RC1587MT ,3A Adjustable Low Dropout Voltage Regulator (LDO) Application Bulletin AB-28Power Conversion for the Data Communications Market ..
RC1587MT ,3A Adjustable Low Dropout Voltage Regulator (LDO) Application Bulletin AB-28Power Conversion for the Data Communications Market ..
RC1587MT ,3A Adjustable Low Dropout Voltage Regulator (LDO)applications schematics.including voice, data, video and wireless communications gravitating around ..
RC1587MT ,3A Adjustable Low Dropout Voltage Regulator (LDO)applications schematics.including voice, data, video and wireless communications gravitating around ..
RC1587MT ,3A Adjustable Low Dropout Voltage Regulator (LDO) Application Bulletin AB-28Power Conversion for the Data Communications Market ..
RC1587M-T ,3A Adjustable Low Dropout Voltage Regulator (LDO)features, together with loss-less current secondary voltage reference (RC431A) is also available se ..
RHCA-301Q43U , SURGE ABSORBER
RHCA-301Q43U , SURGE ABSORBER
RHK005N03 , 4V Drive Nch MOS FET
RHP020N06 , 4V Drive Nch MOS FET
RHP030N03 , 4V Drive Nch MOS FET
RHR1K160 ,1A/ 600V Hyperfast DiodeFeaturesThe RHR1K160 is a hyperfast diode with soft recovery• Hyperfast with Soft Recovery . . . . ..
RC1587M-RC1587MT-RC1587M-T-RC1587T
3A Adjustable Low Dropout Voltage Regulator (LDO)
AbstractThis application bulletin discusses the transition from tradi-
tional telephony to converged voice and data over Internet
Protocol (IP) and its implications for the power conversion
of such systems. A few power conversion examples are pro-
vided complete of applications schematics.
IntroductionThe arm wrestling between voice and data has concluded in
favor of the latter with all the major players now posturing
for leadership of the migration from traditional voice to
Internet Protocol (IP) telephony. On the short term the huge
investments in both traditional telephony infrastructure and
data over IP warrants that over the next few years we will
have to provide power conversion for both types of systems
as well as for the converged systems to come.
Current Environment with Separate
NetworksFig. 1 shows the current situation with voice going through
traditional PBX (Private Branch Office), Central Office, and
Switch to the Public Switch Telephone Network (PSTN). On
independent paths the data travels from Routers to wide Area
Networks (WAN) and the video goes trough a third indepen-
dent path.
Fig.1. Separate Networks for Voice, Data and Video
Migration to Converged Voice/
Data IPFig. 2 shows the envisioned converged Voice/Data/Video
system over IP. At the center of this new universe is the
Internet Protocol Wide Area Network, with all the services,
including voice, data, video and wireless communications
gravitating around it.
Fig. 2. Voice/Data/video Over IP
Telecom –48V DC Power DistributionTraditionally telecom systems have been distributing a DC
power (-48V typically) obtained from a battery back up
being continually charged by a Rectifier/Charger from the
AC line. Subsequently the –48V is converted into various
low positive DC voltages (Fig. 3 shows 12V only for
simplicity) as well as back to AC voltages as necessary.
Fig. 3. Telecom –48V DC power distribution
Datacom AC Power DistributionData centric systems tend to rely on an Uninterruptible
Power Supply (AC UPS) front-end for distributing AC
power, which subsequently is converted into the basic
constituents, -48V , AC power and low voltage DC (again,
