LM3622AM-4.1 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LM3622AM-4.1 is a lithium-ion battery charger controller IC with a fixed 4.1 V charge-termination voltage operating from a 4.5 V to 24 V input. It uses combined current/voltage-mode control for precise charge regulation in an 8-pin SOIC package. Available from stock worldwide at competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- LM3622AM-4.1 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -20.0°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3622AM-4.1?
- Fixed 4.1 V charge-termination voltage optimized for single-cell Li-ion batteries without external precision resistors
- Wide input voltage range of 4.5 V to 24 V accommodating USB adapters, wall adapters, and automotive 12 V rails
- Combined current/voltage-mode control loop for accurate constant-current and constant-voltage charging phases
- Compact 8-pin SOIC package enabling space-efficient single-cell charger designs
- Minimal external component count reduces BOM and simplifies PCB layout for portable devices
What is LM3622AM-4.1 used for?
The LM3622AM-4.1 is designed for portable consumer electronics such as handheld scanners, Bluetooth headsets, and GPS receivers that require accurate single-cell Li-ion charging from a variety of input sources. Its wide 4.5 V to 24 V input range also makes it suitable for industrial handhelds and medical portable devices powered by wall adapters or vehicle 12 V supplies. The compact SOIC-8 footprint allows it to be integrated into space-constrained battery packs and IoT sensor nodes.
What are the specifications of LM3622AM-4.1?
| YTEOL | 0 |
| Additional Feature | SEATED HGT-NOM |
| Analog IC - Other Type | BATTERY CHARGE CONTROLLER |
| Control Mode | CURRENT/VOLTAGE-MODE |
| Input Voltage-Max | 24V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 5V |
| JESD-30 Code | R-PDSO-G8 |
| Number of Functions | 1 |
| Output Voltage-Nom | 4.1V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Surface Mount | YES |
| Switcher Configuration | SINGLE |
| Temperature Grade | OTHER |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM3622AM-4.1 datasheet?
LM3622AM-4.1 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3622AM-4.1?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What charge-termination voltage does the LM3622AM-4.1 set, and why is it lower than the more common 4.2 V standard?
The LM3622AM-4.1 terminates charging at exactly 4.1 V per cell, which is 100 mV below the 4.2 V full-charge threshold. Operating at 4.1 V extends cycle life by roughly 30–50% compared to full-charge termination, making it suitable for applications such as medical handhelds and ruggedized scanners where battery longevity over 500+ cycles is prioritized over maximizing single-charge capacity.
What input voltage range can the LM3622AM-4.1 accept, and which power sources are compatible?
The LM3622AM-4.1 accepts input voltages from 4.5 V to 24 V, making it directly compatible with USB 5 V ports, standard 9 V and 12 V wall adapters, and automotive 12 V rails. This wide range eliminates the need for a pre-regulator in most single-supply designs, reducing the total BOM by at least 2–4 passive components.
What package does LM3622AM-4.1 use, and how compact is it for a portable device design?
The device is packaged in an 8-pin SOIC (R-PDSO-G8) with a 3.9 mm × 4.9 mm body and 1.27 mm lead pitch. This small footprint fits easily alongside the battery connector and sense resistor on a 1 cm² PCB area, which is important for wearable devices, Bluetooth earbuds, and IoT sensor nodes with tight layout constraints.
How does the LM3622AM-4.1 implement current and voltage control during the charging cycle?
The LM3622AM-4.1 uses a combined current/voltage-mode control loop: in the constant-current phase it regulates charge current via an external sense resistor, and it automatically transitions to constant-voltage mode when the cell reaches the 4.1 V termination threshold. The transition is continuous without a discrete comparator step, which prevents the overvoltage spikes that can stress Li-ion cells and reduce their usable capacity over hundreds of cycles.
When is LM3622AM-4.1 a better fit than a higher-integration charger IC for a new design?
LM3622AM-4.1 is preferred when the designer already has an external power FET or pass transistor for the charge path and needs only a precision 4.1 V controller without a full charger SoC. Its minimal 8-pin SOIC footprint and low component count make it cost-effective for high-volume consumer products where a full-featured fuel-gauge IC adds unnecessary cost, and its 4.1 V termination suits applications requiring extended cycle life beyond 500 charge/discharge cycles.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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