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R-78W-0.5 Datasheet, PDF (1/3 Pages) Recom International Power – 0.5 AMP SIP3 Single Output
Features
Switching
Regulator
• Efficiency up to 96%, no need for heatsinks!
• Build-in Diode Protection Circuit
• Low Profie (LxWxH= 11.5 x 8.5 x 17.5mm)
• Continuous Short Circuit Protection
• RoHS compliant
• IEC/EN-60950 Certified
DC/DC Converter
R-78W-0.5
Description
The R-78W series offers wired 0.5A switching regulators which are ideally suited to offer a stable
voltage supply without the need for a PCB for applications like high power LED lighting, battery
powered systems, cooling systems, or fans. Due to the high efficiencies of up to 96% there is no
need for a heat sink. The compact modules feature fully protected outputs and draw only 1mA under
no load conditions.
0.5 AMP
SIP3
Single
Output
33 YEAR
warranty
Selection Guide
Part
Number
R-78W3.3-0.5
R-78W5.0-0.5
R-78W9.0-0.5
R-78W12-0.5
Input
Voltage Range
(VDC)
6.5 - 32
6.5 - 32
11 - 32
15 - 32
Notes:
Note1:
Output
Voltage
(VDC)
3.3
5.0
9.0
12.0
Output
Current
(mA)
500
500
500
500
Efficiency
@ min. Vin
(%)
88
93
95
96
6800µF with <1sec start-up time
Max. Capacitive
Load (1)
(µF)
220
220
220
220
Specifications (measured at TA= 25°C, full load, nominal input voltage and after warm-up)
BASIC CHARACTERISTICS
Parameter
Input Voltage Range
Output Current (2)
Condition
Min.
6.5VDC
6mA
Typ.
24VDC
Max.
32VDC
500mA
Quiescent Current
0% Load
5mA
7mA
Switching Frequency
280kHz
330kHz
380kHz
Efficiency
Internal Power Dissipation
Output Ripple and Noise
20MHz BW limited
see Selection Guide
0.4W
50mVp-p 75mVp-p
Notes:
Note2:
Operation under no load will not damage the device, however they may not meet all
specifications. A minimum load of 6mA is recommended.
IEC-60950-1 Certified
EN-60950-1 Certified
REGULATIONS
Parameter
Output Voltage Accuracy
Line Voltage Regulation
Load Voltage Regulation
Transient Response
Condition
low line to high line, full load
10% to 100% load
50% - 100% Load, ΔIo/Δt 25mA/µs
10% - 100% Load, ΔIo/Δt 25mA/µs
Type
all models
3.3V, 5V
9V, 12V
3.3V, 5V
9V, 12V
all models
Value
±2% typ. / ±3% max.
±0.2% typ. / ±0.4% max.
±0.1% typ. / ±0.2% max.
±0.4% typ. / ±0.6% max.
±0.25% typ. / ±0.4% max.
±75mV typ.
±100mV max.
www.recom-international.com
REV.: 0/2015
Refer to Applications Notes
PA-1