データシートサーチシステム |
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UC1875 データシート(PDF) 9 Page - Texas Instruments |
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UC1875 データシート(HTML) 9 Page - Texas Instruments |
9 / 19 page 9 UC1875/6/7/8 UC2875/6/7/8 UC3875/6/7/8 In each of the output stages, transistors Q3 through Q6 form a high-speed totem-pole driver which will source or sink more than one amp peak with a total delay of approximately 30 nanoseconds. To ensure a low output level prior to turn-on, transistors Q7 through Q9 form a self-biased driver to hold Q6 on prior to the supply reaching its turn-on threshold. This circuit is operable when the chip supply is zero. Q6 is also turned on and held low with a signal from the fault logic portion of the chip. APPLICATION INFORMATION (cont.) Delay Blocks And Output Stages The delay providing the dead-time is accomplished with C1 which must discharge to VTH before the output can go high. The time is defined by the current sources, I1, which is programmed by an external resistor, RTD. The voltage on the Delay Set pins is internally regulated to 2.5V and the range of dead time control is from 50 to 200 nanoseconds. NOTE: There is no way to disable the delay circuitry, and the delay time must be programmed. The four outputs of the UC1875/6/7/8 interface to the full bridge converter switches as shown below: Output Switch Orientation UDG-95083 UDG-95082 3 Winding Bifilar, AWG 30 Kynar Insulation |
同様の部品番号 - UC1875 |
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同様の説明 - UC1875 |
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