STEVAL-LNBH02 Datasheet, PDF (1/4 Pages) STMicroelectronics – Power supply evaluation board for LNB based on the LNBH25S

STEVAL-LNBH02
Power supply evaluation board for LNB based on the LNBH25S
Data brief
Features
 Complete interface between LNB and I²C
bus
 Built-in DC-DC converter for single 12 V
supply operation and high efficiency (typ.
93% at 0.5 A)
 Selectable output current limit by external
resistor
 Compliant with main satellite receivers
output voltage specification (15
programmable levels)
 Accurate built-in 22 kHz tone generator suits
widely accepted standards
 22 kHz tone waveform integrity guaranteed
also at no load condition
 Low drop post regulator and high efficiency
step-up PWM with integrated power N-MOS
for low power losses
 LPM function (low power mode) to reduce
dissipation
 Overload and overtemperature internal
protection with I²C diagnostic bits
 LNB short-circuit dynamic protection
 +/- 4 kV ESD tolerant on output power pins
 RoHS compliant
Description
This evaluation board implements a DC-DC
converter based on the LNBH25S device. It is
used to power LNBs inside dish antennas to
receive satellite TV signals.
The LNBH25S is an integrated solution for
supplying / interfacing satellite LNB modules in
accordance with international standards. It is a
simple and complete solution for dual tuner
satellite receivers and provides high performance
at low cost with a low external component count.
The LNBH25S evaluation board includes an I²C
bus interface and an internal 22 kHz tone
generator which is factory trimmed and can be
controlled by the DSQIN pin (TTL compatible),
allowing immediate DiSEqC™ data encoding.
Thanks to a fully integrated step-up DC-DC
converter, it functions with a single input voltage
supply source ranging from 8 V to 16 V.
September 2016
DocID029704 Rev 1
For further information contact your local STMicroelectronics sales
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