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Specifications
SKU: 11243405
| Parameter | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VBB) | Operating supply voltage | 8.0 | - | 50.0 | V |
| Standby Current (ISB) | Quiescent current in standby mode | - | 20 | - | μA |
| Operating Temperature (TA) | Ambient operating temperature range | -40 | - | 150 | °C |
| Storage Temperature (TSTG) | Storage temperature range | -65 | - | 150 | °C |
| Thermal Resistance (θJA) | Junction-to-ambient thermal resistance | - | 60 | - | °C/W |
| Maximum Current (IMAX) | Maximum output current per phase | - | 1.5 | - | A |
| PWM Frequency (FPWM) | Pulse width modulation frequency | 10 | - | 20 | kHz |
| Dead Time (tD) | Minimum dead time between high-side and low-side switches | - | 1.0 | - | μs |
| Overcurrent Protection (OCP) | Overcurrent protection threshold | - | 2.0 | - | A |
| Thermal Shutdown (TSD) | Thermal shutdown temperature | - | 160 | - | °C |
| Fault Output (FO) | Fault output status | - | - | - | Open Drain |
Instructions for Using A3957SLB
Power Supply:
- Ensure the supply voltage (VBB) is within the specified range of 8.0V to 50.0V.
- Use a stable power source to avoid voltage fluctuations that can affect performance.
Thermal Management:
- Place the device on a heatsink or a PCB with good thermal conductivity to maintain the junction temperature below the maximum thermal shutdown temperature (160°C).
- Monitor the ambient temperature to ensure it remains within the operating range (-40°C to 150°C).
Current Limiting:
- Set the overcurrent protection (OCP) threshold to prevent damage from excessive current. The typical threshold is 2.0A.
- Use external resistors if necessary to fine-tune the current limit.
PWM Control:
- Set the PWM frequency (FPWM) between 10kHz and 20kHz for optimal performance.
- Ensure the dead time (tD) is at least 1.0μs to prevent shoot-through current.
Standby Mode:
- To enter standby mode, set the enable pin to a low state. The quiescent current (ISB) will be reduced to approximately 20μA.
Fault Monitoring:
- Monitor the fault output (FO) pin to detect any issues such as overcurrent, thermal shutdown, or other faults.
- The FO pin is open drain, so it requires a pull-up resistor to a suitable voltage level.
Storage:
- Store the device in a dry environment with temperatures between -65°C and 150°C to ensure long-term reliability.
Soldering:
- Follow recommended soldering profiles to avoid thermal stress on the device.
- Allow the device to cool down naturally after soldering to prevent thermal shock.
By following these instructions, you can ensure reliable operation and longevity of the A3957SLB.
(For reference only)Inquiry - A3957SLB
