Overview
The TL594CDR2, produced by onsemi, is a fixed-frequency pulse width modulation (PWM) control circuit designed primarily for switchmode power supply control. This integrated circuit incorporates the primary building blocks necessary for controlling switching power supplies, including an internal linear sawtooth oscillator, error amplifiers, and output transistors.
The TL594CDR2 is available in various packages, including SOIC-16 and TSSOP-16, and is Pb-free, halogen-free, and RoHS compliant. It operates over a wide temperature range and is suitable for a variety of power supply applications.
Key Specifications
| Characteristics | 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 | - | - | 200 mA | mA |
| Oscillator Frequency | fosc | 1.0 | 40 | 300 | kHz |
| Reference Voltage | Vref | 4.925 | 4.9 | 5.075 | V |
| Operating Junction Temperature | TJ | - | - | 125 | °C |
| Operating Ambient Temperature Range | TA | -40 | - | 85 | °C |
Key Features
- Complete PWM control circuitry with an internal linear sawtooth oscillator.
- On-chip error amplifiers and a 5.0 V reference with 1.5% accuracy.
- Adjustable deadtime control and uncommitted output transistors rated to 500 mA source or sink.
- Output control for push-pull or single-ended operation.
- Undervoltage lockout and frequency-programmable by two external components (RT and CT).
- Pb-free, halogen-free, and RoHS compliant.
Applications
The TL594CDR2 is primarily used in the control of switching power supplies. It is suitable for various power supply configurations, including push-pull and single-ended operations. The device is also used in applications requiring precise PWM control, such as DC-DC converters, power amplifiers, and other switchmode power supply circuits.
Q & A
- What is the primary function of the TL594CDR2?
The TL594CDR2 is a fixed-frequency pulse width modulation (PWM) control circuit designed primarily for switchmode power supply control.
- What are the key components of the TL594CDR2?
The key components include an internal linear sawtooth oscillator, error amplifiers, a 5.0 V reference, and output transistors.
- What is the operating voltage range of the TL594CDR2?
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.
- How is the oscillator frequency programmed?
The oscillator frequency is programmed by two external components, RT and CT.
- What is the accuracy of the internal 5.0 V reference?
The internal 5.0 V reference has an accuracy of ±1.5%.
- Does the TL594CDR2 support push-pull and single-ended operations?
Yes, the TL594CDR2 supports both push-pull and single-ended operations.
- Is the TL594CDR2 RoHS compliant?
Yes, the TL594CDR2 is Pb-free, halogen-free, and RoHS compliant.
- What is the operating ambient temperature range of the TL594CDR2?
The operating ambient temperature range is from -40°C to 85°C.
- What are some common applications of the TL594CDR2?
Common applications include DC-DC converters, power amplifiers, and other switchmode power supply circuits.
