LTC4100EG#TRPBF - Smart Battery Charger Controller, 24-SSOP | Analog Devices
Référence : LTC4100EG#TRPBF ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $12.37 | $12,37 |
| 10 | $11.5 | $115,00 |
| 100 | $10.2 | $1 020,00 |
| 500 | $8.95 | $4 475,00 |
| 1 000 | $7.85 | $7 850,00 |
LTC4100EG#TRPBF Présentation
A Smart Battery Charger Controller is a power management IC that arbitrates between a host system, a removable battery pack, and a DC input source to safely charge multi-cell Li-Ion, Li-Polymer, NiMH, or NiCd battery packs in compliance with the System Management Bus (SMBus) Smart Battery Specification. The device sits within the broader hierarchy: battery charger IC -> battery management -> power management IC -> semiconductor, and provides the digital intelligence and analog control loops that allow a portable product to deliver an SBS-compliant charging experience without a discrete microcontroller.
Key features of the LTC4100EG#TRPBF include Level 2 SBS compliance, programmable charge current up to 4 A, integrated SMBus interface for battery and host communication, SafetySignal monitoring for temperature, battery ID, and pack connectivity, programmable input current limiting, and support for 3- to 4-cell Li-Ion battery stacks. The 24-SSOP thermally-enhanced package provides sufficient copper area for up to 4 A continuous operation when paired with a properly laid-out PCB.
The LTC4100 architecture combines a precision current-sense amplifier, a switching controller, a digital SMBus slave, and battery-authentication logic on a single die. The SafetySignal input is decoded to identify battery chemistry, temperature, and connection integrity before charging is enabled, providing hardware-level safety redundancy that exceeds what host firmware alone can guarantee. The switching controller drives an external P-channel MOSFET or PNP pass element, allowing designers to optimize efficiency, cost, and thermal dissipation independently of the controller IC itself.
Typical applications for the LTC4100EG#TRPBF include laptop and notebook charging sub-systems, medical portable equipment, industrial test and measurement instruments, professional cordless power tools, and any SBS-compliant charging cradle where a host microcontroller must delegate charge management to a dedicated controller. The same device is widely used in 2-way radio battery chargers and ruggedized field equipment where the Smart Battery data set must be exchanged with an external host.
When designing with the LTC4100EG#TRPBF, the critical engineering consideration is MOSFET/PNP selection: choose a P-channel device with Vds rated at least 1.3 × the maximum DCIN, Rds(on) low enough to keep dissipation below the package thermal limit at full load, and a Vgs(th) compatible with the LTC4100's gate drive. Input current sense resistors must be 1 % tolerance or better to maintain SMBus-reported current accuracy within the SBS specification.
This page synthesizes distributor stock, drop-in SSOP-24 alternatives, and practical charger design notes not consolidated in the manufacturer datasheet, giving power and embedded engineers a single reference for evaluating the LTC4100EG#TRPBF against modern smart-battery charging solutions.
Alternatives de remplacement direct pour LTC4100EG#TRPBF — 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 LTC4100EG#TRPBF (même facteur de forme et même empreinte) — différant par Operating Temperature, Battery Chemistry, Charger Topology, Interface, Maximum Charge Current.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LTC4100EG#PBF
✅ Remplacement direct✓ En stock
$17.3894 / unité
Voir la fiche technique →LTC4100EG
✅ Remplacement direct✓ En stock
$8.35 / unité
Voir la fiche technique →LTC4101EG#PBF
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LTC4011EG#PBF
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LTC4015EG#PBF
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LTC4100EG#TRPBF Spécifications
| Fonction | Smart Battery Charger Controller |
| Battery Chemistry | Smart Batteries / Li-Ion / Li-Pol / NiMH / NiCd |
| Cell Count | 3 to 4 cells (Li-Ion) |
| Supply Voltage (DCIN) | 3.5 V to 26 V |
| Maximum Charge Current | 4 A (programmable) |
| Interface | SMBus (SBS Level 2 compliant) |
| SafetySignal Monitoring | Yes (temperature, ID, connectivity) |
| Température de fonctionnement | -40 °C to +85 °C |
| Boîtier / Format | 24-SSOP (0.209 in / 5.30 mm body width) |
| Type de montage | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Input Current Limiting | Programmable |
| Charger Topology | Switching controller driving external P-channel MOSFET/PNP |
| Statut RoHS | Compliant |
| Lead-Free / Pb-Free | Yes (PBF suffix) |
Configuration des broches de LTC4100EG#TRPBF
| Broche 1 | DCIN — Adapter/DC input supply, 3.5 V to 26 V |
| Broche 2 | CLPROG — Input current limit programming |
| Broche 3 | SCL — SMBus clock input |
| Broche 4 | SDA — SMBus data I/O |
| Broche 5 | VCC — Internal 5 V regulator output |
| Broche 6 | GND — Ground |
| Broche 7 | BAT — Battery sense input |
| Broche 8 | SENSE — Charge current sense (Kelvin to Rsense) |
| Broche 9 | PROG — Charge current programming |
| Broche 10 | CHRG — Charge status output |
| Broche 11 | ACPR — AC adapter present indicator |
| Broche 12 | GATE — P-channel MOSFET gate drive |
| Broche 13 | SHDN — Shutdown / control input |
| Broche 14 | THERM — Thermistor sense / SafetySignal bias |
| Broche 15 | NC — Not connected (per datasheet) |
| Broche 16 | NC — Not connected (per datasheet) |
| Broche 17 | NC — Not connected (per datasheet) |
| Broche 18 | NC — Not connected (per datasheet) |
| Broche 19 | VOUT — Charger output to battery |
| Broche 20 | NC — Not connected (per datasheet) |
| Broche 21 | NC — Not connected (per datasheet) |
| Broche 22 | NC — Not connected (per datasheet) |
| Broche 23 | NC — Not connected (per datasheet) |
| Broche 24 | EP — Exposed pad / thermal pad (GND) |
Applications typiques
LTC4100EG#TRPBF convient pour 6 applications: Notebook and Laptop Smart Battery Charger, Medical Portable Equipment Charging Cradle, Professional Cordless Power Tool Charger, Industrial Test and Measurement Instrument, Two-Way Radio and Rugged Field Communication Battery Cradle, Mobile Robotics and AGV Charging Dock.
Notebook and Laptop Smart Battery Charger
The LTC4100EG#TRPBF is the canonical Analog Devices solution for 3- to 4-cell Li-Ion notebook charging sub-systems because it implements SBS Level 2 compliance and supports up to 4 A of programmable charge current from a 19 V adapter rail. In a typical implementation the controller sits between the DC barrel jack and the battery pack, arbitrating SMBus traffic between the embedded controller (EC) and the battery gauge. The 4 A ceiling comfortably drives 60 W+ charging while the 26 V DCIN rating survives 20 V adapters with overshoot. Compared to a discrete switching charger the LTC4100EG#TRPBF removes the need for a charger-side microcontroller and reduces firmware burden on the EC.
Recommandé
Medical Portable Equipment Charging Cradle
Portable patient monitors, infusion pumps, and handheld ultrasound probes use the LTC4100EG#TRPBF to charge 3- or 4-cell Li-Ion smart battery packs from a 12 V to 24 V medical-grade DC adapter. The SafetySignal input is critical here because it independently validates pack thermistor integrity before applying charge current, providing the hardware-level redundancy that IEC 60601-1 risk-management files expect. The 4 A programmable ceiling allows 30-minute to 60-minute charge windows for hot-swap workflows on nursing carts. The -40 °C to +85 °C operating range also supports storage in unheated hospital supply rooms.
Recommandé
Professional Cordless Power Tool Charger
20 V max cordless drills, impact drivers, and outdoor power tools rely on the LTC4100EG#TRPBF to deliver high-current charging of multi-cell Li-Ion packs while exchanging SBS battery health data with the tool's onboard microcontroller. The 4 A programmable current is appropriate for fast-charging 5 Ah packs in under 30 minutes, and the SMBus interface lets the tool firmware display remaining runtime, cell health, and cycle count on the operator-facing LCD. Ruggedized tools benefit from the -40 °C to +85 °C rating when chargers are deployed in unconditioned job-site trailers.
Recommandé
Industrial Test and Measurement Instrument
Bench-top oscilloscopes, portable spectrum analyzers, and field calibration instruments integrate the LTC4100EG#TRPBF to charge removable smart battery packs from 15 V to 20 V bench supplies. The SBS interface allows the instrument firmware to log battery state-of-health to internal non-volatile memory for ISO 17025 calibration records, while the SafetySignal monitoring prevents charge initiation on a pack with a damaged thermistor. Industrial-grade EMI performance and the wide DCIN tolerance make the LTC4100EG#TRPBF tolerant of noisy factory-floor DC rails.
Recommandé
Two-Way Radio and Rugged Field Communication Battery Cradle
Land-mobile-radio (LMR) handhelds, body-worn cameras, and tactical communication devices use the LTC4100EG#TRPBF in gang-charging cradles to refill multi-cell Li-Ion or Li-Polymer packs from a 12 V vehicle bus or a 19 V wall adapter. SBS Level 2 compliance means the same cradle works with multiple radio vendors' packs because the chemistry and required charge profile are read from the battery over SMBus. The 24-SSOP package is small enough for the slim-line mechanical envelope of a 6-pocket gang charger, and the -40 °C cold-start rating supports outdoor public-safety deployments.
Recommandé
Mobile Robotics and AGV Charging Dock
Autonomous mobile robots (AMRs), automated guided vehicles (AGVs), and warehouse fulfillment drones dock with a charging station built around the LTC4100EG#TRPBF to recharge high-capacity Li-Ion traction packs from a 24 V to 26 V industrial bus. SMBus communication allows the fleet-management software to schedule charge cycles, balance pack aging across the fleet, and remotely throttle charge current when the dock shares a circuit with other equipment. The 4 A charge ceiling is appropriate for opportunity-charging at 100 A to 200 A peak load handling when paired with a derated SenseFET.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LTC4100EG#TRPBF — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LTC4100EG#PBF | LTC4100EG | LTC4101EG#PBF | LTC4011EG#PBF | LTC4015EG#PBF |
|---|---|---|---|---|---|---|
| Package | 24-SSOP (5.30 mm) | 24-SSOP (5.30 mm) - same | 24-SSOP (5.30 mm) - same | 24-SSOP (5.30 mm) - same | 24-SSOP (5.30 mm) - same | 24-SSOP (5.30 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Maximum Charge Current | 4 A | 4 A | 4 A | 2 A | 3 A | 4 A |
| Battery Chemistry | Smart / Li-Ion / Li-Pol / NiMH / NiCd | Smart / Li-Ion / Li-Pol / NiMH / NiCd | Smart / Li-Ion / Li-Pol / NiMH / NiCd | Smart / Li-Ion / Li-Pol / NiMH / NiCd | NiMH / NiCd focus | Smart / Li-Ion / Li-Pol |
| DCIN Operating Range | 3.5 V to 26 V | 3.5 V to 26 V | 3.5 V to 26 V | 3.5 V to 26 V | 3.5 V to 26 V | 4.5 V to 28 V |
| SMBus / SBS Compliance | Level 2 | Level 2 | Level 2 | Level 2 | Level 2 | Level 2 + PowerPath |
| SafetySignal Monitoring | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| RoHS / Lead-Free | Yes (PBF) | Yes | Yes | Yes | Yes | Yes |
Principaux différenciateurs
- True SBS Level 2 compliance with hardware SafetySignal decoding (vs LTC4011EG#PBF)
- Highest charge current in the LTC4100/LTC401x SSOP-24 family (vs LTC4101EG#PBF)
- Smaller PCB footprint than BGA smart charger solutions (vs BQ24735 (Texas Instruments))
- Wide 3.5 V to 26 V DCIN range covers both 12 V industrial and 19 V to 20 V laptop adapters (vs LTC4015EG#PBF)
Notes de conception
Choose a P-channel MOSFET with Vds rating of at least 1.3 × the maximum DCIN (so ≥34 V for a 26 V adapter), Rds(on) ≤ 30 mΩ at Vgs = -4.5 V, and logic-level Vgs(th). For 4 A charging the conduction loss at full load is approximately I² × Rds(on) = 4² × 0.030 = 0.48 W, which a SOT-23 or PowerPAK package can dissipate without a heatsink. The LTC4100 datasheet evaluation kit DC512B uses the Si2309 as a reference.
Estimated: at 4 A charge current and a 5 V VDS drop across the P-FET, conduction dissipation in the external MOSFET is 4 × 5 = 20 W worst-case. The 24-SSOP controller itself dissipates roughly 0.5 W (logic plus gate drive), so its theta_JA of approximately 90 °C/W yields a 45 °C rise over ambient. Mount the SSOP-24 with a continuous ground copper pour under the exposed pad and stitch thermal vias to an inner plane to keep junction temperature below 125 °C.
Use a 4-layer stackup with a dedicated ground plane under the SSOP-24 to provide both thermal spreading and a low-impedance return for the switching gate-drive currents. Place the input bulk capacitor, sense resistor, and P-FET within 5 mm of the LTC4100EG#TRPBF pins to minimize parasitic inductance. The SCL and SDA SMBus traces must be routed away from the switching node by at least 3 mm, or shielded with a ground trace, to avoid coupling battery telemetry noise.
The SCL and SDA SMBus lines require 10 kΩ pull-ups to the LTC4100 VCC pin; pull-ups to a different rail violate the SMBus spec and cause false start conditions during hot-plug. Add 100 pF to 220 pF series resistors on SCL/SDA at the connector side for ESD protection; values above 470 pF will round off the SMBus edges and cause CRC errors above 100 kHz clock rates.
Do not omit the SafetySignal pull-up resistor; without it the LTC4100EG#TRPBF will detect a missing thermistor as a fault and refuse to charge. Do not exceed 26 V on DCIN even transiently - the abs-max rating is 28 V and a hot-plugged 24 V industrial supply can ring above 30 V without a TVS clamp. Do not substitute an N-channel MOSFET for the P-channel pass element because the LTC4100 gate driver pulls low-to-enable, which is incompatible with N-FET source-referenced switching.
Informations de conformité
RoHS and REACH compliance per manufacturer product page and #PBF suffix. AEC-Q100 not applicable (industrial/commercial grade part). Halogen-free and conflict-minerals declarations not confirmed from the provided web data; flagged as 'unknown' rather than assumed.
