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BR205 Schematic ( PDF Datasheet ) - Sanken

Teilenummer BR205
Beschreibung POL Converter Module
Hersteller Sanken
Logo Sanken Logo 




Gesamt 12 Seiten
BR205 Datasheet, Funktion
BR205
POL Converter Module for 5 V System Intermediate Bus
Features and Benefits
• Industry standard footprint
• Improved soldering: gold-plated pads and side notches
• Synchronized rectifying type stepdown chopper
• High power
• High efficiency: 96.4% at VIN = 5 V, VO = 3.3 V, IO = 5 A
• Operating temperature range: –40°C to 85°C
• Input voltage range: 4.5 to 7.0 VDC
• Output voltage: 0.75 to 3.63 V
• Output current range: 0 to 10 A
• Operating frequency: 600 kHz
• Overcurrent protection function
Description
The BR205 is a thin type POL converter modules with an industry
standard exterior shape and footprint, responsive to very high
speed loads and compatible with ceramic capacitors.
It can be used as design-free POL converters for a 5 V system
intermediate bus. It can be configured easily, reducing overall
design time, and allowing reuse of designs.
Miniaturization was achieved by high frequency switching
technology, allowing saving space on the application PCB.
Soldering capability has been significantly improved by
adoption of end face through holes.
Package: Module
20.3 × 11.4 × 4.2 mm
Applications:
• Communication devices
• Computer server
• Other low power conversion
Typical Application Circuit
VPG (5 V)
Power Good
VIN
ON/OFF
GND
BR205
ON/OFF VS+
PG VOUT
VIN RTRIM
GND
CIN RTRIM
VOUT
COUT
BR205-DS, Rev. 0.05E
February 6, 2013
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
Free Datasheet http://www.Datasheet4U.com






BR205 Datasheet, Funktion
BR205
POL Converter Module for 5 V System Intermediate Bus
Functional Description
Power Good ( PG) Operation
When output voltage, VOUT , is within the Power Good detection
range, the PG pin is disconnected internally by the MOSFET
switch. The signal at the Power Good node is pulled up to 5 V. If
VOUT falls out of the Power Good detection range, the MOSFET
switch connects PG to GND, and the signal at the Power Good
node is pulled low. The PG peripheral circuit is shown in figure 3.
Output Sensing ( VS+) and Compensation
Reduction in output voltage can be compensated by connecting
the output sense terminal, VS+ , to the load. When using LC filter,
the proper connection is shown in panel A of figure 4. Note: Do
not connect the output sense terminal to the output of the LC
filter. It may not operate normally.
CAUTION: When the output sense terminal is not used, it must
be connected directly to the VOUT output terminal. This is shown
in panel B of figure 4.
VPG(5V)
Power Good
GND
Figure 3. PG peripheral circuit
BR205
VOUT
(A)
VS+
GND
COUT
BR205
PG
GND
L
COL
External On/Off Output Control (ON/¯O¯¯F¯¯F¯)
Operation of the output of the product can be turned on and off by
using the On/Off function, irrespective of input voltage connec-
tion.
(B)
BR205
VOUT
VS+
This is enabled by connection of the ON/¯O¯¯F¯F pin (pin 1) (refer
to panel A of figure 5):
GND
COUT
• When the ON/¯O¯¯F¯F pin is open, the output voltage is on
• When the ON/¯O¯¯F¯F pin is connected to GND, the output voltage
is off
The ON/¯O¯¯F¯F pin is also used as a soft-start function. Do not con-
nect the ON/¯O¯¯F¯F pin to the other pins in parallel, and be sure to
connect the ON/¯O¯¯F¯F pin to a single switch device such as a FET
(see figure 5). Do not pull-up the ON/¯O¯¯F¯F pin from the external
voltage source.
Figure 4. VS+ peripheral circuit
BR205
ON/OFF
GND
CAUTION:
• The ON/¯O¯¯F¯F pin is pulled-up inside the BR205 converter.
Therefore, a voltage of 5.0 V is output to the ON/¯O¯¯F¯F pin.
• Do not feed voltage to the ON/¯O¯¯F¯F pin from outside BR205
converter.
Figure 5. ON/¯O¯¯F¯¯F¯ peripheral circuit
Load
Load
BR205-DS, Rev. 0.05E
SANKEN ELECTRIC CO., LTD.
6
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6 Page









BR205 pdf, datenblatt
BR205
POL Converter Module for 5 V System Intermediate Bus
• The contents in this document are subject to changes, for improvement and other purposes, without notice. Make sure that this is the
latest revision of the document before use.
• Application and operation examples described in this document are quoted for the sole purpose of reference for the use of the prod-
ucts herein and Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights or
any other rights of Sanken or any third party which may result from its use.
• Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semicon-
ductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures
including safety design of the equipment or systems against any possible injury, death, fires or damages to the society due to device
failure or malfunction.
• Sanken products listed in this document are designed and intended for the use as components in general purpose electronic equip-
ment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.).
When considering the use of Sanken products in the applications where higher reliability is required (transportation equipment and
its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), and whenever
long life expectancy is required even in general purpose electronic equipment or apparatus, please contact your nearest Sanken sales
representative to discuss, prior to the use of the products herein.
The use of Sanken products without the written consent of Sanken in the applications where extremely high reliability is required
(aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited.
• In the case that you use Sanken products or design your products by using Sanken products, the reliability largely depends on the
degree of derating to be made to the rated values. Derating may be interpreted as a case that an operation range is set by derating the
load from each rated value or surge voltage or noise is considered for derating in order to assure or improve the reliability. In general,
derating factors include electric stresses such as electric voltage, electric current, electric power etc., environmental stresses such
as ambient temperature, humidity etc. and thermal stress caused due to self-heating of semiconductor products. For these stresses,
instantaneous values, maximum values and minimum values must be taken into consideration.
In addition, it should be noted that since power devices or IC's including power devices have large self-heating value, the degree of
derating of junction temperature affects the reliability significantly.
• When using the products specified herein by either (i) combining other products or materials therewith or (ii) physically, chemically
or otherwise processing or treating the products, please duly consider all possible risks that may result from all such uses in advance
and proceed therewith at your own responsibility.
• Anti radioactive ray design is not considered for the products listed herein.
• Sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of Sanken's distribu-
tion network.
• The contents in this document must not be transcribed or copied without Sanken's written consent.
BR205-DS, Rev. 0.05E
SANKEN ELECTRIC CO., LTD.
12
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