BWR-12/725-D24A-C Murata Power Solutions Inc, BWR-12/725-D24A-C Datasheet - Page 5

• Manufacturer Part Number: BWR-12/725-D24A-C
• Description: CONV DC/DC +/-12V +/-725MA DIP
• Manufacturer: Murata Power Solutions Inc
• Series: BWRr
• Type: Isolatedr

Specifications of BWR-12/725-D24A-C

• Number Of Outputs: 2
• Output: ±12V
• Power (watts): 17W
• Mounting Type: Through Hole
• Voltage - Input: 18 ~ 36V
• Package / Case: 6-DIP Module
• 1st Output: 12 VDC @ 725mA
• 2nd Output: -12 VDC @ 725mA
• Size / Dimension: 2.00" L x 1.00" W x 0.47" H (50.8mm x 25.4mm x 11.8mm)
• Power (watts) - Rated: 17W
• Efficiency: 85%
• Approvals: CE, cUL, EN, UL
• Output Power: 9 W
• Input Voltage Range: 18 V to 36 V
• Output Voltage (channel 1): 12 V
• Output Current (channel 1): 0.725 A
• Output Voltage (channel 2): - 12 V
• Output Current (channel 2): -0.725 A
• Isolation Voltage: 1.5 KV
• Product: Isolated
• Dc / Dc Converter O/p Type: Dual
• No. Of Outputs: 2
• Input Voltage: 18V To 36V
• Power Rating: 17W
• Output Voltage: 12V
• Output Current: 725mA
• Output Voltage 2: -12V
• Output Current 2: -725mA
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 4th Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 811-1726-5

If loading from +/– Outputs to Output Return is symmetrical, the voltage at
Output pins with respect to Output Return will also be symmetrical. An unbal-
ance in loading will consequently result in a degraded V
from +/– Outputs to Output Return ( –Output to +Output regulation will still be
within specifi cation) with a load step from minimum to maximum load and with
the other output at full load, the maximum deviation is 2.5% V
Current Limiting
When output current increases to approximately 15% to 50% above 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 dissipa-
tion. This is commonly referred to as power limiting. Current limit inception
is defi ned as the point where the full-power output voltage falls below the
specifi ed tolerance. See Performance/Functional Specifi cations. If the load
current being drawn from the converter is signifi cant enough, the unit will go
into a short circuit condition. See "Short Circuit Condition."
Short Circuit Condition
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 a 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. The BWR 15-17W Series is capable of enduring an indefi nite short
circuit output condition.
Thermal Shutdown
These BWR converters are equipped with Thermal Shutdown Circuitry. If
environmental conditions cause the internal temperature of the DC/DC con-
verter rises above the designed operating temperature, a precision tempera-
ture sensor will power down the unit. When the internal temperature decreases
below the threshold of the temperature sensor the unit will self start.
15.5
15.4
15.3
15.2
15.1
14.9
14.8
14.7
15
0
Figure 4. Output Voltage Accuracy vs. Imbalanced Loading
BWR-15/575-D48A Unbalanced Output Load Regulation
10
20
Output Load Regulation (%)
30
40
50
60
www.murata-ps.com
70
OUT
regulation accuracy
80
OUT
nominal.
90
100
Start-Up Time
The V
the turn-on threshold point, and the fully loaded output voltage enters and remains
within its specifi ed accuracy band. Actual measured times will vary with external
output capacitance and load. The BWR 15-17W Series implements a soft start
circuit that limits the duty cycle of the PWM controller at power up, thereby limiting
the Input Inrush current.
The On/Off Control to V
input voltage applied but is turned off via the On/Off Control pin. The specifi cation
defi nes the interval between the time at which the converter is turned on and the
fully loaded output voltage enters and remains within its specifi ed accuracy band.
Similar to the V
governed by the internal soft start circuitry and external load capacitance.
On/Off Control
The input-side, remote On/Off Control function (pin 3) can be ordered to operate
with either polarity. Positive-polarity devices ("C" suffi x) are enabled when pin
3 is left open (or is pulled high, +13V to V
2, see Figure 2). Positive-polarity devices are disabled when pin 3 is pulled low
(0-0.8V with respect to –Input). Negative-polarity devices are off when pin 3 is
left open (or pulled high, 3.5V to V
See Figure 5.
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 Specs) when activated and withstand appropriate voltage when
deactivated.
Applying an external voltage to pin 3 when no input power is applied to the
converter can cause permanent damage to the converter.
IN
to V
15-17W, Dual Output DC/DC Converters
Figure 5. Driving the Negative Polarity On/Off Control Pin
Figure 4. Driving the Positive Polarity On/Off Control Pin
OUT
IN
start-up time is the interval of time where the input voltage crosses
to V
Technical enquiries email: [e-mail], tel:
2
3
2
OUT
3
OUT
ON/OFF
CONTROL
–INPUT
ON/OFF
CONTROL
–INPUT
start-up, the On/Off Control to V
start-up time assumes the converter has its nominal
IN
), and on when pin 3 is pulled low (0-0.5V).
IN
applied with respect to –Input, pin
MDC_BWR15-17W.B07 Page 5 of 9
BWR Series
+Vcc
13V CIRCUIT
5V CIRCUIT
OUT
+Vcc
start-up time is also
[phone]