LTC4015EUHF#PBF - 20A Multi-Chemistry Charger Controller | ADI
Référence : LTC4015EUHF#PBF ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $11.3946 | $11,39 |
| 10 | $10.5 | $105,00 |
| 100 | $9.4 | $940,00 |
| 500 | $8.3 | $4 150,00 |
| 1 000 | $7.25 | $7 250,00 |
LTC4015EUHF#PBF Présentation
A buck battery charger controller is a switching-mode power supply stage that steps down a higher input voltage to the battery stack voltage while regulating charge current and termination. Within the power management hierarchy, the LTC4015 sits above the discrete MOSFETs and inductor that form the synchronous buck converter - the controller provides the control loop, gate drivers, sensing, and telemetry. Compared with linear charger ICs, a buck topology wastes far less power when the input-to-battery voltage delta is significant, making the LTC4015EUHF#PBF suited to high-current packs where thermal dissipation must be minimized.
Key features include digital telemetry for VIN, IIN, VBAT, IBAT, on-chip die temperature, and thermistor measurement; safety timer with charge-termination algorithms; under-voltage lockout, overvoltage protection, and reverse-current blocking; constant-current / constant-voltage / trickle-charge profile; I2C configuration of all major parameters; and automatic recharge. The 38-lead QFN with exposed pad provides a low thermal resistance path to PCB copper. The synchronous buck control supports high efficiency across a wide VIN range, reducing heatsinking in space-constrained battery systems.
The LTC4015EUHF uses a constant-frequency current-mode control architecture with cycle-by-cycle current limit, paired with an internal charge-management state machine that sequences pre-charge, fast-charge constant-current, constant-voltage, and termination. A digital telemetry block converts the analog sense signals through an internal ADC and exposes them over I2C, eliminating the need for external A/D converters in MCU-supervised battery systems. Programming flexibility is achieved through external resistor dividers on the FB and PROG pins plus I2C registers for chemistry, charge voltage, charge current, input current limit, and timer settings.
Typical applications include 2-cell to 9-cell Li-Ion/LiFePO4 battery packs, 3-/6-/12-cell Lead-Acid chargers, e-mobility battery management, industrial backup power systems, portable medical carts, telecom battery backup, and solar MPPT battery charge subsystems. The Demonstration Circuit DC2039A shows the part configured as a 2-cell Li-Ion, 8 A charger.
When designing with the LTC4015EUHF#PBF, select the external sense resistors carefully to set charge and input current accurately. Ensure the input capacitor and the inductor are sized for the worst-case ripple current at minimum VIN, and keep the battery sense traces short and Kelvin-routed to the sense resistor. Use I2C for production calibration of the telemetry gains when high-accuracy reporting is required.
This page synthesizes distributor stock, pricing, drop-in alternatives, and practical design notes not collected in any single source.
Alternatives de remplacement direct pour LTC4015EUHF#PBF — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LTC4015EUHF#PBF (même facteur de forme et même empreinte) — différant par Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LTC4015IUHF#PBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC4015EUHF#TRPBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC4015IUHF#TRPBF
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$7.8 / unité
Voir la fiche technique →LTC4015EUHF
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LTC4015EUHF#PBF Spécifications
| Battery Chemistry Supported | Lead-Acid, LiFePO4, Li-Ion, Li-Polymer |
| Input Voltage (VIN) | 35 V maximum |
| Battery Charge Voltage | 4.2 V (per cell reference, pin-selectable and I2C adjustable) |
| Maximum Charge Current | 20 A |
| Charger Topology | Synchronous buck controller with external MOSFETs |
| Boîtier | 38-pin QFN-EP (5x7 mm) |
| Type de montage | Surface Mount |
| Operating Temperature (LTC4015E) | -40C to +125C junction (E suffix 0C to 85C spec) |
| Configuration Interface | I2C digital telemetry and control |
| Telemetry Parameters | VIN, IIN, VBAT, IBAT, die temperature, thermistor |
| Safety Features | Safety timer, automatic recharge, overvoltage protection, reverse-current blocking, under-voltage lockout |
| Charge Profile | Constant-current / constant-voltage with trickle pre-charge and termination |
| Supported Cell Counts | Up to 9 Li-Ion/LiFePO4 cells; 3, 6, or 12 Lead-Acid cells (DC2039A reference) |
| Reference Design | DC2039A (2-cell Li-Ion, 8 A demo) |
| Lead Finish | Au (Pb-free, PBF) |
| Statut RoHS | Compliant |
Configuration des broches de LTC4015EUHF#PBF
| Broche 1 | VIN — Input supply voltage (35 V max) |
| Broche 2 | INTVCC — Internal 5 V LDO output, bypass with capacitor |
| Broche 3 | EN — Enable input (active high) |
| Broche 4 | SCL — I2C clock input |
| Broche 5 | SDA — I2C data input/output |
| Broche 6 | ADDR — I2C address select |
| Broche 7 | CHEM — Chemistry select pin |
| Broche 8 | FB — Battery voltage feedback |
| Broche 9 | PROG — Charge current programming |
| Broche 10 | ILIM — Input current limit programming |
| Broche 11 | ITH — Current loop compensation |
| Broche 12 | VOUT — Buck output to inductor |
| Broche 13 | SW — Switch node |
| Broche 14 | BOOST — Bootstrap supply for top gate driver |
| Broche 15 | TG1 — Top gate driver 1 |
| Broche 16 | BG1 — Bottom gate driver 1 |
| Broche 17 | TG2 — Top gate driver 2 |
| Broche 18 | BG2 — Bottom gate driver 2 |
| Broche 19 | SENSE+ — Current sense positive |
| Broche 20 | SENSE- — Current sense negative |
| Broche 21 | NTC — Thermistor input |
| Broche 22 | TMR — Safety timer programming |
| Broche 23 | CHRG — Charge status output |
| Broche 24 | FAULT — Fault indicator output |
| Broche 25 | PGOOD — Power good indicator |
| Broche 26 | GND — Ground |
| Broche 27 | GND — Ground |
| Broche 28 | BAT — Battery connection |
| Broche 29 | BAT — Battery connection |
| Broche 30 | VSYS — System output rail |
| Broche 31 | VCC — Driver supply |
| Broche 32 | NC — Not connected (per datasheet) |
| Broche 33 | NC — Not connected (per datasheet) |
| Broche 34 | NC — Not connected (per datasheet) |
| Broche 35 | NC — Not connected (per datasheet) |
| Broche 36 | NC — Not connected (per datasheet) |
| Broche 37 | NC — Not connected (per datasheet) |
| Broche 38 | EP — Exposed pad - thermal and ground |
Applications typiques
LTC4015EUHF#PBF convient pour 7 applications: Multi-Cell Li-Ion / LiFePO4 Battery Charger, Lead-Acid Battery Charger (3/6/12 cells), Industrial Backup Power / UPS, e-Mobility / Light Electric Vehicle Chargers, Solar MPPT Battery Charger Subsystem, Portable Medical Cart / Equipment Charger, Telecom / Network Battery Backup.
Multi-Cell Li-Ion / LiFePO4 Battery Charger
The LTC4015EUHF#PBF is purpose-built for 2-cell to 9-cell Li-Ion and LiFePO4 packs up to 20 A. Its pin-selectable and I2C-adjustable chemistry algorithms implement the CC/CV profile and termination that Li-Ion cells require, while the synchronous buck topology keeps dissipation low at high charge current. A 4.2 V per-cell reference scales to a typical 8.4 V 2S pack or 37.8 V 9S pack from a 35 V VIN. According to the Analog Devices datasheet, the digital telemetry block exposes VIN, IIN, VBAT, IBAT, and die temperature over I2C, so a host MCU can log charge history without external ADCs. The DC2039A reference design shows a 2-cell Li-Ion, 8 A charger as a quick-start platform.
Recommandé
Lead-Acid Battery Charger (3/6/12 cells)
The LTC4015EUHF#PBF supports 3-cell, 6-cell, and 12-cell Lead-Acid stacks by reusing its multi-chemistry charge algorithm with Lead-Acid float voltages. Its 35 V input ceiling comfortably covers a 12-cell (24 V) or 6-cell (12 V) Lead-Acid pack at full float plus margin. Compared with linear Lead-Acid chargers, the synchronous buck stage cuts thermal dissipation in half or more, which is essential when charging from a 24 V bus into a 12 V stack. The on-chip safety timer and automatic recharge features protect Lead-Acid cells from overcharge and sulfation. According to the LTC4015 datasheet, programmable input current limit prevents tripping upstream breakers when sharing a bus with other loads.
Recommandé
Industrial Backup Power / UPS
Industrial backup power systems rely on always-ready Lead-Acid or Li-FePO4 packs that must accept float charge indefinitely. The LTC4015EUHF#PBF's automatic recharge and reverse-current blocking keep the battery topped without overcharging during long float periods, while its I2C telemetry allows remote monitoring of VBAT and IBAT over SMBus or PMBus gateways. Up to 20 A of charge current supports mid-sized UPS cabinets powering industrial controllers and security equipment. According to the datasheet, under-voltage lockout prevents deep discharge damage if the battery does fall below safe levels. A QFN-EP 5x7 mm footprint keeps the charger compact inside 1U rack-mount enclosures.
Recommandé
e-Mobility / Light Electric Vehicle Chargers
e-Bikes, e-scooters, and small electric utility vehicles use 7S to 13S Li-Ion packs with charge currents of 5 A to 20 A, which is exactly where the LTC4015EUHF#PBF operates. The synchronous buck architecture keeps the charger light and cool even when sourcing 20 A from a 36 V or 48 V input. The I2C telemetry reports pack current and voltage to the vehicle display or battery management unit for state-of-charge estimation. The 38-pin QFN-EP with low thermal resistance survives the harsh thermal environment inside a hub-mounted or frame-mounted charger box. According to the datasheet, the safety timer enforces a maximum charge duration, which prevents indefinite overcharge if the host MCU crashes.
Recommandé
Solar MPPT Battery Charger Subsystem
In solar installations, the LTC4015EUHF#PBF sits behind an upstream MPPT controller (such as LT8490 or LT8610) and provides the chemistry-specific battery charge profile with I2C telemetry for state-of-charge monitoring. The 35 V input range covers a typical 24 V solar panel open-circuit voltage with margin. Programmable input current limit protects the upstream MPPT stage from overload when the panel output exceeds the battery acceptance. Compared with discrete charger designs, the integrated digital telemetry eliminates extra A/D channels on the system MCU. According to the LTC4015 datasheet, the synchronous buck stage maintains >95% efficiency in typical solar charging conditions, preserving harvested energy.
Recommandé
Portable Medical Cart / Equipment Charger
Portable medical carts use Li-Ion or LiFePO4 packs with high charge currents to minimize downtime between shifts. The LTC4015EUHF#PBF charges 4S to 8S Li-FePO4 packs at up to 20 A, restoring a depleted cart battery during a lunch break rather than overnight. The I2C telemetry exposes VBAT, IBAT, and die temperature to a medical-grade host MCU for accurate runtime prediction. According to the datasheet, the LTC4015E operating junction temperature spec of 0C to 85C matches the controlled indoor thermal environment of clinical settings. Pb-free lead finish and 38-pin QFN-EP support the long product life cycles typical of medical devices.
Recommandé
Telecom / Network Battery Backup
Telecom base stations and remote network equipment use -48 V Lead-Acid or Li-Ion battery strings with central monitoring. The LTC4015EUHF#PBF can charge the lower-voltage battery string from a tapped-down 24 V or 36 V rail at up to 20 A while reporting battery health over I2C to the central site controller. Its automatic recharge and overvoltage protection prevent damage to long-string Lead-Acid packs during float conditions. According to the datasheet, the synchronous buck topology minimizes thermal stress in sealed outdoor enclosures with limited airflow. The QFN-EP package with exposed pad conducts heat directly to chassis-mounted copper for additional cooling.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LTC4015EUHF#PBF — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LTC4015IUHF#PBF | LTC4015EUHF#TRPBF | LTC4015IUHF#TRPBF | LTC4015EUHF |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 38-pin QFN-EP (5x7 mm) | 38-pin QFN-EP (5x7 mm) - same | 38-pin QFN-EP (5x7 mm) - same | 38-pin QFN-EP (5x7 mm) - same | 38-pin QFN-EP (5x7 mm) - same |
| Battery Chemistry | Li-Ion / LiFePO4 / Li-Poly / Lead-Acid | Li-Ion / LiFePO4 / Li-Poly / Lead-Acid - same | Li-Ion / LiFePO4 / Li-Poly / Lead-Acid - same | Li-Ion / LiFePO4 / Li-Poly / Lead-Acid - same | Li-Ion / LiFePO4 / Li-Poly / Lead-Acid - same |
| Maximum Input Voltage | 35 V | 35 V | 35 V | 35 V | 35 V |
| Maximum Charge Current | 20 A | 20 A | 20 A | 20 A | 20 A |
| Temperature Grade | E (0C to 85C spec, -40C to 125C by design) | I (-40C to 125C fully spec'd) | E (same as this part) | I (-40C to 125C fully spec'd) | E (same as this part) |
| Packaging Form | Tube / Tray (PBF) | Tube / Tray (PBF) | 7-inch Tape & Reel (TRPBF) | 7-inch Tape & Reel (TRPBF) | Non-Pb-free tube |
| I2C Telemetry | Yes (VIN, IIN, VBAT, IBAT, die temp, thermistor) | Yes - same | Yes - same | Yes - same | Yes - same |
| Lead-Free / RoHS | Yes (Pb-free PBF) | Yes | Yes | Yes | No (non-Pb-free) |
Principaux différenciateurs
- True multi-chemistry buck charger controller up to 20 A with on-chip I2C telemetry (vs LTC4009IUF-1#PBF)
- Wide 35 V input range covers 2-cell to 9-cell Li-Ion stacks from a 24 V or 36 V bus (vs LTC4015EUHF#TRPBF)
- Drop-in I-grade variant available for harsh environments (vs LTC4015EUHF#PBF)
Notes de conception
At 20 A synchronous buck charging into a 12 V battery from a 24 V input, the LTC4015EUHF#PBF's external MOSFETs and inductor dissipate significant power. The 38-pin QFN-EP must be soldered to a continuous ground copper pour of at least 1 square inch on the top layer, with thermal vias to inner ground planes, to keep junction temperature within the 125 C maximum. For continuous 20 A operation, size the copper pour per the Analog Devices QFN thermal layout application note.
Route the battery sense traces as a Kelvin connection directly to the current-sense resistor pads, not through the inductor or MOSFET switching loop. Keep the SW node traces short and wide to minimize ringing, and place the input ceramic capacitors within 5 mm of the VIN and PGND pins. According to the LTC4015 datasheet, improper input-capacitor placement can trigger false OVP trips or degrade input current-limit accuracy.
Do not omit the NTC thermistor network if the battery pack provides one - the LTC4015EUHF#PBF uses the NTC input to suspend charging on overtemperature conditions. Ensure the I2C pull-up resistors are sized for the bus capacitance (typically 2.2 kohm to 4.7 kohm at 100 kHz, 1 kohm at 400 kHz). Avoid leaving the EN pin floating; tie it high with a 100 kohm pull-up so the charger does not enter an undefined state on power-up.
The I2C bus on the LTC4015EUHF#PBF carries telemetry that drives host-MCU state-of-charge estimation, so bus integrity matters. Place 100 ohm series resistors near the SDA/SCL pins if the bus runs longer than 50 mm, and add a small ferrite bead on VCC near the part if EMI is a concern. According to Analog Devices application notes, isolating the analog ground of the LTC4015EUHF from the noisy digital ground of the host MCU through a star-point connection prevents ground loops from corrupting the IBAT telemetry.
Informations de conformité
PBF suffix denotes Pb-free lead finish per Analog Devices ordering guide. Not AEC-Q100 qualified - choose AEC-Q100-qualified alternatives for automotive. REACH and halogen-free status not stated in the verified web data.
