General Description

The TH3122 consists of a low drop voltage regulator 5V/100mA and a K-Bus transceiver. The transceiver is suitable for K-Bus systems conform to ISO 9141.

The combination of voltage regulator and bus transceiver in combination with the monitoring functions make it possible to develop simple, but powerful and cheap nodes in K-Bus systems.

The wide output current area and the configurable reset time and reset voltage works together with many different microcontrollers.

Features and Benefits

❐ K-Bus Transceiver:

▪ PNP-open emitter driver with slew rate control and current limitation

▪ BUS input voltage -24V ... 30V (independently of VS)

▪ ISO 9141 and ODBII compliant

▪ Possibility of BUS wake up

❐ Operating voltage VS = 5.5 ... 16 V

❐ Very low standby current consumption <100 µ A in normal mode (< 50 µ A in sleep mode)

❐ Linear low drop voltage regulator:

▪ Output voltage 5V± 2

▪ Output current max. 100mA

▪ Output current limitation

❐ Overtemperature shutdown

❐ Configurable reset time (15ms/100ms) and reset threshold voltage (3.15V / 4.65V)

❐ Low voltage detection at VS

❐ Wake-up by K-BUS traffic and start-up capable independent of EN voltage level

❐ Universal comparator with an input voltage range –24V … 30V and digital output

❐ Load dump protected (40V)