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2022-09-24 23:16:53
TEA1039 - Switch Mode Power Supply for Control Circuits
Overview The TEA1039 is a bipolar integrated circuit designed for switch-mode power supply control purposes. Together with external error amplifiers and voltage regulators (eg a Zener diode) form a complete control system. The circuit can directly drive the switching power supply of the low-power transistor switching power supply system.
Features:
·Suitable for frequency and duty cycle adjustment.
·Suitable for flyback converters and forward converters.
· Wide frequency range.
· Adjustable input sensitivity.
· Adjustable minimum frequency and maximum duty cycle limits.
·Adjustable overcurrent protection limit.
· Power supply voltage out-of-range protection.
· Slow start facility.
Functional Description The TEA1039 generates pulses to drive a transistor switching power supply. These pulses may be different either in frequency (frequency regulation mode), or in width (duty cycle regulation mode). The usual arrangement is this: the transistor switching power supply is ON when the TEA1039 output is high, ie when the open collector output transistor is OFF. The factor responsible for this switching power supply is time, the output of the TEA1039 is the division of high pulse repetition time.