LTC4162EUFD-L42M - 35V/3.2A Multi-Cell Li-Ion Charger | ADI
Référence : LTC4162EUFD-L42M ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $11.2 | $11,20 |
| 10 | $10.05 | $100,50 |
| 100 | $8.95 | $895,00 |
| 500 | $8.05 | $4 025,00 |
| 1 000 | $7.2 | $7 200,00 |
LTC4162EUFD-L42M Présentation
A Lithium-Ion/Polymer switching charger is a power management IC that uses a high-frequency buck converter topology to efficiently step a higher DC input voltage down to the precise cell voltage required by a rechargeable battery. Such chargers sit in the broader hierarchy of battery management ICs and power management semiconductors, and they combine power conversion, charge termination, and PowerPath orchestration - decoupling system load from the battery so that a portable product can start up even when the battery is deeply discharged.
Key features of the LTC4162EUFD-L42M include input voltage regulation with Maximum Power Point Tracking (MPPT), a telemetry-rich I2C/SMBus interface for reporting current, voltage, and temperature, programmable charge voltage (the M suffix selects the 4.2 V per-cell Li-Ion chemistry profile), and integrated N-channel MOSFETs for synchronous rectification. The 28-lead 4x5 mm QFN package has an exposed pad for low thermal resistance.
Architecturally, the device uses constant-current/constant-voltage (CC/CV) charge control with a precision reference, on-chip current sensing, and a synchronous buck power stage. The integrated PowerPath controller allows the system load to be powered simultaneously from the input source and the battery without a host MCU, which simplifies hot-swapping and cold-start scenarios.
Typical applications include handheld industrial instruments, medical carts, e-bike and e-mobility chargers, solar-powered remote sensors, portable medical devices, and 1S-8S Li-Ion battery packs requiring high-efficiency charging. The wide input range also makes it well suited to 12 V/24 V vehicle and bus power systems. The M variant's 4.2 V/cell profile targets consumer-grade Lithium-Ion and Lithium-Polymer cells rather than LiFePO4 (LFP), which requires a 3.6 V/cell profile.
When designing with this part, ensure adequate copper area under the exposed thermal pad - the device can dissipate several watts at full charge current with a high input-to-battery voltage differential. MPPT requires configuring the input regulation voltage to match the source characteristic; consult the Analog Devices LTC4162-L datasheet for I2C register map and configuration sequence.
This page synthesizes distributor pricing, drop-in LTC4162-L family alternatives, and practical PowerPath design notes not consolidated in the manufacturer datasheet.
Alternatives de remplacement direct pour LTC4162EUFD-L42M — 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 LTC4162EUFD-L42M (même facteur de forme et même empreinte) — différant par Battery Chemistry, Function, Input Voltage Range, Number of Cells Supported, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LTC4162EUFD-L42#PBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC4162EUFD-L41#PBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC4162EUFD-LAD#PBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC4162EUFD-L42
✅ Remplacement direct✓ En stock
$8.75 / unité
Voir la fiche technique →LTC4162IUFD-L42#PBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC4162EUFD-L41#TRPBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC4162EUFD-L42M Spécifications
| Fonction | Synchronous step-down battery charger with PowerPath manager |
| Battery Chemistry | Lithium-Ion / Lithium-Polymer (4.2 V per cell) |
| Number of Cells Supported | 1 to 8 cells in series |
| Plage de tension d'entrée | Up to 35 V |
| Maximum Charge Current | 3.2 A |
| Topologie | Synchronous buck (step-down) with integrated MOSFETs |
| Charge Profile | Constant-Current / Constant-Voltage (CC/CV) |
| PowerPath Management | Yes - decouples load from battery |
| MPPT (Input Voltage Regulation) | Yes - for solar/turbulent source applications |
| Telemetry Interface | I2C / SMBus |
| Boîtier | 28-pin QFN (UFD) 4 mm x 5 mm x 0.75 mm |
| Température de fonctionnement | -40C to +125C |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant (PBF suffix) |
Configuration des broches de LTC4162EUFD-L42M
| Broche 1 | IN — Input supply voltage (up to 35 V) |
| Broche 2 | IN — Input supply voltage (up to 35 V) |
| Broche 3 | SW — Switch node of the synchronous buck |
| Broche 4 | SW — Switch node of the synchronous buck |
| Broche 5 | SW — Switch node of the synchronous buck |
| Broche 6 | SW — Switch node of the synchronous buck |
| Broche 7 | BST — Bootstrap for high-side gate drive |
| Broche 8 | VCC — Internal 5V LDO output (decouple with 1uF) |
| Broche 9 | SDA — I2C data |
| Broche 10 | SCL — I2C clock |
| Broche 11 | ALERT — SMBus alert output (open-drain) |
| Broche 12 | ACPR — AC adapter present indicator |
| Broche 13 | PROG — Charge current programming pin |
| Broche 14 | ITERM — Charge termination current programming |
| Broche 15 | TIMER — Charge timer capacitor |
| Broche 16 | THM — Thermistor input for battery temperature sensing |
| Broche 17 | BAT — Battery sense connection |
| Broche 18 | BAT — Battery sense connection |
| Broche 19 | SYS — System output / PowerPath output |
| Broche 20 | SYS — System output / PowerPath output |
| Broche 21 | SYS — System output / PowerPath output |
| Broche 22 | MPPT — Input voltage regulation (MPPT) programming |
| Broche 23 | GND — Ground |
| Broche 24 | GND — Ground |
| Broche 25 | GND — Ground |
| Broche 26 | GND — Ground |
| Broche 27 | NC — Not connected (per datasheet) |
| Broche 28 | NC — Not connected (per datasheet) |
Applications typiques
LTC4162EUFD-L42M convient pour 6 applications: Handheld Industrial Instruments, Solar-Powered Remote Sensors, Portable Medical Devices, E-Bike and E-Mobility Chargers, 12 V / 24 V Vehicle and Bus Power Systems, Multi-Cell Battery Packs with Telemetry.
Handheld Industrial Instruments
The LTC4162EUFD-L42M fits handheld industrial instruments because its 3.2 A synchronous buck charger and integrated PowerPath manager let a 1S-4S Li-Ion pack deliver full system load while charging. Its 35 V input tolerates wide 12-24 V industrial bus swings without input protection. I2C telemetry exposes battery current, voltage, and temperature to the host MCU so the device can log state-of-health, predict runtime, and enforce low-battery shutdown. Compared with linear chargers, the synchronous buck topology delivers 90%+ efficiency, reducing heat in sealed IP65 enclosures. The 4.2 V/cell M-suffix profile matches the Li-Po packs typically used in test meters, barcode scanners, and rugged tablets that run for full shifts on a single charge cycle.
Recommandé
Solar-Powered Remote Sensors
For solar-powered remote sensor nodes, the LTC4162EUFD-L42M's integrated Maximum Power Point Tracking (MPPT) input regulation holds the panel at its peak-power voltage as irradiance changes through the day, maximizing energy harvest. The 35 V input range accepts 12 V or 24 V panels with significant safety margin, and the 3.2 A charge current allows faster recharge of depleted packs after cloudy periods. The PowerPath controller keeps the sensor node alive on solar power while simultaneously topping the battery, eliminating brownouts during transient loads. The I2C telemetry interface allows low-duty-cycle MCUs to log solar energy harvested, battery state-of-charge, and panel voltage for remote diagnostics - critical for unattended field deployments.
Recommandé
Portable Medical Devices
The LTC4162EUFD-L42M suits portable medical devices because its monolithic synchronous charger reduces the discrete component count on the power board, supporting compact form factors required by handheld diagnostics, infusion pumps, and patient monitors. The 4.2 V/cell Li-Po charge profile (M suffix) matches the medical-grade Li-Po packs used in these applications. Integrated PowerPath eliminates host-MCU involvement in source-switching decisions, reducing firmware burden and improving reliability for safety-critical devices. The I2C telemetry exposes accurate battery state-of-charge and temperature data, allowing the device to warn clinicians before shutdown during patient care. Wide input range simplifies integration with both medical-grade AC adapters and USB-PD sources via a downstream Type-C controller.
Recommandé
E-Bike and E-Mobility Chargers
E-bike and light e-mobility chargers benefit from the LTC4162EUFD-L42M's ability to charge 1S-8S Lithium-Ion packs at up to 3.2 A. Higher cell counts (4S-8S) match the 36 V / 48 V nominal packs used in e-bikes and e-scooters, while the synchronous buck topology delivers 90%+ charging efficiency - critical for keeping adapter and charger housing temperatures low in enclosed designs. The 35 V input range accepts standard 24 V or 42 V adapter outputs with margin. I2C telemetry enables charger status indicators and battery health logging, while the PowerPath feature keeps auxiliary systems (lights, displays) powered during charging without a separate OR-ing circuit.
Recommandé
12 V / 24 V Vehicle and Bus Power Systems
In 12 V/24 V vehicle and bus power systems, the LTC4162EUFD-L42M's 35 V input range tolerates load-dump transients (which can exceed 40 V on 24 V systems) when paired with a simple TVS clamp. The IC can charge backup Li-Ion packs that keep telematics, GPS trackers, and fleet-management systems alive during cranking transients and engine-off periods. PowerPath management lets the system continue running from the alternator while the backup pack recharges, and the I2C telemetry provides battery state-of-health data for fleet dashboards. The 28-pin QFN package fits in space-constrained under-dash or behind-seat enclosures.
Recommandé
Multi-Cell Battery Packs with Telemetry
For multi-cell battery packs requiring built-in telemetry, the LTC4162EUFD-L42M combines the charger, PowerPath controller, and I2C reporting in a single 28-pin QFN. Battery-pack manufacturers can integrate the IC directly on the pack PCB, exposing current, temperature, and charge state over SMBus - compatible with the Smart Battery System (SBS) interface used in laptop and power-tool packs. The 1S-8S flexibility lets the same IC family serve packs from compact 1S consumer devices up to 8S power-tool packs. The exposed thermal pad and 4x5 mm QFN footprint ease PCB layout, while internal synchronous MOSFETs reduce BOM cost and shrink the pack's protection/charging board by 30-50% versus discrete solutions.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LTC4162EUFD-L42M — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LTC4162EUFD-L42#PBF | LTC4162EUFD-L41#PBF | LTC4162EUFD-LAD#PBF | LTC4162EUFD-L42 | LTC4162IUFD-L42#PBF | LTC4162EUFD-L41#TRPBF |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-pin QFN (UFD) 4x5 mm | 28-pin QFN (UFD) 4x5 mm - same | 28-pin QFN (UFD) 4x5 mm - same | 28-pin QFN (UFD) 4x5 mm - same | 28-pin QFN (UFD) 4x5 mm - same | 28-pin QFN (UFD) 4x5 mm - same | 28-pin QFN (UFD) 4x5 mm - same |
| Charge Voltage per Cell | 4.2 V (Li-Ion/Li-Po, M suffix) | 4.2 V | 4.1 V | 3.6 V (LiFePO4) | 4.2 V | 4.2 V | 4.1 V |
| Maximum Input Voltage | 35 V | 35 V | 35 V | 35 V | 35 V | 35 V | 35 V |
| Maximum Charge Current | 3.2 A | 3.2 A | 3.2 A | 3.2 A | 3.2 A | 3.2 A | 3.2 A |
| Operating Temperature | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) |
| MPPT (Input Regulation) | Yes (factory-tuned defaults) | Yes | Yes | Yes | Yes (untrimmed defaults) | Yes | Yes |
| Packaging Form | Tray / cut-tape | Tray | Tray | Tray | Tray | Tray | Tape & Reel |
Principaux différenciateurs
- Factory-tuned MPPT and telemetry defaults (vs LTC4162EUFD-L42#PBF)
- 4.2 V/cell profile matches standard Li-Ion/Li-Po chemistries (vs LTC4162EUFD-LAD#PBF)
- Extended -40C to +125C operating range (vs LTC4162IUFD-L42#PBF)
- Integrated PowerPath eliminates external OR-ing circuit (vs Discrete BQ25633-class charging solutions)
Notes de conception
Estimated: at VIN=20 V, VBAT=12 V (4S Li-Ion), and 2 A charge current, power dissipation is approximately (20-12) V x 2 A = 16 W in the synchronous switch path. The 28-pin 4x5 mm QFN (UFD) package has a low thermal resistance to the exposed pad, but at this dissipation level the layout must spread heat through a continuous ground copper pour on the top layer with multiple thermal vias under the exposed pad to inner layers. Without adequate copper, junction temperature can exceed 125C and trigger thermal shutdown. Reference the LTC4162-L datasheet PCB Layout Guidelines section for via pattern recommendations.
Place the input bulk capacitor (22-47 uF) and the input bypass capacitor (1 uF ceramic) as close as possible to the IN pins and GND. Route the SW (switch node) traces with a minimal-area loop to reduce EMI; use a ground-shielded trace or route on an inner layer surrounded by ground. The exposed thermal pad must be soldered to a copper pad with at least 9 thermal vias (0.3 mm drill, 1 mm pitch) connecting to the inner ground plane. The I2C pull-ups should be located near the LTC4162EUFD-L42M, not at the host MCU end, to ensure clean SMBus signaling.
Do not exceed 35 V on IN - even brief transients above this rating will damage the IC. Add a 36 V or higher transient voltage suppressor (TVS) upstream if the source can produce load-dump spikes (12 V/24 V vehicle systems). Do not omit the THM thermistor network on battery packs that include temperature sensing - without it, the charger cannot enforce the JEITA temperature window and may charge outside the safe temperature range. Do not confuse the L42M (4.2 V Li-Ion/Li-Po) variant with the LAD (3.6 V LiFePO4) variant when substituting - a wrong chemistry profile will overcharge LiFePO4 cells.
I2C/SMBus traces to SDA, SCL, and ALERT should be kept short (under 50 mm) and routed away from the SW node traces to avoid capacitive coupling of switching noise into the data lines. If the host board has noisy digital signals, add a small RC filter (100 ohm + 100 pF) on the SDA and SCL pins near the LTC4162EUFD-L42M. The ALERT pin is open-drain and requires a pull-up (typically 10 kohm to VCC).
Informations de conformité
RoHS compliant per PBF suffix. Halogen-free status not stated in verified web data. Not AEC-Q100 qualified - choose a different part for automotive applications.
