廬
廬
INNOVATION and EXCELLENCE
Dual Output
Mixed Voltage, BWR Models
5V and 3.3V, Independent Dual Output
30 Watt, DC/DC Converters
Features
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Independently regulated 5V/ 3.3V outputs
5V @ 3A/3.3V @ 4.25A simultaneously
delivered
Independent V
OUT
Trim pins for margining
Independent On/Off Control pins
88% ef鏗乧iency; 75mV ripple/noise
Input ranges: 10-18V, 18-36V or 36-75V
UL 1950 and EN60950 safety approvals
Fully isolated, 1500Vdc guaranteed
Input under and overvoltage shutdown
Independent OVP; short circuit protection
Thermal shutdown
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DATEL's BWR series of DC/DC converters now includes two independent con-
verters in one 2" x 2" package. The BWR-5/3-3.3/4.25 family provides both 5V at 3
Amps and 3.3V at 4.25 Amps for a combined output power of 30 Watts from input
ranges of 10V to 18V (-D12A), 18 to 36V (-D24A), or 36 to 75V (-D48A).
Each output is regulated by its own control loop to provide 鹵1% load and 鹵0.5%
line regulation. Individual trim pins and a negative or positive on/off control pin
allow independent adjustment of output voltages and any combination of power-on
sequencing between the 5V and 3.3V outputs. A high ef鏗乧iency of 88% allows full
load operation up to +65擄C ambient temperature in a still air environment. Although
functionally independent, both outputs are driven from synchronized PWMs to
prevent asynchronously generated beat frequencies.
Housed in a plastic case, all models include input Pi 鏗乴tering, input overvoltage
protection, independent output short circuit and current limiting protection and
independent output overvoltage protection as well as thermal shutdown. A Sync
option is available in place of 3.3V on/off control. These devices meet IEC950,
UL1950 and EN6950 safety standards. CB reports are available upon request.
"D48A" models are CE marked (meet LVD requirements).
+INPUT
+5V OUTPUT
鈥揑NPUT
SWITCH
CONTROL
+5V
OUTPUT
RETURN
5V ON/OFF
CONTROL
INPUT UNDERVOLTAGE
AND OVERVOLTAGE
COMPARATORS
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
3.3V ON/OFF
CONTROL
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
+3.3V OUTPUT
SWITCH
CONTROL
+3.3V
OUTPUT
RETURN
Figure 1. Simpli鏗乪d Schematic
DATEL, Inc., Mans鏗乪ld, MA 02048 (USA) 路 Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 路 Email: sales@datel.com 路 Internet: www.datel.com
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