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TPS2830D データシート(PDF) 2 Page - Texas Instruments |
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TPS2830D データシート(HTML) 2 Page - Texas Instruments |
2 / 15 page TPS2830, TPS2831 FAST SYNCHRONOUS-BUCK MOSFET DRIVERS WITH DEADTIME CONTROL SLVS196B – JANUARY1999 – REVISED SEPTEMBER 1999 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 functional block diagram DT 6 IN VCC LOWDR BOOTLO HIGHDR BOOT PGND 2 8 14 12 11 10 VCC 7 ENABLE 1 SYNC 5 CROWBAR 3 (TPS2830 Only) (TPS2831 Only) Terminal Functions TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION BOOT 14 I Bootstrap terminal. A ceramic capacitor is connected between BOOT and BOOTLO terminals to develop the floating bootstrap voltage for the high-side MOSFET. The capacitor value is typically between 0.1 µF and 1 µF. A 1-MΩ resistor should be connected across the bootstrap capacitor to provide a discharge path when the driver has been powered down. BOOTLO 11 O This terminal connects to the junction of the high-side and low-side MOSFETs. CROWBAR 3 I CROWBAR can to be driven by an external OVP circuit to protect against a short across the high-side MOSFET. If CROWBAR is driven low, the low-side driver will be turned on and the high-side driver will be turned off, independent of the status of all other control terminals. DT 6 I Deadtime control terminal. Connect DT to the junction of the high-side and low-side MOSFETs. ENABLE 1 I If ENABLE is low, both drivers are off. HIGHDR 12 O Output drive for the high-side power MOSFET IN 2 I Input signal to the MOSFET drivers (noninverting input for the TPS2830; inverting input for the TPS2831). LOWDR 10 O Output drive for the low-side power MOSFET NC 4, 9, 13 PGND 7 Power ground. Connect to the FET power ground SYNC 5 I Synchronous Rectifier Enable terminal. If SYNC is low, the low-side driver is always off; If SYNC is high, the low-side driver provides gate drive to the low-side MOSFET. VCC 8 I Input supply. Recommended that a 1- µF capacitor be connected from VCC to PGND. |
同様の部品番号 - TPS2830D |
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同様の説明 - TPS2830D |
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