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Analog Devices Inc. LTC1960CG#TRPBF
- Part No.:
- LTC1960CG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 36-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1960CG#TRPBF.pdf
- Description:
- IC BATT CHG SMART 2CEL 36SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,057
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Product details
Overview
LTC1960CG#TRPBF from Analog Devices is a dual-battery charger and PowerPath selector IC for portable systems with two smart batteries. It integrates SPI-controlled charging, autonomous <10µs power-source switching, 95% efficient synchronous buck regulation, 11-bit VDAC (0.8% voltage accuracy), and 10-bit IDAC (5% current accuracy). It enables simultaneous dual-battery discharge (extending runtime by ~10%) and dual charging (reducing charge time up to 50%) in SBS-compliant laptops and portable instruments.
For engineers reviewing the LTC1960CG#TRPBF datasheet, LTC1960CG#TRPBF pinout, LTC1960CG#TRPBF application, or LTC1960CG#TRPBF equivalent, key selection criteria include its 38-pin QFN/36-pin SSOP packaging, 0°C to 70°C operating range, dual-battery SPI control architecture, PowerPath™ autonomous switching behavior, and compatibility with Li-ion/NiMH battery chemistries up to 28V.
Technical Context
The LTC1960CG#TRPBF implements a proprietary PowerPath architecture using P-channel FET gate drivers (GB1O/GB1I/GB2O/GB2I/GDCO/GDCI) to enable seamless, sub-10µs source arbitration between DCIN, BAT1, and BAT2 - without microcontroller intervention during LOPWR or DCDIV threshold events. Its dual-battery charging relies on back-to-back N-channel MUX switches (GCH1/SCH1, GCH2/SCH2) controlled via SPI, supporting simultaneous current sharing based on battery voltage and state-of-charge.
Charging is managed by a current-mode synchronous buck controller (TGATE/BGATE/SW/BOOST) with programmable voltage (via 11-bit VDAC at VSET) and current (via 10-bit IDAC at ITH), achieving 0.5V dropout and 95% efficiency. Input current limiting (5% accuracy at CLP/COMP1) and short-circuit protection (SCP/SCN) are hardware-asserted, while all status, configuration, and fault reporting occur over a 4-wire SPI interface (SSB/SCK/MOSI/MISO) with watchdog timer (1.2–4.5s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 6V to 28V DCIN; supports wall adapters up to 32V absolute max - enables universal AC/DC input compatibility. |
| Battery Voltage Range | 6V to 28V per battery - compatible with 2–7-cell Li-ion (8.4V–29.4V nominal) and multi-cell NiMH packs. |
| Charger Efficiency | 95% typical - minimizes thermal load and extends portable system runtime under charge. |
| VDAC Accuracy | 0.8% voltage accuracy (11-bit resolution) - ensures precise battery termination voltage setting (e.g., ±100mV at 12.6V). |
| IDAC Accuracy | 5% current accuracy (10-bit resolution) - delivers repeatable charge current programming (e.g., ±150mA at 3A). |
| PowerPath Switching | <10µs autonomous switchover - prevents system brownout during hot-swap of batteries or adapter removal. |
| SPI Interface | 4-wire, 2.5µs minimum SCK period - enables real-time monitoring and reconfiguration by low-end MCUs without DMA. |
Pinout & Package
Package: 38-pin (5mm × 7mm) plastic QFN with exposed thermal pad (Pin 39 = GND). Pin count and layout match LTC1960CUHF#TRPBF variant; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VPLUS (Pin 27) | Internal supply rail | Powered via internal diodes from DCIN/BAT1/BAT2/SCN - provides bias for analog blocks when no primary source is active. |
| DCIN (Pin 18) | Main DC input | Direct connection to wall adapter; also serves as input to adapter current limit comparator (CL1) - no series resistance allowed. |
| BAT1 / BAT2 (Pins 29 / 28) | Battery inputs | Provide power and voltage feedback to charger; support autonomous PowerPath selection and dual-battery discharge paths. |
| TGATE / BGATE (Pins 21 / 16) | Buck converter gate drives | Drive external N-channel MOSFETs in synchronous buck topology - enables high-efficiency battery charging up to 4.1A. |
| GCH1 / SCH1 / GCH2 / SCH2 (Pins 23/22/24/25) | Charge MUX switch controls | Enable bidirectional, reverse-current-protected charging of BAT1 and/or BAT2 - critical for simultaneous dual-battery operation. |
| GB1O / GB1I / GB2O / GB2I / GDCO / GDCI (Pins 34/35/36/37/32/33) | PowerPath P-FET gate drivers | Control six external P-channel FETs to implement diode-or functionality with <10µs switchover and minimal conduction loss. |
| SSB / SCK / MOSI / MISO (Pins 6/7/9/8) | SPI interface | Full-duplex serial control and status readback - supports register writes, DAC loading, and real-time fault polling without CPU overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary PowerPath™ architecture | Autonomous, hardware-based source selection eliminates MCU dependency during power faults - ensures uninterrupted system operation. |
| Simultaneous dual-battery charging | Reduces total charge time up to 50% for mismatched Li-ion cells by dynamically allocating current based on voltage and SOC. |
| Simultaneous dual-battery discharge | Extends system runtime ~10% by lowering per-battery discharge rate and reducing conduction losses across PowerPath FETs. |
| 5% accurate input current limiting | Prevents wall adapter overload without external sensing circuitry - enables safe fast-charging from low-power adapters. |
| No-audible-noise buck regulation | Operates silently even with ceramic output capacitors - essential for noise-sensitive portable instrumentation and medical devices. |
Applications
| Portable Computers | Portable Test Instruments |
|---|---|
Use Scenario: Dual-battery laptop requiring hot-swappable runtime extension and adapter-assisted fast charging. IC Role / Device Role / Timing Role: Dual-battery charger/selector managing charge distribution, PowerPath arbitration, and SPI-based host coordination. Use Value: Enables >10% longer runtime via simultaneous discharge and up to 50% faster recharge versus sequential methods - validated with 10.8V Li-ion (MOLTECH NI2020). |
Use Scenario: Handheld oscilloscope or multimeter needing reliable battery backup during field measurements. IC Role / Device Role / Timing Role: Autonomous power-source manager ensuring zero-interruption switchover (<10µs) between AC adapter and dual Li-ion packs. Use Value: Eliminates measurement gaps during adapter removal - critical for capturing transient events in industrial diagnostics. |
| Medical Portable Devices | Ruggedized Data Collectors |
Use Scenario: Battery-powered patient monitor requiring fail-safe power continuity and regulated charging. IC Role / Device Role / Timing Role: Safety-critical PowerPath controller with hardware-enforced short-circuit protection (SCP/SCN) and UVLO (3.5V threshold). Use Value: Prevents system crash during battery swap; maintains operation through adapter brownouts - meets IEC 60601-1 auxiliary power requirements. |
Use Scenario: Field-deployed environmental sensor node operating on dual NiMH batteries with intermittent solar charging. IC Role / Device Role / Timing Role: Dual-chemistry charger supporting NiMH (12V) and Li-ion, with programmable VDAC/IDAC for chemistry-specific profiles. Use Value: Delivers 5% current accuracy and 0.8% voltage accuracy - ensures consistent charge termination and cycle longevity across temperature ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-battery charger/selector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24725ARHBT | 4-wire SMBus interface (not SPI); supports only single-battery charging per cycle; lacks simultaneous dual-battery discharge capability. | Targeted at enterprise docking stations - not suitable for portable systems requiring runtime extension via dual-battery discharge. | Select LTC1960CG#TRPBF when simultaneous dual-battery discharge (>10% runtime gain) and SPI-based host control are required. |
| MAX1772EUB+ | Single-battery focus; no integrated PowerPath arbitration; requires external logic for dual-source management; no VDAC/IDAC. | Designed for cost-sensitive single-battery chargers - lacks autonomous switchover, dual-charge, or SBS compliance. | Choose LTC1960CG#TRPBF for full SBS-compliant dual-battery systems with hardware-accelerated PowerPath and SPI configurability. |
Compared with BQ24725ARHBT and MAX1772EUB+, the LTC1960CG#TRPBF uniquely integrates SPI-controlled dual-charge/dual-discharge, sub-10µs autonomous PowerPath switching, and precision DACs - enabling higher system-level efficiency and reduced firmware complexity in portable dual-battery platforms.
Availability
LTC1960CG#TRPBF is available at Aetrix Electronics and suitable for portable computers, portable test instruments, and medical portable devices requiring stable component supply, long-term lifecycle support, and SBS-compliant dual-battery management.
Supply support for LTC1960CG#TRPBF 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 LTC1960CG#TRPBF belongs to Analog Devices' Power Management product line, engineered specifically for intelligent, dual-battery portable systems requiring autonomous power-path control, high-efficiency charging, and robust SPI-based system integration.
FAQ
What is the operating temperature range for the LTC1960CG#TRPBF?
The LTC1960CG#TRPBF is rated for 0°C to 70°C ambient operation (C-grade). Its junction temperature range is –40°C to 125°C, and thermal performance is optimized for the 38-pin QFN package with θJA = 34°C/W - making it suitable for thermally constrained portable enclosures where the LTC1960CG#TRPBF operates reliably within specification without forced airflow.
Does the LTC1960CG#TRPBF support simultaneous charging of two different battery chemistries?
The LTC1960CG#TRPBF supports simultaneous charging of two batteries regardless of chemistry (e.g., Li-ion + NiMH), provided both operate within its 6V–28V voltage range and share compatible charge voltage/current profiles. However, optimal safety requires external firmware coordination - the LTC1960CG#TRPBF itself does not auto-detect or adapt to chemistry-specific termination algorithms.
How does the LTC1960CG#TRPBF achieve <10µs PowerPath switching?
The LTC1960CG#TRPBF achieves <10µs switchover using dedicated, always-active comparator circuits (LOPWR and DCDIV) that directly drive gate drivers (GB1O/GB2O/GDCO) without MCU involvement. When LOPWR falls below 1.19V or DCDIV exceeds its threshold, internal logic asserts gate signals within 5–10µs - verified in Typical Performance Characteristic G06 and documented in the PowerPath section of the datasheet.
Can the LTC1960CG#TRPBF operate without an external microcontroller?
The LTC1960CG#TRPBF requires an external microcontroller for initial configuration and dynamic control (e.g., battery selection, charge parameters), but performs critical autonomous functions - including PowerPath switchover, short-circuit shutdown, UVLO recovery, and watchdog-timed charge updates - without MCU interaction. Thus, the LTC1960CG#TRPBF reduces firmware burden but is not fully standalone.
What is the purpose of the VSET, ITH, and ISET pins on the LTC1960CG#TRPBF?
VSET sets the battery charge voltage via resistor divider feedback to the 11-bit VDAC; ITH controls charge current magnitude as the input to the inner current loop amplifier; ISET filters delta-sigma IDAC output noise with a mandatory capacitor to ground. Together, these pins enable precise, decoupled regulation of voltage and current - a core capability distinguishing the LTC1960CG#TRPBF from fixed-parameter chargers.
LTC1960CG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Smart Batteries
- Number of Cells:
- 2
- Current - Charging:
- -
- Programmable Features:
- -
- Fault Protection:
- Over Current
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 28V
- Interface:
- SPI
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-SSOP
LTC1960CG#TRPBF FAQ
1.How can I place an order for LTC1960CG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1960CG#TRPBF 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 LTC1960CG#TRPBF reliable?
The price and inventory of LTC1960CG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1960CG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1960CG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1960CG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1960CG#TRPBF?
LTC1960CG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1960CG#TRPBF 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 LTC1960CG#TRPBF?
For technical support, including LTC1960CG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1960CG#TRPBF requirements.
6.How does Aetrix verify that LTC1960CG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1960CG#TRPBF 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 LTC1960CG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1960CG#TRPBF?
All LTC1960CG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1960CG#TRPBF, 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 LTC1960CG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1960CG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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