TNY277GN chip is a switching power controller that integrates PWM controller, high voltage switch and MOSFET. It has a total of eight pins, each of which performs the following functions:
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1. Drain (D) pin: high voltage switch pin. The pin is connected to the winding end of the secondary side system and the high voltage power supply, which is used to control the turn-on and turn-off of the high voltage switch.
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2. Source (S) pin: high voltage switch pin. The pin is connected to the pin on the opposite side of the high voltage switch and is used to control the turn-on and turn-off of the high voltage switch.
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3. Gnd (G) pin: Power ground pin. The pin is connected to the negative terminal of the power supply and receives power supply from the TNY277GN.
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4. Control (C) Pin: Control pin. This pin is used to connect external feedback resistors for constant current or constant voltage characteristics.
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5. Power Good (PG) pin: Power monitoring pin. The pin is used to connect the input voltage monitoring circuit and can wake up the TNY277GN when there is an input voltage.
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6. Vcc (V) pin: controller power supply pin. The pin is connected to an external power supply to provide a working power supply for the TNY277GN.
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7. Sense (SNS) pin: current detection pin. The pin is used to connect the current detection circuit on the output side to realize overload protection.
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8. Thermal Limit (T) pin: Temperature detection pin. This pin is used to connect the analog circuit, detect the temperature of the chip, and trigger protection when the temperature is too high.
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It should be noted that if you want to use the TNY277GN chip, it is recommended that you refer to the relevant chip manuals and design guidelines, and proceed as required in circuit design and use.
Pin 1 (HV) : high voltage input pin for receiving high voltage input signals; 2. Pin 2 (D) : Input pin for input PWM (pulse width modulation) signal; 3. Pin 3 (GND) : Ground pin; 4. Pin 4 (VDD) : chip power supply pin; 5. Pin 5 (OUT) : The output pin is used to connect the output load; 6. Pin 6 (SENSE) : current detection pin, used to detect load current; 7. Pin 7 (CS) : current detection output pin; 8. Pin 8 (FB) : Feedback pin that controls the output voltage.
Each of these pins has a different function, so as to ensure that the tny277gn chip can complete complex circuit control.