The TL494 is a versatile pulse-width modulation (PWM) control device featuring two error amplifiers, an adjustable on-chip oscillator, a dead-time control (DTC) comparator, a pulse-steering flip-flop, a precise 5-V regulator, and output-control circuits. The error amplifiers support a common-mode voltage range from –0.3 V to VCC – 2 V. The DTC comparator incorporates a fixed offset, ensuring approximately 5% dead time. The on-chip oscillator can either be bypassed by connecting RT to the reference output and supplying a sawtooth signal to CT or used to synchronize common circuits in multi-rail power supplies.

The device’s uncommitted output transistors support both common-emitter and emitter-follower configurations, with output control allowing selection between push-pull or single-ended operation. During push-pull operation, the architecture prevents either output from pulsing twice. The TL494C is rated for operation within a temperature range of 0°C to 70°C.

Key Features:

• Integrated PWM power control circuitry
• Uncommitted outputs capable of 200 mA sink or source current
• Output control supporting single-ended or push-pull configurations
• Double pulse prevention at outputs during push-pull operation
• Adjustable dead time for full-range control
• Internal 5-V regulator with 5% tolerance for stable reference
• Easily synchronized circuit architecture

Specifications:

• Supply Voltage (VCC): Up to 41 V
• Amplifier Input Voltage (VI): Up to VCC + 0.3 V
• Collector Output Voltage (VO): Up to 41 V
• Collector Output Current (IO): Up to 250 mA
• Lead Temperature (1.6 mm from case): Up to 260°C
• Storage Temperature Range (Tstg): –65°C to 150°C