LTC4162EUFD-FAD#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
The LTC4162EUFD-FAD is a 35 V, 3.2 A multi-cell LiFePO4 step-down battery charger with integrated PowerPath control and I2C telemetry in a 28-pin QFN package. It features programmable charge current, input voltage regulation, and real-time monitoring of voltage, current, and temperature via I2C. Available from stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- LTC4162EUFD-FAD#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.4600(MOQ 1)
- Temp Range
- ?°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Up to 3.2 A programmable charge current with 35 V input voltage rating supports multi-cell LiFePO4 packs in portable and industrial systems
- Integrated PowerPath control allows seamless transition between input power and battery, preventing supply interruption during charge
- Full I2C telemetry reports real-time battery voltage, charge current, input voltage, and die temperature for system health monitoring
- Adjustable charge termination threshold and input current limit simplify compliance with LiFePO4 cell specifications
- 28-pin QFN package with exposed paddle minimizes board area while aiding thermal dissipation at high charge currents
Applications
The LTC4162EUFD-FAD is designed for multi-cell LiFePO4 battery charging in industrial handheld instruments, portable medical devices, and autonomous field equipment powered by solar or DC adapters up to 35 V. Its PowerPath architecture ensures uninterrupted system operation while simultaneously charging the battery pack, critical for always-on applications. The I2C telemetry interface enables host-side battery state-of-charge monitoring and adaptive charge management in smart battery systems.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1866 |
| Date Of Intro | 2018-05-30 |
| YTEOL | 10 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | R-PQCC-N28 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max (Vsup) | 35V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 18V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | OTHER |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the LTC4162EUFD-FAD's PowerPath feature maintain system power during battery charging?
The LTC4162EUFD-FAD's PowerPath control automatically routes input power to the system load while simultaneously delivering up to 3.2 A to the LiFePO4 battery pack. If the input current limit of the adapter is reached, the IC reduces charge current dynamically to prioritize the load. This prevents brownouts during peak demand at input voltages up to 35 V, which is essential for industrial handhelds and medical monitors that must remain operational during charging cycles.
What telemetry data is accessible over I2C from the LTC4162EUFD-FAD, and how is it used in smart battery designs?
The LTC4162EUFD-FAD reports real-time battery voltage, charge current, input voltage, and die temperature through its I2C interface. A host microcontroller can read these values to compute state-of-charge, detect cell imbalance, or throttle charge current based on thermal limits. This eliminates the need for external ADCs and sense circuits, reducing BOM by 4 or more components in LiFePO4 pack charger designs targeting 12 V to 24 V battery configurations.
For a solar-powered field instrument, how does the LTC4162EUFD-FAD handle variable input voltage from a panel?
The LTC4162EUFD-FAD includes input voltage regulation that limits the panel operating point, functioning as a maximum power point tracking assist when the solar panel voltage drops under heavy current draw. With a 35 V input rating and adjustable input current limit, it accommodates 18 V to 30 V panel outputs typical of portable solar arrays, maintaining stable 3.2 A charge rates when irradiance is adequate while gracefully reducing current as panel voltage drops.
How does the LTC4162EUFD-FAD compare to a standard linear LiFePO4 charger in efficiency and thermal performance?
As a step-down (buck) charger rather than a linear device, the LTC4162EUFD-FAD converts excess input-to-battery voltage difference into charge current efficiently, with conversion efficiency typically above 90% at 3.2 A. A linear charger dissipates the full voltage differential as heat, producing watts of waste power at high charge rates. The 28-pin QFN package with exposed thermal paddle handles the reduced dissipation in the LTC4162EUFD-FAD, enabling operation across the -40°C to +85°C range without a heat sink.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| 19+ | $4.5900 | $87.21 |
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