Overview
The TL594CDG is a precision switchmode pulse width modulation (PWM) control circuit produced by onsemi. This integrated circuit is designed primarily for the control of switching power supplies and incorporates all the necessary building blocks for PWM control on a single chip. It features an on-chip oscillator, error amplifiers, a 5.0 V reference voltage, and uncommitted output transistors, making it versatile for various power supply applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Voltage (VCC) | 7.0 - 40 | V |
| Collector Output Voltage (VC1, VC2) | -30 to 40 | V |
| Collector Output Current (Each Transistor) | 500 mA | mA |
| Operating Temperature | -40°C to 85°C | °C |
| Package Type | 16-SOIC | |
| Switching Frequency | Up to 300 kHz | kHz |
| Duty Cycle (Max) | 48% | % |
| Output Configuration | Push-Pull or Single-Ended | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Key Features
- Complete PWM control circuitry
- On-chip oscillator with master or slave operation
- On-chip error amplifiers
- On-chip 5.0 V reference with 1.5% accuracy
- Adjustable deadtime control
- Uncommitted output transistors rated to 500 mA source or sink
- Output control for push-pull or single-ended operation
- Undervoltage lockout (UVLO) for low-VCC conditions
- Pb-free, halogen-free, and RoHS compliant
Applications
- Switchmode power supplies
- AC/DC power supplies with or without PFC
- Server power supplies
- Solar micro-inverters and power inverters
- Telecom and server AC/DC supplies
- White goods
Q & A
- What is the primary function of the TL594CDG? The TL594CDG is a precision switchmode pulse width modulation (PWM) control circuit designed primarily for the control of switching power supplies.
- What is the operating voltage range of the TL594CDG? 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 500 mA.
- What types of output configurations are supported by the TL594CDG? The TL594CDG supports both push-pull and single-ended output configurations.
- Does the TL594CDG have undervoltage lockout protection? Yes, the TL594CDG has an undervoltage lockout (UVLO) feature that locks the outputs off until the internal circuitry is operational.
- What is the typical switching frequency of the TL594CDG? The typical switching frequency can be up to 300 kHz, programmable by external components.
- Is the TL594CDG RoHS compliant? Yes, the TL594CDG is Pb-free, halogen-free, and RoHS compliant.
- What are the common applications of the TL594CDG? Common applications include switchmode power supplies, AC/DC power supplies, server power supplies, solar micro-inverters, and telecom/server AC/DC supplies.
- How is the oscillator frequency programmed in the TL594CDG? The oscillator frequency is programmed by selecting external timing components RT and CT.
- Does the TL594CDG have on-chip error amplifiers? Yes, the TL594CDG includes on-chip error amplifiers.
