Diotec Products for Telecommunication

Diotec Products
for Telecommunication
Typical Applications:
Handsets, Mobile Chargers, Modems, Interfaces, Power Supplies,
Equipment and Line Cards
Handsets
Î
SMD Schottky Diodes
Mobile Chargers
Î
Bridge Rectifiers:
MiniDIL, MicroDIL
DC/DC-Converter
Î
Schottky Diodes, Superfast-/
Ultrafast-Rectifiers
Protection
Î
TVS-Diodes, SDA2/4AK (Low Cj),
(Fast) Bridge Rectifiers
Voltage Regulation
Î
Zener Diodes
OR-ing Diodes
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Schottky Diodes, Standard
Rectifiers
Diotec Semiconductor AG
Kreuzmattenstr. 4
79423 Heitersheim
Germany
Tel.: +49-7634-5266-0
Fax: +49-7634-5266-61
[email protected]
www.diotec.com
Version 2005-11-03
Handsets, Mobile Phones
Schottky Diodes for Polarity Protection
Connected between the battery of the mobile phone (or any other portable device) and the contacts to
the external charger. They protect the battery of unwanted reverse current if contacts are short cut and
also against charging with wrong polarity. Low forward voltage drop of a Schottky rectifier leads to
small power losses during charging. The SGL34 and SGL1 in the MiniMELF package use minimal
space on a PCB.
Types1
SMD: SGL34-20…100, SGL1-20…100, SMS120…1100, SMS220…2100, SMS320…3100;
SK12…110, SK32SMA…310SMA, SK52…510, SK82…810; (0.5 to 8 A!)
1
Preferred types are bold; colours according to Diotec Selection Guide
Diotec Products for Telecommunication
www.diotec.com 11/2005
Mobile Chargers / DC-DC Converters
Rt
~
+
~
CL
Available as single device
on request
Overvoltage Protection: TVS-Diodes/Zenerdiodes1
TGL34-… , TGL41-…, P4SMA…, P6SMB…, 1.5SMC…; (150 bis 1500 W peak; up to 550 V!)
ZMM…, ZMD…, ZMY..., SMZ1..., SZ3C…, Z1SMA…, Z2SMB…, Z3SMC…; (0.5 bis 3 W continous)
Input Rectification: Bridge Rectifiers1
0.5 to 2 A
SMD: MYS40…380, MS40…500, S40…500, B40…500S, B40…380FS (Fast), CS10…50S (Schottky)
trough hole: B40…500D, B40…380FD (Fast recovery), CS10…50D (Schottky), B40…500R (round)
Clamping Network: TVS-/Fast-Diode1
TGL34-… , TGL41-…, P4SMAJ…, P6SMBJ…, 1.5SMCJ…; (150 bis 1500 W peak; up to 550 V!)
RGL34…, RGL1…, SA154…160, FR1…, FR2…, FR3…; (0.5 to 3 A)
Output Rectification: Schottky Diodes1
SGL34-20…100, SGL1-20…100, SMS120…1100, SMS220…2100, SMS320…3100;
SK12…110, SK32SMA…310SMA, SK52…510, SK82…810; (0.5 bis 8 A!)
1
Preferred types are bold; colours according to Diotec Selection Guide. Datasheets see
www.diotec.com, “Products”. More detailed information see application note “Diotec Products for Power
Supplies”. Though devices mentioned here are mostly SMD types for space and weight saving there are
also equivalent leaded versions available.
Diotec Products for Telecommunication
www.diotec.com 11/2005
Telecom Equipment Lightning Protection
T
TNI
R
RD
Rectifier bridges are commonly used in telecommunications equipment, such as Analogue Line Cards,
Customer Premises Equipment (CPE – phones, modems, faxes and PABX), High Speed
Transmission equipment such as ADSL, SHDSL, ISDN or E1/T1. Rectifiers can be used as clamping /
steering diodes or to build common protection among multiple lines.
Recommend products1:
Space Saving
MYS40, MS40
– offer space savings when having multiple lines per board (package only 3x3 mm²!)
Standard bridge rectifier
S40, B40S
– for standard solutions
Fast recovery bridges
S40F, B40FS
– offer a cost effective advantage of a faster recovery time during the Vf overshoot and as such reduce
the let through energy
Schottky bridges
CS30S, CS50S
– Schottky bridges offer the lowest clamping
1
Colours according to Diotec Selection Guide. Datasheets see www.diotec.com, “Products”. Though devices mentioned here
are SMD types for space and weight saving there are also equivalent leaded versions available.
Diotec Products for Telecommunication
www.diotec.com 11/2005
Data Line Protection
TVS-Diodes
Available as unidirectional and bidirectional version (add suffix “C” resp. “B” at BZW-types).
Bidirectional devices clamp both positive and negative voltage spikes.
Dimensioning: the maximum occuring signal voltage must not exceed the stand-off voltage VWM of
the device. At a maximum current of IPPM and 10/1000 µs pulse shape (see datasheet) the maximum
clamping voltage is VC. The circuits (input, output) to protect should withstand at least this voltage.
Types1
Leaded: BZW04-…, P4KE…, BZW06-…, P6KE…, 1.5KE… , 5KP…; (400 to 5000 W; up to 520 V!)
SMD:
TGL34-… , SDA2/4AK, TGL41-…, P4SMA…, P6SMB…, 1.5SMC… ; (150 to 1500 W; up to 550 V!)
SDA2/4AK series: low capacitance protection
Special protection devices are the SDA4AK and the SDA2AK types. They consist of antiparallel
switched standard rectifiers in a single MELF (DO-213AB) package (see below). By this a nominal
clamping voltage of 2 respectively 1 V is achieved, allowing peak pulse currents as high as 40 A. On
request, also higher clamping voltages can be offered.
The resulting capacitance of these parts are in the lower pF range, allowing for protection of high
frequency data lines. Furthermore, these devices can be put in series to other protection devices to
reduce their capacitance to extremely low values.
SDA4AK
0.5
0.5
Type
Typ
5.0
2.5
SDA2AK
1
Preferred types are bold; colours according to Diotec Selection Guide. Datasheets see www.diotec.com, “Products”.
Diotec Products for Telecommunication
www.diotec.com 11/2005
Voltage Regulation
Unregulated
DC voltage
Regulated
DC voltage
Zener diodes for simple voltage regulation
A simple method to provide stabilized voltages from an unregulated voltage source. The resistor has
to be choosen so that maximum allowable zener current IZmax (see datasheet) at the maximum
occuring input voltage and at no load at the output is not exceeded. If voltage source is formed by a
transformer, the series resistance of the windings may be enough to provide this resistor. Power
dissipation of below devices ranges up to 5 W (leaded) and 3 W (SMD) respectively. For higher power
needs series connection of zener diodes can be used.
Tolerance is graded to E24 standard (approximately +/- 5%), if tighter limits are required parts with
+/- 2% tolerance are available on request.
Types1
Leaded: ZPD…, ZPY…, ZY…, 3EZ…, 1N53..B; (0.5 to 5 W)
SMD:
BZX84C…, 2BZX84C…, ZMM…, ZMD…, ZMY..., SMZ1..., SZ3C…, Z1SMA, Z2SMB…,
Z3SMC…; (0.2 to 3 W)
Reliable operation when lightning strikes …
Small signal diodes like ZPD/ZMM or BZX84 are using small area, planar chips inside. Contacts are
made either by pressure contact (glass packaged ZPD/ZMM) or wire bonds (BZX84). They provide a
low cost solution for voltage regulation, but are more sensitive against overvoltages caused by
lightning etc (there is always some let through energy from the primary/secondary protection when
lightning strikes!). Power zener diodes like the ZY, ZMD, Z1SMA etc series are manufactured using
rugged non-planar chips that have a bigger die area, and are contacted by using robust solder joints.
They are the preferred solution for high reliability circuits.
1
Preferred types are bold; colours according to Diotec Selection Guide. Datasheets see www.diotec.com, “Products”.
Diotec Products for Telecommunication
www.diotec.com 11/2005
OR-ing Diodes
DC
Source
1
DC
Source
2
Decoupling of voltage sources: Standard or Schottky Diodes
If low power losses are required and DC voltage is below 100 V Schottky diodes can be used. Special
diodes (on request) offer beside low forward voltage drop also low leakage currents. Standard diodes
are suitable for higher voltages, for high current applications the usage of press-fit packages is
possible. The D30V.. series is a common cathode configuration of standard diodes within a square
bridge package.
Types1
Leaded: 1N4001…7, 1N5391…99, 1N5400K…08K, 1N5400…08, BY251…55, BY550-…,
P600…, P1000…, P1200…; (1 to 12 A)
SB120…1100, SB220…2100, SB320…3100, SB520…5100, SB820…8100; (1 to 8 A)
SMD: GL34…, GL1…, SM4001…7, SM5059…63, SM5400…08, S1…, S2…, S3…, S5…; (0.5 to 5 A)
SMS120…1100, SMS220…2100, SMS32…310; SK12…110, SK32SMA…310SMA, SK52…510;
SK82…810 (1 to 8 A!)
Pressfit: BYP25…, BYP35…, BYP60…, KYW25…, KYW35…, KYZ25…, KYZ35…; (25 to 60 A)
Square with Fast-on or Wire leads: D30VC20…80; (2x15 A)
Diotec Products for Telecommunication
www.diotec.com 11/2005