STMicroelectronics STEVAL-CBL011V1

Overview

STEVAL-CBL011V1 from STMicroelectronics is a DiSEqC 1.X-compliant demonstration board based on the LNBH26 dual LNB supply and control IC. It provides regulated 13/18 V DC output, programmable 22 kHz tone generation, I²C-controlled voltage selection across 15 levels, integrated step-up DC-DC converter (93% efficiency at 0.5 A), and dynamic short-circuit protection for satellite LNB powering in dual-tuner receivers.

For engineers reviewing the STEVAL-CBL011V1 datasheet, STEVAL-CBL011V1 pinout, STEVAL-CBL011V1 application, or STEVAL-CBL011V1 equivalent, key selection criteria include DiSEqC 1.X compliance, dual-LNB current capability (up to 0.5 A per channel), factory-trimmed 22 kHz tone accuracy under no-load conditions, I²C address configuration, and integrated thermal/overload diagnostics via register bits.

Technical Context

The board implements the LNBH26 IC in a complete reference design for satellite receiver front-end power and control. It integrates a high-efficiency PWM step-up converter with internal N-MOSFET, low-drop post-regulator, and TTL-compatible DSQIN pin for direct DiSEqC envelope modulation.

Control is fully I²C-based with read/write access to status registers (overtemperature, overload, short-circuit flags) and configuration registers (output voltage level, current limit setting, LPM enable). The 22 kHz tone generator is internally trimmed and maintains waveform integrity even with zero load current.

Key Specifications

Availability

STEVAL-CBL011V1 is available at Aetrix Electronics and suitable for satellite TV receiver development, multiswitch design, and dual-LNB front-end validation requiring stable component supply, traceable sourcing, and long-term BOM continuity.

Supply support for STEVAL-CBL011V1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, analog chips, and sensors for industrial, automotive, and consumer applications.

The STEVAL-CBL011V1 belongs to ST's satellite interface evaluation board family, engineered specifically to accelerate DiSEqC-compliant LNB power and control system development with minimal external components and full I²C configurability.

FAQ

What is the primary function of the STEVAL-CBL011V1?

The STEVAL-CBL011V1 is a demonstration board that implements ST's LNBH26 IC to provide regulated 13/18 V DC power and 22 kHz tone signaling to satellite LNBs. It serves as a fully validated reference design for DiSEqC 1.X-compliant dual-LNB supply and control in satellite TV receivers and multiswitches.

Does the board support both single and dual LNB configurations?

Yes. The STEVAL-CBL011V1 is built around the LNBH26, which natively supports dual independent LNB channels - each with programmable voltage (13/18 V), current limiting, and DiSEqC envelope modulation. The board layout and firmware enable simultaneous or selective activation of both outputs.

How is DiSEqC communication implemented on this board?

DiSEqC communication is implemented via the LNBH26's DSQIN pin, which accepts TTL-level DiSEqC data envelopes. The board routes this signal directly to the LNB output connector. The internal 22 kHz tone generator is factory-trimmed and synchronized to the DSQIN input, ensuring compliant timing and waveform fidelity without external components.

Can the output current limit be adjusted, and how?

Yes. The output current limit is set by an external resistor connected between the ILIM pin and ground. The LNBH26 datasheet specifies a linear relationship: I_LIM = 1.25 V / R_ILIM. Typical values range from 0.3 A to 0.5 A, allowing design flexibility for different LNB load profiles and thermal constraints.