SLIN-12E1A0 BEL [Bel Fuse Inc.], SLIN-12E1A0 Datasheet - Page 19

• Manufacturer Part Number: SLIN-12E1A0
• Description: NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs
• Manufacturer: BEL [Bel Fuse Inc.]

Power Good
The SLIN-12E1Ax modules provide a Power Good (PGOOD) signal that is implemented with an open-drain
output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal
will be de-asserted to a low state if any condition such as over temperature, over current or loss of regulation
occurs that would result in the output voltage going ±10% outside the set point value. The PGOOD terminal
should be connected through a pull-up resistor (suggested value 100KΩ) to a source of 5VDC or less.
Synchronization
The SLIN-12E1Ax modules can be synchronized using an external signal. Details of the SYNC signal are
provided in the Electrical Specifications table. If the synchronization function is not being used, leave the SYNC
pin floating.
Tunable Loop
The SLIN-12E1Ax modules have a new feature that optimizes transient response of the module called Tunable
Loop
External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and
noise and to reduce output voltage deviations from the steady-state value in the presence of dynamic load
current changes. Adding external capacitance however affects the voltage control loop of the module, typically
causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause
the module to become unstable.
The Tunable Loop
connected to the output of the module. The Tunable Loop
the SENSE and TRIM pins of the module, as shown below. This R-C allows the user to externally adjust the
voltage loop feedback compensation of the module.
Recommended values of R
and 3. Table 2 shows the recommended values of R
capacitors up to 470uF that might be needed for an application to meet output ripple and noise requirements.
Selecting R
In applications with tight output voltage limits in the presence of dynamic current loading, additional output
capacitance will be required. Table 3 lists recommended values of R
voltage deviation limits for some common output voltages in the presence of a 6A to 12A step change (50% of
full load), with an input voltage of 12V.
November 5, 2009
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs
TM
.
Circuit diagram showing connection of R
TUNE
and C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] •
TM
TM
TUNE
allows the user to externally adjust the voltage control loop to match the filter network
according to Table 2 will ensure stable operation of the module.
TUNE
and C
TUNE
MODULE
for different output capacitor combinations are given in below Tables 2
GND
SENSE
VOUT
TRIM
TUNE
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
and C
TUNE
TM
is implemented by connecting a series R-C between
TUNE
RTUNE
CTUNE
RTrim
and C
to tune the control loop of the module
C O
TUNE
TUNE
for different values of ceramic output
and C
TUNE
in order to meet 2% output
www.belfuse.com
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