Input current at nominal input line = 1.45A (Output Power = 60W)
*Models available with -1 option (negative logic)
1
Total output power not to exceed 60 Watts
WPA60R48DC
REV A: RoHS
06/2006
SPECIFICATIONS, ALL MODELS
PARAMETER
INPUT
Voltage Range
Reflected Ripple Current
INPUT CONTROL
Temperature Shutdown
Temperature Hysteresis
Quiescent Standby Current
Undervoltage Lockout
Undervoltage Shutdown
Specifications are at T
A
= +25°C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
CONDITIONS
Vin = 48V, Io=I Rated
MIN
36
TYP
48
MAX
75
675
UNITS
VDC
mApk-pk
INPUT
PCB
Vin = 48VDC
120
5
8
32.5
2
10
°C
°C
mA
V
V
SPECIFICATIONS
PARAMETER
ISOLATION
Rated Voltage
Resistance
Capacitance
Leakage Current
Specifications are at T
A
= +25°C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
CONDITIONS
MIN
2000
10
1000
90
TYP
MAX
UNITS
VDC
MW
pF
mArms
240 VAC
OUTPUT
Rated Power
Voltage Setpoint Accuracy
Temperature Coefficient
Output Voltage
(Over all conditions of I/P voltage
load & temperature)
Ripple & Noise
(NOTE 1)
Output Adjust Range
Trim Up
Trim Down
Short Circuit and
Overcurrent Protection
Max Capacitive Load
Overvoltage Protection
GENERAL
Switching Frequency
MTTF per ML-HDBK-217
Ground Benign
Package Weight
TEMPERATURE
Operation/Specification
Storage
Shutdown Temperature
60
±1.5
±0.005
V1
V2
BW = 5Hz to 20MHz
2
8
90
8
5
120
10,000
15
W
%
%/°C
% of Nom
% of Nom
mVp-p
%
%
%
mF
%
GENERAL
350
Circuit Stress Method
TA = +25° Unmodified Database
1,000,000
30
KHz
Hr
g
PCB Temperature
PCBTemperature
PCB Temperature
-40
-55
+120
+100
+125
°C
°C
°C
NOTE 1:
Measured at 20 MHz bandwidth across a 6mf multi layer ceramic capacitor located approximately 1” from output terminals.
Product: www.cd4power.com
WPA60R48DC
REV A: RoHS
06/2006
2
MECHANICAL
1
2
3
4
5
6
7
PIN FUNCTIONS
+Vin
Remote On/Off
-Vin
+Vout2
Return
Trim
+Vout1
NOTES:
Pin placement tolerance: +.010
Pin material: Brass
Pin Finish: Tin/Lead over Nickel
Converter weight: [24g]
To Find Model Number
WPA60R48D
yz
ORDERING INFORMATION
-
C
Model Numbers
WPA60R48D1510C
WPA60R48D1812C
WPA60R48D2215C
WPA60R48D2518C
WPA60R48D3312C
WPA60R48D3318C
WPA60R48D3325C
WPA60R48D0515C
WPA60R48D0533C
WPA60R48D1510-1C
WPA60R48D1812-1C
WPA60R48D2215-1C
WPA60R48D2518-1C
WPA60R48D3312-1C
WPA60R48D3318-1C
WPA60R48D3325-1C
WPA60R48D0515-1C
WPA60R48D0533-1C
Part Numbers
6064965
6064957
6064956
6064955
6064953
6064952
6064951
6064966
6064954
6064993
6064992
6064991
6064990
6064989
6064988
6064987
6064994
6064986
Device Family
60 Watt, Dual Output,
Quarter Brick, 48VDC Input Range
Model Number
Selected from Product Selection Chart (above)
y = 15 = 1.5V, 18 = 1.8V, 22 = 2.2V, 25 = 2.5V,
33 = 3.3V, 05 - 5.0V,
z = 10 = 1.0V, 12 = 1.2V, 15 = 1.5V, 18 - 1.8V
25 = 2.5V, 33 = 3.3V
Remote On/Off Logic
Positive Logic - No Number
Negative Logic - 1
RoHS Compliant
THROUGH-HOLE SOLDERING INFORMATION
These devices are intended for wave soldering or manual soldering.
They are not intended to be subject to surface mount processes under any circumstances.
The normal wave soldering process can be used with these devices where the device is subjected to a maximum wave temperature of 260°C for a period of
no more than 10 seconds. Within this time and temperature range, the integrity of the device’s plastic body will not be compromised and internal temperatures
within the converter will not exceed 175°C. Care should be taken to control manual soldering limits identical to that of wave soldering.
Product: www.cd4power.com
WPA60R48DC
REV A: RoHS
06/2006
APPLICATION NOTES
Operation
Output Voltage Trim
Each of the WPA60C’s output voltages may be simulta-
neously adjusted above or below the nominal set point
by a value as indicated on the Product Data Sheet. As
shown in
Figure 1,
to raise the converter output volt-
age a resistor must be placed between the Trim pin and
Return pin.
Remote ON/OFF Function
The WPA60C is equipped with a primary ON/OFF
pin used to remotely turn the converter on or off via a
system signal. The input is TTL open-collector and/or
FET open-drain compatible. For the positive logic
model a system logic low signal will turn the unit off.
For negative logic models a system logic high signal will
turn the converter off. For negative logic models where
no control signal will be used the ON/OFF pin should be
connected directly to –Vin to ensure proper operation.
For positive logic models where no control signal will
be used the ON/OFF pin should be left open for normal
operation.
+ Vin
+ Vout1
Trim
Return
+ Vout2
+ Vin
+ Vout1
Trim
Return
+ Vout2
R
T
R
L2
R
L1
ON/OFF
WPA60
C
(Top View)
- Vin
Figure 1 – Trim Up Circuit
To lower the converter output voltage a resistor must
be placed between the Trim pin and Vout1 pin as
shown in
Figure 2.
+ Vin
+ Vout1
Trim
Return
+ Vout2
R
L2
R
T
R
L1
ON/OFF
WPA60
C
(Top View)
- Vin
Control Signal
Figure – Remote ON/OFF Control Circuit
ON/OFF
WPA60
C
(Top View)
Protective Functions
Temperature Shutdown
The over temperature shutdown feature of the
WPA60C will cause the unit to shutdown at a typical
pwb temperature of 120
o
C. This protective feature is
comprised of a thermistor in the unit control loop. At a
temperature of 120
o
C this circuit will cause the PWM
to go into an idle mode, resulting in no output from
the converter and preventing damage to the converter
components. When the temperature of the unit drops
below 120
o
C the fault condition will clear and the
converter will resume normal operation. If the cause
of the over temperature condition is not identified and
corrected the unit will continue to cycle on and off.
- Vin
Figure 2 – Trim Down Circuit
The resistance value required to achieve the desired
amount of positive/negative trim can be determined by
referring to the trim graph for each model. If trimming
is not desired then the Trim pin should be left uncon-
nected.
Product: www.cd4power.com
WPA60R48DC
REV A: RoHS
06/2006
4
APPLICATION NOTES
Input Under-Voltage Shutdown
The nominal input voltage for the WPA60C is 48Vdc.
At an input voltage of 32.5Vdc nominal the unit will
shutdown on an input under-voltage condition. At an
input voltage less than 32.5V the under-voltage sensing
circuit will send a signal to the PWM causing it to go
into idle mode. This will result in no output from the
converter, protecting the unit from a high input current
condition. When the input voltage returns to a level
above 32.5V the unit will return to normal operation. The
unit will typically turn on at an input voltage of 34.5V
nominal as indicated on the Product Data Sheet. This
is due to hysterisis designed into the protective circuit to
prevent excessive cycling of the converter.
Over-Current Protection
To protect against fault or short-circuit conditions on the
output, each module is equipped with current-limiting
circuitry designed to provide continuous protection. After
reaching the current limit point (typically 20% above the
rated output current), the voltage will range between its
rated value and zero, depending upon the amount of
overload. The unit will remain in operation continuously
during this period down to a short-circuit condition.
Once the short or overload has been eliminated, the
output voltage will return to normal without cycling the
input power.
Performance Characterization
Thermal Derating
Maximum ouput current vs. ambient temperature
at various airflow rates has been determined for
each model of the WPA60C. From these graphs,
the combination of maximum ambient temperature
and minimum airflow for select output current
combinations can be determined. Each model was
analyzed for maximum allowable output power over
an ambient temperature range of 0 to 85
o
C and for
airflows up to 600LFM. In each case the maximum
allowable power at a given airflow and ambient
temperature is defined as the point at which a known
component reaches its individual temperature limit.
Efficiency
Efficiency data for each model was determined
as a function of Load Current and Input Voltage.
Efficiency vs. Load Current was measured at an
ambient temperature of 25
o
C, an airflow of 300LFM
with an input voltage of 48Vdc. Efficiency vs. Input
Voltage was measured at an ambient temperature of
25
o
C, an airflow of 300LFM and rated load. Graphs
for each model are provided in their respective
section.
Start-Up, ON/OFF and Transient Response
For each model, waveforms are provided showing
output voltage response and timing to input voltage
power up/down, Remote ON/OFF state change and
load current transient responses. Separate traces
are provided showing the on/off timing sequence
of the two outputs relative to one another. Output
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