TF12A4 - Low Power OFF-Line SMPS Primary Switcher

Product Type: AC-DC Regulators
Current Status: Final

Product Overview
The TF12A4 is a low power primary switcher best suitable for Off-line SMPS battery charger adapters, auxiliary power supplies for industrial systems and standby power supplies for TVs or monitors . It consists of a dedicated current mode PWM controller and a high-voltage Power MOSFET.
The TF12A4 operates at fixed 60 kHz switching frequency. Its control circuitry provides large VDD range desired in applications in which auxiliary power supply changes are expected. It also provides over-voltage, over-current and over- temperature protection.
The TF12A4 is offered in 8-pin PDIP and SOIC narrow packages. It operates over an extended -40 °C to +85 °C temperature range.

Features

• VDD range: 9V to 38V
• 60 kHz fixed frequency operation
• Current-mode control
• Auxiliary under-voltage lockout with hysteresis
• High-voltage start-up current source
• Over-voltage, over-current and over-temperature protection with auto-restart
• Industrial temperature range: -40 °C to +85 °C
• Drop-in replacement for the VIPer12A in Flyback applications only