17. LNB supply and control IC
ST LNBH23L
a) Key Features
-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93%
@0.5 A)
pecification
-in 22 kHz tone generator suits widely accepted standards
-drop post regulator and high efficiency step-up PWM with integrated power NMOS
allow low power losses
-temperature internal protections with I²C diagnostic bits
- 4 kV ESD tolerant on output power pins
Applications
te receivers
Description
Intended for analog and digital satellite receivers, the LNBH23L is a monolithic voltage
regulator and interface IC, assembled in QFN32 5 x 5 specifically designed to provide the 13 /
18 V power supply and the 22 kHz tone signalling to the LNB down-converter in the antenna
dish or to the multi-switch box. In this application field, it offers a complete solution with
extremely low component count, low power dissipation together with simple design and I²C
standard interfacing.
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