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Analog Devices Inc. LTC1760IFW#PBF
- Part No.:
- LTC1760IFW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1760IFW#PBF.pdf
- Description:
- IC BATT CHG SMART 2CEL 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,892
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Product details
Overview
LTC1760IFW#PBF from Analog Devices (formerly Linear Technology) is a dual Smart Battery System Manager IC implementing SMBus Level 3 charger/selector functionality for portable systems with two smart batteries. It features ±0.2% charging voltage/current accuracy referenced to battery-reported values, <10 µs autonomous PowerPath™ switching between DCIN and either battery, and integrated synchronous buck charger with >95% efficiency. It serves as the central power arbitration and charging controller in dual-battery laptops and industrial backup systems.
For engineers reviewing the LTC1760IFW#PBF datasheet, LTC1760IFW#PBF pinout, LTC1760IFW#PBF application, or LTC1760IFW#PBF equivalent, key selection criteria include dual-battery SMBus v1.1 compliance, programmable charge limits (VLIMIT/ILIMIT), thermistor-based SafetySignal monitoring, and operation across –40°C to 125°C junction temperature.
Technical Context
The LTC1760IFW#PBF implements a proprietary PowerPath™ architecture using six P-channel MOSFET gate drivers (GDCO/GDCI, GB1O/GB1I, GB2O/GB2I) to enable simultaneous charging/discharging of two batteries while preventing power interruption during source transitions. Its three independent SMBus interfaces (SCL/SDA, SCL1/SDA1, SCL2/SDA2) allow host-level status monitoring and autonomous servoing to battery-measured voltage/current values.
It integrates a synchronous buck charger with TGATE/BGATE/BOOST/SW pins driving external FETs, plus CA1 current-sense amplifier (CSP/CSN), CL1 supply-current limiter (CLP/COMP1), and dual DACs (10-bit IDAC, 11-bit VDAC) for precise charge control. Thermistor inputs (TH1A/TH1B/TH2A/TH2B) feed SafetySignal logic for over/under-temperature and disconnection detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –40°C to 125°C junction temperature - supports extended industrial and automotive-grade thermal environments without derating. |
| Charging Voltage Accuracy | ±32 mV vs battery-reported Voltage() - enables tight regulation aligned with smart battery internal cell voltage sensing. |
| Charging Current Accuracy | ±2 mA to ±8 mA depending on RILIMIT setting - ensures precise current delivery matching battery-requested ChargingCurrent(). |
| PowerPath Switching Time | <10 µs - guarantees uninterrupted system power during AC adapter removal or battery swap events. |
| Buck Regulator Efficiency | >95% at full load - minimizes thermal stress and extends runtime in high-power portable applications. |
| SMBus Timing Compliance | tHIGH ≥4 µs, tLOW ≥4.7 µs, tTIMEOUT_SMB ≤35 ms - meets SMBus v1.1 timing requirements for reliable host/battery communication. |
| Thermistor Monitoring | Dual THxA/THxB + TH1B/TH2B inputs - supports cold/hot/ideal/under-range detection per battery for SafetySignal assertion. |
Pinout & Package
Package: 48-Lead Plastic TSSOP (FW package), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GDCO (6) | DCIN Output Switch Gate Drive | Drives gate of P-FET in DCIN path; enables/disables DCIN-to-system power flow. |
| GB1O (8), GB2O (10) | BAT1/BAT2 Output Switch Gate Drive | Control P-FETs connecting each battery to system rail; support simultaneous discharge into single load. |
| SCH1 (45), SCH2 (48) | Charger MUX Source Return | Return nodes for N-FET back-to-back switches routing charger output to BAT1 or BAT2. |
| VSET (13), ISET (15) | Charger Feedback & Filtering | VSET sets battery voltage reference via resistor divider; ISET filters delta-sigma IDAC output for stable current control. |
| TH1A/TH1B (21/22), TH2A/TH2B (24/25) | Thermistor Input Pairs | Measure battery thermistor resistance to detect temperature faults and disconnection for SafetySignal generation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual SMBus v1.1 Charger/Selector | Fully implements all SBS Manager v1.1 functions except composite battery reporting - eliminates need for external host arbitration logic. |
| Autonomous PowerPath™ Switching | Sub-10 µs transition between DCIN, BAT1, and BAT2 - prevents brownout during hot-swap or adapter loss without host intervention. |
| Programmable Charge Limits | VLIMIT and ILIMIT pins accept external resistors to set voltage range (8.4–32.8 V) and current range (0.98–4.43 A) - enhances safety and battery longevity. |
| SMBus Accelerator | Internal timing enhancement circuitry improves SCL/SDA rise/fall times and reduces bus timeouts - increases reliability in noisy or long-cable SMBus implementations. |
| Integrated SafetySignal Monitoring | Monitors thermistor pairs on both batteries and asserts SMBALERT on fault - provides hardware-level thermal and connection integrity assurance. |
Applications
| Portable Computers | Standalone Dual Battery Chargers |
|---|---|
Use Scenario: High-end laptop with dual hot-swappable Li-ion battery packs requiring seamless power continuity during AC adapter insertion/removal or battery replacement. IC Role / Device Role / Timing Role: Central SBS Manager performing real-time voltage/current servoing, SMBus arbitration, and sub-10 µs PowerPath switching between sources. Use Value: Extends runtime up to 10% and reduces charge time up to 50% versus sequential charging, while maintaining ±0.2% accuracy per battery's internal measurements. | Use Scenario: Bench-top dual-battery charger for field service or lab use, supporting multiple chemistries (Li-ion, NiMH) and configurable charge profiles. IC Role / Device Role / Timing Role: Standalone charger controller executing autonomous wake-up charging, thermistor-based safety checks, and SMBus-accelerated communication with smart batteries. Use Value: Eliminates need for host microcontroller; enables plug-and-play operation with full SBS v1.1 compliance and programmable V/I limits via external resistors. |
| Battery Backup Systems | Industrial Portable Instruments |
Use Scenario: Critical infrastructure UPS or medical device with redundant battery banks requiring fail-safe switchover and precise state-of-charge tracking. IC Role / Device Role / Timing Role: Dual-battery arbiter managing priority-based sourcing, simultaneous discharge, and SafetySignal-driven alarm reporting via SMBALERT. Use Value: Guarantees uninterrupted operation during source failure; provides accurate battery health data via SMBus queries without host software overhead. | Use Scenario: Rugged handheld test equipment operating in wide ambient temperatures (-40°C to 85°C) with dual battery support for extended deployment. IC Role / Device Role / Timing Role: Temperature-hardened SBS Manager enabling reliable dual-battery management under thermal stress, with LOPWR/DCDIV comparator inputs for AC present detection. Use Value: Full specification compliance over –40°C to 125°C junction range ensures consistent performance in harsh environments without firmware adaptation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual smart battery management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24725ARHRT | Single-battery focus; lacks dual-SMBus arbitration and simultaneous dual-battery discharge capability; uses different PowerPath topology. | Designed for single-battery notebooks; cannot replace LTC1760IFW#PBF in dual-battery architectures without redesign. | Select only if system uses one smart battery and requires TI ecosystem integration. |
| ISL9238HRZ-T | Supports dual batteries but implements SMBus v2.0; includes integrated ADC for direct thermistor reading; no SafetySignal pin or dedicated SMBALERT output. | Targets newer platforms requiring higher-speed SMBus and embedded telemetry; lacks native SafetySignal alarm signaling per battery. | Choose when upgrading from SMBus v1.1 to v2.0 and accepting trade-off in discrete alarm signaling. |
Compared with BQ24725ARHRT and ISL9238HRZ-T, the LTC1760IFW#PBF uniquely delivers true dual-SMBus v1.1 compliance with autonomous SafetySignal generation, sub-10 µs PowerPath switching, and simultaneous dual-battery discharge-making it irreplaceable in legacy or cost-optimized dual-battery systems requiring guaranteed timing and alarm behavior.
Availability
LTC1760IFW#PBF is available at Aetrix Electronics and suitable for portable computers, standalone dual smart battery chargers, and battery backup systems requiring stable component supply across extended temperature ranges.
Supply support for LTC1760IFW#PBF 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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, formed through the acquisition of Linear Technology in 2017.
The LTC1760IFW#PBF belongs to ADI's Smart Battery System Manager product line, designed specifically for robust, autonomous dual-battery power management in portable computing and mission-critical backup applications where reliability and SMBus compliance are mandatory.
FAQ
What is the operating temperature range of the LTC1760IFW#PBF?
The LTC1760IFW#PBF is rated for a junction temperature range of –40°C to 125°C, making it suitable for industrial and extended-temperature applications. This I-grade specification is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics notes, with guaranteed performance across the full range under pulsed-load testing conditions.
How does the LTC1760IFW#PBF achieve ±0.2% charging accuracy?
The LTC1760IFW#PBF achieves ±0.2% charging voltage and current accuracy by servoing directly to the Voltage() and ChargingCurrent() values reported by the smart batteries over SMBus-not to externally measured terminal voltages or currents. This closed-loop method leverages the battery's own internal sense circuitry, as explicitly stated in the FEATURES and DESCRIPTION sections of the datasheet.
Does the LTC1760IFW#PBF support simultaneous charging of both batteries?
Yes, the LTC1760IFW#PBF supports simultaneous charging of both batteries using its proprietary PowerPath™ architecture and dual charger MUX switches (GCH1/GCH2, SCH1/SCH2). The Typical Application diagram and "Dual vs Sequential Charging" section confirm up to 50% faster total charge time versus sequential methods, enabled by independent current control per battery path.
What is the function of the SafetySignal pins on the LTC1760IFW#PBF?
The SafetySignal functionality on the LTC1760IFW#PBF is implemented via TH1A/TH1B and TH2A/TH2B thermistor inputs, which monitor battery temperature and disconnection status. When a fault is detected (e.g., out-of-range thermistor resistance), the device asserts the SMBALERT pin to signal the host-providing hardware-level safety assurance without host polling.
Can the LTC1760IFW#PBF operate without an SMBus host controller?
Yes, the LTC1760IFW#PBF supports fully autonomous operation without an SMBus host, as highlighted in the FEATURES list ("Supports Autonomous Operation without a Host"). It performs self-contained battery selection, charging, PowerPath switching, and SafetySignal monitoring using its internal logic and SMBus accelerators-even when SCL/SDA lines are unconnected.
LTC1760IFW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Battery Chemistry:
- Smart Batteries
- Number of Cells:
- 2
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- -
- Charge Current - Max:
- 4.43A
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 28V
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
LTC1760IFW#PBF FAQ
1.How can I place an order for LTC1760IFW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1760IFW#PBF 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 LTC1760IFW#PBF reliable?
The price and inventory of LTC1760IFW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1760IFW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1760IFW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1760IFW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1760IFW#PBF?
LTC1760IFW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1760IFW#PBF 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 LTC1760IFW#PBF?
For technical support, including LTC1760IFW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1760IFW#PBF requirements.
6.How does Aetrix verify that LTC1760IFW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1760IFW#PBF 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 LTC1760IFW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1760IFW#PBF?
All LTC1760IFW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1760IFW#PBF, 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 LTC1760IFW#PBF part is unused and in its original packaging.
Return procedure for LTC1760IFW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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