Overview
The LM9061M/NOPB, produced by Texas Instruments, is a high-side protection controller designed to drive and protect external power MOSFETs in various high-current applications. This device is part of the LM9061 family, which includes charge-pump circuits that generate the necessary gate drive voltage for high-side MOSFET configurations. The LM9061 is particularly suited for automotive and industrial applications due to its robust protection features and compatibility with CMOS logic inputs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| VCC Operating Range | 7 to 20 | V |
| Junction-to-Ambient Thermal Resistance (RθJA) | 150 | °C/W |
| Junction-to-Case (Top) Thermal Resistance (RθJC) | 46.7 | °C/W |
| Junction-to-Board Thermal Resistance (RθJB) | 49.1 | °C/W |
| Maximum Gate to Source Voltage (VGS) | 15 | V |
| ESD Classification (HBM) | Level 2 | - |
| ESD Classification (CDM) | Level C4B | - |
Key Features
- Qualified for Automotive Applications and AEC-Q100 certified.
- Withstands 60-V supply transients and overvoltage shut-OFF with VCC > 30 V.
- Lossless overcurrent protection latch-OFF without requiring a current-sensing resistor.
- Programmable delay of protection latch-OFF and gradual turnoff to minimize inductive load transient voltages.
- CMOS logic-compatible ON and OFF control input.
- Internal charge pump circuit generates gate voltage above the available VCC supply.
- Built-in 15-V Zener clamps the maximum gate to source voltage of the MOSFET.
Applications
- Transmission Control Units (TCU) and Engine Control Units (ECU).
- Valve, relay, and solenoid drivers.
- Lamp drivers and DC motor PWM drivers.
- Logic-controlled power supply distribution switches.
- Electronic circuit breakers.
- High-power audio speakers.
Q & A
- What is the primary function of the LM9061M/NOPB? The LM9061M/NOPB is a high-side protection controller that provides gate drive to external power MOSFETs and protects them from overcurrent and overvoltage conditions.
- What is the operating temperature range of the LM9061M/NOPB? The operating temperature range is -40°C to 125°C.
- What type of package does the LM9061M/NOPB come in? It comes in an 8-pin SOIC (D) package.
- How does the LM9061M/NOPB protect against overcurrent? It monitors the voltage drop (VDS) across the MOSFET and latches OFF if the VDS exceeds a programmable threshold voltage, without requiring a current-sensing resistor.
- Is the LM9061M/NOPB suitable for automotive applications? Yes, it is qualified for automotive applications and is AEC-Q100 certified.
- What is the maximum gate to source voltage (VGS) that the LM9061M/NOPB can handle? The maximum VGS is clamped to 15 V by a built-in Zener diode.
- How does the LM9061M/NOPB handle overvoltage conditions? It shuts off the MOSFET if VCC exceeds 30 V and returns to normal operation once VCC is within the normal operating range.
- Can the LM9061M/NOPB be used with multiple parallel-connected MOSFETs? Yes, it can drive multiple parallel-connected MOSFETs for very high current applications.
- What is the purpose of the internal charge pump in the LM9061M/NOPB? The internal charge pump generates a gate voltage above the available VCC supply to drive the high-side MOSFET.
- How does the LM9061M/NOPB minimize inductive load transient voltages? It uses a gradual turnoff characteristic by discharging the gate capacitances of the MOSFET with a 110-µA current sink.
