Overview
The TL494BDR2G, produced by onsemi, is a pulse-width modulation (PWM) control circuit designed primarily for switch-mode power supply control. This device integrates all the necessary functions for constructing a PWM control circuit on a single chip, offering flexibility to tailor the power-supply control circuitry to specific applications.
The TL494BDR2G includes two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, and a 5-V, 5%-precision regulator. It also features output-control circuits and uncommitted output transistors rated to 500 mA source or sink current.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Voltage | VCC | 7.0 | 15 | 40 | V |
| Collector Output Voltage | VC1, VC2 | -30 | 40 | V | |
| Collector Output Current (Each transistor) | IC1, IC2 | 500 | mA | ||
| Oscillator Frequency | fosc | 1.0 | 40 | 200 | kHz |
| Reference Voltage | Vref | 4.75 | 5.0 | 5.25 | V |
| Operating Ambient Temperature Range | TA | -40 | 85 | °C |
Key Features
- Complete Pulse Width Modulation Control Circuitry
- On-Chip Oscillator with Master or Slave Operation
- On-Chip Error Amplifiers
- On-Chip 5.0 V Reference with 5% Precision
- Adjustable Deadtime Control
- Uncommitted Output Transistors Rated to 500 mA Source or Sink
- Output Control for Push-Pull or Single-Ended Operation
- Undervoltage Lockout
- Pb-Free Packages Available
- Variable Frequency Operation (up to 200 KHz)
Applications
- Desktop PCs
- Microwave Ovens
- AC/DC Power Supplies with or without PFC
- Server PSUs
- Solar Micro-Inverters
- Washing Machines (Low-End and High-End)
- E-Bikes
- Telecom/Server AC/DC Supplies
- Smoke Detectors
- Solar Power Inverters
Q & A
- What is the primary function of the TL494BDR2G?
The TL494BDR2G is a pulse-width modulation (PWM) control circuit designed primarily for switch-mode power supply control.
- What are the key components integrated into the TL494BDR2G?
The device includes two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, and a 5-V, 5%-precision regulator.
- What is the range of the oscillator frequency in the TL494BDR2G?
The oscillator frequency can range from 1.0 kHz to 200 kHz.
- What types of output operations are supported by the TL494BDR2G?
The device supports both push-pull and single-ended output operations.
- What is the maximum collector output current for each transistor?
The maximum collector output current for each transistor is 500 mA.
- What is the operating ambient temperature range for the TL494BDR2G?
The operating ambient temperature range is from -40°C to 85°C.
- Does the TL494BDR2G have undervoltage lockout protection?
- What is the reference voltage provided by the TL494BDR2G?
The device provides a 5-V reference voltage with 5% precision.
- Can the TL494BDR2G be used in automotive applications?
- Is the TL494BDR2G available in Pb-free packages?
