LTC4100EG#TRPBF - Smart Battery Charger Controller, 24-SSOP | Analog Devices
MPN: LTC4100EG#TRPBF ✓ Hoạt độngLTC4100EG#TRPBF Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho LTC4100EG#TRPBF — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LTC4100EG#TRPBF (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Battery Chemistry, Charger Topology, Interface, Maximum Charge Current.
LTC4100EG#PBF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC4100EG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC4101EG#PBF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC4011EG#PBF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC4015EG#PBF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC4100EG#TRPBF Thông số kỹ thuật
| Chức năng | 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) |
| Giao diện | SMBus (SBS Level 2 compliant) |
| SafetySignal Monitoring | Yes (temperature, ID, connectivity) |
| Nhiệt độ hoạt động | -40 °C to +85 °C |
| Hộp / Vỏ | 24-SSOP (0.209 in / 5.30 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Input Current Limiting | Programmable |
| Charger Topology | Switching controller driving external P-channel MOSFET/PNP |
| Trạng thái RoHS | Compliant |
| Lead-Free / Pb-Free | Yes (PBF suffix) |
Cấu hình chân LTC4100EG#TRPBF
| Chân 1 | DCIN — Adapter/DC input supply, 3.5 V to 26 V |
| Chân 2 | CLPROG — Input current limit programming |
| Chân 3 | SCL — SMBus clock input |
| Chân 4 | SDA — SMBus data I/O |
| Chân 5 | VCC — Internal 5 V regulator output |
| Chân 6 | GND — Ground |
| Chân 7 | BAT — Battery sense input |
| Chân 8 | SENSE — Charge current sense (Kelvin to Rsense) |
| Chân 9 | PROG — Charge current programming |
| Chân 10 | CHRG — Charge status output |
| Chân 11 | ACPR — AC adapter present indicator |
| Chân 12 | GATE — P-channel MOSFET gate drive |
| Chân 13 | SHDN — Shutdown / control input |
| Chân 14 | THERM — Thermistor sense / SafetySignal bias |
| Chân 15 | NC — Not connected (per datasheet) |
| Chân 16 | NC — Not connected (per datasheet) |
| Chân 17 | NC — Not connected (per datasheet) |
| Chân 18 | NC — Not connected (per datasheet) |
| Chân 19 | VOUT — Charger output to battery |
| Chân 20 | NC — Not connected (per datasheet) |
| Chân 21 | NC — Not connected (per datasheet) |
| Chân 22 | NC — Not connected (per datasheet) |
| Chân 23 | NC — Not connected (per datasheet) |
| Chân 24 | EP — Exposed pad / thermal pad (GND) |
Ứng dụng tiêu biểu
LTC4100EG#TRPBF phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC4100EG#TRPBF — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- True SBS Level 2 compliance with hardware SafetySignal decoding (vsLTC4011EG#PBF)
- Highest charge current in the LTC4100/LTC401x SSOP-24 family (vsLTC4101EG#PBF)
- Smaller PCB footprint than BGA smart charger solutions (vsBQ24735 (Texas Instruments))
- Wide 3.5 V to 26 V DCIN range covers both 12 V industrial and 19 V to 20 V laptop adapters (vsLTC4015EG#PBF)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
