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Analog Devices Inc. LTC4013IUFD#TRPBF
- Part No.:
- LTC4013IUFD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC4013IUFD#TRPBF.pdf
- Description:
- IC BATT CHG MULT-CHEM 6CEL 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,717
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Product details
Overview
LTC4013IUFD#TRPBF from Analog Devices (formerly Linear Technology) is a high-voltage, synchronous buck battery charger IC designed for multi-chemistry charging-primarily 2–6 cell lead-acid (12.6V–25.2V) and Li-Ion/Polymer/LiFePO₄ batteries. It delivers up to 5A charge current with ±0.5% float voltage accuracy, ±5% charge current accuracy, and supports MPPT input regulation for solar applications. It operates across 4.5V–60V input and 2.4V–60V battery voltage ranges.
For engineers reviewing the LTC4013IUFD#TRPBF datasheet, LTC4013IUFD#TRPBF pinout, LTC4013IUFD#TRPBF application, or LTC4013IUFD#TRPBF equivalent, key selection considerations include its 28-pin 4mm × 5mm QFN package, programmable absorption/equalization timing via TMR capacitor, NTC-based temperature-compensated voltage control, and dual open-drain STAT pins for state monitoring in UPS, solar, and industrial backup systems.
Technical Context
The LTC4013IUFD#TRPBF implements a fixed-frequency average-current-mode synchronous buck controller using external N-channel MOSFETs (TG/BG drive), with resistor-programmable switching frequency (200kHz–1MHz) or external SYNC capability. Its dual-loop architecture combines constant-current (50mV SENSE–BAT servo) and constant-voltage (FB-regulated) control, with selectable charge profiles including 2-, 3-, and 4-stage lead-acid and Li-Ion CV/CC termination.
MPPT functionality operates via periodic open-circuit voltage sampling (every 10.2s, ~1ms pause) and DAC-based regulation of DCIN against FBOC-set threshold; NTC compensation uses a precision 20µA current source (LB pin) and amplifier gain of 0.21 V/V to adjust FB reference versus temperature. The IC integrates INFET gate drive for input power-path isolation and thermal shutdown at 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide-range sources including solar panels, industrial DC rails, and automotive systems. |
| Battery Voltage Range | 2.4V to 60V - covers 1S–16S Li-Ion, 1–12S lead-acid (e.g., 12.6V/25.2V nominal), and LiFePO₄ stacks. |
| Max Charge Current | Programmable up to 5A via external sense resistor - enables high-power backup and portable medical charging. |
| Float Voltage Accuracy | ±0.5% - ensures precise long-term maintenance of sealed/vented lead-acid batteries without overcharge risk. |
| Charge Current Accuracy | ±5% - guarantees reliable C/10 termination and consistent bulk-phase delivery across temperature. |
| MPPT Sampling Interval | 10.2s - balances solar panel tracking responsiveness with minimal charging interruption. |
| NTC Amplifier Gain | 0.21 V/V - provides linear, calibrated temperature coefficient for battery voltage compensation. |
| Operating Junction Temp | –40°C to +125°C - rated for harsh industrial, outdoor, and automotive under-hood environments. |
Pinout & Package
Package: 28-lead 4mm × 5mm plastic QFN (UFD) with exposed SGND pad (Pin 29) requiring PCB soldering for thermal and signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INFET (1) | Input PowerPath MOSFET gate driver | Drives external N-FET to block reverse discharge when DCIN < BAT - critical for solar/battery hybrid systems. |
| DCIN (2) | Main input supply sense & power | Senses input voltage for UVLO and powers INFET charge pump - requires Kelvin connection for accurate regulation. |
| MPPT (3), FBOC (4) | MPPT loop set-point inputs | Resistor divider defines % of open-circuit voltage for solar MPPT; FBOC < 3V enables MPPT mode. |
| ENAB (5) | Precision enable input | 1.22V rising threshold with 170mV hysteresis - enables clean startup/shutdown sequencing. |
| STAT0 / STAT1 (7, 8) | Open-drain status outputs | Drive LEDs or microcontroller GPIOs to indicate CHARGING, FLOAT, FAULT, or TIMER EXPIRY states. |
| TMR (10) | Timer capacitor connection | Capacitor sets absorption/equalization timeout (e.g., 0.2µF = 3.03hr EOC, 0.758hr EQ); grounding disables timer. |
| MODE1 / MODE2 (11, 12) | Charge algorithm selector | Tri-state pins configure 2-/3-/4-stage lead-acid or Li-Ion profiles - floating/INTVCC/GND straps define behavior. |
| BAT / SENSE (19, 20) | Current sense differential pair | 50mV servo voltage sets ICHG = 50mV/RSENSE; >100mV triggers overcurrent shutdown. |
| TG / BG (22, 24) | Top/bottom gate drivers | Drive external N-MOSFETs with non-overlap timing (40ns/74ns) - enables high-efficiency synchronous rectification. |
| SGND (29) | Signal ground reference | Quiet analog reference for FB, MPPT, and NTC dividers - must connect to battery negative and decoupling cap. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-chemistry charge algorithms | Configurable 2-/3-/4-stage lead-acid (bulk/absorption/float/equalization) and Li-Ion CC/CV with C/10 or timer termination. |
| MPPT input regulation | Automatic solar panel optimization via 10.2s open-circuit sampling and DAC-based voltage regulation - no MCU required. |
| NTC temperature compensation | Integrated 20µA current source and 0.21 V/V gain amplifier enable precise, linear battery voltage adjustment vs. temperature. |
| Input power-path control | INFET gate driver with reverse-turn-off threshold (–4.4mV) prevents battery discharge into low-input sources. |
| Thermally enhanced QFN | θJA = 43°C/W with exposed SGND pad - supports 5A continuous operation at 125°C junction temperature. |
| Dual open-drain status outputs | STAT0/STAT1 sink 5mA each - directly drive LEDs or interface with logic-level microcontrollers for real-time state reporting. |
Applications
| Solar-Powered Battery Backup | Industrial UPS Systems |
|---|---|
Use Scenario: Off-grid telecom base stations powered by 48V solar arrays with 24V lead-acid battery banks. IC Role / Device Role / Timing Role: LTC4013IUFD#TRPBF acts as MPPT-enabled synchronous buck charger, managing bulk-to-float transition and equalization cycles. Use Value: Maintains >92% efficiency at 5A while extending battery life via temperature-compensated float voltage and periodic equalization. |
Use Scenario: Factory automation PLCs requiring uninterrupted 24V DC power during AC mains failure. IC Role / Device Role / Timing Role: LTC4013IUFD#TRPBF serves as primary battery charger with INFET-controlled input isolation and dual STAT pin fault signaling. Use Value: Enables seamless switchover and rapid recharge using wide 4.5V–60V input range and ±0.5% voltage regulation accuracy. |
| Portable Medical Equipment | Security Camera Battery Management |
Use Scenario: Mobile ultrasound devices with hot-swappable LiFePO₄ battery packs (25.6V, 10Ah). IC Role / Device Role / Timing Role: LTC4013IUFD#TRPBF executes LiFePO₄-specific CC/CV charging with programmable absorption time and C/10 termination. Use Value: Ensures safe, full-capacity charging with ±5% current accuracy and integrated safety timer - compliant with IEC 62368-1. |
Use Scenario: Outdoor IP67 security cameras powered by 12V sealed lead-acid batteries charged from PoE+ or 24V DC input. IC Role / Device Role / Timing Role: LTC4013IUFD#TRPBF performs 3-stage charging (bulk/absorption/float) with NTC compensation for outdoor temperature swings. Use Value: Prevents undercharging in cold weather and overcharging in heat via real-time voltage adjustment - extends battery cycle life by >40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-chemistry battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24616RTVR | Lower max input voltage (28V), no MPPT, fixed 3-stage lead-acid only, 4mm × 4mm QFN-20 | Lacks solar optimization and Li-Ion support; suitable only for basic 12V/24V industrial chargers | Select if cost-sensitive and MPPT/Li-Ion not required; verify input voltage compatibility. |
| MAX17712G20+ | Higher integration (integrated MOSFETs), 36V max input, supports SMBus but no NTC compensation | Eliminates external FETs but sacrifices thermal design flexibility and temperature-aware charging | Choose for space-constrained designs where board area > efficiency/temp performance. |
Compared with BQ24616RTVR and MAX17712G20+, the LTC4013IUFD#TRPBF uniquely combines 60V input capability, MPPT, NTC compensation, and configurable multi-chemistry algorithms in a thermally robust QFN - making it optimal for solar, industrial, and medical applications demanding reliability across wide environmental conditions.
Availability
LTC4013IUFD#TRPBF is available at Aetrix Electronics and suitable for solar-powered battery backup, industrial UPS systems, and portable medical equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4013IUFD#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC4013IUFD#TRPBF belongs to Linear's high-voltage battery charger product line, engineered specifically for rugged, multi-chemistry energy storage systems where precision, efficiency, and field reliability are critical - especially in solar, backup power, and portable instrumentation.
FAQ
What battery chemistries does the LTC4013IUFD#TRPBF support?
The LTC4013IUFD#TRPBF supports lead-acid (vented/sealed, 2–6 cell), Li-Ion, Li-Polymer, and LiFePO₄ batteries. It implements dedicated charge profiles - including 4-stage lead-acid with equalization and Li-Ion CC/CV with C/10 or timer termination - all selected via MODE1/MODE2 pin strapping. Its 2.4V–60V battery voltage range accommodates single-cell to 16S configurations.
How does MPPT work on the LTC4013IUFD#TRPBF?
The LTC4013IUFD#TRPBF performs true hardware-based MPPT by pausing charging every 10.2 seconds to measure open-circuit input voltage via the FBOC pin, storing it digitally, and regulating DCIN to maintain that voltage level during active charging. This occurs without MCU intervention and maintains >92% efficiency at 5A - ideal for solar-powered remote installations.
What is the role of the INFET pin on the LTC4013IUFD#TRPBF?
The INFET pin (Pin 1) on the LTC4013IUFD#TRPBF drives the gate of an external N-channel MOSFET to isolate the battery from the input source when DCIN falls below BAT voltage - preventing reverse discharge. Its turn-off threshold is –4.4mV (DCIN – VIN), enabling automatic power-path control in solar and dual-source systems without additional circuitry.
Can the LTC4013IUFD#TRPBF be used without NTC thermistor compensation?
Yes - the LTC4013IUFD#TRPBF operates fully without NTC compensation. To disable it, tie the NTC pin (Pin 17) to INTVCC (5V). All charge voltage references (float, absorption, equalization) then remain fixed. NTC is optional and recommended only for lead-acid applications subject to ambient temperature variation; it is explicitly not intended for Li-Ion batteries.
What is the maximum achievable charge current with the LTC4013IUFD#TRPBF?
The LTC4013IUFD#TRPBF supports up to 5A charge current, determined by the external sense resistor value (RSENSE = 50mV / ICHG). For 5A, RSENSE = 10mΩ. Current accuracy is ±5% over –40°C to +125°C, and thermal performance is validated with the exposed SGND pad soldered to PCB - enabling sustained 5A operation in industrial environments.
LTC4013IUFD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 6
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current
- Fault Protection:
- Over Current, Over Temperature
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 60V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x5)
LTC4013IUFD#TRPBF FAQ
1.How can I place an order for LTC4013IUFD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4013IUFD#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 LTC4013IUFD#TRPBF reliable?
The price and inventory of LTC4013IUFD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4013IUFD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4013IUFD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4013IUFD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4013IUFD#TRPBF?
LTC4013IUFD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4013IUFD#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 LTC4013IUFD#TRPBF?
For technical support, including LTC4013IUFD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4013IUFD#TRPBF requirements.
6.How does Aetrix verify that LTC4013IUFD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4013IUFD#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 LTC4013IUFD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4013IUFD#TRPBF?
All LTC4013IUFD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4013IUFD#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 LTC4013IUFD#TRPBF part is unused and in its original packaging.
Return procedure for LTC4013IUFD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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