Overview
The TL494CNG 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 offers flexibility to tailor the power-supply control circuitry to specific applications, making it versatile for various power management needs.
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 | ||
| Frequency | 200 | kHz | ||
| Duty Cycle (Max) | 48% | |||
| Operating Temperature | 0 | 70 | °C | |
| Package Type | SOIC-16, PDIP-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
- Off-line power supply
- Buck converter
- Vehicle Power Adapter (VPA)
- LED Lighting
- Synchronous multiple-rail power supplies
Q & A
- What is the primary function of the TL494CNG?
The TL494CNG is a pulse-width modulation (PWM) control circuit designed primarily for switch-mode power supply control.
- What are the key components of the TL494CNG?
The device includes two error amplifiers, an on-chip adjustable oscillator, a dead-time control comparator, a pulse-steering control flip-flop, and a 5-V reference regulator.
- What is the operating voltage range of the TL494CNG?
The power supply voltage (VCC) ranges from 7.0 V to 40 V.
- What is the maximum collector output current for each transistor?
The maximum collector output current for each transistor is 200 mA.
- Can the TL494CNG operate in both push-pull and single-ended configurations?
Yes, the TL494CNG can operate in both push-pull and single-ended output configurations.
- What is the typical frequency range of the TL494CNG?
The typical frequency range is up to 200 kHz.
- Does the TL494CNG have undervoltage lockout protection?
Yes, the TL494CNG includes undervoltage lockout protection.
- Is the TL494CNG available in Pb-free packages?
Yes, Pb-free packages are available for the TL494CNG.
- What are some common applications of the TL494CNG?
Common applications include off-line power supplies, buck converters, vehicle power adapters, and LED lighting.
- What is the operating temperature range for the TL494CNG?
The operating temperature range is from 0°C to 70°C for the TL494C model.
