Overview
The TL494CDR2 is a fixed-frequency, pulse-width modulation (PWM) control circuit designed primarily for switch-mode power supply control. It is manufactured by onsemi and is part of the SWITCHMODE™ series. This integrated circuit incorporates all the necessary functions for constructing a PWM control circuit, making it highly versatile for various power supply applications.
Key Specifications
| Parameter | 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) | 200 | mA | ||
| Average Supply Current (ICC) | 7.0 | 10 | mA | |
| Switching Frequency | 40 | kHz | ||
| Duty Cycle (Max) | 48% | |||
| Operating Temperature Range | -40 | 125 | °C | |
| Package Type | SOIC-16 |
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
Applications
The TL494CDR2 is designed primarily for switch-mode power supply control and is suitable for a variety of applications, including:
- Switch-mode power supplies
- DC-DC converters
- Power supply control circuits
- Synchronous multiple-rail power supplies
- Automotive and industrial power systems
Q & A
- What is the primary function of the TL494CDR2?
The TL494CDR2 is a fixed-frequency, pulse-width modulation (PWM) control circuit designed primarily for switch-mode power supply control.
- What is the operating voltage range of the TL494CDR2?
The operating voltage range is from 7.0 V to 40 V.
- What is the maximum collector output current per transistor?
The maximum collector output current per transistor is 200 mA.
- Does the TL494CDR2 have an on-chip oscillator?
Yes, it has an on-chip adjustable oscillator.
- What is the typical switching frequency of the TL494CDR2?
The typical switching frequency is 40 kHz.
- Can the TL494CDR2 operate in push-pull or single-ended mode?
Yes, it can operate in both push-pull and single-ended modes.
- What is the purpose of the on-chip 5.0 V reference?
The on-chip 5.0 V reference provides a stable voltage for the internal circuitry and acts as a preregulator.
- Is the TL494CDR2 available in Pb-free packages?
Yes, Pb-free packages are available.
- What is the operating temperature range of the TL494CDR2?
The operating temperature range is from -40°C to 125°C.
- What package types are available for the TL494CDR2?
The TL494CDR2 is available in SOIC-16 packages.
