Fault Protected High Side Switch, LT1910
This product is designed to protect the load from over-current conditions using the LT1910 fault-protected high-side switch controller. When the internal drain comparator detects that the switch current exceeds the preset threshold, the LT1910 immediately turns off the switch and asserts a fault flag.
The switch remains off for approximately 150 ms, as determined by the external timing capacitor C3, and then automatically attempts to restart. If the fault condition persists, the protection cycle repeats until the fault is cleared, thereby safeguarding the MOSFET and the load. Once the switch restarts successfully, the fault flag is reset.
The LT1910 features a 50-mV trip point for current sensing, which determines the value of the shunt resistor. The board includes two selectable shunt resistor options — 0.01 Ω and 0.1 Ω — which can be configured using jumpers J1 and J2. A third option allows both shunt resistors to be used in parallel (by closing both jumpers J1 and J2), providing additional flexibility in setting the desired trip point.
Features
- 12V to 24V Power Supply Range
- Protected from –15V to 60V Supply Transients
- Short-Circuit Protected
- VCC 5V for Fault Pull-Up
- Automatic Restart Timer Approx 150mS
- Open-Collector Fault Flag with Pull Up, Normally High
- Fully Enhances N-Channel MOSFET Switches
- Programmable Current Limit, Delay Time and Auto Restart Period
- Voltage Limited Gate Drive
- Defaults to Off State with Open Input
- Turn On Time 75uS
- Turn Off Time 10uS
- Maximum Output Current Shunt Resistor 0.1 Ohm, Current 0.6A
- Maximum Output Current Shunt Resistor 0.01 Ohm, 6A
- 4 x 4 mm Mounting Holes
- PCB Dimensions 42.55 x 35.56 mm
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This product is designed to protect the load from over-current conditions using the LT1910 fault-protected high-side switch controller. When the internal drain comparator detects that the switch current exceeds the preset threshold, the LT1910 immediately turns off the switch and asserts a fault flag.
The switch remains off for approximately 150 ms, as determined by the external timing capacitor C3, and then automatically attempts to restart. If the fault condition persists, the protection cycle repeats until the fault is cleared, thereby safeguarding the MOSFET and the load. Once the switch restarts successfully, the fault flag is reset.
The LT1910 features a 50-mV trip point for current sensing, which determines the value of the shunt resistor. The board includes two selectable shunt resistor options — 0.01 Ω and 0.1 Ω — which can be configured using jumpers J1 and J2. A third option allows both shunt resistors to be used in parallel (by closing both jumpers J1 and J2), providing additional flexibility in setting the desired trip point.
Features
- 12V to 24V Power Supply Range
- Protected from –15V to 60V Supply Transients
- Short-Circuit Protected
- VCC 5V for Fault Pull-Up
- Automatic Restart Timer Approx 150mS
- Open-Collector Fault Flag with Pull Up, Normally High
- Fully Enhances N-Channel MOSFET Switches
- Programmable Current Limit, Delay Time and Auto Restart Period
- Voltage Limited Gate Drive
- Defaults to Off State with Open Input
- Turn On Time 75uS
- Turn Off Time 10uS
- Maximum Output Current Shunt Resistor 0.1 Ohm, Current 0.6A
- Maximum Output Current Shunt Resistor 0.01 Ohm, 6A
- 4 x 4 mm Mounting Holes
- PCB Dimensions 42.55 x 35.56 mm
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