深圳市中立信电子科技有限公司

ISL9492ERZ-T

Single Output LNB Supply and Control Voltage Regulator with I2C Interface for  Satellite Set-Top Box Designs

线性稳压器 SING OUTPUT LNB SUPP VAGEG FOR SATELLITE

The ISL9492ERZ-T ISL9492 is a highly integrated voltage regulator and  interface IC specifically designed for supplying power and  control signals from advanced satellite set-top box (STB)  modules to the low noise blocks (LNB) of a single antenna port.  It also supports DiSEqC tone generation and modulation with  diagnostic status read-back. Controlling the ISL9492 is simple  via the I2C bus by writing 8 bit words onto the System  Registers (SR).

Features ISL9492ERZ-T

• Single-Chip Power Solution

- Operation for 1-Tuner/1-Dish Applications

- Integrated DC/DC Converter and I2C Interface

• Integrated Boost MOSFET

• Switch-Mode Power Converter for Lowest Dissipation

- 490kHz Boost Switching Frequency

- Boost PWMs with > 92% Efficiency

- Selectable 13.5V or 18.5V Outputs

- I2C and Pin Controllable Output

• 31V Output Back-Bias Capability

• Built-in Tone Oscillator Factory

- Facilitates DiSEqC (EUTELSAT) Encoding

- Trimmed to 22kHz

- External Modulation Input

• DiSEqC 2.0 Support and Diagnostics

• Internal Overvoltage, Undervoltage, Overcurrent Protection,

Over-Temperature Flags Accessible through the I2C Interface

and Fault Signal Status Pin

• Short-Circuit Protection

Applications ISL9492ERZ-T

• LNB Power Supply and Control for Satellite Set-Top Box