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STMicroelectronics TSM1011AID
- Part No.:
- TSM1011AID
- Manufacturer:
- STMicroelectronics
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TSM1011AID.pdf
- Description:
- IC VREF SERIES 1% 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,739
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Product details
Overview
TSM1011AID from STMicroelectronics is a dual-loop CV/CC controller IC for secondary-side regulation in flyback adapters and battery chargers, featuring 0.5% precision 2.545 V reference, two transconductance op-amps with ORed outputs, and 2 kV ESD protection. It operates from 4.5 V to 28 V supply and supports 0–105 °C ambient range in SO-8 package.
For engineers reviewing the TSM1011AID datasheet, TSM1011AID pinout, TSM1011AID application, or TSM1011AID equivalent, this device enables precise voltage and current regulation in isolated AC/DC power supplies where secondary-side feedback via optocoupler is required, with full compensation access and low external component count.
Technical Context
The TSM1011AID integrates two independent transconductance operational amplifiers whose sinking outputs are wired in common-collector (OR) configuration - ensuring that either voltage or current loop violation triggers optocoupler activation. Its internal 2.545 V reference (0.5% initial accuracy) feeds both control loops, enabling simultaneous CV and CC regulation without external reference components.
Voltage control uses CV+ and CV− inputs with programmable setpoint via resistor divider; current control uses CC+ and CC− with external sense resistor and reference-derived threshold. Both op-amps support full external compensation via accessible output and inverting input pins, allowing stability optimization across load and line variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage reference | 2.545 V ±0.5% at 25 °C - enables accurate CV setpoint without trimming resistors |
| Supply voltage range | 4.5 V to 28 V - supports wide-input adapters and withstands clamp transients |
| Operating temperature | 0 °C to 105 °C - qualified for industrial-grade charger and adapter environments |
| Input offset voltage | 0.5 mV typical - minimizes CV/CC regulation error under varying thermal conditions |
| Transconduction gain | 3.5 mA/mV typical - defines current loop sensitivity to sense voltage errors |
| ESD protection | 2 kV HBM - ensures robustness during board handling and system integration |
| Output short-circuit current | 27–50 mA sink - drives standard optocoupler LEDs directly without buffer stage |
Pinout & Package
Package: SO-8 (Small Outline, 150 mil width), RoHS-compliant ECOPACK® grade, thermal resistance RthJA = 175 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VRef | Analog output | Stable 2.545 V reference source for both CV and CC divider networks |
| CC− | Analog input | Inverting input of current-control op-amp; connects to low-side of sense resistor |
| CC+ | Analog input | Non-inverting input of current-control op-amp; connects to reference-derived threshold |
| CV− | Analog input | Inverting input of voltage-control op-amp; connects to output voltage divider midpoint |
| CV+ | Analog input | Non-inverting input of voltage-control op-amp; connects to VRef for fixed reference |
| GND | Power supply | 0 V reference plane for all analog signals and op-amp biasing |
| OUT | Analog output | Common-collector sink output of both op-amps; drives optocoupler LED anode |
| VCC | Power supply | Positive supply rail; internally clamped at 28 V for overvoltage protection |
Key Features
| Feature | Design Value |
|---|---|
| Dual transconductance op-amps with ORed outputs | Enables fail-safe CV/CC priority logic: either loop violation pulls OUT low to throttle primary PWM |
| 0.5% precision internal voltage reference | Eliminates need for external reference IC or trimming, reducing BOM count and calibration cost |
| Full external compensation access | Both op-amp outputs and inverting inputs exposed - allows custom pole-zero placement for stability across topologies |
| 2 kV HBM ESD protection | Prevents latch-up or damage during PCB assembly and field service without added TVS diodes |
| Low-voltage start-up capability | Operates down to 4.5 V - supports auxiliary winding startup schemes in low-power adapters |
Applications
| USB-C PD Adapters | Lithium-Ion Battery Chargers |
|---|---|
Use Scenario: 20–60 W USB-C power adapters requiring programmable voltage and constant-current foldback during cable negotiation or fault conditions. IC Role / Device Role / Timing Role: Secondary-side CV/CC regulator providing feedback signal to primary-side PWM controller via optocoupler. Use Value: Enables single-chip dual-loop regulation with <±1% output tolerance across line/load/temperature, meeting USB-IF compliance requirements. | Use Scenario: Single-cell or multi-cell Li-ion battery charging circuits with CC/CV termination and thermal foldback. IC Role / Device Role / Timing Role: Precision current-sense and voltage-regulation controller interfacing with isolated DC-DC stage and battery protection IC. Use Value: Delivers 0.5% voltage reference accuracy and sub-mV offset to ensure tight charge voltage control, extending battery cycle life. |
| Medical Power Supplies | Industrial AC/DC Adapters |
Use Scenario: Class II medical-grade wall adapters (60601-1 compliant) requiring high reliability, low leakage, and redundant safety margins. IC Role / Device Role / Timing Role: Isolated secondary-side feedback controller managing output regulation and overcurrent shutdown signaling. Use Value: Internal Zener clamp (28 V) and 150 °C junction rating support safe operation under sustained overvoltage faults per IEC 60601-1 Annex D. | Use Scenario: DIN-rail or open-frame industrial adapters powering PLC I/O modules, sensors, or actuators with wide input range. IC Role / Device Role / Timing Role: Dual-loop regulation IC supporting universal input (90–264 VAC) flyback designs with adaptive load response. Use Value: 0–105 °C operating range and 175 °C/W thermal resistance enable convection-cooled designs without heatsinks in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CV/CC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431 + LM358 | Discrete solution requiring external reference and dual op-amps; no integrated OR logic or ESD protection | Higher BOM count and layout complexity; lacks built-in compensation nodes | Use only when legacy design reuse or extreme cost pressure outweighs integration benefits |
| TSM1011ID | Same architecture but 1% reference accuracy (2.519–2.570 V); otherwise identical pinout and specs | Suitable for non-critical adapters where ±1% output tolerance is acceptable | Select for cost-sensitive consumer adapters where tighter voltage regulation is not required |
Compared with TL431+LM358, TSM1011AID reduces component count by 5+ parts and eliminates manual compensation tuning; versus TSM1011ID, it delivers 2× tighter reference accuracy critical for USB-PD and medical-grade outputs.
Availability
TSM1011AID is available at Aetrix Electronics and suitable for USB-C PD adapters, lithium-ion battery chargers, and industrial AC/DC adapters requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TSM1011AID 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.
The TSM1011 series belongs to ST's dedicated power management analog portfolio, engineered specifically for secondary-side regulation in isolated SMPS topologies - emphasizing integration, precision, and robustness in cost-constrained adapter and charger applications.
FAQ
What is the function of the ORed output stage in TSM1011AID?
The ORed output stage combines the sinking outputs of both transconductance op-amps into a single OUT pin. This ensures that if either the voltage loop (CV) or current loop (CC) detects an over-condition, the output pulls low to activate the optocoupler - forcing the primary-side PWM to reduce duty cycle. No external logic is needed to prioritize CV vs. CC faults.
Can TSM1011AID operate without an external optocoupler?
No - TSM1011AID requires an optocoupler to close the feedback loop to the primary-side controller. Its OUT pin sinks current to drive the optocoupler LED; removing it breaks regulation. The device has no digital interface or primary-side communication capability, and is designed exclusively for isolated secondary-side feedback architectures.
How does the internal 28 V clamp protect the IC during transient overvoltage?
The internal Zener clamp activates when VCC exceeds 28 V, diverting excess current to GND. This protects internal circuitry during startup surges or transformer leakage spikes. External limiting resistor (Rlimit) must be sized using Equation 5 from the datasheet to ensure clamp power dissipation stays within safe limits - typically ≤100 mW.
Is TSM1011AID pin-compatible with TSM1011ID?
Yes - TSM1011AID and TSM1011ID share identical SO-8 pinout, electrical behavior, and functional block diagram. The only difference is reference accuracy: TSM1011AID guarantees 0.5% (2.532–2.557 V), while TSM1011ID specifies 1% (2.519–2.570 V). Layouts and schematics are fully interchangeable.
TSM1011AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.545V
- Voltage - Output (Max):
- -
- Current - Output:
- 1 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.5V ~ 28V
- Current - Supply:
- 50mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TSM1011AID FAQ
1.How can I place an order for TSM1011AID through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM1011AID 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 TSM1011AID reliable?
The price and inventory of TSM1011AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM1011AID is usually 5 days.
3.What payment methods are accepted for TSM1011AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM1011AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM1011AID?
TSM1011AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM1011AID 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 TSM1011AID?
For technical support, including TSM1011AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM1011AID requirements.
6.How does Aetrix verify that TSM1011AID is sourced from the original manufacturer or authorized distributors?
All TSM1011AID 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 TSM1011AID meets industry standards.
7.What is the process for return or replacement of TSM1011AID?
All TSM1011AID units undergo pre-shipment inspection (PSI). If there is an issue with TSM1011AID, 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 TSM1011AID part is unused and in its original packaging.
Return procedure for TSM1011AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSM1011AID Tags
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