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TL494CN / TL494C / TL494 DIP-16 PWM Power Supply Controller IC (5-Pack)
TL494CN / TL494C / TL494 DIP-16 PWM Power Supply Controller IC (5-Pack)
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TL494CN / TL494C — DIP-16 PWM Power Supply Controller IC
The TL494 is a fixed-frequency pulse-width modulation (PWM) control circuit widely used in switch-mode power supplies, DC-DC converters, and inverters. This listing provides 5 pieces of the TL494CN / TL494C in DIP-16 through-hole package — new and original parts.
Key Specifications
| Parameter | Value |
|---|---|
| Part Numbers | TL494CN / TL494C / TL494 |
| Package | DIP-16 |
| Supply Voltage (Vcc) | 7V – 40V |
| Output Current (per driver) | 200mA sink/source |
| Oscillator Frequency | 1Hz – 300kHz (set by RT/CT) |
| Error Amplifiers | 2 (differential, with 70dB gain) |
| Dead-Time Control | 0–45% (programmable) |
| Output Modes | Single-ended or push-pull |
| Reference Voltage | 5V ±1% internal |
| Operating Temperature | 0°C to +70°C |
| Quantity | 5 PCS |
Why Choose TL494CN?
- ✅ Industry-standard PWM controller — used in millions of SMPS designs worldwide
- ✅ Dual error amplifiers — independent voltage and current control loops
- ✅ Push-pull output — directly drives transformer primary in full-bridge/half-bridge topologies
- ␅ Programmable dead-time — prevents shoot-through in push-pull stages
- ✅ 5V internal reference — no external reference IC needed
- ✅ New & original — genuine TI/ST/ON-compatible parts
Compatible With / Works With
- Push-pull SMPS transformer drivers (EI33, EE42, EE55 cores)
- ATX power supply repair and modification
- 12V to 220V inverter driver stages
- DC-DC boost converter control (12V to 48V)
- Motor speed controller PWM stages
Typical Applications
- ATX Power Supply — primary PWM controller in desktop PC power supplies
- 12V–220V Inverter — push-pull driver for EI33/EE42 transformer
- DC-DC Converter — boost/buck-boost topology control up to 300kHz
- UPS Inverter Stage — sine-wave or square-wave output control
- Motor PWM Controller — variable frequency drive for DC motors
FAQ
Q: What is the difference between TL494CN and TL494IN?
A: TL494CN is the commercial grade (0°C to +70°C), TL494IN is the industrial grade (-40°C to +85°C). Electrically identical — same pinout and function.
Q: Can TL494 drive MOSFETs directly?
A: The TL494 output can sink/source 200mA, which is sufficient for small gate capacitances. For high-frequency designs or large MOSFETs, add a gate driver IC (IR2110, TC4420) between TL494 and the MOSFET gate.
Q: How do I set the switching frequency?
A: Connect a resistor (RT) between pin 6 and Vref, and a capacitor (CT) between pin 5 and GND. Frequency ≈ 1.1 / (RT × CT). For 50kHz: RT=22kΩ, CT=1nF.
Package Contents
- 5× TL494CN / TL494C / TL494 DIP-16 PWM Controller IC
