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7 / 19 page NXP Semiconductors TEA2095T GreenChip dual synchronous rectifier controller TEA2095T All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved. Product data sheet Rev. 1.1 — 10 April 2020 7 / 19 aaa-018615 0 V 0 V 0 A Vthreshold SR switch low current high current secondary current drain sense- source sense voltage gate driver Vact(drv) td(act)(drv) Vreg(drv) Figure 4. Synchronous rectification signals 8.5 Gate driver (GDA and GDB pins) The gate driver circuit charges the gate of the external SR MOSFET during the rising part of the current. The driver circuit discharges the gate during the falling part of the current. The gate driver has a source capability of typically Isource and a sink capability of typically Isink. The source and sink capability allow a fast turn-on and a fast turn-off of the external SR MOSFET. The maximum driver output voltage is limited to VG(max). This high output voltage drives all MOSFET brands to the minimum on-state resistance. In applications where the IC is supplied with 5 V, the maximum output voltage of the driver is limited to 5 V. Logic level SR MOSFETs can be used. During start-up conditions (VCC < Vstart) and UVLO, the driver output voltage is actively pulled low. |
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