Reliability Incorporated
Product Data Sheet
2 Watt DC/DC Converters
for LAN Transceiver Chips
Key Features
•
•
•
•
Meets FCC Section 15, Sub Part
J, A and B
Continuous short circuit
protection with foldback on 2E
models
No derating to 71° C
Wide input range
The LAN series of DC/DC converters is designed to provide power and isolation for Local Area
Network (LAN) transceiver chips. The LAN series covers both the Cheapernet and Ethernet LAN
(IEEE 802.3 - 10 base 5 and 10 base 2 Standards) approach. The use of a compact and inexpensive
DC/DC converter as a power source for these transceiver chips allows conversion of the normal bus
power to the isolated power required. The series operates from inputs of 5 and 12 VDC for
Cheapernet with input/output isolation of 500 VDC. Ethernet converters offer a wide input range of
10.20 to 15.75 VDC with 2500 VDC isolation.
Reliability Incorporated also provides custom designed DC/DC Converters to meet customer
specifications. Reliability Incorporated is based in Houston, Texas, USA and is a leading provider of
semiconductor processing equipment and DC/DC converters. Corporate headquarters, located in
Houston, TX, USA is ISO 9001 certified. DC/DC converters are manufactured in Costa Rica.
General Electrical Specifications
(Specifications at Nominal Input and 25 C, nominal input voltage and rated output current unless otherwise noted.)
Parameter
Input Voltage Range
5V Devices
12 V Devices
Input Filter
Input/Output Isolation Voltage
Resistance
Output Voltage Accuracy
2QP & 2SP Device Types
Load Regulation
Output Noise/Ripple
Minimum Load Required
Line Regulation
Short Circuit Protection
Operating Temperature
Derating
Storage Temperature
FCC Sec 15, Sub Part J
2QP & 2SP Series
Limits
4.75 - 5.25 VDC
11.4 - 12.6 VDC
Filter Capacitor
500 VDC (Min)
10
3
megohms (Min)
± 5%
See Graph*
100mV P-P (Max)
10% of Full Load
See Graph*
Momentary
-25°C to +71°C
None
-55°C to +125°C
Yes
Conditions
All Device Types
Nom. Line at Full Load
20Hz-20MHz Bandwidth
All Units
All Units
To 71°C
Class B Radiated,
Class A Conducted
2Watt Lan 4/22/2003
General Electrical Specifications
(Specifications at Nominal Input and 25 C, nominal input voltage and rated output current unless otherwise noted.)
Parameter
Input Voltage Range
Input Filter
Input/Output Isolation
Voltage
Resistance
Output Voltage Accuracy
Load Regulation
Line Regulation
Output Noise/Ripple
Short Circuit Protection
Duration
Switching Frequency
Operating Temperature
Derating
Storage Temperature
External Heatsink
Case
Encapsulant
Heat Dissipation
FCC Sec 15, Sub Part J
2E12R9 Series
Limits
10.2 - 15.75VDC
Filter Capacitor
2500 VDC (Min)
10
3
Megohms (Min)
± 5%
50mV
300mV
100mV, P-P (Max)
Current Foldback
Continuous
30 KHz
-25°C to +71°C
None
-55°C to +125°C
Recommended For Still Air Environments
UL94V-0
UL94H-B
45°C Case Rise
Yes
Conditions
All Devices
All Device Types
All Device Types
Nom. Line at Full Load
Nom. Line, NL to FL
Full Input Range, FL
20Hz-20MHz Bandwidth
All Units
Typical
To 71°C
High Line, Full Load
Class B Radiated,
Class A Conducted
Selection Guide
Device
Type
2QP5U9
2SP5U9
2QP12U9
2E12R9
2SP12U9
Input Voltage
Range VDC
4.75 - 5.25
4.75 - 5.25
11.40 - 12.60
10.20 - 15.75
11.40 - 12.60
Typical Input
Current (A) @
Max Load
.600
.600
.250
.350
.250
Output
Voltage
VDC
-9
-9
-9
-9
-9
Max Output
Current (mA)
250
250
250
250
250
Package/
Pinout
QA
SA
QA
2E
SA
Reliability Incorporated Locations
Headquarters
Reliability Incorporated
P.O. Box 218370
Houston, Texas 77218
USA
Tel: 281 492-0550
Fax 281 492-0615
www.relinc.com
ISO 9001 Certified
Sales
Reliability Incorporated
Tel: 281 492-0550
Fax 281 492-0615
dcdcinfo@relinc.com
www.dc-dcpower.com
ISO 9001 Certified
Far East Sales
Reliability Singapore Pte. Ltd.
Blk 103 Boon Keng Rd.
Singapore 339774
Tel: 65 299 4938
Fax: 65 299 4829
ISO 9002 Certified
2Watt Lan 4/22/2003
Mechanical Specification (dimensions in inches)
Copyright© 2003, Reliability Incorporated. Reliability reserves the right to make changes in the product at any time, without notification.
2Watt Lan 4/22/2003
国产芯片交流
