SIP11203DB Datasheet, PDF (1/12 Pages) Vishay Siliconix – Demonstration Board

SiP11203 Demonstration Board
SiP11203DB
Vishay Siliconix
DEMONSTRATION BOARD TEST SETUP
FEATURES
This demonstration board test setup information
details the test procedure for using the SiP11203 dem-
onstration board and its associated host board. The
demonstration board is plugged vertically into the host
board. Only one orientation is possible for correct plug-
in. The input and output power leads and an optional
enable lead are wired into the host board connectors
as shown in Figure 1. A mechanical toggle switch is
also available on the host board for manual enabling
and disabling of the demonstration board. The host
board is configured by default for manual switch tog-
gling of enable/disable. If an electrical control signal is
preferred, this can be wired into the enable connector
J2. However, in this case the zero ohm link connected
in the R4 position must be removed and reconnected
in the R1 position, which is vacant by default. A 5 V
input to the enable pin disables the demonstration
board and a 0 V or open circuit input signal causes the
demonstration board to be enabled. Test pins are
available on the host board, at the input, output, and
enable pins, for the easy connection of scope probes.
These wiring connections are depicted in Figure 1. The
input connections should be wired as closely as possi-
ble to the power supply, using cable rated at 2 A or
more. However, lead lengths of up to a meter or two
are probably acceptable. If the leads are significantly
longer, a second input decoupling capacitor should be
connected in position C1, which is left blank by default.
At the load side, four 8 A rated wires should be con-
nected from both +Vout and -Vout terminals to the
load.
The Vsense terminals can be connected remotely to
the load terminals for good regulation at the load, but
this is not essential, as the Vsense terminals are con-
nected to the output terminals through 4.7 Ω resistors
on the demonstration board. A small fan should be
placed adjacent to the host board, blowing cooling air
over both vertical faces of the demonstration board.
There is over temperature protection within the dem-
onstration board, so the system will function without
fan cooling, but the demonstration board will disable
operation if the PCB temperature exceeds 85 ºC, and
will re-enable once the temperature drops to
75 ºC.
The rated input voltage range is 36 V - 75 V, and the
converter can operate at input voltage levels up to
100 V for 100 ms. The maximum rated load is 50 W.
The output voltage is regulated to 3.3 V with an output
load current range of 0 A - 15 A.
• High efficiency, > 87 % at full rated load current
• Delivers up to 15 amps of output current with mini-
mal de-rating - no heat sink required
• Wide input voltage range: 35 V - 75 V, with 100 V
100 ms input voltage transient capability
• No minimum load requirement means no preload
resistors required
• Remote sense for the output voltage compensates
for output distribution drops
• On/Off control referenced to input side
• Input under-voltage lockout disables converter at
low input voltage conditions
• Output short circuit protection protects converter
and load from permanent damage and consequent
hazardous conditions
• Output over-voltage protection protects load from
damaging voltages
• Thermal shutdown protects converter from abnor-
mal environmental conditions
To load
Airflow
Direction
Enable
(optional)
Vin-
Vin+
Figure 1. SiP11203 Test Board Layout
The information shown here is a preliminary product proposal, not a commercial product data sheet. Vishay Siliconix is not committed to produce
this or any similar product. This information should not be used for design purposes, nor construed as an offer to furnish or sell such products
Document Number: 74254
S-60997–Rev. A, 12-Jun-06
www.vishay.com
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