Overview
The TL494CDR2G is a pulse-width modulation (PWM) control circuit produced by onsemi. This device is designed primarily for switch-mode power supply control and incorporates all the necessary functions for constructing a PWM control circuit on a single chip. It features an on-chip oscillator, error amplifiers, a dead-time control comparator, and output-control circuits, 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) | - | 5.5 | 10 | mA |
| Output Voltage (REF) | 4.75 | 5 | 5.25 | V |
| Input Regulation | - | - | 25 | mV |
| Output Regulation | - | - | 15 | mV |
| Short-Circuit Output Current | - | - | 25 | mA |
Key Features
- Complete PWM power-control circuitry
- On-chip oscillator with master or slave operation
- On-chip error amplifiers
- On-chip 5.0 V reference with 5% tolerance
- 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
- 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 TL494CDR2G?
The TL494CDR2G is a pulse-width modulation (PWM) control circuit designed primarily for switch-mode power supply control. - What is the operating voltage range of the TL494CDR2G?
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 TL494CDR2G have an on-chip oscillator?
Yes, it has an on-chip oscillator with master or slave operation. - What is the output voltage of the internal 5.0 V reference?
The output voltage of the internal 5.0 V reference is 5 V with a 5% tolerance. - Can the TL494CDR2G 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 dead-time control comparator?
The dead-time control comparator provides adjustable dead time to prevent simultaneous conduction of the output transistors. - Is the TL494CDR2G available in Pb-free packages?
Yes, Pb-free packages are available. - What are some common applications of the TL494CDR2G?
Common applications include desktop PCs, microwave ovens, AC/DC power supplies, server PSUs, and solar micro-inverters. - What is the temperature range for the TL494I device?
The TL494I device is characterized for operation from –40°C to 85°C.
