LM5035CSQX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - High voltage input range - Wide operating frequency range - Adjustable soft-start time - Overvoltage protection - Undervoltage lockout - Current limit protection

Package: 16-pin WQFN package

Essence: The LM5035CSQX/NOPB is a voltage mode PWM controller designed for high voltage applications. It provides various protection features and offers flexibility in controlling power converters.

Packaging/Quantity: The LM5035CSQX/NOPB is available in a 16-pin WQFN package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 4.5V to 100V
• Operating Frequency Range: 50kHz to 1MHz
• Soft-Start Time: Adjustable from 0ms to 20ms
• Overvoltage Protection Threshold: Adjustable from 110% to 140% of the reference voltage
• Undervoltage Lockout Threshold: Adjustable from 3.5V to 8V
• Current Limit Protection: Adjustable from 0.5A to 10A

Pin Configuration

The LM5035CSQX/NOPB has the following pin configuration:

1. VCC - Power supply voltage input
2. GND - Ground reference
3. FB - Feedback voltage input
4. COMP - Error amplifier output
5. SS/TR - Soft-start/Tracking control input
6. RT/CT - Oscillator timing components connection
7. SYNC - Synchronization input
8. UVLO - Undervoltage lockout control input
9. OVP - Overvoltage protection control input
10. CS - Current sense input
11. SS/TR - Soft-start/Tracking control input
12. RT/CT - Oscillator timing components connection
13. SYNC - Synchronization input
14. UVLO - Undervoltage lockout control input
15. OVP - Overvoltage protection control input
16. CS - Current sense input

Functional Features

• Voltage mode PWM control
• Adjustable soft-start time for controlled startup
• Overvoltage protection to prevent damage to the system
• Undervoltage lockout for reliable operation under low voltage conditions
• Current limit protection to protect against excessive current draw

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile applications - Adjustable soft-start time enables controlled startup - Various protection features enhance system reliability - High operating frequency range provides flexibility in power converter design

Disadvantages: - Limited pin configuration options may restrict certain circuit designs - Requires external timing components for oscillator operation

Working Principles

The LM5035CSQX/NOPB operates as a voltage mode PWM controller. It compares the feedback voltage (FB) with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the power converter.

During startup, the soft-start feature gradually increases the duty cycle to prevent excessive inrush current. The overvoltage protection monitors the output voltage and shuts down the converter if it exceeds a set threshold. The undervoltage lockout ensures that the converter operates within a safe voltage range. The current limit protection prevents excessive current flow through the power converter.

Detailed Application Field Plans

The LM5035CSQX/NOPB is suitable for various applications, including: - Power supplies for industrial equipment - Telecom and networking systems - Automotive electronics - LED lighting systems - Renewable energy systems

Detailed and Complete Alternative Models

• LM5034CSQX/NOPB
• LM5036CSQX/NOPB
• LM5037CSQX/NOPB
• LM5038CSQX/NOPB
• LM5039CSQX/NOPB

These alternative models offer similar functionality and can be used as replacements for the LM5035CSQX/NOPB in different applications.

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