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TS3404 データシート(PDF) 2 Page - Taiwan Semiconductor Company, Ltd |
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TS3404 データシート(HTML) 2 Page - Taiwan Semiconductor Company, Ltd |
2 / 10 page Pin Descriptions No. Pin. Descriptions 1 Boot This pin provides ground referenced bias voltage to the upper MOSFET driver. A bootstrap circuit is used to create a voltage suitable to drive a logic-lever N-channel MOSFET. It can take 20V as the maximum voltage. It can be powered by a DC power supply or powered by a boost strap circuit. 2 Ugate This pin provides the PWM controlled gate driver for the upper MOSFET. It is also monitored by the adaptive shoot-through protection circuitry to determine when the upper MOSFET can be turned on. The sourcing Rds(on) is 15Ω and the sink Rds(on) is 7Ω. Ugate can handle high voltage up to maximum 20V. 3 Gnd This pin represents the signal and power ground for the IC. Tie this pin to the ground island/plane through the lowest impedance connection available. 4 Lgate This pin provides the PWM controlled gate drive for the lower MOSFET. This pin is also monitored by the adaptive shoot-through protection circuitry to determine when the lower MOSFET can be turned on. 5 Vcc This pin provides the bias supply for the TS3405, as well as the lower MOSFET’s gate. Connect a well-decoupled 5V supply to this pin. 6 FB This pin is the inverting input of the internal error amplifier. Use this pin in combination with the COMP Pin to compensate the voltage-control feedback loop of the converter. 7 COMP During soft start and all the time during normal converter operation, this pin represents the output of the error amplifier. Use this pin in combination with the FB pin to compensate the voltage control feedback loop of the converter. Pulling COMP to a level below 0.3V enables soft start process. The whole soft start process takes about 5mS. 8 Phase This pin is used to monitor the voltage drop across the lower MOSFET for over current protection. The OCP threshold is –30mV. If Phases is less thean –300mV, the upper MOSFET cannot be turned-on in the next cycle. Block Diagram TS3405 2-10 2003/12 rev. A |
同様の部品番号 - TS3404_1 |
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同様の説明 - TS3404_1 |
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