PBL3798 Key Features
- On-chip switch mode regulator to minimize power dissipation
- Programmable, constant current feed
- Line feed characteristics independent of battery variations
- Tip-ring polarity reversal function
- Tip and ring open circuit state; tip open with ring active state
- Detectors
- programmable loop current/ring ground detector
- ground key detector
- ring trip detector
- Ring and test relay drivers