Overview
The TL594CD, produced by Texas Instruments, is a precision switchmode pulse-width-modulation (PWM) control circuit. This device is designed primarily for the control of switching power supplies and incorporates all the necessary functions for PWM control on a single chip. It offers systems engineers the flexibility to tailor the power-supply control circuitry to specific applications. The TL594CD includes features such as an on-chip adjustable oscillator, two error amplifiers, a dead-time control comparator, a pulse-steering control flip-flop, and a stable 5-V reference regulator with 1% accuracy.
Key Specifications
| Parameter | 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 | 500 mA | mA | ||
| Reference Voltage Accuracy | 1% | % | |||
| Operating Temperature Range | 0°C | 70°C | °C |
Key Features
- Complete PWM power-control circuitry on a single chip.
- On-chip adjustable oscillator with master or slave operation.
- Two on-chip error amplifiers.
- Internal 5-V reference regulator with 1% accuracy.
- Uncommitted output transistors rated to 500 mA source or sink current.
- Output control for push-pull or single-ended operation.
- Variable dead time control.
- Undervoltage lockout (UVLO) for low-VCC conditions).
- Circuit architecture allows easy synchronization).
Applications
- Switchmode power supplies: AC/DC, isolated, with or without PFC, > 90 W and < 90 W.
- Server power supplies.
- Solar micro-inverters and solar power inverters).
- Telecom/server AC/DC supplies).
- White goods).
Q & A
- What is the primary function of the TL594CD?
The TL594CD is a precision switchmode pulse-width-modulation (PWM) control circuit designed primarily for the control of switching power supplies).
- What is the accuracy of the internal 5-V reference regulator?
The internal 5-V reference regulator has an accuracy of 1%).
- What types of output operations are supported by the TL594CD?
The TL594CD supports both push-pull and single-ended output operations).
- What is the maximum collector output current for each transistor?
The maximum collector output current for each transistor is 500 mA).
- Does the TL594CD have undervoltage lockout protection?
Yes, the TL594CD includes undervoltage lockout (UVLO) protection for low-VCC conditions).
- Can the on-chip oscillator be bypassed?
Yes, the on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT).
- What is the operating temperature range of the TL594CD?
The operating temperature range is from 0°C to 70°C).
- Is the TL594CD RoHS compliant?
Yes, the TL594CD is Pb-free, halogen-free/BFR-free and RoHS compliant).
- What are some common applications of the TL594CD?
Common applications include switchmode power supplies, server power supplies, solar micro-inverters, telecom/server AC/DC supplies, and white goods).
- How many active transistors does the TL594CD contain?
The TL594CD contains 46 active transistors).
