TC3776B
product description
The TC3776 series is a highly integrated self-powered PSR control chip for isolated adapters and chargers. The peripheral design is extremely simple. The TC3776 series fixes the peak current of the primary side, and sets the output constant current point through the primary and secondary turns ratio of the transformer; sets the output constant voltage point by setting an FB resistor.
In order to achieve the ultimate simplification of system cost, TC3776 series has a built-in startup circuit, no external startup resistor is required, built-in FB down-bias resistor, fixed peak current to achieve the elimination of current limiting resistor; TC3776 series in order to optimize the consistency of output current, built-in input line voltage Compensation function: In order to save peripheral wires, the TC3776 series adopts a fixed output cable compensation method for output voltage compensation.
The TC3776 series integrates a variety of protection functions, including VCC clamp/undervoltage protection, output short-circuit protection, and over-temperature protection.
main feature
• Integrated BJT, suitable for isolation solutions of 5W and below
• Self-powered to optimize system cost
• Standby power consumption 75mW
• Built-in FB down-bias resistor
• Built-in high-precision fixed peak current, high precision of constant current
• Output line loss compensation technology
• Output short circuit protection function
• VCC undervoltage protection function
• Over temperature protection
• Package form: SOP-7
Scope of application
• Adapter, charger
• LED drive power
• Linear power supply and RCC switching power supply upgrade
• Other auxiliary power
Related documents
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