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Analog Devices Inc. LTC4013EUFD#TRPBF
- Part No.:
- LTC4013EUFD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC4013EUFD#TRPBF.pdf
- Description:
- IC BATT CHG MULT-CHEM 6CEL 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,319
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Product details
Overview
LTC4013EUFD#TRPBF from Analog Devices (formerly Linear Technology) is a high-voltage, synchronous buck battery charger IC designed for multi-chemistry charging-primarily 2.4V–60V lead-acid (vented/sealed) and Li-Ion/LiFePO₄ batteries. It delivers up to 5A charge current using external N-channel MOSFETs, supports MPPT input regulation for solar sources, and implements ±0.5% float voltage accuracy with NTC temperature compensation.
For engineers reviewing the LTC4013EUFD#TRPBF datasheet, LTC4013EUFD#TRPBF pinout, LTC4013EUFD#TRPBF application, or LTC4013EUFD#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed charging algorithm modes (2/3/4-stage lead-acid, Li-Ion CV/CC), real-world MPPT timing behavior (10.2s sampling interval, 271µs pulse width), and precise thermal performance data (θJC = 3.4°C/W, θJA = 43°C/W).
Technical Context
The LTC4013EUFD#TRPBF integrates a fixed-frequency average-current-mode synchronous buck controller with dual gate drivers (TG/BG), an internal 5V INTVCC LDO, and dedicated analog blocks for MPPT sampling (10.2s interval), battery voltage regulation (FB servo at 2.244–2.627V depending on MODE1/MODE2), and C/10 termination detection (2.0–7.0mV threshold). Its error amplifier transconductance (1300–2300 µmho) and non-overlap timing (40ns TG→BG, 74ns BG→TG) are optimized for stable high-current regulation with external low-RDS(ON) MOSFETs.
Charging state transitions are governed by hardware-configurable MODE1/MODE2 pins selecting among 2-stage (CC/CV), 3-stage (bulk/absorption/float), 4-stage (bulk/absorption/equalization/float), or Li-Ion profiles-with absorption/equalization times set via TMR capacitor (e.g., 3.03hr EOC timeout with 0.2µF). MPPT operation requires FBOC < 3.0V and triggers periodic 1ms regulator pauses to sample open-circuit input voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide-range DC sources including solar panels, industrial rails, and automotive systems without external pre-regulation. |
| Battery Voltage Range | 2.4V to 60V - enables direct charging of 1–16-cell lead-acid stacks or 1–15S Li-Ion packs without level-shifting circuitry. |
| Charge Current Accuracy | ±5% - ensures predictable C-rate delivery across temperature (–40°C to 125°C) using external sense resistor (ICHG = 50mV/RSENSE). |
| Float Voltage Accuracy | ±0.5% - guarantees tight regulation of battery terminal voltage during maintenance phase, critical for sealed lead-acid longevity. |
| MPPT Sampling Interval | 10.2 seconds - balances solar panel power optimization against charging continuity; includes 720µs open-circuit settling and 300µs FBOC sampling. |
| Switching Frequency Range | 200kHz to 1MHz - adjustable via RT resistor; higher frequencies allow smaller inductors but increase switching losses in high-current designs. |
| Thermal Resistance | θJC = 3.4°C/W, θJA = 43°C/W - requires exposed pad (Pin 29, SGND) soldered to PCB ground plane for rated 125°C junction operation. |
Pinout & Package
Package: 28-lead 4mm × 5mm plastic QFN (UFD) with exposed thermal pad (Pin 29 = SGND), rated for –40°C to 125°C operating junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INFET (1) | Input PowerPath MOSFET gate driver | Internal charge pump drives external N-FET to block reverse current when DCIN < VBAT - prevents battery discharge into input source. |
| DCIN (2) | Input supply sense & INFET power | Senses input voltage for INFET control and supplies charge pump; must be connected to same rail as VIN_S for Kelvin sensing. |
| MPPT (3), FBOC (4) | MPPT regulation loop inputs | FBOC sets target % of open-circuit voltage; MPPT compares instantaneous DCIN to stored DAC value - enables solar MPP tracking without MCU. |
| ENAB (5) | Precision enable input | 1.22V rising threshold with 170mV hysteresis - allows clean startup/shutdown and eliminates false triggering in noisy environments. |
| ISMON (6) | Charge current monitor output | Voltage = 20×(VSENSE–VBAT); provides isolated analog current readback for system telemetry or safety monitoring. |
| STAT0/STAT1 (7,8) | Open-drain status indicators | Drive LEDs directly (5mA sink capability); encode charge state (bulk, absorption, float, fault) per Table 2 in datasheet. |
| TMR (10) | Timer capacitor connection | Capacitor to ground sets absorption/equalization timeouts (e.g., 0.2µF → 3.03hr EOC, 0.758hr equalization); grounding disables all timer functions. |
| MODE1/MODE2 (11,12) | Charge algorithm selection | Tri-state inputs (L/M/H) configure 2/3/4-stage lead-acid or Li-Ion profiles - no software or configuration registers required. |
| RT (15) | Switching frequency programming | Resistor to ground sets oscillator frequency (200kHz–1MHz); SYNC pin allows external clock synchronization for EMI reduction. |
| NTC (17) | Temperature compensation input | Accepts NTC thermistor divider; gain = 0.21 V/V, offset ≤ ±15mV - adjusts float voltage per battery temp coefficient (disabled for Li-Ion). |
| FB (18) | Constant-voltage feedback | Regulates battery voltage during CV phase; reference levels range 2.244–2.627V depending on MODE pins - scales to multi-cell packs via resistor divider. |
| SENSE/BAT (19,20) | Current sense differential inputs | 50mV servo voltage sets max charge current (ICHG = 50mV/RSENSE); overcurrent shutdown at 100mV protects battery and FETs. |
| BST (21) | High-side gate drive bootstrap supply | 5V flying supply for TG driver; requires 0.22µF capacitor to SW and diode from INTVCC - enables high-side N-FET operation without isolated supply. |
| TG/BG (22,24) | Top/bottom gate drivers | Drive external N-channel MOSFETs; non-overlap timing (40ns/74ns) prevents shoot-through; RDS(ON) = 1.3–2.3Ω ensures fast switching. |
| INTVCC (25) | Internal 5V regulator output | Powers internal logic/analog circuits; supplies BST refresh diode; requires ceramic bypass capacitor - failure here halts all regulation. |
| PGND (26) | Power ground return | Return path only for BG driver - must be routed separately from SGND to avoid noise coupling into sensitive analog circuits. |
| VIN (27) | Main input supply for INTVCC | Connects to high-side MOSFET source or input rail; supplies 5V LDO - not used for current sensing (VIN_S handles that). |
| VIN_S (28) | Kelvin input sense for PowerPath | Provides remote sensing of VIN for accurate INFET control - eliminates IR drop errors in high-current paths. |
| SGND (29) | Signal ground reference | Quiet ground for FB, MPPT, NTC dividers; must connect to battery negative and output cap cathode - thermal pad soldering mandatory for spec compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-configurable charge algorithms | MODE1/MODE2 pins select 2/3/4-stage lead-acid or Li-Ion profiles without firmware - reduces BOM and design cycle time. |
| Integrated MPPT with autonomous sampling | 10.2s open-circuit voltage measurement and DAC-based regulation - enables solar charging without external microcontroller or ADC. |
| NTC temperature compensation with precision gain | 0.21 V/V gain and ≤±15mV offset - delivers accurate battery voltage derating across –40°C to 125°C for extended cycle life. |
| Dual open-drain status outputs | STAT0/STAT1 sink 5mA each - drive indicator LEDs directly for real-time charge state visibility without external drivers. |
| Thermally enhanced QFN package | Exposed SGND pad with θJC = 3.4°C/W - sustains 5A continuous charge current with proper PCB copper area and via count. |
| Programmable safety timers | TMR capacitor sets absorption/equalization durations (e.g., 0.379hr–3.03hr) - prevents overcharge in case of sensor or feedback failure. |
Applications
| Solar-Powered Off-Grid Systems | Industrial UPS Backup |
|---|---|
Use Scenario: Charging 48V sealed lead-acid battery banks from 60V solar arrays in remote telecom shelters with no grid connectivity. IC Role / Device Role / Timing Role: LTC4013EUFD#TRPBF acts as the primary MPPT-enabled buck charger, regulating charge current to maintain solar panel voltage at maximum power point while executing 4-stage (bulk/absorption/equalization/float) lead-acid profile. Use Value: Autonomous 10.2s MPPT sampling and 2.267V/cell float voltage accuracy extend battery service life by >25% versus non-compensated chargers in variable irradiance conditions. |
Use Scenario: Providing backup power for programmable logic controllers (PLCs) in factory automation systems requiring >10-year battery reliability. IC Role / Device Role / Timing Role: LTC4013EUFD#TRPBF manages 24V vented lead-acid battery charging with NTC compensation and 3-stage (bulk/absorption/float) cycling, triggered by AC mains loss detection. Use Value: ±0.5% float voltage accuracy and programmable absorption timeout prevent sulfation and water loss, achieving 98% capacity retention after 5 years at 25°C. |
| Medical Portable Defibrillators | Security Camera Battery Packs |
Use Scenario: Fast-charging LiFePO₄ battery modules (25.6V, 10Ah) in portable AED devices with strict safety and runtime requirements. IC Role / Device Role / Timing Role: LTC4013EUFD#TRPBF executes Li-Ion CC/CV profile with C/10 termination and 2.355V/cell absorption voltage, monitored via ISMON for real-time current telemetry. Use Value: ±5% charge current accuracy and hardware-based C/10 cutoff ensure consistent 2-hour recharge cycles and eliminate risk of overcharge-induced thermal runaway. |
Use Scenario: Maintaining 12V AGM batteries in outdoor IP67 security cameras powered by hybrid solar/battery systems with intermittent sunlight. IC Role / Device Role / Timing Role: LTC4013EUFD#TRPBF performs 3-stage lead-acid charging with low-battery restart (LB pin) and MPPT regulation to maximize daily energy harvest under partial shading. Use Value: Burst-mode MPPT operation at <5mV SENSE–BAT extends usable solar window by 40 minutes per day in low-light conditions, preventing premature brownouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-chemistry battery charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24618RGER | Lower max input voltage (55V vs 60V); no MPPT; uses integrated FETs (lower efficiency at >3A) | Best for cost-sensitive 12V/24V lead-acid charging without solar input; lacks equalization mode and NTC compensation | Select when board space is constrained and solar MPPT is unnecessary; verify thermal limits at 5A with integrated FETs. |
| MAX17710G+T | Designed for ultra-low-power Li-Ion only (1.5–5.5V battery); no lead-acid support; 200mA max charge current | Targeted at coin-cell–powered IoT sensors - incompatible with lead-acid or >500mA applications | Not suitable as functional alternative; only consider for niche Li-Ion micro-power applications where LTC4013EUFD#TRPBF's voltage/current range is excessive. |
Compared with BQ24618RGER and MAX17710G+T, the LTC4013EUFD#TRPBF uniquely combines 60V input tolerance, autonomous MPPT, hardware-selectable 4-stage lead-acid charging, and 5A capability - making it the sole option for high-reliability solar-charged industrial UPS and medical battery systems requiring field-proven robustness.
Availability
LTC4013EUFD#TRPBF is available at Aetrix Electronics and suitable for solar-powered off-grid systems, industrial UPS backup, portable medical equipment, and security camera battery packs requiring stable component supply and long-term manufacturability.
Supply support for LTC4013EUFD#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 LTC4013EUFD#TRPBF belongs to Linear's high-voltage battery management IC product line, engineered specifically for ruggedized, multi-chemistry charging in harsh environments - emphasizing MPPT autonomy, hardware configurability, and thermal resilience over software dependency.
FAQ
What battery chemistries does the LTC4013EUFD#TRPBF officially support?
The LTC4013EUFD#TRPBF officially supports lead-acid (vented and sealed), Li-Ion, Li-Polymer, and LiFePO₄ batteries. Its MODE1/MODE2 pins configure specific charge profiles: 2-stage (CC/CV), 3-stage (bulk/absorption/float), 4-stage (bulk/absorption/equalization/float) for lead-acid, and CC/CV with C/10 or timer termination for lithium chemistries. The datasheet explicitly excludes NiCd/NiMH and confirms NTC compensation is disabled for Li-Ion via NTC-to-INTVCC strapping.
How does the MPPT function operate in the LTC4013EUFD#TRPBF without external microcontroller intervention?
The LTC4013EUFD#TRPBF implements fully autonomous MPPT by pausing switching every 10.2 seconds for ~1ms, measuring open-circuit input voltage via the FBOC pin, storing it internally as a DAC voltage, then regulating charge current to maintain DCIN at that stored level. This occurs without firmware, clocks, or external components - the MPPT loop only requires resistor dividers on MPPT/FBOC pins and is enabled when FBOC voltage is <3.0V.
What is the role of the exposed pad (Pin 29) on the LTC4013EUFD#TRPBF QFN package?
The exposed pad (Pin 29) is SGND - signal ground reference - and must be soldered to the PCB ground plane with multiple thermal vias. It serves as the quiet ground for critical analog circuits (FB, MPPT, NTC dividers) and provides the primary thermal path (θJC = 3.4°C/W). Leaving it unconnected violates Absolute Maximum Ratings and causes thermal shutdown or parameter drift beyond spec.
Can the LTC4013EUFD#TRPBF charge a 48V lead-acid battery, and what FB voltage setting is required?
Yes, the LTC4013EUFD#TRPBF supports 48V lead-acid batteries (within its 2.4V–60V range). For a 48V (24-cell) battery, use the standard 2.267V/cell float voltage: set FB voltage to 2.267V via resistor divider, then scale total battery voltage as VBAT = 2.267V × 24 = 54.4V. The FB pin regulates precisely to the programmed reference, enabling accurate multi-cell stack control.
What happens if the TMR capacitor is omitted or shorted on the LTC4013EUFD#TRPBF?
If the TMR capacitor is omitted (open) or shorted to ground, all timer-dependent functions disable: absorption-to-float transition, equalization timeout, and Li-Ion CV termination default to infinite duration. Charging remains in bulk or absorption indefinitely until manually interrupted, risking overcharge. The datasheet mandates a capacitor ≥1nF for any timed operation; grounding TMR is explicitly defined as disabling all timer features.
LTC4013EUFD#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)
LTC4013EUFD#TRPBF FAQ
1.How can I place an order for LTC4013EUFD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4013EUFD#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 LTC4013EUFD#TRPBF reliable?
The price and inventory of LTC4013EUFD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4013EUFD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4013EUFD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4013EUFD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4013EUFD#TRPBF?
LTC4013EUFD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4013EUFD#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 LTC4013EUFD#TRPBF?
For technical support, including LTC4013EUFD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4013EUFD#TRPBF requirements.
6.How does Aetrix verify that LTC4013EUFD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4013EUFD#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 LTC4013EUFD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4013EUFD#TRPBF?
All LTC4013EUFD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4013EUFD#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 LTC4013EUFD#TRPBF part is unused and in its original packaging.
Return procedure for LTC4013EUFD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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