ±0.2%
48
36-75
80
3.82
Efficiency
Package
Min.
Typ.
Dimensions
(inches)
88%
90%
1.45x2.3x0.39
Dimensions
(mm)
Pinout
36.8x58.4x9.9
P32
➀ Please refer to the part number structure for additional ordering information and options.
➁ All specifications are at nominal line voltage and full load, +25 deg.C. unless otherwise noted. See detailed specifications. Output capacitors are 1 μF ceramic || 10 μF electrolytic with no input caps.These
caps are necessary for our test equipment and may not be needed for your application.
1.860 (47.2)
B
MECHANICAL SPECIFICATIONS
B
A
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
1.45
(36.8)
1.00
(25.4)
Screw length
must not
go through
baseplate.
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
BASEPLATE
#M3-THREAD X 0.15 DEEP
TYPICAL (4) PLACES
Optional baseplate
0.50 (12.7)
With Baseplate
0.40 (10.2)
Without Baseplate
0.015 (0.4)
min. clearance
between highest
component and
pin shoulders
Function P32
Neg. Input
Remote On/Off Control
Pos. Input
Neg. Output
Pin
5
6
7
8
Function P32
Neg. Sense
Output Trim
Pos. Sense
Pos. Output
Important! Always connect the sense pins. If they are not
connected to a remote load, wire each sense pin to its
respective voltage output at the converter pins.
2.30 (58.4)
Component locations
are typical and may
vary between models.
A
2.00 (50.8)
A
B
Pin
1
2
3
4
0.18
(4.6)
PINS 1-3, 5-7: 0.040 ±0.001 (1.016 ±0.025)
PINS 4 & 8: 0.060 ±0.001 (1.52 ±0.025)
I/O Connections (pin side view)
1
1.30
(33.0)
4
5
6
7
8
2
3
0.600 (15.2)
4 EQ. SP.
@ 0.150 (3.8)
Optional mounting
holes, 4 places
2.15 (54.6)
BOTTOM VIEW
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 2 of 10
HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
PART NUMBER STRUCTURE
HPQ - 3.3 / 50 - D48 N B
H LX - C
RoHS Hazardous Materials compliance
C = RoHS-6 (no lead), standard
Y = RoHS-5 (with lead), optional, special quantity order
Family
Series:
High Power
Quarter Brick
Pin length option
Blank = standard pin length 0.180 in. (4.6 mm)
L1 = 0.110 in. (2.79 mm)*
L2 = 0.145 in. (3.68 mm)*
*Special quantity order required
Nominal Output Voltage
Conformal coating (optional)
Blank = no coating, standard
H = Coating added, optional, special quantity order
Maximum Rated Output :
Current in Amps
Input Voltage Range:
D48 = 36-75 Volts (48V nominal)
Baseplate (optional)
Blank = No baseplate, standard
B = Baseplate installed, optional quantity order
On/Off Control Polarity
N = Negative polarity, standard
P = Positive polarity, optional
Note: Some model combinations may not be
available. Contact Murata Power Solutions for
availability.
Performance and Functional Specifications
All specifications are typical unless noted. See Note 1.
Input
Input Voltage Range
See Ordering Guide.
Recommended External Fuse
10 Amps
Start-Up Voltage
33.0 Volts
Undervoltage Shutdown
32.0 Volts
Overvoltage Shutdown
None, see application notes.
Reflected (Back) Ripple Current (Note 2)
Internal Input Filter Type
20 mA pk-pk
Pi-type
Reverse Polarity Protection (Note 15)
See fuse information
Input Current:
Full Load Conditions
See Ordering Guide.
0.05 A2Sec.
Inrush Transient
Shutdown Mode (Off, UV, OT)
10 mA
Output Short Circuit
50 mA
No Load, 3.3Vout
80 mA
Low Line (Vin=Vmin, 3.3Vout)
5.21 Amps
Remote On/Off Control (Note 5)
Positive Logic (“P” suffix)
ON = +2.5 V. to +15 V. max. or open pin
OFF = 0 to +1 V. max. or ground pin
Negative Logic (“N” suffix)
ON = -0.1 V. to +0.8 V. max. or ground pin
OFF = +2.5 V. to +15 V. max. or open pin
Current
1 mA
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 3 of 10
HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
Output
Minimum Loading
No minimum load
Maximum Output Power
166.6 Watts
Accuracy (50% load)
±1 % of Vsetting. See note 16.
Overvoltage Protection (Note 7)
4 Volts
Temperature Coefficient
±0.02% per °C. of Vout range
Ripple/Noise (20 MHz bandwidth)
See Ordering Guide and note 8.
Line/Load Regulation (See Tech. Notes)
See Ordering Guide and note 10.
Efficiency
See Ordering Guide
Remote Sense Compensation
+10% max. deviation from output
Maximum Capacitive Loading, low ESR
Current Limit Inception (98% of Vout setting)
10,000 μF max. See note 11.
59 Amps (after warm up) See note 12.
Short Circuit Mode (Notes 6, 12)
Short Circuit Current Output
5 Amps
Protection Method
Hiccup autorecovery upon overload removal. (See note 12)
Short Circuit Duration
Continuous, no damage (output shorted to ground)
Isolation
Isolation Voltage
Input to Output
2250 Vdc min.
Input to Baseplate
1500 Vdc min.
Baseplate to Output
1500 Vdc min.
Isolation Resistance
10 Megohms
Isolation Capacitance
1000 pF
Isolation Safety Rating
Basic insulation
Dynamic Characteristics
Dynamic Load Response
200 μSec to within ±1% of final value. (50-75-50% load step)
Turn-On Time
10 mSec for Vout regulated
Remote On/Off Time
10 mSec for Vout regulated
Switching Frequency
400 ±40 KHz
Environmental
Calculated MTBF (Note 4)
TBC
Operating Temperature Range (no baseplate)
Maximum Baseplate Operating Temperature
Storage Temperature Range
-40 to +85 °C (with derating)
+100 °C
-55 to +125 °C
Thermal Protection/Shutdown
(Case temp. is measured in the center)
Relative Humidity
+115 °C
85%/+85 °C
Physical
Outline Dimensions
See Mechanical Specifications
Weight
1.06 ounces (30 grams)
Electromagnetic Interference
(may require external filter)
FCC Part 15, EN55022, Class B, conducted and radiated
UL/cUL 60950-1
CSA-C22.2 No. 60950-1
IEC/EN 60950-1
Safety (designed to meet)
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 4 of 10
HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
Absolute Maximum Ratings
Input Voltage
Continuous or transient
75 Volts max.
Output Power
166.6 Watts max.
On/Off Control
0V. min. to +15 V. max.
Input Reverse Polarity Protection
See Fuse section
Current-limited.
Devices can withstand sustained short circuit without damage.
Output Current
Storage Temperature
-55 to +125 °C
Lead Temperature
See soldering guidelines.
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied nor recommended.
CAUTION: This product is not internally fused. To comply with safety agency certifications and to avoid injury to personnel or equipment, the user must supply an external slow-blow fuse to the input terminals. See
fuse information.
Specification Notes
(1) All models are tested and specified with external 1||10 μF output capacitors and no external input capacitor. All capacitors are low ESR types. These capacitors are necessary to accommodate our test equipment
and may not be required to achieve specified performance in your applications. All models are stable and regulate within spec under no-load conditions.
All specifications are typical unless noted. General conditions for Specifications are +25 °C, Vin=nominal, Vout=nominal, full load. Adequate airflow must be supplied for extended testing under power.
(2) Reflected Input Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering is Cin=33 μF, 100V, Cbus=220 μF, 100V electrolytic, Lbus=12 μH.
(3) Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current outputs if the total
RMS current over time does not exceed the Derating curve. All Derating curves are presented at sea level altitude. Be aware of reduced power dissipation with increasing density altitude.
(4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fixed conditions, Tpcboard=+25 °C, full output load, natural air convection.
(5) The On/Off Control is normally controlled by a switch, relay or open collector or open drain transistor. But it may also be driven with external logic or by applying appropriate external voltages which are referenced to Input Common.
(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting.
(7) The outputs are not intended to sink appreciable reverse current. This may damage the outputs.
(8) Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise Reduction.
(9) All models are fully operational and meet published specifications, including “cold start” at –40 °C. Maximum power requires that the package temperature of all on-board components must never exceed +128°C.
(10) Regulation specifications describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme.
(11) The converter is normally specified with the Input/Output filtering listed in Note 1. Higher capacitive load will reduce noise but at the expense of delayed settling time, extended turn-on time and slower transient
response. Use only as much output filtering as needed and no more. Thoroughly test your system under full load with all components installed. Low ESR capacitors with high capacitance may degrade dynamic
performance.
(12) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. If the overcurrent condition still exists, the restart current will be removed and then tried again. This short
current repeating pulse prevents overheating and damaging the converter. Output current limit and short circuit protection is non-latching. Once the fault is removed, the converter immediately recovers normal
operation.
(13) Do not exceed maximum power specifications when adjusting the output trim.
(14) At zero output current, the output may contain low frequency components which exceed the ripple specification. The output may be operated indefinitely with no load.
(15) Input Fusing: If reverse polarity is accidentally applied to the input, a body diode will become forward biased and will conduct considerable current. To ensure reverse input protection, always connect an external
input slow-blow fuse in series with the +Vin input. Use approximately twice the full input current rating with nominal input voltage.
(16) Output accuracy is dependent on user-supplied trim resistors. To achieve high accuracy, use ±1% or better tolerance metal-film resistors.
(17.) Always connect the sense pins. If they are not connected to a remote load, wire each sense pin to its respective voltage output at the converter pins.
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Be cautious when there is high atmospheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). Your production
environment may differ; therefore please thoroughly review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted products (THMT)
For Sn/Ag/Cu based solders:
For Sn/Pb based solders:
Maximum Preheat Temperature
115° C.
Maximum Preheat Temperature
105° C.
Maximum Pot Temperature
270° C.
Maximum Pot Temperature
250° C.
Maximum Solder Dwell Time
7 seconds
Maximum Solder Dwell Time
6 seconds
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 5 of 10
HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
Technical Notes
Removal of Soldered Converters from Printed Circuit Boards
Should removal of the converter from its soldered connection be needed,
thoroughly de-solder the pins using solder wicks or de-soldering tools. At no
time should any prying or leverage be used to remove boards that have not
been properly de-soldered first.
ductor capacitors (www.sanyo.com) can be especially effective for further
reduction of ripple/noise.
The most effective combination of external I/O capacitors will be a function
of line voltage and source impedance, as well as particular load and layout
conditions.
Start-Up Threshold and Undervoltage Shutdown
These converters must be driven from a low ac-impedance input source. The
DC/DC’s performance and stability can be compromised by the use of highly
inductive source impedances. The input circuit shown in Figure 2 is a practical
solution that can be used to minimize the effects of inductance in the input
traces. For optimum performance, components should be mounted close to the
DC/DC converter.
Under normal start-up conditions, these converters will not begin to regulate
properly until the ramping input voltage exceeds the Start-Up Threshold. Once
operating, devices will turn off when the applied voltage drops below the Undervoltage Shutdown point. Devices will remain off as long as the undervoltage
condition continues. Units will automatically re-start when the applied voltage
is brought back above the Start-Up Threshold. The hysteresis built into this
function avoids an indeterminate on/off condition at a single input voltage. See
Performance/Functional Specifications table for actual limits.
I/O Filtering, Input Ripple Current, and Output Noise
Start-Up Time
All models in this Series are tested/specified for input ripple current (also called
input reflected ripple current) and output noise using the circuits and layout
shown in Figures 2 and 3. External input capacitors (CIN in Figure 2) serve
primarily as energy-storage elements.
The VIN to VOUT Start-Up Time is the interval between the point at which a ramping input voltage crosses the Start-Up Threshold voltage and the point at which
the fully loaded output voltage enters and remains within its specified accuracy
band. Actual measured times will vary with input source impedance, external
input capacitance, and the slew rate and final value of the input voltage as it
appears to the converter. The On/Off to VOUT start-up time assumes that the
converter is turned off via the Remote On/Off Control with the nominal input
voltage already applied.
Input Source Impedance
They should be selected for bulk capacitance (at appropriate frequencies), low
ESR, and high rms-ripple-current ratings. The switching nature of
DC/DC converters requires that dc voltage sources have low ac impedance as
highly inductive source impedance can affect system stability. In Figure 2, CBUS
and LBUS simulate a typical dc voltage bus. Your specific system configuration
may necessitate additional considerations.
In critical applications, output ripple/noise (also referred to as periodic and random deviations or PARD) can be reduced below specified limits using filtering
techniques, the simplest of which is the installation of additional external output capacitors. Output capacitors function as true filter elements and should be
selected for bulk capacitance, low ESR, and appropriate frequency response.
In Figure 3, the two copper strips simulate real-world pcb impedances between
the power supply and its load. Scope measurements should be made using
BNC connectors or the probe ground should be less than ½ inch and soldered
directly to the fixture.
All external capacitors should have appropriate voltage ratings and be located
as close to the converter as possible. Temperature variations for all relevant
parameters should be taken into consideration. OS-CONTM organic semicon-
On/Off Control
The primary-side, Remote On/Off Control function can be specified to operate
with either positive or negative polarity. Positive-polarity devices ("P" suffix)
are enabled when the on/off pin is left open or is pulled high. Positive-polarity
devices are disabled when the on/off pin is pulled low (with respect to –Input).
Negative-polarity devices are off when the on/off pin is high and on when the
on/off pin is pulled low. See Figure 4.
Dynamic control of the remote on/off function is best accomplished with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if
appropriate). The drive circuit should be able to sink appropriate current (see
Performance Specifications) when activated and withstand appropriate voltage
when deactivated.
+SENSE
+OUTPUT
TO
OSCILLOSCOPE
CBUS
COPPER STRIP
8
C1
3
C2
SCOPE
RLOAD
+INPUT
4
LBUS
+
VIN
CURRENT
PROBE
7
–OUTPUT
5
CIN
–SENSE
–
1
–INPUT
See specs for component values.
Figure 2. Measuring Input Ripple Current
www.murata-ps.com
COPPER STRIP
C1 = 1μF CERAMIC
C2 = 10μF TANTALUM
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 3. Measuring Output Ripple/Noise (PARD)
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 6 of 10
HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
Sense Input
Note: The sense and VOUT lines are internally connected through low-value resistors. Nevertheless, if sense is not used for remote regulation, the user must
connect + sense to + VOUT and -sense to -VOUT at the converter pins. Sense is
intended to correct small output accuracy errors caused by the resistive ohmic
drop in output wiring as output current increases. This output drop (the difference between Sense and VOUT when measured at the converter) should not be
allowed to exceed 0.5V.
Sense is connected at the load and corrects for resistive errors only. Be careful
where it is connected. Any long, distributed wiring and/or significant inductance
introduced into the Sense control loop can adversely affect overall system stability. If in doubt, test the application, and observe the DC/DC’s output transient
response during step loads. There should be no appreciable ringing or oscillation. You may also adjust the output trim slightly to compensate for voltage loss
in any external filter elements. Do not exceed maximum power ratings.
Current Limiting
When power demands from the output falls within the current limit inception
range for the rated output current, the DC/DC converter will go into a current
limiting mode. In this condition the output voltage will decrease proportionately
with increases in output current, thereby maintaining a somewhat constant power
dissipation. This is commonly referred to as power limiting. Current limit inception
is defined as the point where the full-power output voltage falls below the specified
tolerance. If the load current being drawn from the converter is significant enough,
the unit will go into a short circuit condition. See “Short Circuit Condition.”
temperature (See Performance Specifications), a precision temperature sensor
will power down the unit. When the internal temperature decreases below the
threshold of the temperature sensor, the unit will self start.
Output Overvoltage Protection
The output voltage is monitored for an overvoltage condition via magnetic coupling
to the primary side. If the output voltage rises to a fault condition, which could be
damaging to the load circuitry (see Performance Specifications), the sensing circuitry will power down the PWM controller causing the output voltage to decrease.
Following a time-out period the PWM will restart, causing the output voltage to
ramp to its appropriate value. If the fault condition persists, and the output voltages again climb to excessive levels, the overvoltage circuitry will initiate another
shutdown cycle. This on/off cycling is referred to as “hiccup” mode.
Input Reverse-Polarity Protection
If the input-voltage polarity is accidentally reversed, an internal diode will become forward biased and likely draw excessive current from the power source.
If the source is not current limited or the circuit appropriately fused, it could
cause permanent damage to the converter.
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of a sustained, non-current-limited, input-voltage polarity
reversal exists. For these converters, slow-blow fuses are recommended with
values no greater than twice the maximum input current.
Short Circuit Condition
Trimming Output Voltage
When a converter is in current limit mode the output voltages will drop as the
output current demand increases. If the output voltage drops too low, the magnetically coupled voltage used to develop primary side voltages will also drop,
thereby shutting down the PWM controller. Following the specified time-out
period, the PWM will restart, causing the output voltages to begin ramping to their
appropriate values. If the short-circuit condition persists, another shutdown
cycle will be initiated. This on/off cycling is referred to as “hiccup” mode. The
hiccup cycling reduces the average output current, thereby preventing internal
temperatures from rising to excessive levels. This converter is capable of
enduring an indefinite short circuit output condition.
These converters have a trim capability that enables users to adjust the output
voltage over a limited range (refer to the trim equations). Adjustments to the output voltage can be accomplished with a single fixed resistor as shown in Figures
5 and 6. A single fixed resistor can increase or decrease the output voltage
depending on its connection. Resistors should be located close to the converter
and have TCR’s less than 100ppm/°C to minimize sensitivity to changes in
temperature. If the trim function is not used, leave the trim pin open.
Standard units have a “positive trim” where a single resistor connected from
the Trim pin to the +Sense will increase the output voltage. A resistor connected from the Trim Pin to the –Sense will decrease the output voltage.
Thermal Shutdown
These converters are equipped with thermal-shutdown circuitry. If the internal
temperature of the DC/DC converter rises above the designed operating
).054
%15)6!,%.4 #)2#5)4 &/2
0/3)4)6% !.$ .%'!4)6%
,/')# -/$%,3
6
/./&&
#/.42/,
#/.42/,
n).054
Temperature/power derating is based on maximum output current and voltage
at the converter’s output pins. Use of the trim and sense functions can cause
output voltages to increase, thereby increasing output power beyond the
converter’s specified rating, or cause output voltages to climb into the output
overvoltage region. Therefore:
(VOUT at pins) x (IOUT) d rated output power
2%&
Trim adjustments greater than the specified trim range can have an adverse
affect on the converter’s performance and are not recommended. Excessive
voltage differences between VOUT and Sense, in conjunction with trim adjustment of the output voltage, can cause the overvoltage protection circuitry to
activate (see Performance Specifications for overvoltage limits).
#/--/.
The Trim pin is a relatively high impedance node that can be susceptible to
noise pickup when connected to long conductors in noisy environments.
Figure 4. Driving the Remote On/Off Control Pin
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 7 of 10
HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
1
+OUTPUT
–INPUT
+SENSE
2
TRIM
+OUTPUT
–INPUT
+SENSE
7
2
ON/OFF
CONTROL
6
LOAD
ON/OFF
CONTROL
TRIM
–SENSE
5
3
+INPUT
–OUTPUT
4
8
7
6
LOAD
RTRIM DOWN
RTRIM UP
–SENSE
3
1
8
+INPUT
–OUTPUT
5
4
Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors
Figure 5. Trim Connections To Increase Output Voltages Using Fixed Resistors
Trim Up
Trim Down
HPQ-3.3/50-D48
RT UP (k7) =
16.863(1+)
1.225x
5.11
–
–10.22
RTDOWN (k7) =
5.11
–10.22
where is the absolute value of
3.3 - VOUT
(
)
3.3
( is always positive)
TYPICAL PERFORMANCE CURVES
HPQ-3.3/50-D48
HPQ-3.3/50-D48
Efficiency vs Line Voltage and Load Current @ +25°C
Maximum Current Temperature Derating
(Vin=48V, no baseplate, longitudinal air flow)
95
24
50
22
90
18
14
12
40
10
75
8
Power Dissipation
VIN = 48 V
70
6
4
65
2
5
10
15
20
25
30
35
40
45
Output Current (Amps)
80
16
Loss (Watts)
VIN = 75 V
VIN = 48 V
VIN = 36 V
85
Efficiency (%)
45
20
35
100 LFM
200 LFM
300 LFM
400 LFM
30
25
20
15
50
Load Current (Amps)
10
30
40
50
60
70
80
Ambient Temperature (°C)
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 8 of 10
HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
Transient Response
Transient Response (25% Load Step)
Transient Response (50% Load Step)
Enable Start-up
Enable Start-up (Vin=48V Iout=50A)
Enable Start-up (Vin=48V Iout=0A)
Ripple and Noise (1uF Ceramic plus 10uF Tantalum)
Ripple Waveform (Vin=48V Iout=50A)
Ripple Waveform (Vin=48V Iout=0A)
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 9 of 10
HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: [email protected] ISO 9001 and 14001 REGISTERED
06/02/08
03/05/09
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2009 Murata Power Solutions, Inc.
www.murata-ps.com
USA:
Mansfield (MA), Tel: (508) 339-3000, email: [email protected]
Canada:
Toronto, Tel: (866) 740-1232, email: [email protected]
UK:
Milton Keynes, Tel: +44 (0)1908 615232, email: [email protected]
France:
Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: [email protected]
Germany:
München, Tel: +49 (0)89-544334-0, email: [email protected]
Japan:
Tokyo, Tel: 3-3779-1031, email: [email protected]
Osaka, Tel: 6-6354-2025, email: [email protected]
China:
Shanghai, Tel: +86 215 027 3678, email: [email protected]
Guangzhou, Tel: +86 208 221 8066, email: [email protected]
Singapore:
Parkway Centre, Tel: +65 6348 9096, email: [email protected]
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPQ Series.A07 Page 10 of 10
Similar pages