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TPS92023 Folha de dados(PDF) 6 Page - Texas Instruments |
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TPS92023 Folha de dados(HTML) 6 Page - Texas Instruments |
6 / 23 page DT 1 2 3 4 RT OC SS GD1 VCC GND GD2 8 7 6 5 TPS92023 SLUSBH3 – JUNE 2013 www.ti.com DEVICE INFORMATION TPS92023 (Top View) TERMINAL FUNCTIONS TERMINAL DESCRIPTION NAME NO. I/O Sets the dead time of high-side and low-side switch driving signals. Connect a resistor to ground. With internal 2.25-V voltage reference, the current flowing through the resistor sets the dead time. To prevent shoot through DT 1 I when this pin is accidentally short to ground, the minimum dead time is set to 120 ns. Any dead time setting less than 120 ns defaults to 120-ns dead time. GD1 8 O High-side and low-side switch gate driver. Connect gate driver transformer primary side to these two pins to drive the half bridge. GD2 5 O GND 6 - Ground. Overcurrent protection. When the voltage on this pin is above 1 V, gate driver signals are actively pulled low. OC 3 I After the voltage falls below 0.6 V, the gate driver signal recovers with soft start. When OC pin voltage is above 2 V, the device is latched off. Bringing VCC below UVLO level resets the overcurrent latch off. The current flowing out of this pin sets the frequency of the gate driver signals. Connect the opto-coupler collector to this pin to control the switching frequency for regulation purpose. Parallel a resistor to ground to RT 2 I set the minimum current flowing out of the pin and set the minimum switching frequency. To set the maximum switching frequency limiting, place a resistor in series with the opto-coupler transistor. This resistor sets the maximum current flowing out of the pin and limits the maximum switching frequency. Soft-start. This pin sets the soft-start time of the system. Connect a capacitor to ground. Pulling this pin below SS 4 I 1 V disables the device to allow easy ON/OFF control. The soft-start function is enabled after all fault conditions, including bias supply OV, UVLO, overcurrent protection and over-temperature protection. Bias supply. Connect this pin to a power supply less than 20 V. Place a 1- μF capacitor in parallel to ground to VCC 7 - filter out noise. 6 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: TPS92023 |
Nº de peça semelhante - TPS92023 |
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Descrição semelhante - TPS92023 |
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