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LM3420M5X-12.6 from NATIONAL,National Semiconductor

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LM3420M5X-12.6

Manufacturer: NATIONAL, NAS, NS

Lithium-Ion Battery Charge Controller
Partnumber Manufacturer Quantity Availability
LM3420M5X-12.6,LM3420M5X126 NATIONAL, NAS, NS 78675 In Stock

Description and Introduction

Lithium-Ion Battery Charge Controller The LM3420M5X-12.6 is a lithium-ion battery charger controller from Texas Instruments (formerly National Semiconductor, NS).  

### **Specifications:**  
- **Manufacturer:** Texas Instruments (formerly National Semiconductor)  
- **Part Number:** LM3420M5X-12.6  
- **Package:** SOT-23-5  
- **Input Voltage Range:** 4.5V to 75V  
- **Output Voltage:** 12.6V (adjustable for 3-cell Li-ion batteries)  
- **Charging Current:** Adjustable via external resistor  
- **Operating Temperature Range:** -40°C to +125°C  
- **Features:**  
  - Constant-current/constant-voltage charging  
  - Programmable charge termination  
  - Thermal regulation  
  - Low shutdown current (<1µA)  
  - Under-voltage lockout (UVLO)  
  - Reverse-battery protection  

### **Descriptions:**  
The LM3420M5X-12.6 is a high-voltage battery charger controller designed for 3-cell lithium-ion (Li-ion) battery packs. It provides precise charging control with constant-current and constant-voltage regulation. The device is suitable for applications requiring wide input voltage ranges, such as automotive and industrial systems.  

### **Features:**  
- **Wide Input Voltage Range (4.5V–75V):** Supports high-voltage applications.  
- **Adjustable Charging Current:** Set via an external resistor.  
- **Thermal Regulation:** Prevents overheating during charging.  
- **Low Quiescent Current:** Enhances efficiency in standby mode.  
- **Integrated Protection:** Includes UVLO and reverse-battery protection.  
- **Compact Package:** SOT-23-5 for space-constrained designs.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Lithium-Ion Battery Charge Controller

Alternative Part Number

  • BQ24450 --: Dedicated lead-acid/li-ion battery charge controller IC with programmable charge voltage, functionally similar to the LM3420 battery charger controller family.
  • LT1510 --: Constant-current/constant-voltage battery charger IC supporting lithium-ion chemistry with adjustable float voltage, a common cross for LM3420 charger controllers.
  • MAX1811 --: Single-cell lithium-ion battery charger IC with selectable 4.1V/4.2V regulation, usable as a compact alternative for small battery charging applications.
  • BQ2057WSN --: Single-cell Li-ion charge controller with similar voltage regulation function, widely available and well documented.
  • MCP73831T-2ACI/OT --: Compact Li-ion/Li-Po charge management controller offering comparable charging control in a small package.
  • TP4056 --: Low-cost single-cell Li-ion linear charger IC commonly used as a functional substitute in battery charging circuits.
  • MAX713 --: Battery charge controller IC offering similar charge regulation and termination control, usable as an alternative for battery charging applications.

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