BTS149NKSA1

Product Overview

Category: Power Transistor
Use: High-side switch for automotive applications
Characteristics: High current capability, low on-resistance, integrated protection features
Package: TO-263-7 (D2PAK)
Essence: N-channel vertical power MOSFET with integrated control and protection functions
Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Drain-source voltage: 55V
• Continuous drain current: 40A
• On-state resistance: 12mΩ
• Input logic level: 3.3V / 5V
• Operating temperature range: -40°C to +150°C

Detailed Pin Configuration

1. GND (Ground)
2. IN (Input)
3. OUT (Output)
4. Vbb (Bootstrap supply voltage)
5. VS (Supply voltage)
6. NC (No connection)
7. PGND (Power ground)

Functional Features

• Overtemperature shutdown
• Overvoltage protection
• Overcurrent protection
• Short-circuit protection
• Undervoltage lockout
• Fast demagnetization of inductive loads

Advantages

• High current handling capability
• Low on-resistance reduces power dissipation
• Integrated protection features enhance system reliability
• Wide operating temperature range allows for versatile applications
• Fast demagnetization protects inductive loads

Disadvantages

• Relatively high cost compared to traditional discrete components
• Limited availability in small quantities
• Requires careful thermal management due to high power dissipation

Working Principles

The BTS149NKSA1 is a high-side switch that utilizes an N-channel vertical power MOSFET as the main switching element. It is designed to control high currents in automotive applications. The device operates by applying a logic-level input signal to the IN pin, which controls the switching of the MOSFET. When the input is high, the MOSFET turns on, allowing current to flow from the supply voltage (VS) to the output (OUT). Conversely, when the input is low, the MOSFET turns off, interrupting the current flow.

The BTS149NKSA1 incorporates various protection features such as overtemperature shutdown, overvoltage protection, overcurrent protection, short-circuit protection, and undervoltage lockout. These features ensure safe operation and protect the device and the connected load from damage.

Detailed Application Field Plans

The BTS149NKSA1 is widely used in automotive applications that require high-side switching, such as:

1. Automotive lighting systems
2. Motor control for power windows and sunroofs
3. Heating, ventilation, and air conditioning (HVAC) systems
4. Power distribution modules
5. Battery management systems

Detailed and Complete Alternative Models

1. BTS141: Similar specifications, different package (TO-220AB)
2. BTS50085-1TMA: Higher current capability, similar characteristics, different package (TO-263-5)

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