特点
Programmable Trip Delay: 15μs to >100ms
Programmable Trip Current: 1mA to >20A
Programmbale Auto-Reset Time: 1ms to >10 sec.
4.5V to 18V Supply Range
Drives Low RDS(ON) N-Channel MOSFETs
Status Output Indicates Fault Condition
Thermal Trip with PTC Thermistor
8μA IQ in Standby Mode
No External Charge Pump Capacitors
Available in 8-Pin SOIC
典型应用
典型应用
描述
描述 The LTC1153 electronic circuit breaker drives a low cost N-channel MOSFET to interrupt power to a sensitive electronic load in the event of an over-current condition. The breaker remains tripped for a period of time set by an external timing capacitor and then is automatically reset. This cycle continues until the over-current condition is removed, protecting both the sensitive load and the MOSFET switch. The trip current, trip delay time and auto-reset period are programmable over a wide range to accommodate a variety of load impedances. An active high shut down input is also provided and interfaces directly to a PTC thermistor for thermal circuit breaking. An open-drain output is provided to report breaker status to the μP. TheLTC1153 is available in both 8-pin DIP and 8-pin SOIC packages.