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TEA2095TE データシート(PDF) 8 Page - NXP Semiconductors

部品番号. TEA2095TE
部品情報  GreenChip dual synchronous rectifier controller
ダウンロード  19 Pages
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メーカー  NXP [NXP Semiconductors]
ホームページ  http://www.nxp.com
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TEA2095TE Datasheet(HTML) 8 Page - NXP Semiconductors

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NXP Semiconductors
TEA2095TE
GreenChip dual synchronous rectifier controller
TEA2095TE
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
8 / 19
8.6 Source sense connection (SSA and SSB pins)
The IC is equipped with additional source sense pins (SSA and SSB). These pins are
used for the measurement of the SR MOSFET drain-to-source voltage. The source
sense input must be connected as close as possible to the source pin of the external SR
MOSFET. It minimizes errors caused by voltage difference on PCB tracks because of
parasitic inductance in combination with large dI/dt values.
8.7 Interlock function
The TEA2095TE incorporates an interlock function. The interlock function avoids the
turn-on of both gate driver outputs at the same time.
After turn-off of one gate driver output, the IC waits typically 200 ns (td(interlock)) before
turning on the other gate driver output.
8.8 Discharge function
Disconnecting a power supply from the mains voltage should lead to zero output voltage
and the power indicator turn-off. The TEA2095TE contains a discharge function that
automatically discharges the output capacitor after a mains disconnect.
The detection of the mains disconnect happens by monitoring the activity of the
synchronous rectification and applying a 1.4 s threshold for discriminating between no-
load operation and power disconnect.
The discharge function creates a rapid discharging with a constant power dissipation of
0.4 W. Figure 5 shows the secondary current, the drain sense voltage, the gate driver
voltage, and the supply current.
The TEA2095TE enters the energy save mode 110 μs after the last SR cycle. The supply
current changes to a very low level of 90 μA for low no-load power. After 1.4 seconds
without SR activity, the TEA2095TE makes a transition to the discharge mode and draws
a current of 0.4 W divided by the VCC voltage.
For a VCC voltage below UVLO, the discharge current reduces gradually to a level of
8 mA at 1 V VCCvoltage.
The discharge function remains active in the UVLO state. When the increasing VCC
voltage exceeds the start level, the discharge current switches off.


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