LM1951T switching power mosfet amplifier ic chip Power Mosfet Transistor LM1951 Solid State 1 Amp Switch

General Description

The LM1951 is a high current, high voltage, high side (PNP) switch with a built-in error detection circuit.

The LM1951 is guaranteed to deliver 1 Amp output current and is capable of withstanding up to g85V transients. The built-in error detection provides an error flag output under the following fault conditions: output short to ground or supply, open load, current limit, overvoltage or thermal shutdown. The LM1951 will drive all types of resistive or inductive loads. The output has a built-in negative voltage clamp (& b30V) to provide a quick energy discharge path for inductive loads. The LM1951 features TTL and CMOS compatible logic input with hysteresis. Switching times, both turn on and turn off, are 2 ms (Cload k 0.005 mF). In addition, its quiescent current in the OFF state is typically less than 0.1 mA at room temperature and less than 10 mA over the entire operating temperature and voltage range.

The LM1951 features make it well suited for industrial and automotive applications.

Features

• 0.1 mA typical quiescent current (OFF state)
• 1 Amp output current guaranteed
• g85V transient protection
• Reverse voltage protection
• Negative output voltage clamp
• Error flag output
• Internal overvoltage shutdown
• Internal thermal shutdown
• Short circuit proof
• High speed switching (up to 50 kHz)
• Inductive or resistive loads
• Low ON resistance (1X maximum)
• TTL, CMOS compatible input with hysteresis
• Plastic TO-220 5-lead package
• ESD protected
• 4.5V to 26V operation

Absolute Maximum Ratings

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

Supply Voltage

Operational Voltage 26 V_DC

Sustained Voltage -40 V_DC ≧V_CC ≦ 85 V_DC

Transient Voltage Protection ±85V

(r -- 100 ms, 1% Duty Cycle, R_S ≧ 10Ω)

Pins 4, 5 26 V_DC

Power Dissipation (Note 1) Internally Limited

Load Inductance 1H

Operating Temperature Range (T_A) -40℃ to +125℃

Maximum Junction Temperature 150℃

Storage Temperature Range -65℃ to +150℃

Lead Temperature (Soldering, 10 sec.) 260℃

ESD Tolerance (Note 4): 2000V

Typical Application Circuit and Connection Diagram