TL594CDRG4

The TL594CDRG4 from Texas Instruments is a complete pulse-width-modulation (PWM) power-control circuit integrated onto a single chip. Designed primarily for power supply control, it offers flexibility for engineers to tailor control circuitry to specific applications. This device incorporates features such as two error amplifiers, an on-chip adjustable oscillator, a dead-time control comparator, and a pulse-steering control flip-flop.

Key electrical specifications include a wide supply voltage range of 7V to 40V and an operating temperature range of 0°C to 70°C. The controller supports multiple topologies including Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, and Push-Pull configurations. It offers control features like dead time control and frequency control, with a maximum duty cycle of 97% and a frequency range of 1kHz to 300kHz.

The TL594CDRG4 provides uncommitted outputs capable of 200-mA sink or source current and allows selection between single-ended or push-pull operation. Internal circuitry prevents double pulsing at either output, and variable dead time control is available. It also includes an internal regulator for a stable 5-V reference supply, trimmed to 1% precision, and an undervoltage lockout (UVLO) circuit to ensure proper operation at low VCC conditions.

Packaged in a 16-SOIC surface mount configuration, the TL594CDRG4 is suitable for various applications including white goods, power supplies (AC/DC, isolated, with or without PFC), server PSUs, and solar micro-inverters.