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Analog Devices Inc. ADP3801AR-REEL
- Part No.:
- ADP3801AR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP3801AR-REEL.pdf
- Description:
- IC BATT CHG DUAL LI-ION
- Quantity:
- Payment:
- Shipping:
Inventory:1,288
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Product details
Overview
ADP3801AR-REEL from Analog Devices is a high-frequency switch-mode dual Li-ion battery charger IC with integrated 3.3 V LDO, ±0.75% final voltage accuracy (4.2/8.4/12.6 V), 200 kHz PWM oscillator, high-side current sensing, and A/B battery stack selection. It drives external PMOS transistors in buck-based CCCV charging for portable instrumentation and cellular phone chargers.
For engineers reviewing the ADP3801AR-REEL datasheet, ADP3801AR-REEL pinout, ADP3801AR-REEL application, or ADP3801AR-REEL equivalent, key selection criteria include end-of-charge (EOC) logic signaling, ±10% programmable battery voltage adjustment via ADJ pin, 16-pin SOIC package compatibility, and dual-battery multiplexing capability for universal charger designs.
Technical Context
The ADP3801AR-REEL implements a dual-loop control architecture: a high-side current sense amplifier (GM1) with 10× gain and 1 mV offset feeds into a programmable constant-current loop, while a precision voltage loop amplifier (GM3) compares divided battery voltage against an internal reference to regulate final charge voltage. Both loops share the COMP node for unified compensation.
Its A/B select MUX enables break-before-make switching between two independent battery stacks (BATA/BATB), each with dedicated voltage sense inputs and 265 kΩ input impedance. The PROG pin selects 4.2 V (1-cell), 8.4 V (2-cell), or 12.6 V (3-cell) final voltage using internal thin-film resistor dividers, and the ADJ pin provides linear ±10% fine-tuning of that setpoint via buffered reference scaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Final Battery Voltage Accuracy | ±0.75% over –10°C to +70°C ensures safe, specification-compliant Li-ion charging without external calibration. |
| PWM Oscillator Frequency | 200 kHz (ADP3801 variant) enables compact magnetics and EMI filtering for portable charger designs. |
| LDO Output | 3.3 V ±1.0% at 10 mA supports external microcontrollers or logic without secondary regulators. |
| Charge Current Programming | Voltage-controlled ISET input (0–1.65 V) sets charge current with ±1.0% accuracy at full scale. |
| End-of-Charge Detection | Active-low EOC output asserts when charge current drops ≤6% of full scale, gated by ≥95% battery voltage threshold. |
| Input Voltage Range (VCC) | 4.1 V to 20 V with UVLO at 3.9 V rising edge allows wide-input universal AC/DC adapter compatibility. |
| Battery Voltage Adjustment Range | ±10% via ADJ pin (0.6–2.3 V) enables chemistry-specific tuning (e.g., 4.1 V for conservative Li-ion cells). |
Pinout & Package
ADP3801AR-REEL is housed in a 16-lead SOIC (R-16A) package with exposed pad for thermal management. Pin functions are validated per Analog Devices' official pin configuration diagram (Rev. 0, p.4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRV (Pin 1) | External PMOS gate drive output | High-current push-pull driver with 35 ns rise time; clamped low-voltage output protects PMOS gate oxide. |
| RESET (Pin 2) | Power-on reset signal output | Active-low open-drain output asserting at VL = 2.7 V rising threshold; resets external MCU on power-up. |
| VCC (Pin 3) | Main supply input | Accepts 4.1–20 V; powers internal circuitry and LDO; triggers UVLO shutdown below 3.9 V. |
| VL (Pin 4) | LDO regulated output | 3.3 V ±1.0% source for external logic; remains active during SD/UVLO with 110 µA quiescent current. |
| SD (Pin 5) | Shutdown control input | Logic-high (>2.0 V) disables charging loops; LDO stays enabled for system biasing. |
| CS– / CS+ (Pins 6–7) | High-side current sense differential inputs | 0–(VCC–2 V) common-mode range enables current regulation even during short-circuit conditions. |
| ISET (Pin 8) | Charge current programming input | High-impedance voltage input (0–1.65 V) setting charge current via ICHARGE = VISET × 10 / RCS. |
| COMP (Pin 9) | Loop compensation node | Shared high-impedance node for both current and voltage loop compensation; 1.0–2.0 V range maps to 0–100% PWM duty cycle. |
| EOC (Pin 10) | End-of-charge status output | Active-low comparator output signaling full charge only after battery reaches ≥95% of final voltage. |
| ADJ (Pin 11) | Battery voltage fine-adjust input | Linear ±10% adjustment of final voltage setpoint; disabled above 2.5 V to prevent overvoltage. |
| PROG (Pin 12) | Final battery voltage selection input | Three-level analog input (0.0/1.1/2.2 V) selecting 4.2/8.4/12.6 V final voltage via internal resistor divider mux. |
| BATB (Pin 13) | Battery "B" voltage sense input | 265 kΩ input impedance; used with A/B select to monitor second battery stack independently. |
| BATA (Pin 14) | Battery "A" voltage sense input | 265 kΩ input impedance; primary battery sense path when A/B = logic low. |
| A/B (Pin 15) | Battery stack select input | Logic-low selects BATA; logic-high selects BATB; break-before-make switching prevents cross-conduction. |
| GND (Pin 16) | Analog/digital ground reference | Single-point Kelvin connection required at battery negative terminal to avoid voltage-sense errors. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent battery stack support | Break-before-make A/B MUX enables sequential charging of two chemically distinct Li-ion packs without hardware reconfiguration. |
| ±0.75% final voltage accuracy over temperature | Guaranteed across –10°C to +70°C eliminates need for external precision references or trimming resistors in production designs. |
| Integrated 3.3 V LDO with 10 mA drive | Reduces BOM count by powering external microcontrollers or level-shifters directly from VCC without discrete regulators. |
| Programmable ±10% battery voltage adjustment | Allows field tuning for battery manufacturer variations (e.g., 4.15 V vs. 4.20 V nominal) while retaining full accuracy spec. |
| Soft-start controlled via COMP node | Internal 100 µA COMP charge current limits slew rate to ~0.1 V/ms, preventing inrush stress on external MOSFET and filter components. |
| Intelligent EOC with voltage-gated enable | Prevents false triggering during soft-start or self-discharge by enabling EOC only after battery reaches ≥95% of final voltage. |
Applications
| Cellular Phone Fast Charger | Portable Instrumentation Power Management |
|---|---|
Use Scenario: Charging single- or dual-cell Li-ion batteries in compact handheld test equipment with limited PCB area and thermal budget. IC Role / Device Role / Timing Role: Dual-loop CCCV controller managing constant-current ramp and constant-voltage taper phases; LDO powers embedded ADC and display controller. Use Value: ±0.75% voltage accuracy ensures compliance with battery manufacturer specifications; 200 kHz switching enables small 68 µH inductor and low-profile ceramic output capacitors. |
Use Scenario: Universal benchtop charger supporting interchangeable battery modules (1S/2S/3S Li-ion) for field-serviceable instruments. IC Role / Device Role / Timing Role: Programmable final voltage selector (PROG/ADJ pins) and A/B MUX enable firmware-driven battery pack detection and charging profile adaptation. Use Value: Eliminates need for multiple charger variants; ±10% ADJ tuning accommodates aging or vendor-specific cell tolerances without hardware change. |
| Desktop Universal AC/DC Charger | Personal Digital Assistant (PDA) Docking Station |
Use Scenario: Multi-port desktop charger delivering up to 4 A total to diverse devices (smartphones, tablets, wearables) via shared AC adapter. IC Role / Device Role / Timing Role: High-side current sensing with 165 mV full-scale drop minimizes power loss in sense resistor; EOC signals host MCU to switch ports. Use Value: 1 mV current-sense offset enables accurate low-current termination (e.g., 100 mA cutoff); UVLO and SD inputs support adaptive power sharing across ports. |
Use Scenario: Docking cradle providing simultaneous charging and data sync for legacy PDAs with removable Li-ion packs. IC Role / Device Role / Timing Role: RESET output synchronizes PDA boot sequence with charger power-up; VL powers dock's USB interface logic. Use Value: Integrated 3.3 V LDO removes need for separate voltage rail; GND-referenced sense inputs simplify Kelvin routing on dense docking PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Li-ion battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP3802AR-REEL | 500 kHz oscillator (vs. 200 kHz); identical pinout, features, and package. | Enables smaller magnetics and faster transient response but increases EMI filtering complexity. | Select ADP3802AR-REEL when board space is constrained and higher-frequency operation is acceptable. |
| BQ24105RGTT | Single-cell only; integrated MOSFETs (no external PMOS required); 1.2 MHz switching. | Lacks dual-battery A/B MUX and programmable multi-cell voltage selection; not pin-compatible. | Choose BQ24105RGTT for cost-sensitive, single-cell applications where integration outweighs flexibility. |
Compared with ADP3802AR-REEL, ADP3801AR-REEL offers lower EMI and relaxed layout constraints due to its 200 kHz frequency, while BQ24105RGTT trades configurability for integration-making ADP3801AR-REEL optimal for multi-cell, multi-pack universal chargers requiring precision and extensibility.
Availability
ADP3801AR-REEL is available at Aetrix Electronics and suitable for fast chargers, universal AC/DC adapters, and portable instrumentation requiring stable component supply and long-term industrial lifecycle support.
Supply support for ADP3801AR-REEL 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 since 1965.
The ADP3801AR-REEL belongs to Analog Devices' battery management IC product line, designed specifically for high-accuracy, flexible Li-ion charging in space-constrained portable electronics with dual-battery and multi-chemistry support.
FAQ
What is the guaranteed final battery voltage accuracy of the ADP3801AR-REEL over temperature?
The ADP3801AR-REEL guarantees ±0.75% final battery voltage accuracy across the –10°C to +70°C operating temperature range for all three programmable settings (4.2 V, 8.4 V, and 12.6 V). This specification is ensured by on-chip precision thin-film resistors and a high-stability internal reference, eliminating the need for external calibration components in production designs.
How does the ADP3801AR-REEL support dual-battery charging?
The ADP3801AR-REEL supports dual-battery charging through its dedicated A/B select MUX (Pin 15) and separate BATA (Pin 14) and BATB (Pin 13) voltage sense inputs. When A/B = logic low, BATA is selected; when A/B = logic high, BATB is selected. The MUX operates break-before-make to prevent momentary shorting between battery stacks during switching.
Can the ADP3801AR-REEL be used to charge NiMH or NiCd batteries?
Yes-the ADP3801AR-REEL can charge NiMH and NiCd batteries when paired with an external microcontroller for charge termination. Its programmable constant-current loop and voltage-limited output allow µC-controlled delta-V or timer-based termination, though the built-in EOC comparator is optimized for Li-ion current-taper detection.
What is the function of the ADJ pin on the ADP3801AR-REEL?
The ADJ pin (Pin 11) on the ADP3801AR-REEL enables fine adjustment of the final battery voltage by ±10% around the PROG-selected setpoint (e.g., 4.2 V ±0.42 V). Applying 0.6–2.3 V to ADJ linearly scales the internal reference; voltages above 2.5 V disable adjustment. This allows chemistry-specific tuning without sacrificing accuracy.
Does the ADP3801AR-REEL integrate a voltage regulator, and what is its output capability?
Yes-the ADP3801AR-REEL integrates a 3.3 V low-dropout (LDO) regulator (Pin 4, VL) with ±1.0% accuracy over –10°C to +70°C and capable of delivering up to 10 mA. The LDO remains active during shutdown (SD) and UVLO events, supporting always-on system biasing for microcontrollers or monitoring circuitry.
ADP3801AR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADP3801
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1 ~ 3
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current, Voltage
- Fault Protection:
- Over Current, Over Temperature, Over Voltage
- Charge Current - Max:
- -
- Battery Pack Voltage:
- 4.2V, 8.4V, 12.6V
- Voltage - Supply (Max):
- 20V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADP3801AR-REEL FAQ
1.How can I place an order for ADP3801AR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3801AR-REEL 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 ADP3801AR-REEL reliable?
The price and inventory of ADP3801AR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3801AR-REEL is usually 5 days.
3.What payment methods are accepted for ADP3801AR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3801AR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3801AR-REEL?
ADP3801AR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3801AR-REEL 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 ADP3801AR-REEL?
For technical support, including ADP3801AR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3801AR-REEL requirements.
6.How does Aetrix verify that ADP3801AR-REEL is sourced from the original manufacturer or authorized distributors?
All ADP3801AR-REEL 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 ADP3801AR-REEL meets industry standards.
7.What is the process for return or replacement of ADP3801AR-REEL?
All ADP3801AR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADP3801AR-REEL, 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 ADP3801AR-REEL part is unused and in its original packaging.
Return procedure for ADP3801AR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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