I33115 查看數據表（PDF） - Murata Manufacturing
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I33115 Datasheet PDF : 11 Pages
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www.murata-ps.com
OKI-78SR Series
Fixed Output 1.5 Amp SIP DC/DC Converters
Typical unit
FEATURES
■ Ultra wide 7 to 36 VDC input range
■ Fixed Outputs of 3.3 or 5 VDC up to 1.5 Amps
■ Vertical or horizontal SIP-mount, small footprint
package
■ “No heat sink” direct replacement for 3-terminal
78xx-series linear regulators
■ High efficiency with no external components
■ Short circuit protection
■ Outstanding thermal derating performance
■ UL/EN/IEC 60950-1, 2nd Edition safety approv-
als (pending)
PRODUCT OVERVIEW
Fabricated on a 0.41 by 0.65 inch (10.4 by 16.5
mm) Single Inline Package (SIP) module, the OKI-
78SR series are non-isolated switching regulator
(SR) DC/DC power converters for embedded ap-
plications. The fixed single output converters offer
both tight regulation and high efficiency directly
at the power usage site and are a direct plug-in
replacement for TO-220 package 78xx series linear
regulators. Typically, no extra outside components
are required.
Two nominal output voltages are offered (3.3
and 5 VDC), each with 1.5 Amp maximum output.
Based on fixed-frequency buck switching topology,
the high efficiency means very low heat and little
electrical noise, requiring no external components.
The ultra wide input range is 7 to 36 Volts DC.
Protection features include input undervoltage
and short circuit protection, overcurrent and over
temperature shut down. The OKI-78SR is designed
to meet all standards approvals. RoHS-6 (no lead)
hazardous material compliance is specified as
standard.
Contents
Page
Description, Connection Diagram, Photograph
1
Ordering Guide, Model Numbering, Product Labeling
2
Detailed Electrical Specifications
3
Mechanical Specifications, Input/Output Pinout
4
Performance Data and Oscillograms
6
Soldering Guidelines, Technical Notes
10
+Vin
F1
External
DC
Power
Source
Connection Diagram
Controller
t4XJUDIJOH
t'JMUFST
t$VSSFOU4FOTF
Reference and
Error Amplifier
+Vout
Common
Figure 1. OKI-78SR
Note: Murata Power Solutions strongly recommends an external input fuse, F1.
See specifications.
Common
For full details go to
www.murata-ps.com/rohs
(certification is pending)
www.murata-ps.com/support
MDC_OKI-78SR-W36.A06 Page 1 of 11
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