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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Battery Chargers

Analog Devices Inc. ADP3810AR-8.4

Name: ADP3810AR-8.4
Brand: Analog Devices Inc.
SKU: ADP3810AR-8.4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADP3810AR-8.4

Manufacturer:: Analog Devices Inc.

Category:: Battery Chargers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: ADP3810AR-8.4.pdf

Description:: IC BATT CHG CONTROLLER

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ADP3810AR-8.4 from Analog Devices is a precision Li-ion battery charger controller IC designed for secondary-side, isolated off-line charging systems. It provides constant-current/constant-voltage regulation with programmable charge current (100 mA to 1.2 A), ±1.0% final battery voltage accuracy at 8.4 V, and low 300 mV full-scale current sense voltage for high-efficiency sensing across a 0.25 Ω sense resistor. It drives the diode side of an optocoupler directly for isolated feedback control in flyback or buck converters.

For engineers reviewing the ADP3810AR-8.4 datasheet, ADP3810AR-8.4 pinout, ADP3810AR-8.4 application, or ADP3810AR-8.4 equivalent, key selection considerations include its fixed 8.4 V final battery voltage (for 2-cell Li-ion), SO-8 package compatibility, UVLO threshold (2.7 V turn-on), 2.7 V to 16 V supply range, and integrated 2.000 V reference with ±1.0% accuracy - all critical for reliable, safety-compliant battery management in consumer and industrial chargers.

Technical Context

The ADP3810AR-8.4 integrates two high-gain GM-type error amplifiers (GMI for current loop, GM2 for voltage loop) sharing a common COMP node for coordinated dual-loop control. Its internal precision thin-film voltage divider sets the 8.4 V final battery voltage, eliminating external resistors and ensuring ±1.0% total voltage loop accuracy over −40°C to +85°C.

It features a buffered, high-impedance VCTRL input (0–1.2 V) that programs charge current via external sense resistor and gain network, and an output stage delivering up to 6 mA sink/source current directly to optocoupler LEDs. The 2.000 V reference (±1.0% accuracy, 35 µV_P-P noise, 0.1 µF required bypass) supports both internal regulation and external circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Final Battery Voltage	8.4 V - factory-trimmed for 2-cell Li-ion stacks; no external resistors needed.
Current Sense Full-Scale	−300 mV - enables accurate current limiting with minimal power loss across sense resistor.
Voltage Accuracy	±1.0% - includes offset, bias current, divider, and reference errors; guarantees safe Li-ion charging.
Supply Range	2.7 V to 16 V - supports wide-input offline supplies while controlling up to 16.8 V battery stacks.
Reference Output	2.000 V ±1.0% - stable, low-noise reference usable externally; requires 0.1 µF ceramic capacitor.
UVLO Threshold	2.7 V (turn-on), 2.6 V (turn-off) - prevents erratic operation during brownout or startup.
Output Current Drive	4–6 mA - sufficient to directly drive MOC8103 or similar optocouplers without buffer stages.

Pinout & Package

ADP3810AR-8.4 is housed in an SO-8 surface-mount package with standard 1.27 mm pitch and exposed pad thermal design. Pin functions are validated per Analog Devices ADP3810/ADP3811 Rev. 0 datasheet.

Pin/Terminal	Circuit Role	Design Meaning
OUT	Optocoupler drive output	Current-source output (4–6 mA) directly interfaces with LED anode of isolation optocoupler.
VSENSE	Battery voltage sense input	High-impedance input referenced to internal 2.000 V reference; accepts up to 20 V for 8.4 V option.
VCS	Current sense input	Virtual ground node for external sense resistor; regulates VRCS to −300 mV full scale.
VREF	Precision reference output	2.000 V ±1.0% output; must be bypassed with 0.1 µF capacitor for stability and noise performance.
COMP	Compensation node	Shared node for GMI and GM2 loops; RC network here stabilizes both current and voltage control loops.
VCTRL	Charge current programming input	0–1.2 V high-Z input; sets charge current via internal 80 kΩ resistor and external R3 network.
VCC	Positive supply	2.7–16 V input; powers internal amplifiers, reference, and output stage.
GND	Ground reference	Analog and power ground; return path for VCS, VSENSE, and internal bias currents.

Key Features

Feature	Design Value
Fixed 8.4 V final battery voltage	Laser-trimmed internal thin-film resistors eliminate external components and ensure ±1.0% accuracy for 2-cell Li-ion.
Low 300 mV current sense threshold	Minimizes I²R losses in sense resistor; supports efficient 100 mA–1.2 A charging with 0.25 Ω resistor.
Direct optocoupler drive	Integrated 6 mA output stage eliminates external transistor buffers, reducing BOM and layout complexity in isolated designs.
Undervoltage lockout (UVLO)	2.7 V turn-on / 2.6 V turn-off ensures clean startup and shutdown, preventing undefined behavior during supply transients.
2.000 V precision reference	±1.0% initial accuracy, 35 µV_P-P low-frequency noise, and 0.1 µF bypass requirement enable stable multi-loop regulation.

Applications

2-Cell Li-ion Fast Charger	Isolated Flyback Battery Charger
Use Scenario: Charging portable medical devices or power tools with dual-series Li-ion cells requiring precise 8.4 V termination and high-current CC/CV profiles. IC Role / Device Role / Timing Role: Primary battery voltage and current regulator on secondary side; provides isolated feedback via optocoupler to primary PWM controller. Use Value: Guarantees ±1.0% 8.4 V cutoff prevents overcharge-induced thermal runaway while enabling full capacity utilization (≥99% of rated mAh).	Use Scenario: Wall-adapted offline charger for cordless vacuum cleaners or e-bikes using transformer-isolated flyback topology. IC Role / Device Role / Timing Role: Secondary-side controller that senses battery voltage/current and drives optocoupler LED to modulate primary-side duty cycle. Use Value: Eliminates need for separate voltage/current ADCs and microcontroller; reduces system cost and improves reliability through analog "OR" loop arbitration.
Industrial Portable Equipment Charger	Medical Device Battery Management
Use Scenario: Charging ruggedized handheld test equipment with sealed 2-cell Li-ion packs operating across −20°C to +60°C ambient. IC Role / Device Role / Timing Role: Precision analog charger controller maintaining CC/CV regulation despite wide supply (2.7–16 V) and temperature variation. Use Value: Maintains ±1.0% voltage accuracy over full −40°C to +85°C range, ensuring compliance with IEC 62133 safety requirements.	Use Scenario: Rechargeable battery pack in Class II medical instruments where failure modes must be strictly controlled. IC Role / Device Role / Timing Role: Safety-critical battery voltage supervisor and current limiter; integrates UVLO and overvoltage comparator for fault containment. Use Value: Built-in 6% overvoltage clamp (relative to 8.4 V) triggers fast output response (<8 µs) to suppress transient overvoltage before cell damage occurs.

2-Cell Li-ion Fast Charger

Isolated Flyback Battery Charger

Use Scenario: Charging portable medical devices or power tools with dual-series Li-ion cells requiring precise 8.4 V termination and high-current CC/CV profiles.

IC Role / Device Role / Timing Role: Primary battery voltage and current regulator on secondary side; provides isolated feedback via optocoupler to primary PWM controller.

Use Value: Guarantees ±1.0% 8.4 V cutoff prevents overcharge-induced thermal runaway while enabling full capacity utilization (≥99% of rated mAh).

Use Scenario: Wall-adapted offline charger for cordless vacuum cleaners or e-bikes using transformer-isolated flyback topology.

IC Role / Device Role / Timing Role: Secondary-side controller that senses battery voltage/current and drives optocoupler LED to modulate primary-side duty cycle.

Use Value: Eliminates need for separate voltage/current ADCs and microcontroller; reduces system cost and improves reliability through analog "OR" loop arbitration.

Industrial Portable Equipment Charger

Medical Device Battery Management

Use Scenario: Charging ruggedized handheld test equipment with sealed 2-cell Li-ion packs operating across −20°C to +60°C ambient.

IC Role / Device Role / Timing Role: Precision analog charger controller maintaining CC/CV regulation despite wide supply (2.7–16 V) and temperature variation.

Use Value: Maintains ±1.0% voltage accuracy over full −40°C to +85°C range, ensuring compliance with IEC 62133 safety requirements.

Use Scenario: Rechargeable battery pack in Class II medical instruments where failure modes must be strictly controlled.

IC Role / Device Role / Timing Role: Safety-critical battery voltage supervisor and current limiter; integrates UVLO and overvoltage comparator for fault containment.

Use Value: Built-in 6% overvoltage clamp (relative to 8.4 V) triggers fast output response (<8 µs) to suppress transient overvoltage before cell damage occurs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery charger controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADP3810AR-4.2	Same SO-8 package and architecture but factory-trimmed for 4.2 V (1-cell Li-ion); identical UVLO, reference, and current-sense specs.	Designed for single-cell Li-ion systems; not suitable for 2-cell stacks due to hard-coded voltage limit.	Select only if target battery is 1-cell; ADP3810AR-8.4 is mandatory for 2-cell configurations.
ADP3811AR	Adjustable final voltage via external resistors; ±1.8% reference accuracy; lacks internal thin-film dividers.	Supports NiCd/NiMH and custom Li-ion chemistries; requires external R1/R2 network and additional design validation.	Choose when flexibility across multiple battery types or non-standard voltages (e.g., 7.8 V, 10.2 V) is required; ADP3810AR-8.4 offers lower risk and faster time-to-market for fixed 8.4 V.

Compared with ADP3810AR-4.2 and ADP3811AR, the ADP3810AR-8.4 delivers optimal trade-offs for 2-cell Li-ion: guaranteed ±1.0% voltage accuracy without external components, reduced BOM count, and simplified layout-while retaining full compatibility with isolated flyback and buck topologies used in certified medical and industrial chargers.

Availability

ADP3810AR-8.4 is available at Aetrix Electronics and suitable for 2-cell Li-ion fast chargers, isolated flyback battery management systems, and medical-grade portable equipment requiring stable component supply and long-term lifecycle support.

Supply support for ADP3810AR-8.4 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADP3810 product line delivers precision, isolated battery charger controllers optimized for secondary-side implementation in off-line AC/DC adapters and industrial power supplies targeting Li-ion, NiCd, and NiMH chemistries.

FAQ

What is the final battery voltage setting for ADP3810AR-8.4?

The ADP3810AR-8.4 is factory-trimmed to a precise 8.4 V final battery voltage, corresponding to two series-connected Li-ion cells (4.2 V per cell). This value is set by internal laser-trimmed thin-film resistors and cannot be adjusted externally. The ±1.0% accuracy specification covers all sources of error-including reference, amplifier offset, and resistor divider-over the full −40°C to +85°C operating range. This ensures safe, compliant charging without risk of overvoltage stress on the battery stack.

Can ADP3810AR-8.4 be used with batteries other than Li-ion?

The ADP3810AR-8.4 is specifically optimized for Li-ion chemistry due to its fixed 8.4 V termination voltage and tight ±1.0% accuracy-critical for preventing thermal runaway. It is not recommended for NiCd or NiMH batteries, which require different termination methods (e.g., −ΔV detection) and typically lower per-cell voltages. For those chemistries, Analog Devices specifies the adjustable ADP3811AR instead. Using ADP3810AR-8.4 with non-Li-ion batteries may result in undercharging, overcharging, or failure to terminate correctly.

What is the minimum external sense resistor value supported by ADP3810AR-8.4?

The ADP3810AR-8.4 supports external sense resistors down to 0.1 Ω, enabling charge currents up to 3 A when paired with appropriate R3 and VCTRL settings. However, the datasheet specifies full-scale current sense voltage (−300 mV) accuracy assuming a 0.25 Ω resistor; using lower values increases absolute current error proportionally-even though percentage error remains unchanged. For production designs targeting ≤1.2 A, Analog Devices recommends 0.25 Ω ±1% metal film resistors to maintain specified accuracy and thermal stability.

Does ADP3810AR-8.4 require an external compensation network?

Yes, ADP3810AR-8.4 requires an external RC network connected between the COMP pin and GND for loop stability. This network primarily compensates the voltage control loop (GM2) at low frequencies (<100 Hz), but also affects the current loop (GMI) since both share the COMP node. A second higher-frequency RC network (e.g., ~1–10 kHz) may be added in series for improved transient response. The exact values depend on the dc-dc converter topology and component selection; Analog Devices provides detailed compensation calculations in the ADP3810/ADP3811 datasheet Figures 23–24 and associated text.

How does the overvoltage protection feature work in ADP3810AR-8.4?

The ADP3810AR-8.4 includes a dedicated overvoltage comparator that triggers when the sensed battery voltage exceeds 6% above the full-scale value-in this case, 8.4 V × 1.06 = 8.904 V. Upon detection, the output stage rapidly increases OUT current (response time <8 µs) to force immediate reduction of the dc-dc converter's duty cycle, suppressing transient overvoltage before cell damage occurs. This function operates independently of the main GM2 voltage loop and is intended for fault containment-not steady-state regulation-making it essential for robust safety-critical battery systems.

ADP3810AR-8.4 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Battery Chemistry:: Lithium Ion/Polymer

Number of Cells:: 1 ~ 4

Current - Charging:: Constant - Programmable

Programmable Features:: Current

Fault Protection:: Over Current, Over Voltage

Charge Current - Max:: -

Battery Pack Voltage:: 8.4V

Voltage - Supply (Max):: 16V

Interface:: -

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

ADP3810AR-8.4 FAQ

1.How can I place an order for ADP3810AR-8.4 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADP3810AR-8.4 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 ADP3810AR-8.4 reliable?

The price and inventory of ADP3810AR-8.4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3810AR-8.4 is usually 5 days.

3.What payment methods are accepted for ADP3810AR-8.4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3810AR-8.4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADP3810AR-8.4?

ADP3810AR-8.4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADP3810AR-8.4 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 ADP3810AR-8.4?

For technical support, including ADP3810AR-8.4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3810AR-8.4 requirements.

6.How does Aetrix verify that ADP3810AR-8.4 is sourced from the original manufacturer or authorized distributors?

All ADP3810AR-8.4 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 ADP3810AR-8.4 meets industry standards.

7.What is the process for return or replacement of ADP3810AR-8.4?

All ADP3810AR-8.4 units undergo pre-shipment inspection (PSI). If there is an issue with ADP3810AR-8.4, 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 ADP3810AR-8.4 part is unused and in its original packaging.

Return procedure for ADP3810AR-8.4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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