LNBH23L Datasheet, PDF (1/25 Pages) STMicroelectronics – Selectable output current limit by external resistor

LNBH23L
LNB supply and control IC with step-up and I²C interface
Features
■ Complete interface between LNB and I²C bus
■ Built-in DC-DC converter for single 12 V supply
operation and high efficiency (typ. 93% @ 0.5
A)
■ Selectable output current limit by external
resistor
■ Compliant with main satellite receivers output
voltage specification
■ Auxiliary modulation input (EXTM pin)
facilitates DiSEqC™ 1.X encoding
■ Accurate built-in 22 kHz tone generator suits
widely accepted standards
■ Low-drop post regulator and high efficiency
step-up PWM with integrated power NMOS
allow low power losses
■ Overload and over-temperature internal
protections with I²C diagnostic bits
■ LNB short circuit dynamic protection
■ ± 4 kV ESD tolerant on output power pins
Applications
■ STB satellite receivers
■ TV satellite receivers
■ PC card satellite receivers
QFN32 (5 x 5 mm)
(Exposed pad)
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.
Table 1.
Device summary
Order code
LNBH23LQTR
Package
QFN32 (5 x 5 mm) Exposed pad
November 2010
Doc ID 15335 Rev 4
Packaging
Tape and reel
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