Diodes Incorporated ZXNB4204JA16TC

Overview

ZXNB4204JA16TC from Diodes Incorporated is a single-chip LNB power management and control IC for satellite C-band low-noise block downconverters. It integrates regulated 12–20 V IF supply, zero-volt-gate FET switching, polarization voltage detection, programmable mixer/FET bias, and thermal protection - enabling compact, reliable single-LNB designs in set-top box receivers.

For engineers reviewing the ZXNB4204JA16TC datasheet, ZXNB4204JA16TC pinout, ZXNB4204JA16TC application, or ZXNB4204JA16TC equivalent, key selection criteria include its integrated LNB bias topology, polarization switching detection range (13/18 V), thermal-compensated FET gate drive, and minimal external component count (3 total) for domestic C-band LNB systems.

Technical Context

The ZXNB4204JA16TC implements a zero-volt gate switching architecture to eliminate false polarization toggling during transients. Its internal regulator delivers stable 12–20 V output with ±2% accuracy and supports up to 250 mA load current for IF amplifier stages.

Voltage detection circuitry discriminates between 13 V (vertical) and 18 V (horizontal) polarization control signals without external RC filtering. Temperature-compensated bias generation ensures GaAs/HEMT FET stability across –40°C to +85°C ambient operation.

Key Specifications

Pinout & Package

Package: 16-pin TSSOP (4.4 mm × 5.0 mm, 0.65 mm pitch), thermally enhanced for LNB ambient operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LNB bias and control applications.

Compared with ALM-1212-TR1G and SP1608C13A, ZXNB4204JA16TC uniquely integrates full FET bias control, IF regulation, and zero-volt switching in one package - reducing design risk, board space, and qualification effort for new C-band LNB platforms.

Availability

ZXNB4204JA16TC is available at Aetrix Electronics and suitable for C-band satellite LNBs, domestic set-top box receivers, and portable DBS front-ends requiring stable component supply, consistent thermal performance, and minimal external BOM count.

Supply support for ZXNB4204JA16TC 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the Philippines.

The ZXNB4204 belongs to Diodes' satellite communication power management product line, engineered specifically for cost-effective, high-reliability LNB modules in consumer and professional broadcast equipment.

FAQ

What is the maximum output current capability of the ZXNB4204JA16TC's VOUT pin?

The VOUT pin delivers up to 250 mA of regulated current at 12–20 V, sufficient to power typical IF amplifier chains in C-band LNBs. Current limit is internally set and non-adjustable; sustained overload triggers thermal shutdown at 150°C junction temperature.

Does the ZXNB4204JA16TC support both 13 V and 18 V polarization switching?

Yes - it features built-in voltage detection with thresholds of 13 V ±0.5 V (vertical) and 18 V ±0.5 V (horizontal). No external resistors or comparators are needed; detection is performed internally with hysteresis to prevent chatter during transition.

Can the FET gate bias voltages be adjusted independently for G1 and G2 pins?

Yes - each gate output (G1 and G2) is independently programmable using external resistor dividers connected to dedicated bias reference pins. This allows separate optimization of noise figure and gain for front-end and mixer-stage GaAs/HEMT FETs.

Is the ZXNB4204JA16TC qualified for extended temperature operation?

Yes - it is specified for operation from –40°C to +85°C ambient, with internal thermal protection activating at 150°C junction temperature. The TSSOP package includes thermal pad exposure optimized for LNB metal housing mounting.