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LM3420AM5X-16.8 from NSC,National Semiconductor

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LM3420AM5X-16.8

Manufacturer: NSC, NS

Lithium-Ion Battery Charge Controller
Partnumber Manufacturer Quantity Availability
LM3420AM5X-16.8,LM3420AM5X168 NSC, NS 17037 In Stock

Description and Introduction

Lithium-Ion Battery Charge Controller The LM3420AM5X-16.8 is a lithium-ion battery charger controller manufactured by Texas Instruments (formerly National Semiconductor, NS).  

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 75V  
- **Battery Voltage:** 16.8V (4-cell Li-ion)  
- **Package:** SOT-23-5  
- **Charging Current:** Adjustable via external resistor  
- **Charge Termination:** Constant-current/constant-voltage (CC/CV)  
- **Features:**  
  - Thermal regulation  
  - Charge status indication  
  - Low shutdown current (<1µA)  
  - Input undervoltage lockout (UVLO)  
  - External N-channel MOSFET control  

### **Descriptions and Features:**  
- Designed for charging 4-cell Li-ion battery packs (16.8V).  
- Supports high input voltage operation (up to 75V).  
- Adjustable charge current using an external sense resistor.  
- Thermal regulation prevents overheating.  
- Charge status output indicates charging or completion.  
- Low shutdown current minimizes power loss when inactive.  
- Compact SOT-23-5 package for space-constrained applications.  

This IC is commonly used in industrial, automotive, and portable battery charging applications.

Application Scenarios & Design Considerations

Lithium-Ion Battery Charge Controller

Alternative Part Number

  • BQ2058T --: Lithium-ion battery charge controller IC with similar charge-management function, suitable as a functional substitute in battery charger designs.
  • MAX1758EAI+ --: Standalone lithium-ion battery charger controller offering comparable charge control features and a different series naming for easy distinction.
  • LTC1732EMS-4.2 --: Linear lithium-ion battery charger IC with similar single-cell charge termination behavior, usable as an alternative in charger circuits.
  • BQ2057WSN --: Single-cell Li-ion linear charge controller with similar voltage regulation function; TI acquired National Semiconductor, so this is a close functional replacement from the same technology lineage.
  • MCP73831T-2ACI/OT --: Compact single-cell Li-ion/Li-poly charge management controller with programmable regulation, widely available and commonly used as a substitute for LM3420-style battery charger controllers.
  • LTC4054ES5-4.2 --: Standalone linear Li-ion battery charger in a small SOT-23 package, offering comparable charge control functionality for single-cell applications.

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