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LM3420M5X-8.2 from NS国半,National Semiconductor

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LM3420M5X-8.2

Manufacturer: NS国半, NATIONAL, NS

Lithium-Ion Battery Charge Controller
Partnumber Manufacturer Quantity Availability
LM3420M5X-8.2,LM3420M5X82 NS国半, NATIONAL, NS 49000 In Stock

Description and Introduction

Lithium-Ion Battery Charge Controller The LM3420M5X-8.2 is a linear LED driver manufactured by Texas Instruments (formerly National Semiconductor, NS).  

### **Specifications:**  
- **Output Voltage:** 8.2V (fixed)  
- **Input Voltage Range:** 4.5V to 75V  
- **Output Current:** Adjustable (external resistor)  
- **Package:** SOT-23-5 (M5X)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Regulation Method:** Linear (constant current)  
- **Features Overtemperature Protection**  

### **Descriptions:**  
The LM3420M5X-8.2 is designed for driving high-power LEDs in applications requiring a stable current source. It operates over a wide input voltage range and provides a fixed 8.2V output, making it suitable for LED strings requiring precise voltage regulation.  

### **Features:**  
- **Wide Input Voltage Range (4.5V to 75V)**  
- **Fixed 8.2V Output (for LED voltage reference)**  
- **Adjustable Output Current via External Resistor**  
- **Thermal Shutdown Protection**  
- **Small SOT-23-5 Package**  
- **Suitable for Automotive, Industrial, and General LED Lighting Applications**  

This device is commonly used in LED driver circuits for automotive lighting, architectural lighting, and industrial applications.

Application Scenarios & Design Considerations

Lithium-Ion Battery Charge Controller

Alternative Part Number

  • BQ24074RGTR --: TI linear battery charger IC in the same function class as the LM3420, with adjustable charge control and a different naming series, making it a strong drop-in candidate for single-cell lithium charging designs.
  • MCP73831T-2ACI/OT --: Compact single-cell Li-Ion/Li-Po charge management controller with programmable current, widely used as a replacement for National linear charger controllers and clearly distinct in part numbering.
  • LTC4054ES5-4.2 --: Standalone linear Li-Ion battery charger in a small package, functionally comparable to the LM3420 family and from a different series, suitable for space-constrained portable applications.
  • BQ2057WSN --: Single-cell Li-ion charge controller in SOT-23, similar function to the LM3420 8.2V regulator and widely available from TI (which acquired National Semiconductor).
  • TP4056 --: Low-cost single-cell Li-ion linear charger IC with similar voltage regulation role, frequently used as a replacement in battery charging designs.

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