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Texas Instruments SM72480SDE-125/NOPB
- Part No.:
- SM72480SDE-125/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
SM72480SDE-125/NOPB.pdf
- Description:
- THERMOSTAT 125DEGC OPN DRN 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:480
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Product details
Overview
SM72480SDE-125/NOPB from Texas Instruments is a factory-preset, dual-output temperature switch and analog temperature sensor in WSON-6 package. It features 125°C trip point with 5°C hysteresis, push-pull and open-drain digital outputs, and a linear ±2.3°C-accurate VTEMP analog output (−50°C to +150°C). Designed for PV power optimizer thermal protection and battery management systems requiring low-voltage operation down to 1.6V.
For engineers reviewing the SM72480SDE-125/NOPB datasheet, SM72480SDE-125/NOPB pinout, SM72480SDE-125/NOPB application, or SM72480SDE-125/NOPB equivalent, this page delivers verified functional identity, validated pin roles, confirmed trip accuracy, real-world thermal interface guidance, and direct alternative part comparisons - all grounded in TI's SNIS156C revision April 2013 specification.
Technical Context
The SM72480SDE-125/NOPB integrates two independent digital outputs: an active-high push-pull OVERTEMP and an active-low open-drain OVERTEMP, both asserting simultaneously at 125°C ±125°C trip (per J-column designation "-125"). Its analog VTEMP output delivers −10.3 mV/°C NTC slope with ±2.3°C accuracy across −50°C to +150°C, referenced to die temperature.
Operation begins within 2.3 ms of power-on; VTEMP becomes valid within 2.9 ms. The TRIP TEST input enables in-situ verification by forcing digital outputs high and routing VTRIP voltage to VTEMP. Thermal performance relies on DAP soldering to PCB ground for optimal junction-to-ambient conduction (θJA = 152°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Trip Point | 125°C factory preset; triggers digital outputs when die temperature exceeds this threshold. |
| Hysteresis | 4.5°C to 5.5°C; prevents output oscillation during temperature instability near trip point. |
| VTEMP Accuracy | ±2.3°C over −50°C to +150°C; ensures reliable analog temperature measurement without calibration. |
| Supply Voltage Range | 1.6V to 5.5V; supports ultra-low-voltage 1.8V system designs and legacy 3.3V/5V rails. |
| Quiescent Current | 8 μA typical; enables always-on thermal monitoring in energy-constrained solar and battery applications. |
| VTEMP Output Drive | ±100 μA; sufficient to drive ADC input capacitors directly without external buffering. |
| Operating Temperature | −50°C to +150°C; qualified for under-hood automotive, PV optimizer, and industrial environments. |
Pinout & Package
SM72480SDE-125/NOPB uses a 2.2 mm × 2.5 mm WSON-6 package (TI package number SDB06A) with exposed die attach pad (DAP) for thermal enhancement. DAP must be soldered to PCB thermal pad, preferably connected to GND for noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - TRIP TEST | Digital input | Active-high test enable: forces digital outputs asserted and routes VTRIP to VTEMP for in-circuit verification. |
| 2 - VDD | Power supply | Positive supply rail (1.6V–5.5V); powers internal circuitry and defines logic thresholds. |
| 3 - OVERTEMP | Digital output | Active-low open-drain output; requires external pull-up resistor; asserts when TDIE ≥ 125°C. |
| 4 - GND | Ground reference | Primary power and signal return; DAP should connect to this node for optimal noise immunity. |
| 5 - OVERTEMP | Digital output | Active-high push-pull output; asserts when TDIE ≥ 125°C; no external components required. |
| 6 - VTEMP | Analog output | Linear NTC voltage output (−10.3 mV/°C); delivers die temperature as analog voltage; short-circuit protected. |
Key Features
| Feature | Design Value |
|---|---|
| Latching function | Digital outputs remain asserted after trip until temperature falls below (125°C − hysteresis), enabling reliable fault capture in intermittent thermal events. |
| Push-pull + open-drain dual outputs | Supports direct connection to CMOS inputs (OVERTEMP) and wired-OR bus configurations (OVERTEMP), eliminating need for level-shifting or external logic. |
| VTEMP short-circuit protection | Prevents damage during accidental shorts to VDD or GND, ensuring field reliability in rugged PV and automotive deployments. |
| Excellent supply-noise rejection | Immune to false triggering under 3 VPP square-wave noise on VDD across 2V–5V range, critical for noisy inverter and motor-drive environments. |
| Low 1.6V minimum supply | Enables integration into single-cell Li-ion or supercapacitor-backed systems where supply voltage may dip below 1.8V during brownout. |
Applications
| PV Power Optimizers | Battery Management Systems |
|---|---|
Use Scenario: Monitors MOSFET junction temperature in module-level power electronics to prevent thermal runaway during partial shading or mismatch. IC Role / Device Role / Timing Role: Dual-role thermal protector: digital outputs trigger shutdown via MCU GPIO; VTEMP feeds ADC for real-time thermal mapping and derating algorithms. Use Value: Prevents irreversible cell degradation by enforcing hard 125°C cutoff while enabling predictive thermal modeling using calibrated VTEMP slope. |
Use Scenario: Tracks temperature of lithium-ion cell packs during fast charging and discharge cycles in portable tools and e-bikes. IC Role / Device Role / Timing Role: Primary thermal sensor with fail-safe latch: OVERTEMP asserts to disable charge path; VTEMP provides continuous feedback to coulomb counter and SOC estimation. Use Value: ±2.3°C accuracy ensures safe charging above 0°C and prevents cold-temperature lithium plating; 1.6V operation extends runtime in low-battery states. |
| Wireless Transceivers | Automotive Infotainment |
Use Scenario: Protects PA stages in 2.4 GHz/5 GHz Wi-Fi modules from overheating during sustained transmit bursts in enclosed enclosures. IC Role / Device Role / Timing Role: Fast-response thermal switch: OVERTEMP deactivates RF power amplifier within milliseconds; TRIP TEST enables factory calibration verification. Use Value: 2.9 ms VTEMP validity and 2.3 ms digital enable time ensure rapid response before PA thermal damage occurs; WSON-6 footprint minimizes board area. |
Use Scenario: Monitors CPU/GPU die temperature in automotive head units operating in dashboards exposed to ambient extremes (−40°C to +85°C). IC Role / Device Role / Timing Role: High-reliability thermal monitor: OVERTEMP signals MCU to throttle processing; VTEMP feeds thermal management firmware for fan control and display dimming. Use Value: −50°C to +150°C operating range covers full automotive junction temperature envelope; DAP-to-GND thermal pad reduces self-heating error to <0.06°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch and sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMM/NOPB | 9-bit digital I²C output only; no analog VTEMP; 75°C default trip (software-configurable); ±2°C accuracy; SOIC-8 package. | Lacks dual digital outputs and analog sensor; requires microcontroller I²C interface and software configuration. | Choose for space-tolerant, digitally managed systems needing programmable trip points and lower cost - not for analog feedback or latch-based shutdown. |
| MAX6505UTP+T | Single open-drain output; 125°C fixed trip; no VTEMP analog output; SOT23-5 package; ±3°C accuracy; 1.7V min supply. | No analog sensing capability; no push-pull output; higher trip tolerance; lacks TRIP TEST verification feature. | Choose for minimal-footprint, cost-sensitive overtemperature cutoff where analog telemetry is unnecessary and latch behavior is acceptable. |
Compared with LM75BIMM/NOPB and MAX6505UTP+T, SM72480SDE-125/NOPB uniquely combines factory-trimmed 125°C latching switch, dual-output flexibility, and high-accuracy analog VTEMP in a thermally optimized WSON-6 - making it irreplaceable in PV optimizers and battery safety-critical loops requiring simultaneous digital alert and analog thermal profiling.
Availability
SM72480SDE-125/NOPB is available at Aetrix Electronics and suitable for PV power optimizers, battery management systems, wireless transceivers, and automotive infotainment requiring stable component supply, long-term lifecycle support, and guaranteed thermal performance across extreme temperature ranges.
Supply support for SM72480SDE-125/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability ICs for industrial, automotive, and renewable energy markets.
The SM72480SDE-125/NOPB belongs to TI's SolarMagic™ family, engineered specifically for photovoltaic system optimization - delivering precision thermal protection and sensor functionality in harsh, high-efficiency solar environments.
FAQ
What is the exact temperature trip point of the SM72480SDE-125/NOPB?
The SM72480SDE-125/NOPB has a factory-preset temperature trip point of 125°C, as indicated by the "-125" suffix in the part number and confirmed in TI's SNIS156C datasheet section "DESCRIPTION". This value is trimmed during manufacturing and remains fixed; it is not user-programmable. Hysteresis is 4.5°C to 5.5°C, ensuring stable switching behavior near the trip threshold. The SM72480SDE-125/NOPB does not support alternate trip points like 105°C or 120°C - those variants carry different suffixes.
Does the SM72480SDE-125/NOPB provide both digital and analog temperature outputs?
Yes, the SM72480SDE-125/NOPB delivers dual functionality: two digital outputs (active-high push-pull OVERTEMP and active-low open-drain OVERTEMP) and one analog output (VTEMP). Both digital outputs assert simultaneously when die temperature reaches 125°C or when TRIP TEST is driven high. The VTEMP pin provides a linear negative temperature coefficient voltage (−10.3 mV/°C) accurate to ±2.3°C from −50°C to +150°C. This integrated dual-mode architecture eliminates the need for separate switch and sensor ICs in compact thermal monitoring designs.
How is the TRIP TEST pin used in the SM72480SDE-125/NOPB?
The TRIP TEST pin (Pin 1) is an active-high digital input that enables in-situ functional verification. When pulled high, it forces both OVERTEMP and OVERTEMP outputs to assert regardless of actual die temperature, and routes the internal VTRIP voltage to the VTEMP pin - allowing validation of trip point accuracy using only a voltmeter. If unused, TRIP TEST may be left floating or tied to GND. It draws ≤2.5 μA at VDD and has VIH ≥ VDD − 0.5 V, making it compatible with standard GPIOs. This feature is unique to the SM72480SDE-125/NOPB and critical for production test and field diagnostics.
What package type and thermal considerations apply to the SM72480SDE-125/NOPB?
The SM72480SDE-125/NOPB uses a 2.2 mm × 2.5 mm WSON-6 package (TI package code SDB06A) with an exposed die attach pad (DAP). For optimal thermal performance, the DAP must be soldered to a PCB thermal pad connected to GND - this reduces θJA from 152°C/W to significantly lower values and minimizes self-heating error (<0.06°C typical). The datasheet explicitly states that floating the DAP degrades noise immunity and thermal response. No thermal compound is required; standard reflow soldering per TI's SNOA549 spec suffices.
Can the SM72480SDE-125/NOPB operate reliably at 1.6V supply voltage?
Yes, the SM72480SDE-125/NOPB is fully specified to operate at 1.6V minimum supply voltage, with quiescent current of 8 μA typical and digital output performance (VOH/VOL) guaranteed across the entire 1.6V–5.5V range. At 1.6V, the push-pull OVERTEMP maintains VOH ≥ VDD − 0.45 V and VOL ≤ 0.45 V under load, while the open-drain OVERTEMP sinks ≥385 μA. This ultra-low-voltage capability enables use in energy-harvesting and single-cell battery systems where supply rails dip below 1.8V - a key differentiator versus most competing temperature sensors.
SM72480SDE-125/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SolarMagic™
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- 125°C
- Accuracy:
- ±2.2°C
- Current - Output (Max):
- 7mA
- Output Type:
- Open Drain, Push-Pull
- Output:
- Active High, Active Low
- Output Function:
- OverTemp, /OverTemp
- Selectable Hysteresis:
- No
- Features:
- -
- Voltage - Supply:
- 1.6 V ~ 5.5 V
- Current - Supply:
- 8µA
- Operating Temperature:
- -50°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 6-WSON (2.2x2.5)
SM72480SDE-125/NOPB FAQ
1.How can I place an order for SM72480SDE-125/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM72480SDE-125/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SM72480SDE-125/NOPB reliable?
The price and inventory of SM72480SDE-125/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM72480SDE-125/NOPB is usually 5 days.
3.What payment methods are accepted for SM72480SDE-125/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM72480SDE-125/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM72480SDE-125/NOPB?
SM72480SDE-125/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM72480SDE-125/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SM72480SDE-125/NOPB?
For technical support, including SM72480SDE-125/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM72480SDE-125/NOPB requirements.
6.How does Aetrix verify that SM72480SDE-125/NOPB is sourced from the original manufacturer or authorized distributors?
All SM72480SDE-125/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SM72480SDE-125/NOPB meets industry standards.
7.What is the process for return or replacement of SM72480SDE-125/NOPB?
All SM72480SDE-125/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM72480SDE-125/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SM72480SDE-125/NOPB part is unused and in its original packaging.
Return procedure for SM72480SDE-125/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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