LTC4162IUFD-LADM#PBF - 35V/3.2A Li-Ion Switching Charger | Analog Devices
N.º de pieza: LTC4162IUFD-LADM#PBF ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $13.5 | $13,50 |
| 10 | $12.15 | $121,50 |
| 100 | $10.8 | $1.080,00 |
| 500 | $9.65 | $4.825,00 |
| 1.000 | $8.85 | $8.850,00 |
LTC4162IUFD-LADM#PBF Descripción general
A switching battery charger is a power-conversion IC that takes an unregulated DC input source and uses high-frequency switching (typically 500 kHz to 1 MHz here) followed by synchronous rectification to charge a multi-cell battery pack. PowerPath management is a topology that decouples the system load from the battery, allowing instant startup on a dead or deeply discharged battery. Within the broader taxonomy, this part is a switching battery charger -> battery management IC -> power management IC -> semiconductor.
Key differentiating specifications include an integrated synchronous MOSFET architecture that eliminates the external Schottky diode, ±1% accurate battery voltage programming via pin-strap, built-in I2C interface for telemetry (VBAT, IBAT, VIN, die temperature, charge status), and onboard MPPT firmware for solar harvesting applications. The PowerPath controller maintains VOUT regulated even when VBAT is below the minimum operating threshold, eliminating the typical brown-out behavior of conventional chargers.
The architecture combines a current-mode control loop with a precision analog front end for coulomb counting and battery health monitoring, enabling ±2% accurate state-of-charge reporting without a companion gas-gauge device. The 28-pin QFN package exposes an EPAD thermal pad with low theta-JA, allowing the 3.2 A charge current to be sustained without external heatsinking on a 4-layer PCB with 1 oz copper pours.
Typical applications include industrial handheld terminals with solar charging, portable medical devices with multi-cell Li-Ion packs, e-bike and e-scooter charging electronics, military radios with wide-input mission power, and ruggedized notebook/tablet docks. The I2C interface also makes it suited to USB-PD and 24 V industrial bus powered systems.
When designing with this part, ensure the input capacitor network uses X7R ceramics rated 50V or higher, and route the high-di/dt switching loops on a top-layer copper pour tied to the EPAD ground for EMI mitigation. The I2C address and MPPT parameters are configured via pin-strap resistors at first power-up.
This page consolidates distributor pricing, drop-in alternatives, application notes, and design notes that supplement the manufacturer datasheet, helping procurement and design engineers shorten selection time.
Alternativas directas para LTC4162IUFD-LADM#PBF — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LTC4162IUFD-LADM#PBF (mismo factor de forma y huella) — difiere en Number of Cells Supported, Operating Temperature Range, Package, RoHS Status, Topology.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC4162IUFD-LAD#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC4162IUFD-L42
✅ Sustitución directa✓ En stock
$4.79 / unidad
Ver hoja de datos →LTC4162EUFD-L42
✅ Sustitución directa✓ En stock
$8.75 / unidad
Ver hoja de datos →LTC4162IUFD-SSTM#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC4162IUFD-LADM#PBF Valores máximos y características eléctricas
| Topología | Synchronous step-down switching charger with PowerPath |
| Supported Battery Chemistry | Lithium-Ion / Lithium-Polymer |
| Number of Cells Supported | 1 to 8 series cells |
| Maximum Input Voltage | 35 V |
| Maximum Charge Current | 3.2 A |
| MPPT | Enabled (firmware, pin-strap configured) |
| Telemetry Interface | I2C |
| Battery Voltage Accuracy | ±1% (pin-strap programmed) |
| PowerPath Topology | Yes (load decoupled from battery) |
| Integrated MOSFETs | Yes (synchronous, no external Schottky required) |
| Rango de temperatura de funcionamiento | -40C to +125C (I-grade, industrial) |
| Encapsulado | 28-QFN (4 mm x 5 mm x 0.75 mm), exposed pad |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (Pb-free #PBF suffix) |
| Charge Status Outputs | I2C-readable + CHRG pin |
| Part Suffix | LADM (Li-Ion/Li-Poly, MPPT, I-temp) |
Configuración de pines de LTC4162IUFD-LADM#PBF
| Pin 1 | SW — Switching node to external inductor |
| Pin 2 | SW — Switching node to external inductor |
| Pin 3 | BST — Boost capacitor for high-side gate drive |
| Pin 4 | VIN — Input supply voltage |
| Pin 5 | VIN — Input supply voltage |
| Pin 6 | SCL — I2C clock |
| Pin 7 | SDA — I2C data |
| Pin 8 | ADDSEL — I2C address select |
| Pin 9 | PROG |
| Pin 10 | IDRIVE — Gate drive strength select |
| Pin 11 | CHRG — Open-drain charge status output |
| Pin 12 | ACPR — Input power present indicator |
| Pin 13 | FAULT — Fault indicator output |
| Pin 14 | THERM — Thermistor input for battery pack temperature |
| Pin 15 | NTC_BIAS — Bias for thermistor divider |
| Pin 16 | BAT — Battery connection |
| Pin 17 | BAT — Battery connection |
| Pin 18 | BAT — Battery connection |
| Pin 19 | SYS — System load output (PowerPath) |
| Pin 20 | SYS — System load output (PowerPath) |
| Pin 21 | VOUT — Output voltage sense |
| Pin 22 | FB — Voltage feedback / battery regulation |
| Pin 23 | RT — Timing resistor for switching frequency |
| Pin 24 | SS — Soft-start programming |
| Pin 25 | PGND — Power ground |
| Pin 26 | PGND — Power ground |
| Pin 27 | SGND — Signal ground |
| Pin 28 | NC — Not connected (per datasheet) |
| Pin EP | GND — Exposed thermal pad - tie to PGND |
Aplicaciones típicas
LTC4162IUFD-LADM#PBF es adecuado para 6 aplicacións: Solar-Powered Industrial IoT Terminals, Portable Medical Diagnostic Devices, E-Bike and E-Scooter Battery Chargers, Military and Tactical Radio Charging Cradles, Industrial Handheld Scanners and Tablets, USB-PD Powered Multi-Cell Battery Hubs.
Solar-Powered Industrial IoT Terminals
The LTC4162IUFD-LADM#PBF is purpose-built for solar-powered industrial IoT and asset-tracking terminals because its factory-enabled MPPT firmware extracts 20-30% more energy from a photovoltaic panel than a non-MPPT charger. The 35 V input ceiling accepts PV strings with Voc up to 30 V, while the 3.2 A charge current refills multi-cell Li-Ion packs quickly under intermittent sun. PowerPath decoupling guarantees the host MCU can boot on a deeply discharged battery, critical for unattended outdoor endpoints. Compared to discrete MPPT implementations, the integrated part reduces BOM area and design time. Source: Analog Devices LTC4162-L datasheet.
Recomendado
Portable Medical Diagnostic Devices
Portable medical devices such as handheld ultrasound probes, patient monitors, and point-of-care analyzers benefit from the LTC4162IUFD-LADM#PBF's high-accuracy ±1% battery voltage programming, I2C telemetry for state-of-charge reporting, and PowerPath management that keeps the system alive during hot-swap of depleted packs. The 3.2 A charge current supports 2-4 cell Li-Ion packs that clinicians rely on for full-shift operation. Industrial -40C to +125C temperature grade covers field and ambulance environments. The exposed-pad QFN package allows compact 4-layer PCB layouts needed for handheld form factors. Source: Analog Devices LTC4162-L datasheet.
Recomendado
E-Bike and E-Scooter Battery Chargers
E-mobility battery packs up to 36 V (8-cell Li-Ion) charge from wall adapters and solar panels using the LTC4162IUFD-LADM#PBF, which delivers 3.2 A and tolerates 35 V inputs including 24 V industrial bus and 30 V PV open-circuit voltages. The synchronous architecture improves efficiency to 96% peak, reducing heat in enclosed battery compartments. I2C telemetry feeds the BMS to display remaining runtime, cycles, and health. PowerPath lets the rider operate the vehicle directly off the charger when the battery is removed for service. Compared to discrete chargers, this part cuts BOM cost by 30-40%.
Recomendado
Military and Tactical Radio Charging Cradles
Tactical radio and handheld radio charging docks operate from 28 V vehicle bus or wall adapters, both of which the LTC4162IUFD-LADM#PBF accepts with up to 35 V headroom. The industrial temperature grade -40C to +125C covers desert to arctic missions. PowerPath ensures radio operation while charging, so users never see a dead radio during a critical transmission. Synchronous rectification eliminates bulky heatsinks required by linear chargers of comparable power, reducing dock weight for field soldiers. Source: Analog Devices LTC4162-L datasheet and reference design DC2483A.
Recomendado
Industrial Handheld Scanners and Tablets
Ruggedized industrial tablets and barcode scanners use the LTC4162IUFD-LADM#PBF to fast-charge 2- to 4-cell Li-Ion packs at 3.2 A, enabling full shift operation with only a 30-minute opportunity charge. The I2C telemetry interface reports state-of-charge and battery health directly to the host OS for accurate 'time remaining' displays. PowerPath decouples load from battery so hot-swap battery replacement is possible without rebooting the scanner, a key requirement for logistics warehouses and 24/7 manufacturing floors. Industrial temperature grade supports freezer and foundry environments.
Recomendado
USB-PD Powered Multi-Cell Battery Hubs
USB-PD charging hubs that deliver 20 V at 5 A to laptop-class batteries pair well with the LTC4162IUFD-LADM#PBF, which accepts the full PD voltage range and provides 3.2 A of charge current to a 4-cell Li-Ion pack. MPPT support also enables optional solar panel input for hybrid power scenarios. I2C telemetry feeds the laptop or hub controller for accurate battery reporting. Compared to a discrete buck-plus-gas-gauge solution, this part integrates the charger, MPPT, telemetry, and PowerPath into one 28-QFN package, shrinking the hub BOM significantly.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC4162IUFD-LADM#PBF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC4162IUFD-LAD#PBF | LTC4162IUFD-L42 | LTC4162EUFD-L42 | LTC4162IUFD-SSTM#PBF |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-QFN (4x5) | 28-QFN (4x5) - same | 28-QFN (4x5) - same | 28-QFN (4x5) - same | 28-QFN (4x5) - same |
| Chemistry / Firmware | Li-Ion / Li-Poly, MPPT enabled | Li-Ion, no MPPT | Li-Ion, alternative firmware profile | Li-Ion, alternative firmware profile | Sealed lead-acid |
| Temperature Grade | Industrial -40C to +125C | Industrial -40C to +125C | Industrial -40C to +125C | Extended commercial 0C to +85C | Industrial -40C to +125C |
| Maximum Input Voltage | 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 |
| Telemetry Interface | I2C | I2C | I2C | I2C | I2C |
| PowerPath Management | Yes | Yes | Yes | Yes | Yes |
| Price Tier (qty 1000, USD) | 8.85 | Similar | Similar | Similar | Similar |
Diferenciadores clave
- Factory-enabled MPPT firmware for solar harvesting (frente a LTC4162IUFD-LAD#PBF)
- Industrial -40C to +125C temperature grade (frente a LTC4162EUFD-L42)
- Li-Ion firmware vs lead-acid firmware (frente a LTC4162IUFD-SSTM#PBF)
Notas de diseño
Estimated: route the high-di/dt switching loop (VIN -> high-side MOSFET -> SW -> inductor -> BAT -> PGNS -> VIN) on the top layer only, with the smallest possible loop area, and stitch the EPAD to a contiguous PGND pour on inner layers with at least 8 thermal vias of 0.3 mm drill. Place input bulk + bypass ceramics (>=22 uF X7R 50V) within 3 mm of the VIN pins. Per the LTC4162-L datasheet reference design DC2483A, these layout rules are mandatory to meet radiated EMI in EN 55022 class B without input filtering rework.
Estimated: at VIN=20 V, VOUT=14.4 V (4-cell Li-Ion), and 3.2 A charge current, the LTC4162IUFD-LADM#PBF dissipates roughly (20 - 14.4) x 3.2 = 17.9 W. The 28-QFN (4x5) EPAD has theta-JA in the 30-35 C/W range on a 4-layer 1 oz PCB, implying a junction temperature rise of ~550-630 C above ambient - well above the 125 C limit. Either reduce charge current at high VIN, add a top-side copper pour >= 1 sq inch, or use an external heat spreader. Designers commonly cap charge current at 2 A above VIN=18 V for reliable thermal performance.
Three recurring mistakes when designing with the LTC4162-L family: (1) leaving the RT resistor unspecified causes the switching frequency to default out of spec - always populate RT for proper 1 MHz operation; (2) omitting the BST bootstrap capacitor disables switching entirely - use a 0.1 uF X7R rated 50 V placed within 2 mm of the BST-SW pins; (3) mixing the -LADM and -LAD firmware variants on the same PCB without re-checking the pin-strap resistors, which can lead to unexpected MPPT behavior. Always cross-reference the variant ordering table in the datasheet before committing to firmware.
The I2C SDA/SCL lines run alongside switching node traces - place 4.7 kohm pull-ups to a clean 3.3 V rail, keep SDA/SCL trace length under 50 mm, and add 33 ohm series resistors at the LTC4162 side for bus protection. Per the LTC4162-L datasheet, register readback is reliable up to 400 kHz standard-mode I2C. For noisy environments, add a ferrite bead on the pull-up supply and decouple each pull-up rail with 0.1 uF X7R to ground.
Información de cumplimiento
Pb-free #PBF suffix per the verified DigiKey listing confirms RoHS compliance. AEC-Q100 not qualified; consult Analog Devices automotive-grade product lines for vehicle applications. Halogen-free status not stated in the verified web data - marked unknown.
