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Last Updated : 2004/12/07
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Bellnix Ultra High Efficiency, Ultra Small Size, Step-Down DC-DC Converter
40W BSI-POWER Series
Ultra High Efficiency Step Down DC-DC Converters/BSI 40Watt Series
Ultra High Efficiency (95%), MinimumSize Step-Down DC-DC Converter
Input : 5V , 12V
Input : 12V
Output: 3.3V(1.0V- 3.3V)
Output: 5.0V(5.0V- 6.0V)
- Input Voltage Range 4.5V-13.6V
- Output Voltage Range 1.0V-3.3V
                                       5V-6V
- Latest Technology, Synchronous

  Rectification Circuit
- Efficiency 93%-95%
- Heat Sink Not Required
- Adjustable Output Voltage
- Non-lsolated Type Converter
- Short Circuit, Over-Current   Protection
- No Electrolytic Capacitor, No   Tantalum Capacitor
- Minimum Size
- Remote ON/OFF Control
· MTBF 900,000Hrs
- Operating Temp. Range
-10C to +70C
iTemp. derating requiredj
- Higt Reliability, High Performance
- 40W+40W=80W
  Parallel Operation Possible
  (Application note available)

Models
BSI-mini Series
Input V
Vdc
Output V
Vdc
Output I
A
Input Reg
%(typ)
Load Reg
%(typ)
Noise
mVpp(typ)
Efficiency
%(typ)
BSI-3.3S12R0F 4.5 -13.6 3.3
(1.0-3.3)
0-12 *1 10 8 40 93
BSI-5.0S8R0F 8-13.6 5.0
(5.0-6.0)
0-8 *1 60 95
Note 1: The output voltage inside the ( ) indicates the adjistable range.
Note 2: External capacitors are required.
*1 Depending on conditions, air flow is required.

<Outline>
- BSI-3.3S12R0F / BSI-5.0S8R0F
Dimensions: mm
Weight: 13g typ
Tolerance when nothing specified: ±0.5
External is non-coated.
-Note!
  This catalogue is outline of the products. When desinging, be sure to refer to the date sheets.
__<Standard Connection Circuit Diagram>
- Extenal Capacitor
@C1: 68µF(ESR=34m OHM oe less)~2PCA or more *2 (Recommended: OS-CON)
          *2 BSI-5.0S8R0F: 1pce more
    C2 ( Vout=3.3V): 220µF ( ESR=28m ohm or less) ~@2pcs or more (Recommended: OS-CON)
    C2 ( Vout=5.0V): 150µF ( ESR=30m ohm or less) ~@1pcs or more (Recommended: OS-CON)
    C2 ( Vout<1.7V): 330µF ( ESR=25m ohm or less) ~@3pcs or more (Recommended: OS-CON)
- ON/OFF Control
    ON/OFF control is controlled by opening and between 1 pin ( ON/OFF) and 2 pin ( S.GND) .
    Output ON = Open ( Max. 6V occurs at 1pin)
    Output OFF = Short ( 0-0.5V 500µA max.)
- Additional Capacitor
   The putput Voltage is adjustable by connecting a resistor beween 11pin (V.ADj1) and 12pin (V.ADJ2).
    When beween 11and 12pin is open, the follwing rating voltage is output.
    BSI-3.3S12R0F=3.3V±4%
    BSI-5.0S8R0F=5.0V±4%

- Remote Sensing
    9pin(+Vs), 6pin(-Vs) are remote sensing pins. Be sure to wire without making loops.
  * Lead-free pin have been corresponded serially since January, 2004
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BDD2004.04B(EV)