Texas Instruments LM74202-Q1 Ideal Diode with Integrated FET
Texas Instruments LM74202-Q1 Ideal Diode with Integrated FET offers a full suite of protection features. The wide supply input range allows control of 12V automotive battery-driven applications. The LM74202-Q1 withstands and protects the loads from positive and negative supply voltages up to ±40V. Load, source, and device protection have many programmable features, including overcurrent, inrush current control, overvoltage, and undervoltage thresholds. The system design for ISO standard pulse testing is simplified using the internal robust protection control blocks along with the 40V rating of the device.
The device is placed in a low current shutdown mode with a shutdown pin providing external control for enabling and disabling the internal FETs. The LM74202-Q1 provides fault output and precise current monitor output for system status monitoring and downstream load control. The MODE pin allows flexibility to configure the LM74202-Q1 between the three current-limiting fault responses (circuit breaker, latch-off, and auto-retry modes). The device monitors V(IN) and V(OUT) to provide reverse current blocking when V(IN) < (V(OUT)-10mV). This function protects the system bus from overvoltages during output short to battery faults and also helps in voltage holdup requirements during power fail and brownout conditions.
The Texas Instruments LM74202-Q1 ideal diode is available in a 5mm × 4.4mm 16-pin HTSSOP and is fully specified over a –40°C to +125°C temperature range.
Features
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C ≤ TA ≤ +125°C
- AEC-Q100-012 short circuit reliability Grade A
- HBM ESD classification level 2
- CDM ESD classification level C6
- 4.2V to 40V operating voltage, 42V maximum
- Integrated reverse input polarity protection down to –40V
- Integrated back-to-back MOSFETs with 150mΩ total RON
- Transient immunity up to 55V
- 0.1A to 2.23A adjustable current limit (±5% accuracy at 1A)
- Load protection during ISO7637 and ISO16750-2 testing
- Short to battery and short to ground protection
- Reverse current blocking for protection from output short to battery
- IMON current indicator output (±8.5% accuracy)
- Low quiescent current (285µA in operating, 16µA in shutdown)
- Adjustable UVLO, OVP cut-off, inrush current control
- Selectable current-limiting fault response options (auto-retry, latch off, CB modes)
- Available in an easy-to-use 16-pin HTSSOP package
Applications
- Front camera, Rear camera
- Drive assist ECU
- Telematics control unit
- Cellular module asset tracking
Block Diagram
