A8293
Single LNB Supply and Control Voltage Regulator
FEATURES AND BENEFITS
▪ 2-wire serial I2C™ -compatible interfac...
A8293
Single LNB Supply and Control Voltage
Regulator
FEATURES AND BENEFITS
▪ 2-wire serial I2C™ -compatible interface: control (write) and status (read)
▪ LNB voltages (8 programmable levels) compatible with all common standards including domestic Japan models
▪ Tracking switch-mode power converter for lowest dissipation ▪ Integrated converter switches and current sensing ▪ Provides up to 700 mA load current ▪ Static current limit circuit allows full current at startup and
13→18 V output transition; reliably starts wide load range ▪ Push-pull output stage minimizes 13→18 V and 18→13 V
output transition times for highly capacitive loads ▪ Adjustable rise/fall time via external timing capacitor ▪ Built-in tone oscillator, factory-trimmed to 22 kHz
facilitates DiSEqC™ tone encoding, even at no-load ▪ Four methods of 22 kHz tone generation, via I2C™ data
bits and/or external pin ▪ Auxiliary modulation input ▪ LNB overcurrent with timer ▪ Diagnostics for output voltage level, input supply UVLO
PACKAGES:
20-contact, 4 × 4 mm MLP/QFN (suffix ES)
DESCRIPTION
Intended for analog and digital satellite receivers, this single low noise block converter
regulator (LNBR) is a monolithic linear and switching voltage
regulator, specifically designed to provide the power and the interface signals to an LNB down converter via coaxial cable. The A8293 requires few external components, with the boost switch and compensation circuitry integrated inside of the device. A high switch...