Key facts
- Brand
- STMicroelectronics
- Model
- LNBH25
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-10
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STMicroelectronics LNBH25L LNB Supply Control IC Datasheet
The LNBH25L is a monolithic voltage regulator and interface IC designed for analog and digital satellite receivers and PC cards. It integrates a DC-DC step-up converter and an I2C interface to provide the 13 V or 18 V power supply and 22 kHz tone signaling required for LNB down-converters.
The device features a built-in DC-DC converter that operates from a single 8 V to 16 V supply, achieving high efficiency with a typical output of 93% at 0.5 A. It includes selectable output current limits, accurate 22 kHz tone generation compliant with DiSEqC standards, and various protection mechanisms such as overload, overtemperature, and short-circuit protection.
STMicroelectronics LNBH25 specifications
| Supply Voltage Range | 8 V to 16 V |
|---|---|
| Efficiency | typ. 93% @ 0.5 A |
| Package Type | QFN24 (4 x 4) |
| Undervoltage Lockout Threshold | 4.7 V typ. |
| Soft-start Time (13V) | 4ms typ. |
| Soft-start Time (18V) | 6 ms typ. |
| Max Output Current Limit | 750 mA |
Source: STMicroelectronics LNBH25L LNB Supply Control IC Datasheet
All STMicroelectronics LNBH25 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the typical efficiency of the LNBH25L at 0.5 A?
The typical efficiency is 93% at a 0.5 A load.
From: STMicroelectronics LNBH25L LNB Supply Control IC Datasheet
How is the output current limit selected?
The current limit threshold is set by an external resistor connected to the ISEL pin.
From: STMicroelectronics LNBH25L LNB Supply Control IC Datasheet
What is the minimum supply voltage for the LNBH25?
The device requires a single source voltage between 8 V and 16 V.
From: STMicroelectronics LNBH25 LNB Supply and Control IC Datasheet
Does the LNBH25 include a 22 kHz tone generator?
Yes, it includes an accurate built-in 22 kHz tone generator suitable for widely accepted standards.
From: STMicroelectronics LNBH25 LNB Supply and Control IC Datasheet