Overview
The TL494IDG4 is a pulse-width-modulation (PWM) control circuit integrated into a single chip, designed and manufactured by Texas Instruments. This device is primarily used in the construction of switching power supplies and offers a high degree of flexibility to tailor the power-supply control circuitry to specific applications. The TL494IDG4 incorporates all the necessary functions for PWM control, including two error amplifiers, an on-chip adjustable oscillator, a dead-time control comparator, a pulse-steering control flip-flop, and a 5-V reference supply with 5% precision.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Control Method | Voltage | |
| Duty Cycle (Max) | 45% | |
| Frequency (Max) | 300 kHz | |
| Frequency (Min) | 1 kHz | |
| Gate Drive (Typ) | 0.2 A | |
| Operating Temperature Range | -40 to 85°C | |
| Package Type | SOIC | |
| Pin Count | 16 | |
| Vin (Max) | 38 V | |
| Vin (Min) | -0.3 V | |
| Topology | Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull |
Key Features
- Complete PWM power-control circuitry on a single chip.
- Uncommitted outputs for 200-mA sink or source current.
- Output control selects single-ended or push-pull operation.
- Internal circuitry prohibits double pulse at either output.
- Variable dead time provides control over the total range.
- Internal regulator provides a stable 5-V reference supply with 5% tolerance.
- Circuit architecture allows easy synchronization.
- Adjustable switching frequency and error amplifier.
- Multi-topology support including Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, and Push-Pull).
Applications
- Desktop PCs).
- Microwave ovens).
- AC/DC power supplies with or without PFC).
- Server power supplies).
- Solar micro-inverters and solar power inverters).
- Washing machines (low-end and high-end)).
- E-bikes).
- Telecom/server AC/DC supplies).
- Smoke detectors).
Q & A
- What is the primary function of the TL494IDG4?
The TL494IDG4 is a pulse-width-modulation (PWM) control circuit primarily used in the construction of switching power supplies).
- What are the key components of the TL494IDG4?
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 supply).
- What is the operating temperature range of the TL494IDG4?
The operating temperature range is -40 to 85°C).
- What are the supported topologies by the TL494IDG4?
The device supports various topologies including Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, and Push-Pull).
- What is the maximum duty cycle of the TL494IDG4?
The maximum duty cycle is 45%).
- What is the maximum frequency of the TL494IDG4?
The maximum frequency is 300 kHz).
- What is the typical gate drive current of the TL494IDG4?
The typical gate drive current is 0.2 A).
- What is the package type of the TL494IDG4?
The package type is SOIC with 16 pins).
- What are some common applications of the TL494IDG4?
Common applications include desktop PCs, microwave ovens, AC/DC power supplies, server power supplies, solar micro-inverters, and washing machines).
- Is the TL494IDG4 suitable for new designs?
