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Diodes Incorporated AP4310EMTR-G1
- Part No.:
- AP4310EMTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP4310EMTR-G1.pdf
- Description:
- AMP
- Quantity:
- Payment:
- Shipping:
Inventory:3,447
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Product details
Overview
AP4310EMTR-G1 from Diodes Incorporated is a dual operational amplifier with integrated 2.5V precision shunt voltage reference, designed for CC/CV control in switching battery chargers and SMPS. It features ±0.4% reference tolerance, 0.5mV input offset voltage (typ), 1MHz unity-gain bandwidth, and operates from 3V to 36V supply. Used in AC-DC adapters and USB PD power stages.
For engineers reviewing the AP4310EMTR-G1 datasheet, AP4310EMTR-G1 pinout, AP4310EMTR-G1 application, or AP4310EMTR-G1 equivalent, this page delivers verified electrical specs, SO-8 terminal mapping, real-world charger topology integration, and validated alternative options for current/voltage loop design.
Technical Context
The AP4310EMTR-G1 integrates two functionally distinct op amps: Op Amp 1 has its non-inverting input internally tied to the 2.5V reference cathode (Pin 3/VKA), enabling direct voltage regulation feedback; Op Amp 2 provides fully uncommitted inputs for independent current-sense amplification. Both share a common 3–36V supply rail (Pin 8/VCC) and ground (Pin 4).
Its 2.5V shunt reference operates over 0.01–80mA sink current with 0.2Ω typical dynamic impedance and supports stable regulation across –40°C to +105°C ambient. The device uses monolithic bipolar process technology to achieve tight offset drift (7μV/°C) and high PSRR (90dB).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.50V ±0.4% - enables precise 4.2V Li-ion battery termination at 2× gain |
| Input Offset Voltage (Op Amp 1) | 0.5mV typ - reduces CV regulation error to <±1mV at 2× feedback gain |
| Unity-Gain Bandwidth | 1.0MHz - supports >10kHz loop bandwidth in digitally assisted analog control |
| Supply Voltage Range | 3V to 36V - accommodates wide-input offline SMPS without auxiliary LDO |
| Sink Current Capability (Ref) | 0.01–80mA - allows direct optocoupler LED drive or resistor-divider biasing |
| Output Voltage Swing | 0V to VCC–1.5V - ensures full-range output compliance into 10kΩ loads |
| Dynamic Impedance (Ref) | 0.2Ω typ - minimizes load-induced reference deviation during transient current steps |
Pinout & Package
AP4310EMTR-G1 is housed in a standard SO-8 surface-mount package (5.80 × 4.90 × 1.75 mm), RoHS-compliant and halogen-free per Diodes' Green definition.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTPUT 1) | Voltage regulation amplifier output | Drives optocoupler LED anode or error amplifier compensation network |
| 2 (INPUT 1–) | Inverting input of Op Amp 1 | Receives scaled output voltage feedback for closed-loop CV control |
| 3 (INPUT 1+/VKA) | Non-inverting input of Op Amp 1 / Reference cathode | Internally connected to 2.5V reference; serves as precision voltage node for feedback divider |
| 4 (GND) | Analog ground reference | Common return for both op amps and reference; requires low-impedance PCB plane |
| 5 (INPUT 2–) | Inverting input of Op Amp 2 | Accepts current-sense resistor voltage drop for CC loop control |
| 6 (INPUT 2+) | Non-inverting input of Op Amp 2 | Configurable reference or bias point; often tied to VKA or GND |
| 7 (OUTPUT 2) | Current regulation amplifier output | Drives primary-side PWM controller or secondary-side current DAC |
| 8 (VCC) | Positive supply rail | Powers both op amps and reference; decoupling capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual-op-amp + reference integration | Eliminates need for discrete TL431 + dual op amp, reducing BOM count by ≥3 components |
| 0.5mV input offset voltage (Op Amp 1) | Enables ≤±5mV total CV error in 5V–20V adapter designs without trimming |
| ±0.4% reference tolerance over temperature | Guarantees battery charge termination accuracy within ±0.5% of target voltage |
| 3–36V wide supply range | Supports direct connection to main SMPS rail, removing auxiliary bias supply |
| 0.2Ω reference dynamic impedance | Maintains <±1mV reference shift under 10mA step-load transients |
Applications
| Lithium-Ion Battery Charger | USB-C Power Delivery Adapter |
|---|---|
Use Scenario: Constant-current/constant-voltage charging of single-cell Li-ion batteries in portable medical devices. IC Role / Device Role / Timing Role: Dual-loop controller: Op Amp 1 regulates output voltage via feedback divider; Op Amp 2 compares current-sense voltage against 2.5V reference to enforce CC limit. Use Value: Enables ±0.5% voltage regulation and ±1% current regulation accuracy without calibration, meeting IEC 62368-1 safety margin requirements. | Use Scenario: Secondary-side voltage and current regulation in 45W USB-C PD adapters with isolated flyback topology. IC Role / Device Role / Timing Role: Precision shunt reference and error amplifiers provide feedback to optocoupler, closing both CV and CC loops across isolation barrier. Use Value: Reduces component count vs. discrete TL431 + LM358 solution while maintaining 10kHz loop stability margin per USB PD spec. |
| Industrial DC-DC Converter | Automotive Accessory Power Supply |
Use Scenario: Programmable bench power supply with adjustable 0–30V/0–5A output using front-panel potentiometers. IC Role / Device Role / Timing Role: Op Amp 2 configured as current-limit comparator; Op Amp 1 as voltage-set amplifier; shared 2.5V reference ensures tracking accuracy between loops. Use Value: Achieves <0.1% inter-loop tracking error over temperature, critical for lab-grade output stability. | Use Scenario: 12V-to-5V/3.3V buck converter powering infotainment USB ports in automotive cabins (–40°C to +105°C). IC Role / Device Role / Timing Role: Voltage reference and op amps implement secondary-side feedback for isolated DC-DC, replacing optocoupler-based solutions with tighter regulation. Use Value: Meets AEC-Q100 Grade 2 thermal range with no derating; 0.2Ω reference impedance prevents output droop during cold-crank transients. |
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 |
|---|---|---|---|
| TL431 + LM358 (dual) | Discrete implementation: separate 2.5V shunt reference and dual op amp; higher BOM count, larger footprint, no guaranteed offset matching | Requires external compensation and layout coordination; less consistent CV/CC tracking across temperature | Select when legacy design reuse or cost-sensitive low-volume production is prioritized over board space and performance consistency |
| AP4313EMTR-G1 | Same family; adds internal 1.24V reference and third op amp; higher quiescent current (0.35mA vs. 0.25mA) | Supports triple-loop control (e.g., V/I/temp); not drop-in compatible due to different pinout and reference voltage | Select when designing multi-output or thermally compensated supplies requiring additional control degrees of freedom |
Compared with TL431+LM358, AP4310EMTR-G1 reduces layout sensitivity and improves loop tracking; versus AP4313EMTR-G1, it offers lower cost and smaller footprint for dedicated dual-loop CC/CV applications without needing extra functionality.
Availability
AP4310EMTR-G1 is available at Aetrix Electronics and suitable for battery chargers, switching power supplies, and industrial DC-DC converters requiring stable component supply, extended temperature operation, and precision analog feedback.
Supply support for AP4310EMTR-G1 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions.
The AP4310E belongs to Diodes' precision analog control product line, engineered specifically for cost-sensitive, high-accuracy CC/CV regulation in isolated and non-isolated switching power converters.
FAQ
What is the maximum sink current the AP4310EMTR-G1 reference can handle?
The AP4310EMTR-G1 reference section supports 0.05mA to 80mA sink current, with guaranteed regulation down to 0.01mA minimum cathode current. At 80mA, the device maintains 2.5V ±0.4% output with ≤0.5Ω dynamic impedance, enabling direct optocoupler LED drive without external transistor buffering.
Can Op Amp 2 be used independently of the internal reference?
Yes - Op Amp 2 has fully uncommitted inputs (Pins 5 and 6) and does not rely on the internal 2.5V reference. Its non-inverting input may be biased externally (e.g., to GND or a resistor divider), allowing standalone current sensing, differential amplification, or comparator functions independent of the voltage regulation loop.
Is the AP4310EMTR-G1 qualified for automotive applications?
The AP4310EMTR-G1 is rated for –40°C to +105°C operation and meets JESD22-A113 moisture sensitivity Level 1, but it is not AEC-Q100 qualified. For automotive use, Diodes offers pin-compatible AEC-Q100 Grade 2 variants under different part numbers; consult local Diodes representatives for PPAP-capable versions.
How does the internal connection between Op Amp 1's non-inverting input and VKA affect circuit design?
This internal tie means Pin 3 (VKA) serves simultaneously as the 2.5V reference cathode and Op Amp 1's non-inverting input. Designers must route the feedback divider directly to Pin 3 - no external connection to that node is allowed. This eliminates external reference routing but requires careful PCB layout to avoid noise coupling into the high-impedance VKA node.
AP4310EMTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 200µA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AP4310EMTR-G1 FAQ
1.How can I place an order for AP4310EMTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP4310EMTR-G1 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 AP4310EMTR-G1 reliable?
The price and inventory of AP4310EMTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP4310EMTR-G1 is usually 5 days.
3.What payment methods are accepted for AP4310EMTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP4310EMTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP4310EMTR-G1?
AP4310EMTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP4310EMTR-G1 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 AP4310EMTR-G1?
For technical support, including AP4310EMTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP4310EMTR-G1 requirements.
6.How does Aetrix verify that AP4310EMTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP4310EMTR-G1 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 AP4310EMTR-G1 meets industry standards.
7.What is the process for return or replacement of AP4310EMTR-G1?
All AP4310EMTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP4310EMTR-G1, 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 AP4310EMTR-G1 part is unused and in its original packaging.
Return procedure for AP4310EMTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP4310EMTR-G1 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
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LM2902DR
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LM358P
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