LTC4162IUFD-L42 - 35V/3.2A Multi-Cell Li-Ion Charger | Analog Devices
MPN: LTC4162IUFD-L42 ✓ فعالLTC4162IUFD-L42 نمای کلی
A switching battery charger (also called a switch-mode battery charger or buck charger IC) is a power management device that converts a higher DC input voltage to a lower, precisely regulated voltage/current suitable for safely charging a rechargeable cell stack. It belongs to the family of power management ICs (PMICs), specifically battery management PMICs, sitting between general DC-DC converters and dedicated battery fuel gauges in the functional hierarchy.
Key features include 4.5V to 35V input voltage range, factory-set 4.2V per-cell charge voltage with ±1% accuracy, programmable charge current up to 3.2A, integrated N-channel MOSFET synchronous PowerPath stage, and I2C/SMBus telemetry reporting input voltage, battery voltage, charge current, die temperature, and system voltage. The synchronous buck topology achieves charging efficiencies above 90 percent, while the 4mm x 5mm QFN-28 package keeps the solution footprint compact.
Typical applications include USB-C Power Delivery (PD) charging for 2-cell to 8-cell Li-ion battery packs in industrial handhelds, medical carts, power tools, e-bikes, portable solar backup systems, and uninterruptible DC supplies. Because it operates directly from 24V industrial rails, the LTC4162IUFD-L42 also suits building automation and telecom backup modules.
When designing with this device, place input/output ceramic capacitors close to the IC pins and keep the high-current loop area minimal to suppress EMI. The exposed pad must be soldered to a sufficient copper pour to keep junction temperature within ratings; an NTC thermistor or the internal die sensor can be used for JEITA-style thermal protection.
جایگزین‌های drop-in برای LTC4162IUFD-L42 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای LTC4162IUFD-L42 (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Number of Cells Supported, Operating Temperature Range, Package, RoHS Status, Topology.
LTC4162EUFD-L42
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←LTC4162IUFD-L42M#PBF
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC4162EUFD-L41
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC4162EUFD-L40
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC4162IUFD-F42
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC4162IUFD-L40
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC4162IUFD-L42 مشخصات
| عملکرد | Synchronous step-down switching battery charger with PowerPath manager |
| Cell Chemistry | Lithium-Ion / Lithium-Polymer |
| Number of Cells Supported | 1 to 8 cells |
| محدوده ولتاژ ورودی | 4.5 V to 35 V |
| Maximum Charge Current | 3.2 A |
| Factory Charge Voltage | 4.2 V per cell |
| Charge Voltage Accuracy | +/-1% (per Analog Devices datasheet) |
| توپولوژی | Synchronous buck (step-down) with integrated N-channel MOSFETs |
| PowerPath Control | Integrated, decouples system load from battery |
| Telemetry Interface | I2C / SMBus |
| بسته‌بندی | 28-pin QFN-EP (UFD), 4 mm x 5 mm x 0.75 mm |
| نوع نصب | Surface Mount |
| محدوده دمای کاری | -40 C to +125 C (I-grade) |
| وضعیت RoHS | Compliant |
| سطح MSL | 1 (per Analog Devices packaging information) |
پیکربندی پین LTC4162IUFD-L42
| پین 1 | VIN — Input supply to the switching charger (4.5 V to 35 V) |
| پین 2 | VIN — Input supply (parallel pin for high-current) |
| پین 3 | SCL — I2C serial clock input |
| پین 4 | SDA — I2C serial data input/output |
| پین 5 | ADR — I2C address select |
| پین 6 | INT — Interrupt output (open-drain, active low) |
| پین 7 | CHRG — Charge status output (open-drain) |
| پین 8 | GND — Analog ground |
| پین 9 | PROG — Charge current programming resistor |
| پین 10 | ILIM — Input current limit programming |
| پین 11 | NTC — Battery thermistor input |
| پین 12 | BAT — Battery connection sense |
| پین 13 | BAT — Battery connection (high-current) |
| پین 14 | SYS — System load output (PowerPath output) |
| پین 15 | SYS — System load output (parallel pin) |
| پین 16 | SW1 — Switch node 1 (buck high-side) |
| پین 17 | SW1 — Switch node 1 (parallel) |
| پین 18 | SW2 — Switch node 2 (buck low-side) |
| پین 19 | SW2 — Switch node 2 (parallel) |
| پین 20 | BST — Bootstrap capacitor for high-side gate drive |
| پین 21 | VC — Internal LDO bypass |
| پین 22 | VOUT — Charger output regulation |
| پین 23 | CLPROG — Current-limit programming |
| پین 24 | DTHM — Die temperature monitor output |
| پین 25 | ACPR — AC adapter present indicator |
| پین 26 | EN — Enable input (active high) |
| پین 27 | SUSP — Suspend input (low Iq mode) |
| پین 28 | EP — Exposed pad - thermal pad, must be soldered to ground plane |
کاربردهای معمول
LTC4162IUFD-L42 مناسب است برای 6 کاربردs: USB-C PD Charging for 2S-4S Li-Ion Power Tools, Industrial Handheld Computer Battery Management, Medical Cart and Portable Diagnostic Equipment, Solar-Powered IoT Gateway with Battery Backup, E-Bike and Light Electric Vehicle Battery Packs, Telecom 24V/48V Battery Backup Module.
USB-C PD Charging for 2S-4S Li-Ion Power Tools
The LTC4162IUFD-L42 fits USB-C PD charging for 2S-4S cordless power tools because its 4.5 V to 35 V input range directly accepts 5 V to 20 V PD source voltages without pre-regulation. The 3.2 A programmable charge current enables fast-charge of high-capacity 18650/21700 packs in under an hour, while integrated PowerPath control lets the tool run from the adapter even with a depleted battery. The 4mm x 5mm QFN-28 footprint occupies less than 100 mm2 of PCB area, leaving room for compact tool handles.
پیشنهادی
Industrial Handheld Computer Battery Management
For industrial handhelds running barcode scanners and RFID readers, the LTC4162IUFD-L42 provides reliable 2S to 4S Li-ion charging with its industrial -40 C to +125 C operating range. The I2C telemetry interface lets the host MCU log charge cycles for predictive maintenance, and the integrated thermal regulation prevents overheating during hot-swap operations. Synchronous buck topology delivers >90% charging efficiency, extending runtime between adapter insertions in warehouse environments.
پیشنهادی
Medical Cart and Portable Diagnostic Equipment
Medical carts and portable ultrasound/diagnostic devices require multi-cell Li-ion battery packs with certified charging safety. The LTC4162IUFD-L42 supports 4S to 6S packs (16.8 V to 25.2 V) with +/-1% factory voltage accuracy, ensuring consistent charge termination that protects cells from overcharge. The exposed-pad QFN-28 package allows direct PCB thermal management without heatsinks, and the I2C die-temperature telemetry enables JEITA-style thermal foldback for patient-safety-critical designs.
پیشنهادی
Solar-Powered IoT Gateway with Battery Backup
The LTC4162IUFD-L42's 35 V input range lets it charge 2S to 4S backup batteries directly from 12 V to 24 V solar panels with MPPT input filters, eliminating a separate buck stage. Integrated PowerPath control instantly switches the gateway load to the battery when solar input drops below threshold, ensuring continuous IoT connectivity. I2C telemetry enables cloud-based state-of-charge reporting, and the synchronous design minimizes quiescent loss for off-grid installations.
پیشنهادی
E-Bike and Light Electric Vehicle Battery Packs
E-bikes and personal mobility devices use 7S to 8S Li-ion packs (29.4 V to 33.6 V full charge). The LTC4162IUFD-L42 charges these packs directly from a 30 V to 35 V nominal charger source, while its 3.2 A current supports packs up to 10 Ah in roughly 3 hours. Industrial temperature rating tolerates outdoor summer/winter exposure, and the 28-pin QFN exposed pad spreads heat evenly across the controller PCB. Synchronous buck topology preserves charger efficiency above 90% at full load.
پیشنهادی
Telecom 24V/48V Battery Backup Module
For telecom backup modules operating from 24 V or 48 V rectified rails, the LTC4162IUFD-L42 charges 6S to 8S Li-ion backup batteries (25.2 V to 33.6 V) directly from the bus. The 35 V maximum input withstands 48 V rail transients per telecom surge standards, while the synchronous buck stage maintains high efficiency at typical telecom float voltages. I2C reporting lets the central office monitor backup state-of-charge over the existing management bus.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای LTC4162IUFD-L42 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | LTC4162EUFD-L42 | LTC4162IUFD-L42M#PBF | LTC4162EUFD-L41 | LTC4162EUFD-L40 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | QFN-28 (UFD) 4x5 mm | QFN-28 (UFD) 4x5 mm - same | QFN-28 (UFD) 4x5 mm - same | QFN-28 (UFD) 4x5 mm - same | QFN-28 (UFD) 4x5 mm - same |
| Input Voltage Range | 4.5 V to 35 V | 4.5 V to 35 V | 4.5 V to 35 V | 4.5 V to 35 V | 4.5 V to 35 V |
| Maximum Charge Current | 3.2 A | 3.2 A | 3.2 A | 3.2 A | 3.2 A |
| Factory Charge Voltage (per cell) | 4.2 V | 4.2 V | 4.2 V | 4.1 V | 4.0 V |
| Temperature Grade | Industrial (-40 C to +125 C) | Extended commercial (0 C to +85 C) | Military plastic flow | Extended commercial (0 C to +85 C) | Extended commercial (0 C to +85 C) |
| PowerPath Control | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) |
| I2C Telemetry | Yes | Yes | Yes | Yes | Yes |
تفاوت‌های کلیدی
- Integrated PowerPath eliminates external MOSFET load switch (در مقابلDiscrete buck charger with external load-sharing FETs)
- I2C telemetry reduces external fuel-gauge requirement (در مقابلExternal battery fuel gauge IC (e.g., LTC2943))
- 35 V absolute-max input withstands 24 V industrial surge (در مقابلLower-input competitors (e.g., 20 V max))
یادداشت‌های طراحی
Estimated: at VIN=20 V, VOUT=8.4 V (2S), 2 A charge current, the LTC4162IUFD-L42 dissipates roughly (20-8.4)*2 = 23.2 W. The QFN-28 (UFD) 4x5 mm package requires at least 1 square inch of top-layer copper pour tied to the exposed pad to keep junction rise below 50 C. For continuous 3.2 A charging in enclosed enclosures, add bottom-layer copper and thermal vias to spread heat to the inner planes.
Keep the high-current loop (VIN to SW1/SW2 to SYS/BAT and back to GND) area under 0.5 cm2 to suppress radiated EMI. Place input ceramic capacitors (typically 10 uF X7R) within 3 mm of the VIN pins and the exposed pad. Route the I2C SCL/SDA traces away from the SW node and use a ground guard on both sides to maintain signal integrity for telemetry reads.
Do not omit the bootstrap capacitor on BST - the high-side N-channel MOSFET requires it for gate drive above VIN. The NTC thermistor network must use a 10 kohm B-curve (3950) device referenced to the analog ground; wrong NTC values cause premature charge termination. Finally, verify the I2C address pin ADR is tied to GND or VCC before firmware release - floating ADR can corrupt bus addressing on hot-plug events.
Program the input current limit via ILIM resistor to prevent tripping upstream USB-C or wall-adapter sources. For USB-C PD 5 V/3 A sources, set ILIM to 3 A; for standard 5 V/2.4 A adapters, set ILIM to 2.4 A. This prevents the adapter from collapsing its output during the inrush of a depleted battery, which would otherwise trigger the LTC4162IUFD-L42's ACPR flag and disable charging.
اطلاعات انطباق
RoHS and REACH compliant per Analog Devices product page. Not AEC-Q100 qualified - use AEC-Q100 grade ADI parts for automotive. Halogen-free and lead-free per ADI packaging information.
