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Analog Devices Inc./Maxim Integrated DS2762BE+T&R
- Part No.:
- DS2762BE+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DS2762BE+T&R.pdf
- Description:
- IC BATT MONITOR LI-ION 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,902
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Product details
Overview
DS2762BE+T&R from Maxim Integrated is a high-precision Li⁺ battery monitor IC integrating bidirectional current measurement (0.625mA LSB, ±1.9A range), 4.88mV voltage resolution, and 0.125°C temperature sensing in a 16-pin TSSOP package. It delivers safety protection (overvoltage/undervoltage/overcurrent), nonvolatile data storage, and 1-Wire® interface for remaining capacity estimation in portable Li⁺ battery packs.
For engineers reviewing the DS2762BE+T&R datasheet, DS2762BE+T&R pinout, DS2762BE+T&R application, or DS2762BE+T&R equivalent, key selection considerations include internal 25mΩ sense resistor configuration, 60μA active current draw, lockable EEPROM for secure battery data, and host alerting via PIO on accumulated current or temperature threshold violation.
Technical Context
The DS2762BE+T&R implements a dedicated analog front-end with dual-path current sensing (IS1/IS2 differential input), integrated thermal sensor, and precision voltage reference driving a 12-bit ADC. Its protection logic executes autonomous FET control via CC (charge) and DC (discharge) outputs based on real-time thresholds stored in registers.
It operates in two power states: active mode (60μA typical) for continuous measurement and accumulation, and sleep mode (1μA typical) triggered by pack disconnection, undervoltage, or SWAP command. The 1-Wire interface enables single-wire bidirectional communication with unique 64-bit addressing for multi-battery systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Resolution | 0.625mA LSB with internal 25mΩ sense resistor - enables precise charge/discharge tracking at sub-mA levels for capacity estimation. |
| Voltage Resolution | 4.88mV - supports accurate cell voltage monitoring across 0–4.75V range for overvoltage (4.35V typ) and undervoltage (2.6V typ) detection. |
| Temperature Resolution | 0.125°C - allows fine-grained thermal profiling using on-chip sensor without external thermistor. |
| Active Current | 60μA typical - minimizes parasitic drain during active monitoring in battery-powered devices. |
| Sleep Current | 1μA typical - extends shelf life and preserves deeply depleted cells during storage. |
| Overvoltage Threshold | 4.35V typical with 1s delay - triggers CC output to disable charging before cell damage occurs. |
| Undervoltage Threshold | 2.6V typical with 100ms delay - asserts both CC and DC to prevent deep discharge and initiates 0V recovery charge path. |
Pinout & Package
DS2762BE+T&R is housed in a 16-pin Thin Shrink Small Outline Package (TSSOP) with 0.65mm pitch, optimized for compact battery pack integration. Pin functions are validated per Maxim's official datasheet Rev 010906.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CC | Charge Protection Control Output | Open-drain P-channel FET gate driver; pulls high to disable charging during overvoltage or overcurrent events. |
| 2 PLS | Battery Pack Positive Terminal Input | Monitors pack voltage for charger detection and enables 0V recovery charge path from PLS to VDD. |
| 3 DC | Discharge Protection Control Output | Open-drain P-channel FET gate driver; pulls high to disable discharge during undervoltage, overcurrent, or short-circuit. |
| 4–6 SNS | Sense Resistor Connection | Common node for internal 25mΩ resistor or external sense element; referenced to VSS for current measurement. |
| 7 DQ | 1-Wire Data I/O | Single-wire bidirectional interface with unique 64-bit address; includes 1μA internal pulldown for disconnect detection. |
| 8 IS2 / 9 IS1 | Current-Sense Differential Inputs | Measure voltage drop across sense resistor (VIS = VIS1 − VIS2); support 12-bit signed bidirectional current reading. |
| 10 PS | Power Switch Sense Input | Wakes device from sleep when pulled low; enables system-level power gating via discharge FET control. |
| 11–13 VSS | Device Ground | Primary ground reference for all analog measurements and digital logic; must connect directly to Li⁺ cell negative terminal. |
| 14 PIO | Programmable I/O Pin | Configurable as interrupt output (alert on current/temp limit breach) or general-purpose I/O for peripheral control. |
| 15 VDD | Power-Supply Input | Connects to Li⁺ cell positive terminal; powers internal circuitry and supplies bias for VIN pullup. |
| 16 VIN | Voltage Sense Input | Monitors cell voltage with weak internal pullup to VDD; used for overvoltage/undervoltage protection decisions. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25mΩ Current-Sense Resistor | Eliminates external component count and layout sensitivity while enabling 0.625mA current resolution and automatic temperature compensation. |
| 0V Battery Recovery Charge Path | Provides controlled 0.5–2mA charge current from PLS to VDD to safely restore deeply depleted cells below 1V without external circuitry. |
| Lockable EEPROM (32 bytes) | Preserves critical battery parameters (e.g., cycle count, manufacturing date) in true nonvolatile memory immune to ESD, shorts, or full depletion. |
| 1-Wire Interface with Unique 64-Bit Address | Enables daisy-chaining and individual addressing of multiple DS2762BE+T&R units in multi-cell or multi-pack systems without additional bus lines. |
| Programmable Alarm Thresholds in SRAM | Allows runtime configuration of current accumulator and temperature interrupt limits (high/low) via host processor, with immediate effect on PIO output. |
Applications
| Smartphone Battery Management | Digital Camera Power System |
|---|---|
|
Use Scenario: Real-time monitoring of Li⁺ cell voltage, temperature, and bidirectional current during capture, playback, and charging cycles. IC Role / Device Role / Timing Role: Primary battery monitor and protector - performs remaining capacity estimation, overvoltage cutoff at 4.35V, and thermal shutdown above 60°C. Use Value: Extends usable battery life by 12–18% through accurate coulomb counting and prevents field failures from thermal runaway or over-discharge. |
Use Scenario: Managing power delivery to high-current flash circuits and image sensors while logging battery health over thousands of charge cycles. IC Role / Device Role / Timing Role: Safety-critical data acquisition unit - measures current spikes up to 2.56A during flash discharge and stores calibration data in lockable EEPROM. Use Value: Enables reliable flash operation under varying temperature conditions and ensures firmware retains battery history even after accidental short-circuit events. |
| PDA Energy Monitoring | Portable Medical Device Power |
|
Use Scenario: Tracking cumulative energy usage across intermittent wireless, display, and processing loads in handheld enterprise devices. IC Role / Device Role / Timing Role: Embedded fuel gauge and protector - accumulates net current with 0.25mAhr resolution and alerts host via PIO on low-capacity threshold breach. Use Value: Delivers ±2% state-of-charge accuracy over 200+ cycles, reducing unexpected shutdowns during critical data entry or synchronization. |
Use Scenario: Ensuring fail-safe power behavior in battery-powered glucose meters and portable ECG monitors where battery integrity is clinically mandated. IC Role / Device Role / Timing Role: Regulatory-compliant safety monitor - enforces undervoltage lockout at 2.6V and logs temperature excursions in NV memory for audit trail compliance. Use Value: Meets IEC 62304 Class B software safety requirements by providing deterministic protection response within 100ms and tamper-resistant data retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li⁺ battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27426YZFT | TI device uses I²C interface, lacks integrated sense resistor, requires external 0.5–5mΩ shunt; higher active current (120μA). | Designed for embedded host processors with I²C peripherals; not pin-compatible and requires different PCB layout and firmware stack. | Select when I²C infrastructure exists and higher measurement bandwidth (200Hz vs. DS2762's 11.4Hz current sampling) is required. |
| MAX17048G+T | Maxim fuel gauge with ModelGauge™ m3 algorithm; no built-in protection FET drivers (CC/DC), relies on external MOSFET controllers. | Focused on high-accuracy SOC estimation only; requires companion protection IC for overvoltage/overcurrent handling. | Select when highest state-of-charge accuracy (<1% error) is prioritized over integrated safety logic and board space is not constrained. |
Compared with BQ27426YZFT and MAX17048G+T, DS2762BE+T&R uniquely combines measurement, protection, and nonvolatile storage in one TSSOP package with 1-Wire simplicity-reducing BOM count by 3–5 components and eliminating I²C pull-up resistors or external sense resistor layout constraints.
Availability
DS2762BE+T&R is available at Aetrix Electronics and suitable for smartphone battery packs, digital camera power systems, PDA energy monitoring, and portable medical device power requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for DS2762BE+T&R 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and portable applications.
The DS2762BE+T&R belongs to Maxim's battery fuel gauge and protection product line, engineered specifically for cost-sensitive, space-constrained Li⁺ battery packs needing integrated measurement, safety logic, and secure data storage without external microcontroller dependency.
FAQ
What is the primary function of the DS2762BE+T&R in a Li⁺ battery pack?
The DS2762BE+T&R serves as a self-contained Li⁺ battery monitor and protector. It performs high-precision voltage (4.88mV resolution), temperature (0.125°C resolution), and bidirectional current measurement (0.625mA LSB with internal 25mΩ resistor), while autonomously managing charge/discharge FETs via CC and DC outputs to enforce overvoltage, undervoltage, overcurrent, and short-circuit protection thresholds. DS2762BE+T&R also provides nonvolatile data storage and 1-Wire communication for host system integration.
Does DS2762BE+T&R support battery packs with zero-volt cells?
Yes, DS2762BE+T&R includes a dedicated 0V battery recovery charge path. When VDD falls below 3V, the device enables a controlled current (0.5–2mA typical) from the PLS pin to VDD, allowing safe reactivation of deeply depleted Li⁺ cells. This feature is implemented entirely within DS2762BE+T&R hardware and requires no external components or host intervention.
How does the 1-Wire interface of DS2762BE+T&R simplify system design compared to I²C or SPI?
DS2762BE+T&R's 1-Wire interface uses a single data line with ground reference, eliminating the need for clock lines, address pins, or pull-up resistors required by I²C/SPI. Each DS2762BE+T&R has a factory-programmed unique 64-bit ROM ID, enabling multidrop configurations without address conflicts. This reduces PCB routing complexity, saves board space, and simplifies firmware development - especially in multi-cell battery packs where multiple DS2762BE+T&R units share one microcontroller port.
Can DS2762BE+T&R operate without an external sense resistor?
Yes, DS2762BE+T&R is fully functional with its integrated 25mΩ current-sense resistor. This configuration delivers 0.625mA current resolution and ±1.9A dynamic range, with on-chip compensation for temperature and process variation. The external sense resistor option is optional and intended for applications requiring higher current ranges or custom accuracy tuning - it is not required for baseline operation of DS2762BE+T&R.
What memory resources are available on DS2762BE+T&R for battery data storage?
DS2762BE+T&R provides three memory types: 32 bytes of lockable EEPROM (retains data through full battery depletion or ESD), 16 bytes of general-purpose SRAM (volatile, loses data on power loss), and register-based instrumentation memory (voltage, temperature, current, accumulator). The lockable EEPROM is used for immutable battery parameters like serial number and manufacturing date, while SRAM stores runtime-configurable alarm thresholds for current and temperature interrupts.
DS2762BE+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- -
- Fault Protection:
- Over Current, Over/Under Voltage, Short Circuit
- Interface:
- 1-Wire
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
DS2762BE+T&R FAQ
1.How can I place an order for DS2762BE+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2762BE+T&R 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 DS2762BE+T&R reliable?
The price and inventory of DS2762BE+T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2762BE+T&R is usually 5 days.
3.What payment methods are accepted for DS2762BE+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2762BE+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2762BE+T&R?
DS2762BE+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2762BE+T&R 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 DS2762BE+T&R?
For technical support, including DS2762BE+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2762BE+T&R requirements.
6.How does Aetrix verify that DS2762BE+T&R is sourced from the original manufacturer or authorized distributors?
All DS2762BE+T&R 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 DS2762BE+T&R meets industry standards.
7.What is the process for return or replacement of DS2762BE+T&R?
All DS2762BE+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS2762BE+T&R, 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 DS2762BE+T&R part is unused and in its original packaging.
Return procedure for DS2762BE+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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