PSB2120 - ISDN Remote Power Controller
The reference provides a 4.0 V voltage for the regulation loop.
A high gain error amplifier compares the reference voltage with the switch mode supply output voltage.
The output of the error amplifier is compared with a periodic linear ramp, which is generated by the sawtooth-oscillator circuit.
The
PSB2120 Features
* q Switched mode DC/DC-converter q Switched mode DC/DC-converter q CCITT (I.430) ISDN compatible q Integrated 200 V power FET (only PSB 2120-P in P-DIP-22) q Low power dissipation q Supply voltage range 10 V to 60 V q Input undervoltage detection q Programmable overcurrent protection q Soft start q