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Texas Instruments TL103WBIDDFR
- Part No.:
- TL103WBIDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TL103WBIDDFR.pdf
- Description:
- DUAL, 36-V 1.2-MHZ LOW-OFFSET-VO
- Quantity:
- Payment:
- Shipping:
Inventory:4,886
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Product details
Overview
TL103WBIDDFR from Texas Instruments is a dual operational amplifier with integrated 2.5V shunt voltage reference in an 8-pin SOT-23 (DDF) package, designed for precision CC/CV feedback in isolated flyback power supplies. It delivers ±0.3mV typical input offset voltage, 1.2MHz gain bandwidth, 3V–36V supply range, and operates from –40°C to 125°C - enabling compact, high-accuracy battery charger control circuits.
For engineers reviewing the TL103WBIDDFR datasheet, TL103WBIDDFR pinout, TL103WBIDDFR application, or TL103WBIDDFR equivalent, this page provides verified specifications, functional pin mapping, real-world implementation context for SMPS feedback loops, and validated alternative options for cost-optimized, thermally robust power supply designs.
Technical Context
The TL103WBIDDFR integrates two independent high-voltage op amps and a precision 2.5V shunt reference on a single die. OP AMP1 has its noninverting input internally tied to the reference cathode (Pin 3), forming a fixed 2.5V reference node referenced to VCC–; OP AMP2 (Pins 5/6/7) remains fully uncommitted for general-purpose signal conditioning.
Its architecture supports simultaneous constant-current (via low-side current sense at OP AMP1) and constant-voltage (via resistive divider at OP AMP2) regulation in isolated flyback topologies. The internal reference sinks 0.2mA to 100mA while maintaining ±0.44% tolerance at 25°C and ±1.04% over full temperature - eliminating external reference ICs in space-constrained charger designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - enables direct operation from wide-input SMPS rails without LDO pre-regulation. |
| Input Offset Voltage (OP1 & OP2) | ±0.3mV typical (25°C), ±2.5mV max (–40°C to 125°C) - ensures <0.1% error in 2.5V reference-based current/voltage thresholds. |
| Gain Bandwidth Product | 1.2MHz - supports stable loop compensation up to ~100kHz switching frequencies in flyback controllers. |
| Reference Voltage Accuracy | 2.5V ±0.44% (25°C), ±1.04% (–40°C to 125°C) - eliminates need for external trimming in battery CV setpoints. |
| Total Supply Current | 550μA (typical, no load) - reduces standby power in always-on charger feedback paths. |
| EMI Rejection Ratio | 62–88dB across 400MHz–6GHz - suppresses RF interference from nearby wireless modules and digital noise. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive chargers and industrial power supplies. |
Pinout & Package
TL103WBIDDFR uses an 8-pin SOT-23-THN (DDF) package measuring 2.9mm × 2.8mm - optimized for high-density PCB layouts in compact AC/DC adapters and portable chargers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | OP AMP1 output | Drives opto-emulator LED anode in CC control path; rail-to-rail swing supports 0.2V–28.3V output at 36V supply. |
| 1IN– | OP AMP1 inverting input | Accepts current-sense voltage from low-side shunt resistor (e.g., R6); common-mode range extends to VCC–. |
| 1IN+ | OP AMP1 noninverting input / Reference cathode | Internally connected to 2.5V shunt reference; must be biased ≥2.5V above VCC– to regulate; sinks 0.2–100mA. |
| VCC– | Negative supply terminal | Reference anode and op amp negative rail; all voltages referenced to this node - critical for accurate 2.5V reference stability. |
| 2IN+ | OP AMP2 noninverting input | Accepts divided battery voltage for CV control; high CMRR (93–104dB) rejects supply ripple in feedback path. |
| 2IN– | OP AMP2 inverting input | Configured as summing node or comparator input; supports precision error amplification in isolated feedback loops. |
| 2OUT | OP AMP2 output | Drives second opto-emulator or logic interface; independent of OP AMP1 for dual-loop autonomy. |
| VCC+ | Positive supply terminal | Supplies both op amps and reference; absolute max rating of 40V allows transient margin in 36V systems. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5V shunt reference | Eliminates external reference IC and associated passives - reduces BOM count by ≥4 components in CC/CV chargers. |
| Pin-compatible upgrade to TL103W/TL103WA | Enables drop-in replacement in legacy designs with improved offset (±0.3mV vs ±1mV), bandwidth (+33%), and temp range (+20°C). |
| EMI-hardened input structure | Integrated RF filter raises immunity to cellular (900MHz/1.8GHz), Wi-Fi (2.4GHz/5GHz), and radar (3.6GHz) interference - prevents false triggering in noisy environments. |
| Wide cathode current range (0.2–100mA) | Supports direct drive of opto-emulator LEDs without external transistor - simplifies layout and improves thermal reliability. |
| Stable reference without output capacitor | Internally compensated shunt reference avoids instability risks from capacitive loading - removes need for stability analysis per Figure 5-22. |
Applications
| Battery Charger Feedback | Isolated Flyback SMPS |
|---|---|
Use Scenario: Precision constant-current/constant-voltage charging for Li-ion packs in portable power tools and e-bikes. IC Role / Device Role / Timing Role: TL103WBIDDFR serves as dual-loop error amplifier: OP AMP1 regulates current via low-side shunt sensing; OP AMP2 regulates voltage via resistive divider; integrated 2.5V reference sets both thresholds. Use Value: Achieves <±1% charge accuracy across –40°C to 125°C without calibration - reducing production test time and field failure rates. |
Use Scenario: Secondary-side feedback in 12–65W isolated AC/DC adapters for medical and industrial equipment. IC Role / Device Role / Timing Role: TL103WBIDDFR replaces discrete op amp + reference combo; OP AMP1 drives opto-emulator for CC loop; OP AMP2 drives separate opto for CV loop - enabling independent loop tuning. Use Value: Cuts secondary-side component count by 30% and PCB area by 45% versus discrete solutions - accelerating time-to-market for compact, certified power supplies. |
| Linear Voltage Regulation | Data-Acquisition Reference |
Use Scenario: Low-noise, high-PSRR linear regulator for analog sensor front-ends in automotive cabin controllers. IC Role / Device Role / Timing Role: TL103WBIDDFR's OP AMP2 configures as precision error amplifier; integrated 2.5V reference sets output voltage; OP AMP1 unused or disabled. Use Value: PSRR of 99–114dB suppresses switching noise from upstream DC/DC converters - improving ADC SNR by ≥8dB in 16-bit systems. |
Use Scenario: Stable reference source and signal conditioning for 12-bit SAR ADCs in industrial process monitors. IC Role / Device Role / Timing Role: TL103WBIDDFR's 2.5V reference feeds ADC reference input; OP AMP2 buffers and filters sensor signals before digitization. Use Value: Reference drift of ±26mV (–40°C to 125°C) limits total system error to <0.2% FS - meeting Class A instrumentation requirements without external calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-op-amp-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL103WIDDFR | Same DDF package but wider input offset (±1mV typ), narrower temp range (–40°C to 105°C), no EMI filtering. | Limited to consumer-grade chargers with relaxed accuracy and lower ambient temps. | Select when cost is primary constraint and 125°C operation or RF immunity is unnecessary. |
| TL103WAIDDFR | Same DDF package, ±0.5mV offset, ±0.44% reference tolerance, but only rated to 105°C and lacks EMI hardening. | Suitable for industrial chargers requiring tighter reference accuracy but not extreme temperature or EMI resilience. | Choose for mid-tier performance where TL103WBIDDFR's 125°C rating and EMI rejection are over-spec. |
Compared with TL103WIDDFR and TL103WAIDDFR, TL103WBIDDFR adds 20°C higher operating temperature, integrated EMI filtering, and tighter offset - making it the only option qualified for automotive under-hood battery management and high-density wireless-charging adapters.
Availability
TL103WBIDDFR is available at Aetrix Electronics and suitable for battery chargers, isolated flyback SMPS, and linear voltage regulation requiring stable component supply, extended temperature qualification, and EMI-resilient analog feedback.
Supply support for TL103WBIDDFR 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 and embedded processing technologies, with decades of expertise in precision op amps and power management ICs.
The TL103Wx family was developed specifically for cost-sensitive, space-constrained power supply feedback applications - integrating dual op amps and a shunt reference to replace discrete solutions in battery charging and isolated DC/DC converters.
FAQ
What is the function of Pin 3 (1IN+) on the TL103WBIDDFR?
Pin 3 serves a dual role: it is the noninverting input of OP AMP1 and the cathode terminal of the integrated 2.5V shunt reference. When supplied with ≥2.5V above VCC– and 0.2–100mA sink current, it establishes a precise 2.5V reference node. This eliminates external reference ICs and enables direct threshold setting for both constant-current and constant-voltage control loops in the TL103WBIDDFR.
Can TL103WBIDDFR operate from a single 5V supply?
Yes, TL103WBIDDFR supports single-supply operation from 3V to 36V. At 5V, its internal 2.5V reference provides an accurate mid-rail voltage for biasing sensors or driving analog circuitry. Both op amps maintain functionality: OP AMP1's reference remains active, and OP AMP2 operates with input common-mode range extending to VCC– and up to VCC+ – 1.5V - enabling rail-to-rail input capability in low-voltage systems.
How does the EMI rejection feature of TL103WBIDDFR improve system reliability?
The TL103WBIDDFR incorporates integrated RF and EMI filtering that achieves 62–88dB rejection across 400MHz–6GHz - covering GSM, Wi-Fi, Bluetooth, and radar bands. This prevents RF rectification at op amp inputs, which could cause output saturation or false triggering in sensitive feedback paths. In practice, this allows TL103WBIDDFR to maintain stable CC/CV regulation in densely packed PCBs with co-located wireless modules - reducing field failures in smart chargers and IoT power supplies.
What is the maximum cathode current the TL103WBIDDFR reference can sink?
The TL103WBIDDFR reference is rated to sink up to 100mA continuously, with a minimum of 0.2mA required for regulation. This wide range supports direct drive of opto-emulator LEDs (typically 5–20mA) without external transistors. At 100mA, the dynamic impedance remains ≤0.8Ω, ensuring <80mV deviation across load steps - critical for maintaining tight voltage setpoints in high-current battery chargers.
Is TL103WBIDDFR pin-compatible with older TL103W variants in the DDF package?
Yes, TL103WBIDDFR is fully pin-compatible with TL103WIDDFR and TL103WAIDDFR in the SOT-23-8 (DDF) package - sharing identical pinout, footprint, and solder profile. This enables drop-in replacement in existing designs to gain improved offset voltage (±0.3mV vs ±1mV), extended temperature range (–40°C to 125°C), and enhanced EMI immunity without PCB rework or layout changes.
TL103WBIDDFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 2
- Output Type:
- Single-Ended
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 275µA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
TL103WBIDDFR FAQ
1.How can I place an order for TL103WBIDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL103WBIDDFR 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 TL103WBIDDFR reliable?
The price and inventory of TL103WBIDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL103WBIDDFR is usually 5 days.
3.What payment methods are accepted for TL103WBIDDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL103WBIDDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL103WBIDDFR?
TL103WBIDDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL103WBIDDFR 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 TL103WBIDDFR?
For technical support, including TL103WBIDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL103WBIDDFR requirements.
6.How does Aetrix verify that TL103WBIDDFR is sourced from the original manufacturer or authorized distributors?
All TL103WBIDDFR 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 TL103WBIDDFR meets industry standards.
7.What is the process for return or replacement of TL103WBIDDFR?
All TL103WBIDDFR units undergo pre-shipment inspection (PSI). If there is an issue with TL103WBIDDFR, 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 TL103WBIDDFR part is unused and in its original packaging.
Return procedure for TL103WBIDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL103WBIDDFR Tags
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