LNBH26 STMicroelectronics, LNBH26 Datasheet - Page 11

• Manufacturer Part Number: LNBH26
• Description: Dual LNB supply and control IC with step-up and I2C interface
• Manufacturer: STMicroelectronics

LNBH26
2.21
If OLR=0, the involved output is automatically re-enabled as soon as the overload condition
is removed, and the OLF bit is reset to “0” after a register reading operation.
OTF: thermal protection and diagnostic
The LNBH26 is also protected against overheating: when the junction temperature exceeds
150 °C (typ.), the step-up converter and both liner regulators are shut off, the diagnostic
OTF bit in the STATUS1 register is set to “1” and the FLT pin is set to low level. After the
overtemperature condition is removed, normal operation can be resumed in two ways,
according to the THERM I²C bit on the DATA4 register.
If THERM=1, all VSEL bits are reset to “0” and both LNB outputs (V
To re-enable output stages, the VSEL bits must be set again by the microprocessor, while
the OTF bit is reset to “0” after a register reading operation.
If THERM=0, outputs are automatically re-enabled as soon as the overtemperature
condition is removed, while the OTF bit is reset to “0” after a register reading operation.
Doc ID 022771 Rev 1
Application information (valid for each section A/B)
OUT
pins) are disabled.
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