ETC BCP-5-3.3-D48

®
®
INNOVATION and EXCELLENCE
Dual Output
Mixed Voltage, BCP Models
5V and 3.3V, "Half-Brick"
75 Watt, DC/DC Converters
Features
■
Independent 5V and 3.3V outputs
■
Each output fully regulated
■
No minimum load requirements
■
Up to 15 Amps per output
■
75 Watts total output power
■
Standard "half-brick" package
■
UL1950, EN60950 and VDE safety
approvals (BASIC insulation)
■
Fully isolated, 1500Vdc guaranteed
■
18-36V or 36-75V input ranges
■
mark available (75V-input models)
■
Input under and overvoltage shutdown
■
Continuous short-circuit protection
■
Thermal shutdown
As your new, mixed-logic (5V and 3.3V) design evolves and your current requirements change, your new DC/DC converter will not. DATEL’s BCP-5/15-3.3/15-D24
(18-36V input) and BCP-5/15-3.3/15-D48 (36-75V input) are fully isolated DC/DC
converters providing both 5V and 3.3V outputs. Housed in standard "half-brick"
packages (2.3" x 2.4" x 0.525"), the BCP’s can support any combination of 5V and
3.3V loading up to a combined total of 15 Amps. Both outputs are fully isolated
(1500Vdc) and independently line (±0.2%) and load (±0.5% and ±0.6%) regulated.
Both BCP models feature input pi filters, input undervoltage and overvoltage
shutdown, input reverse-polarity protection, output overvoltage protection, current
limiting, and thermal shutdown. Each has an on/off control function, or an optional
sync capability and the two output voltages can be trimmed independently.
BCP Model DC/DC’s deliver low noise (50mVp-p), high efficiency (87%) and are
fully specified for –40 to +100°C operation. Utilization of metal baseplate technology
with threaded inserts permits easy heat-sink attachment and/or pcb mounting. These
devices meet IEC950, UL1950, EN60950 and VDE safety standards, including
BASIC insulation requirements. CB reports are available on request. "D48" models
are CE marked (meet the requirements of LVD).
+5V OUTPUT
+INPUT
SWITCH
CONTROL
5V RETURN
+3.3V OUTPUT
–INPUT
3.3V RETURN
MAG AMP
CONTROLLER
ON/OFF
CONTROL
(SYNC)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
REFERENCE &
ERROR AMP
3.3V TRIM
5V TRIM
UV & OV
COMPARATORS
Figure 1. Simplified Schematic
DATEL, Inc., Mansfield, MA 02048 (USA) · Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 · Email: [email protected] · Internet: www.datel.com
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
XCP Series
Performance Specifications and Ordering Guide
Model
➀
Input
Output
R/N (mVp-p)
Regulation (Max.)
VOUT
(Volts)
IOUT ➄
(Amps)
Typ.
Max.
Line
Load ➂
5
15
50
100
±0.2%
±0.5%
3.3
15
50
100
±0.2%
±0.6%
5
15
50
100
±0.2%
±0.5%
3.3
15
50
100
±0.2%
±0.6%
BCP-5/15-3.3/15-D24
BCP-5/15-3.3/15-D48
➀ Typical at TA = +25°C under nominal line voltage and balanced "full-load" (5V @7.5A, 3.3V @ 7.5A)
conditions unless otherwise noted.
➁ Ripple/Noise (R/N) measured over a 20MHz bandwidth. All models are specified with 22µF, low-ESR,
input capacitor and 10µF tantalum in parallel with 1µF ceramic output capacitors.
➂
➃
➄
➅
➅
VIN Nom.
(Volts)
Range
(Volts)
IIN ➃
(mA)
Min.
Typ.
Package
(Case,
Pinout)
24
18-36
215/3720
84%
87.2%
C19, P29
48
36-75
125/1860
84%
88%
C19, P29
Efficiency
No load to 100% load, other output at no-load.
Nominal line voltage, no-load/5V at full-load condition.
Current from either output at maximum value, or both outputs to a combined total of 15 A.
5V at full-load condition.
PA R T N U M B E R S T R U C T U R E
Part Number Suffixes
BCP - 5 / 15 - 3.3 / 15 - D24 N
Dual Output/
Standard Half-Brick Package
Add "N" or "S" suffix as desired
Input Voltage Range:
D24 = 18-36 Volts (24V nominal)
D48 = 36-75 Volts (48V nominal)
V1 Nominal Output Voltage: 5 Volts
I1 Maximum Output Current: 15A
I2 Maximum Output Current: 15A
BCP 75 Watt DC/DC's are designed so an On/Off Control function,
with either positive polarity (no suffix) or negative polarity ("N"suffix),
or a Sync function ("S" suffix) can be added in the pin 3 position.
No Suffix On/Off Control function (positive polarity) on pin 3
N
On/Off Control function (negative polarity) on pin 3
S
Sync function on pin 3
V2 Nominal Output Voltage: 3.3 Volts
M E C H A N I C A L S P E C I F I C AT I O N S
Optional Heat Sink (Part Number HS-CPLP2)
3.50
(88.90)
2.30
(58.42)
0.545 (13.84) MAX.
0.525 (13.34) TYP.
2.000
(50.80)
METAL BASEPLATE
0.75
(19.05)
0.20
(5.08)
Case C19
PLASTIC SHELL
0.040 ±0.002 DIA.
(1.016 ±0.051)
0.20 MIN
(5.08)
1.900
(48.26)
2.30
(58.42)
0.20
(5.08)
1.900
(48.26)
10
1
9
0.140 THRU AND COUNTERSINK
90˚ TO 0.26 (4 PLACES)
2
8
2.000 1.400
(50.80) (35.56)
1.000
(25.40)
2.40
1.600
1.300 (40.64) (60.96)
1.000 (33.02)
(25.40)
7
3
0.400
(10.16)
6
4
(4) THREADED INSERTS
#M3 THD THRU
0.300
(7.62)
2.48
(62.99)
5
0.200
(5.08)
0.30
(7.62)
BOTTOM VIEW
MATERIAL: BLACK ANODIZED ALUMINUM
0.20
(5.08)
Optional Heat Sink (Part Number HS-CP)
0.50 (12.70) TYP.
051 (12.95) MAX.
2.30
(58.42)
I/O Connections
Pin Function P29
Pin
1
–Input
6
2 Case (Baseplate)
7
3
On/Off Control
8
4
+Input
9
5
5V Trim
10
0.47
(11.94)
0.16
(4.06)
0.600
(15.24)
Function P29
5V Return
+5V Output
3.3V Trim
3.3V Return
+3.3V Output
2.000
(50.80)
TOP VIEW
0.147 DIA. (3.734)
(4 PLACES)
2
0.10
(2.54)
0.20
(5.08)
1.900
(48.26)
0.20
(5.08)
2.40
(60.96)
MATERIAL: BLACK ANODIZED ALUMINUM
4 MOUNTING SCREWS AND 0.009 (0.229)
THICK THERMAL PAD INCLUDED
BCP Models
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
Performance/Functional Specifications
Output (continued)
Typical @ TA = +25°C under nominal line voltage, balanced "full-load" conditions, unless noted. ➀
Overvoltage Protection: ➁
5V Output
3.3V Output
Input
Input Voltage Range:
D24 Models
D48 Models
18-36 Volts (24V nominal)
36-75 Volts (48V nominal)
Overvoltage Shutdown: ➁
D24 Models
D48 Models
37.5-40.5 Volts (39V typical)
78.8-87.0 Volts (83V typical)
Start-Up Threshold: ➁
D24 Models
D48 Models
15.5-18 Volts (16.5V typical)
33.5-36 Volts (34.4V typical)
Undervoltage Shutdown: ➁
D24 Models
D48 Models
Magnetic feedback, latching
6.8 volts
4.5Volts
Dynamic Characteristics
Dynamic Load Response:
5V (50-100% load step to 1% VOUT)
3.3V (50-100% load step to 1% VOUT)
450µsec maximum
450µsec maximum
Start-Up Time: ➁
VIN to VOUT
On/Off to VOUT
30msec maximum
20msec maximum
Switching Frequency
350kHz (±35kHz)
Environmental
Input Current:
Normal Operating Conditions
Minimum Input Voltage:
D24 Models
D48 Models
Standby Mode:
Off, OV, UV, Thermal Shutdown
14-16 Volts (15.3V typical)
30.5-33.5 Volts (31.8V typical)
MTBF
D24 Models
D48 Models
Bellcore, ground fixed, controlled
1.49M hours (case @ 50°C)
1.72M hours (case @ 50°C)
See Ordering Guide
Operating Temperature (Ambient):
θ Case to Ambient, No Heatsink
Without Derating
With Derating
6.8°C/Watt
–40 to +45°C (with heat sink)
To +100°C (See Derating Curves)
Case Temperature:
Maximum Allowable
For Thermal Shutdown ➁
+100°C
+100°C minimum, +110°C maximum
Storage Temperature
–40 to +120°C
5.02 Amps maximum
2.51 Amps maximum
17mA typical
Input Reflected Ripple Current:
Source Impedance <0.1Ω
22µF Low-ESR Capacitor
53mArms, 150mAp-p maximum
Input Filter Type
Pi (0.47pF - 4.7µH - 3µF)
Reverse-Polarity Protection: ➁
D24 Models
D48 Models
On/Off Control: (Pin 3) ➁ ➂ ➄
D24 & D48 Models
D24N & D48N" Models
Sync (Option, Pin 3): ➁ ➂ ➄
Input Threshold (Rising Edge Active)
Input Voltage Low
Input Voltage High
Input Resistance
Output High Voltage (100µA load)
Input/Output Pulse Width
Physical
Dimensions
2.3" x 2.4" x 0.525" (58.4 x 61 x 13.3mm)
1 minute duration, 6A maximum
1 minute duration, 4A maximum
Case (Baseplate) Connection ➁
Pin 2
Case/Pin Material
Diallyl phthalate, UL94V-0 rated, aluminum
baseplate; solder-tinned brass pins
On = open or 2.0 - +VIN, IIN = 50µA max.
Off = 0-0.6V, IIN = 1mA max.
On = 0-0.6V, IIN = 1mA max.
Off = open or 2.0 - +VIN, IIN = 50µA max.
Weight
4.2 ounces (118 grams)
Primary to Secondary Insulation Level Basic
➀ Models are specified at "full load" (5V & 3.3V @ 7.5A), with an external 22µF, low-ESR,
input capacitor and 10µF tantalum in parallel with 1µF ceramic output capacitors.
➁ See Technical Notes for details.
➂ Devices may be ordered with opposite polarity (pin 3 open = off), or the On/Off Control
function can be replaced with a sync function. See Part Number Suffixes and Technical
Notes for additional information.
➃ Output noise may be further reduced with the installation of additional external output
capacitors. See Technical Notes.
➄ These signals must be referenced to the input return pin (–VIN).
➅ Demonstrated MTBF available on request.
0.9-1.8 Volts
0-0.8 Volts
2.9-5.0 Volts
35kΩ minimum
2.1-2.8 Volts
200-450nsec
Output
VOUT Accuracy
5V Output
3.3V Output
±2% maximum
±2% maximum
Minimum Loading Per Specification
No load
Ripple/Noise (20MHz BW) ➁ ➃
See Ordering Guide
Absolute Maximum Ratings
Line/Load Regulation
See Ordering Guide
Efficiency
See Ordering Guide and Efficiency Curves
Trim Range ➁
±10% independent
Isolation Voltage:
Input-to-Output
Input-to-Case
Output-to-Case
1500Vdc minimum
1000Vdc minimum
1000Vdc minimum
Isolation Capacitance
470pF
Isolation resistance
100MΩ
Current Limit Inception: ➁
5V @ 98% VOUT (3.3V no-load)
3.3V @ 98% VOUT (5V no-load)
16-20 Amps
16-20 Amps
Short Circuit Current: ➁
Constant current 25A, indefinite
Temperature Coefficient
±0.02% per °C
Input Voltage:
Continuous:
D24 Models
D48 Models
Transient (100msec): D24 Models
D48 Models
Input Reverse-Polarity Protection ➁
D24 Models
D48 Models
Output Overvoltage Protection ➁
3.3V Outputs
5V Outputs
40.5 Volts
87 Volts
50 Volts
100 Volts
Input Current must be limited. 1 minute
duration. Fusing recommended.
6 Amps
4 Amps
3.8 Volts, latching
6.2 Volts, latching
Output Current ➁
Current limited. Devices can withstand
an indefinite output short circuit.
Storage Temperature
–40 to +120°C
Lead Temperature (Soldering, 10 sec.)
+300°C
These are stress ratings. Exposure of devices to 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.
3
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
XCP Series
Start-Up Time
TECHNICAL NOTES
The VIN to VOUT start-up time is the interval between the time at which
a ramping input voltage crosses the turn-on threshold point and the fullyloaded 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.
5V & 3.3V Outputs/Returns
The BCP Series outputs (pins 7 & 10) and returns (pins 6 & 9) are isolated
from the +VIN and –VIN inputs (pins 4 & 1) via a transformer and opto-coupled
transistors.
The +5V Return (pin 6) and +3.3V Return (pin 9) are connected internal
to the DC/DC converter. Though the returns are common within the DC/DC
converter, the regulating control loop for each output is sensed directly at its
respective output and return pins. In order to maintain optimum regulation if
ground plane is not used, it is critical that PC board layouts also return each
output to its corresponding return pin.
The On/Off to VOUT start-up time assumes the converter has its nominal input
voltage applied but is turned off via the On/Off Control. The specification
defines the interval between the time at which the converter is turned on
and the fully loaded output voltage enters and remains within its specified
accuracy band.
Filtering and Noise Reduction
On/Off Control (Standard feature)
All BCP DC/DC Converters achieve their rated ripple and noise specifications
using the external input and output capacitors specified in the Performance/
Functional Specifications table. In critical applications, input/output noise may
be further reduced by installing additional external I/O caps. Input capacitors
should be selected for bulk capacitance, low ESR and high rms-ripple-current
ratings. Output capacitors should be selected for low ESR and appropriate
frequency response. All caps should have appropriate voltage ratings and be
mounted as close to the converters as possible.
The On/Off Control (pin 3) may be used for remote on/off operation. As shown
in Figure 1A, the control pin is referenced to the –Input (pin 1) and will be
pulled to a high state internally. The standard BCP converter (no suffix) is
designed so that it is enabled when the control pin is left open and disabled
when the control pin is pulled low (to less than +0.6V relative to –Input).
Dynamic control of the 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 approximately 1mA for
logic low.
The most effective combination of external I/O capacitors will be a function of
your particular load and layout conditions. Our Applications Engineers will be
pleased to recommend potential solutions and can discuss the possibility of
our modifying a device’s internal filtering to meet your specific requirements.
Contact our Applications Engineering Group for additional details.
The on/off control function is designed such that the converter can be disabled (pin 3 pulled low for no-suffix models) while input power is ramping up
and then "released" once the input has stabilized.
For BCP converters configured with the negative-polarity option on the On/Off
Control pin ("N" suffix added to part number), operation is opposite to that
described above. The converter is disabled when the On/Off Control pin is left
open and enabled when pulled low.
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 sustained, non-current-limited, input-voltage polarity
reversals exists. For DATEL BCP DC/DC Converters, you should use slowblow type fuses with values no greater than the following.
4
3.3V
+INPUT
4
+INPUT
100k
21k
VIN Range
"D24" Models
"D48" Models
Fuse Value
6 Amps
4 Amps
3
3
ON/OFF
CONTROL
ON/OFF
CONTROL
Fuses should be installed in the +Input line.
1
1
–INPUT
Input Overvoltage/Undervoltage Shutdown and Start-Up Threshold
Under normal start-up conditions, devices will not begin to regulate until
the ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V
for "D48" models). Once operating, devices will not turn off until the input
voltage drops below the Undervoltage Shutdown limit (32V for "D48" models).
Subsequent re-start will not occur until the input is brought back up to the
Start-Up Threshold. This built-in hysteresis prevents any unstable on/off
situations from occurring at a single voltage.
Figure 1A. No Suffix
–INPUT
Figure 1B. "N" Suffix
Sync Function (Optional feature)
In critical applications employing multiple switching DC/DC converters, it may
be necessary to intentionally synchronize the switching of selected converters.
The BCP Series offers an optional Sync function ("S" suffix) in place of the
On/Off Control on pin 3. The Sync pin will self-configure as either a slave or
master, depending on the circuit application.
Input voltages exceeding the input overvoltage shutdown specification listed
in the Performance/Functional Specifications will cause the device to shutdown. A built-in hysteresis (2V typical for "D24" models, 4V typical for
"D48" models) will not allow the converter to restart until the input voltage
is sufficiently reduced.
4
BCP Models
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
If the Sync pin detects the appropriate input signal, it will configure itself as a
slave; if no signal is detected, it will generate master Sync pulses.
Short Circuit Condition
As described under "Current Limiting," when the BCP Series DC/DC converter output is subjected to a short circuit condition, the output current will
remain at the Short Circuit Current limit. In this state there is negligible power
dissipated in the load. Therefore, most of the input power is dissipated within
the converter, causing the internal temperature to increase. If this condition
persists, Thermal Shutdown will activate and shutdown the DC/DC converter.
When the internal temperature is sufficiently decreased, the converter will
self-start.
Synchronization of converters requires that the master switching frequency
exceed the slave frequency by a minimum of 60kHz.
At the start of each DC/DC converter switching cycle, an internally generated
200-450ns pulse will be present at the Sync pin. If, however, the unit
receives an external Sync pulse, the DC/DC converter’s switching cycle will
be terminated and a new cycle initiated. Since the master frequency is higher
than the slave switching frequency, the slave cycles are always terminated
prematurely, thereby never allowing internal Synch pulses to be generated.
The external signal’s rising edge initiates the slave Sync process. External
signals must adhere to min./ max. limits stated in Performance/Functional
Specifications.
Thermal Shutdown
The BCP Series is equipped with Thermal Shutdown circuitry. If the internal
temperature of the DC/DC converter rises above the designed operating
temperature, 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.
Operating the BCP series DC/DC converters at higher switching frequencies
via the external Sync function will result in a slight degradation of efficiency.
Contact DATEL for further information.
Input Reverse-Polarity Protection
Output Overvoltage Protection
Upon applying a reverse-polarity voltage to the DC/DC converter, an internal
diode will be forward biased and draw excessive current from the power
source. Therefore, it is required that the input current be limited be either an
appropriately rated input fuse or a current limited power source.
Each voltage output of the BCP Series converter is independently monitored
via an auxiliary winding in the output inductor. If the output voltage
should rise to a level which could be damaging to the load circuitry (see
Performance/Functional Specifications for limits), the overvoltage circuitry will
power down the PWM controller and latch off the DC/DC converter. The
device must now be restarted by powering cycling VIN.
Heat Sinks for BCP Series
DATEL offers two standard heat sinks that can be mounted to the half-brick
package to extend the converter's operating temperature range. Along with
the standard 2.3" x 2.4" x 0.5" (HS-CP) heat sink, DATEL has designed
a low-profile heat sink for height-restricted applications. This new heat sink
(HS-CPLP2) is designed with radiant fins that extend 0.51" beyond either
side of the 2.4" dimension of the BCP package. The convenience of this
design is that the finned extensions protrude only 0.31" below the top surface
of the DC/DC converter, allowing components with a profile height less than
0.215" to be mounted on the pc board below the heat sink. Therefore, while
the surface area of the low-profile heat sink measures 2.3" x 3.5", pcb real
estate is unaffected.
Current Limiting
When output current demands exceed the maximum output current rating by
107% to 133%, the DC/DC converter will go into a current limiting mode.
In this condition the output voltage decreases proportionately as the output
current increases, thereby maintaining a somewhat constant power dissipation—referred to as Power Limiting (see Figure 2). As the load approaches a
short circuit, the output current will continue to increase until it reaches the
rated Short Circuit Current limit.
For optimum thermal performance in a natural convection application, the
low-profile heat sink should be mounted with the fins vertically oriented. Both
models are shipped with 0.009" sellf-adhesive thermal pad and mounting
screws.
BCP-5/15-3.3/15-D24, D48 Current Limiting Characteristics
(Nominal VIN)
6.00
5V Output
6
˚C
WATT
4.00
3.00
5
THERMAL RESISTANCE
4
2.00
3.3V Output
1.00
26
25
24
23.5
22.6
22.4
21.9
20.9
20.3
19.8
19.3
18.8
18.3
17.8
17.2
16.7
16.2
15.7
0
15.2
Output Voltage VOUT (Volts)
5.00
Output Current, IOUT (Amps)
HS-CPLP2
3
HS-CP
2
1
0
0
Figure 2. Current Limiting Characteristics
100
200
300
400
500
600
AIR VELOCITY (FT./MIN.)
HS-CP and HS-CPLP2 Heat Sink Performance Vs. Air Flow
(@ 10.5 Watts Power Dissipation)
5
700
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
XCP Series
Table 1 shows the typical fixed Trim Resistor values for output voltage
changes of 0 through 10%. Trim adjustment greater than 10% can have an
adverse affect on the converter’s performance and is not recommended.
Output Trimming
Both the 5V and 3.3V outputs of the BCP Series can be independently
trimmed via a trimpot (Figure 3A) or a single fixed resistor as shown (Figures
3B & 3C). The trimpot can be used to determine the value of a single fixed
resistor. A single fixed resistor can increase or decrease the output voltage
depending on its connection. Fixed resistors should be metal-film types with
absolute TCR’s less than 100ppm/°C to ensure stability.
+3.3V OUTPUT
3.3V TRIM
1
+5V OUTPUT
4
10
20kΩ
5-22
TURNS
8
–INPUT
3.3V RETURN
+INPUT
5V TRIM
5V RETURN
3.3V
Trim Down
+3.3V
LOAD
9
7
20kΩ
5-22
TURNS
5
+5V
LOAD
6
3.3V
Trim Up
5V
Trim Down
5V
Trim Up
0%
–
–
–
–
1%
47.81k
27.93k
189.75k
61.68k
2%
22.32k
12.78k
91.06k
28.34k
3%
13.82k
7.73k
58.17k
17.23k
4%
9.57k
5.21k
41.72k
11.68k
5%
7.02k
3.69k
31.85k
8.34k
6%
5.320k
2.68k
25.27k
6.12k
7%
4.10k
1.96k
20.57k
4.53k
8%
3.19k
1.42k
17.05k
3.34k
9%
2.48k
1.00k
14.31k
2.42k
10%
1.92k
0.66k
12.12k
1.68k
Table 1. Percentage of Output Voltage Change vs Trim Resistor Value (Ohms)
Figure 3A. Trim Connections Using a Trimpot
The following equations mathematically depict:
Output Voltage for a given Trim Resistor
Trim Resistor for a given Output Voltage
A resistor connected from the Trim Pin (pin 5 for 5V trim, pin 8 for 3.3V trim)
to the appropriate Return (pin 6 for 5V trim, pin 9 for 3.3V trim) will increase
the output voltage.
5 Volt Trim Up
+3.3V OUTPUT
3.3V TRIM
1
+5V OUTPUT
+INPUT
5V TRIM
5V RETURN
VO = 5.0 +
8
–INPUT
3.3V RETURN
4
10
9
+3.3V
TRIM
UP
+3.3V
LOAD
1
0.30RTUP (kΩ) + 1.5
RTUP (kΩ) =
1
(0.3VO) – 1.50
–4.99
5 Volt Trim Down
7
1.14
5
6
+5V
TRIM
UP
VO = 1.25
+5V
LOAD
0.38 +
+1
1
1
RTDOWN (kΩ) =
RTDOWN (kΩ) + 4.99
–4.99
1.14
(0.8VO) – 1
–0.38
3.3 Volt Trim Up
Figure 3B. Increase Output Voltage Trim Connections Using a Fixed Resistor
VO = 3.30 +
1
RTUP (kΩ) + 2.37
A single resistor connected from the Trim Pin (pin 5 for 5V trim, pin 8 for
3.3V trim) to its appropriate +Output (pin 7 for 5V trim, pin 10 for 3.3V trim)
will decrease the output voltage.
+3.3V OUTPUT
1
8
–INPUT
3.3V RETURN
+5V OUTPUT
4
+INPUT
VO = 1.23
9
+3.3V
TRIM
DOWN
+3.3V
LOAD
5
+5V
TRIM
DOWN
+5V
LOAD
5V RETURN
6
–2.37
1.23 +
2.07
1
RTDOWN (kΩ)+ 2.37
1
+1
RTDOWN (kΩ) =
2.07
–1.23
VO –1
1.23
–2.37
Note: Resistor values are in kΩ. Accuracy of adjustment is subject
to tolerances of resistor values and factory-adjusted output accuracy.
VO = desired output voltage.
7
5V TRIM
1
VO – 3.3
3.3 Volt Trim Down
10
3.3V TRIM
RTUP (kΩ) =
Case Connection
BCP DC/DC's do not have their metal baseplate connected to one of the input
pins. The "uncommitted" baseplate is connected to pin 2 which, depending
upon your system configuration, should be connected to either +Input (pin 4),
–Input (pin 1), Output Returns (pins 6 & 9), or earth ground.
Figure 3C. Decrease Output Voltage Trim Connections Using a Fixed Resistor
6
BCP Models
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
Typical Performance Curves
D24 Model
D48 Model
Output Ripple and Noise (PARD)
(VIN = 24V, [email protected], 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
Output Ripple and Noise (PARD)
(VIN = 48V, [email protected], 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
3.3V Output
Ripple/Noise
20mV/div
3.3V Output
Ripple/Noise
20mV/div
5V Output
Ripple/Noise
20mV/div
5V Output
Ripple/Noise
20mV/div
1µsec/div
1µsec/div
5V Output Full-Load to Half-Load Transient Response
5V Output Full-Load to Half-Load Transient Response
(VIN = 24V, [email protected] 0A, external 10µF || 1µF output capacitors.)
(VIN = 48V, [email protected] 0A, external 10µF || 1µF output capacitors.)
5V Output
100mV/div
5V Output
100mV/div
15A
15A
Output
Current
5A/div
Output
Current
5A/div
7.5A
7.5A
100µsec/div
100µsec/div
5V Output Half-Load to Full-Load Transient Response
5V Output Half-Load to Full-Load Transient Response
(VIN = 24V, [email protected] 0A, external 10µF || 1µF output capacitors.)
(VIN = 48V, [email protected] 0A, external 10µF || 1µF output capacitors.)
5V Output
100mV/div
5V Output
100mV/div
15A
Output
Current
5A/div
15A
Output
Current
5A/div
7.5A
7.5A
100µsec/div
100µsec/div
7
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
XCP Series
Typical Performance Curves
D24 Model
D48 Model
3.3V Output Full-Load to Half-Load Transient Response
3.3V Output Full-Load to Half-Load Transient Response
(VIN = 24V, [email protected] 0A, external 10µF || 1µF output capacitors.)
(VIN = 48V, [email protected] 0A, external 10µF || 1µF output capacitors.)
3.3V Output
100mV/div
3.3V Output
100mV/div
15A
Output
Current
5A/div
15A
Output
Current
5A/div
7.5A
7.5A
100µsec/div
100µsec/div
3.3V Output Half-Load to Full-Load Transient Response
3.3V Output Half-Load to Full-Load Transient Response
(VIN = 24V, [email protected] 0A, external 10µF || 1µF output capacitors.)
(VIN = 48V, [email protected] 0A, external 10µF || 1µF output capacitors.)
3.3V Output
200mV/div
3.3V Output
200mV/div
15A
15A
Output
Current
5A/div
Output
Current
5A/div
7.5A
7.5A
100µsec/div
100µsec/div
Input Ripple Current
Input Ripple Current
(VIN = 24V, 5V @ 15A, [email protected] 0A, external 22µF low-ESR input capacitor.)
(VIN = 48V, 5V @ 15A, [email protected] 0A, external 22µF low-ESR input capacitor.)
50mA/div
50mA/div
1µsec/div
1µsec/div
8
BCP Models
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
Typical Performance Curves
D24 Model
D48 Model
Input Ripple Current
Input Ripple Current
(VIN = 24V, 5V @ 0A, 3.3V @ 15A, external 22µF low-ESR input capacitor.)
(VIN = 48V, 5V @ 0A, 3.3V @ 15A, external 22µF low-ESR input capacitor.)
50mA/div
50mA/div
1µsec/div
1µsec/div
Start-Up from Remote On/Off Control
Start-Up from Remote On/Off Control
(VIN = 24V, [email protected] 7.5A, 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
(VIN = 48V, [email protected] 7.5A, 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
Remote
On/Off
(Pin 3)
2V/div
Remote
On/Off
(Pin 3)
2V/div
3.3V
Output
2V/div
3.3V
Output
2V/div
5V
Output
2V/div
5V
Output
2V/div
4msec/div
4msec/div
Start-Up from VIN
Start-Up from VIN
(VIN = 24V, [email protected] 7.5A, 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
(VIN = 48V, [email protected] 7.5A, 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
VIN
10V/div
VIN
20V/div
3.3V
Output
2V/div
3.3V
Output
2V/div
5V
Output
2V/div
5V
Output
2V/div
4msec/div
4msec/div
9
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
XCP Series
Typical Performance Curves
D24 Model
D48 Model
Output Power vs. Ambient Temperature
(Without heat sink, 5V Output, 3.3V @ 0A.)
80
80
70
70
60
60
Output Power (Watts)
Output Power (Watts)
Output Power vs. Ambient Temperature
(Without heat sink, 5V Output, 3.3V @ 0A.)
50
40
Natural Convection Cooling
30
150 Linear Feet Per Minute
20
50
40
Natural Convection Cooling
30
150 Linear Feet Per Minute
20
300 Linear Feet Per Minute
10
300 Linear Feet Per Minute
10
0
–40
–10
0
10
20
30
40
50
60
70
80
90
0
–40
100
–10
0
10
Ambient Temperature (°C)
70
70
60
60
Output Power (Watts)
Output Power (Watts)
80
50
40
Natural Convection Cooling
150 Linear Feet Per Minute
60
70
80
90
100
40
Natural Convection Cooling
30
150 Linear Feet Per Minute
300 Linear Feet Per Minute
10
0
–40
0
35
40
45
50
55
60
65
70
75
80
85
90
95
0
–40
100
0
35
40
45
50
55
60
65
70
75
80
85
90
95
100
Ambient Temperature (°C)
Ambient Temperature (°C)
Output Power vs. Ambient Temperature
(Without heat sink, 3.3V Output, 5V @ 0A.)
Output Power vs. Ambient Temperature
(Without heat sink, 3.3V Output, 5V @ 0A.)
50
50
Output Power (Watts)
Output Power (Watts)
50
50
20
300 Linear Feet Per Minute
10
40
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
10
300 Linear Feet Per Minute
0
–40
–10
0
10
20
30
40
50
60
70
80
90
40
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
10
300 Linear Feet Per Minute
0
–40
100
–10
0
10
Ambient Temperature (°C)
30
40
50
60
70
80
90
100
Output Power vs. Ambient Temperature
(With HS-CP heat sink, 3.3V Output, 5V @ 0A.)
50
Output Power (Watts)
50
40
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
10
0
–40
20
Ambient Temperature (°C)
Output Power vs. Ambient Temperature
(With HS-CP heat sink, 3.3V Output, 5V @ 0A.)
Output Power (Watts)
40
Output Power vs. Ambient Temperature
(With HS-CP heat sink, 5V Output, 3.3V @ 0A.)
80
20
30
Ambient Temperature (°C)
Output Power vs. Ambient Temperature
(With HS-CP heat sink, 5V Output, 3.3V @ 0A.)
30
20
300 Linear Feet Per Minute
0
35
40
45
50
55
60
65
70
75
80
85
90
95
40
30
150 Linear Feet Per Minute
10
0
–40
100
Ambient Temperature (°C)
Natural Convection Cooling
20
300 Linear Feet Per Minute
0
35
40
45
50
55
60
65
70
75
Ambient Temperature (°C)
10
80
85
90
95
100
BCP Models
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
Typical Performance Curves
D24 Model
D48 Model
5V Efficiency vs. Load
(+3.3V Output @ 0 Amps.)
5V Efficiency vs. Load
(+3.3V Output @ 0 Amps)
90
90
88
88
86
86
84
82
VIN = 24V
VIN = 30V
Efficiency (%)
Efficiency (%)
84
80
VIN = 18V
78
76
74
VIN = 75V
VIN = 60V
82
80
VIN = 48V
78
76
74
72
VIN = 36V
72
VIN = 36V
70
70
68
1.875
3.75
5.625
7.5
9.375
11.25
13.125
68
1.875
15
3.75
5.625
+5V Output Current (Amps)
7.5
9.375
11.25
13.125
15
13.125
15
+5V Output Current (Amps)
3.3V Efficiency vs. Load
(+5V Output @ 0 Amps.)
3.3V Efficiency vs. Load
(+5V Output @ 0 Amps.)
75.0
78
72.5
76
74
70.0
72
VIN = 18V
Efficiency (%)
Efficiency (%)
67.5
65.0
VIN = 24V
62.5
60.0
VIN = 30V
57.5
70
VIN = 60V
68
VIN = 48V
66
64
VIN = 36V
62
60
55.0
58
VIN = 36V
52.5
VIN = 75V
56
50.0
1.875
3.75
5.625
7.5
9.375
11.25
13.125
54
1.875
15
3.75
5.625
+3.3V Output Current (Amps)
11.25
Overall Efficiency vs. Line and Load
90
88
88
86
86
84
84
Efficiency (%)
Efficiency (%)
Overall Efficiency vs. Line and Load
82
+3.3V @ 0A and +5V @15A
+3.3V @ 3.75A and +5V @11.25A
+3.3V @ 7.5A and +5V @7.5A
+3.3V @ 15A and +5V @0A
78
9.375
+3.3V Output Current (Amps)
90
80
7.5
82
78
76
76
74
74
72
72
70
+3.3V @ 0A and +5V @15A
+3.3V @ 3.75A and +5V @11.25A
+3.3V @ 7.5A and +5V @7.5A
+3.3V @ 15A and +5V @0A
80
70
36
40.4
44.7
49
53.3
57.7
62
66.3
70.7
75
36
Input Voltage (Volts)
40.4
44.7
49
53.3
57.7
Input Voltage (Volts)
11
62
66.3
70.7
75
7 5 W, D UA L O U T P U T, M I X E D - VO LTAG E D C / D C C O N V E R T E R S
XCP Series
Typical Performance Curves
D24 Model
D48 Model
Output Ripple and Noise (PARD) vs. Input Voltage
(One output @ 15A, other output @ 0A,
PARD measured on loaded output, 20MHz bandwidth.)
Output Ripple and Noise (PARD) vs. Input Voltage
(One output @ 15A, other output @ 0A,
PARD measured on loaded output, 20MHz bandwidth.)
70
60
55
Output PARD Voltage (mVp-p)
Output PARD Voltage (mVp-p)
60
PARD 3.3V Output
50
PARD 5V Output
40
Ripple 3.3V Output
30
Ripple 5V Output
20
PARD 3.3V Output
50
45
40
35
PARD 5V Output
Ripple 3.3V Output
30
25
20
15
10
18
20.57
23.14
25.71
28.29
30.86
33.43
Ripple 5V Output
10
36
35
Input Voltage (Volts)
®
40.71
46.43
52.14
57.86
63.57
69.29
75
Input Voltage (Volts)
®
INNOVATION and EXCELLENCE
ISO 9001 REGISTERED
DS-0449
3/01
DATEL (UK) LTD. Tadley, England Tel: (01256)-880444
DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01
DATEL GmbH München, Germany Tel: 89-544334-0
DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-6354-2025
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
Internet: www.datel.com
Email: [email protected]
DATEL 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. The DATEL logo is a registered DATEL, Inc. trademark.
12