Overview
The TL494BDG is a pulse-width modulation (PWM) control circuit designed primarily for switch-mode power supply control. It is manufactured by ON Semiconductor and is part of their SWITCHMODE™ series. This IC integrates all the necessary functions for constructing a PWM control circuit on a single chip, making it highly versatile for various power supply applications.
Key Specifications
| Part Number | TL494BDG |
|---|---|
| Manufacturer | ON Semiconductor |
| Description | IC REG CTRLR BCK/PSH-PULL 16SOIC |
| Voltage - Supply (Vcc/Vdd) | 7 V ~ 40 V |
| Topology | Buck, Push-Pull |
| Synchronous Rectifier | Yes |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Output Type | Transistor Driver |
| Output Phases | 1 |
| Output Configuration | Positive |
| Number of Outputs | 2 |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Frequency - Switching | 200kHz |
| Duty Cycle (Max) | 48% |
| Control Features | Dead Time Control, Frequency Control |
Key Features
- Complete PWM power-control circuitry
- On-chip adjustable oscillator with master or slave operation
- On-chip error amplifiers and a 5-V reference supply with 5% tolerance
- 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 total range
- Undervoltage lockout
Applications
- Desktop PCs
- Microwave Ovens
- Power Supplies: AC/DC, isolated, with or without PFC
- Server PSUs
- Solar Micro-Inverters
- Washing Machines: Low-End and High-End
- E-Bikes
- Telecom/Server AC/DC Supplies: Dual Controller: Analog
- Smoke Detectors
- Solar Power Inverters
Q & A
- What is the TL494BDG used for?
The TL494BDG is used primarily for switch-mode power supply control, integrating all necessary functions for constructing a PWM control circuit on a single chip.
- What is the voltage supply range for the TL494BDG?
The voltage supply range for the TL494BDG is 7 V to 40 V.
- What are the output configurations available for the TL494BDG?
The TL494BDG supports both single-ended and push-pull output configurations.
- What is the maximum operating temperature for the TL494BDG?
The maximum operating temperature for the TL494BDG is 125°C (TJ).
- Does the TL494BDG have an on-chip oscillator?
Yes, the TL494BDG has an on-chip adjustable oscillator with master or slave operation.
- What are the key control features of the TL494BDG?
The key control features include dead time control and frequency control.
- Is the TL494BDG RoHS compliant?
Yes, the TL494BDG is lead-free and RoHS compliant.
- What are some common applications of the TL494BDG?
Common applications include desktop PCs, microwave ovens, power supplies, server PSUs, solar micro-inverters, and more.
- What is the switching frequency of the TL494BDG?
The switching frequency of the TL494BDG is 200kHz.
- Does the TL494BDG have undervoltage lockout protection?
Yes, the TL494BDG includes undervoltage lockout protection.
