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TEA1995T 데이터시트 PDF




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부품번호 TEA1995T 기능
기능 GreenChip dual synchronous rectifier controller
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TEA1995T 데이터시트, 핀배열, 회로
TEA1995T
GreenChip dual synchronous rectifier controller
Rev. 1 — 30 July 2015
Product data sheet
1. General description
The TEA1995T is the first product of a new generation of Synchronous Rectifier (SR)
controller ICs for switched mode power supplies. It incorporates an adaptive gate drive
method for maximum efficiency at any load.
The TEA1995T is a dedicated controller IC for synchronous rectification on the secondary
side of resonant converters. It has two driver stages for driving the SR MOSFETs, which
rectify the outputs of the central tap secondary transformer windings. The two gate driver
stages have their own sensing inputs and operate independently.
The TEA1995T can also be used in multi-output flyback converters with the SR MOSFET
placed at the low side.
The TEA1995T is fabricated in a Silicon-On-Insulator (SOI) process.
2. Features and benefits
2.1 Efficiency features
Adaptive gate drive for maximum efficiency at any load
Supply current in energy save operation below 200 A
2.2 Application features
Wide supply voltage range from 4.5 V to 38 V
Dual synchronous rectification for LLC resonant in SO8 package
Synchronous rectification for multi-output flyback converters
Supports 5 V operation with logic level SR MOSFETs
Differential inputs for sensing the drain and source voltages of each SR MOSFET
2.3 Control features
SR control without minimum on-time
Adaptive gate drive for fast turn-off at the end of conduction
UnderVoltage LockOut (UVLO) protection with active gate pull-down




TEA1995T pdf, 반도체, 판매, 대치품
NXP Semiconductors
6. Pinning information
6.1 Pinning
TEA1995T
GreenChip dual synchronous rectifier controller
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Fig 2. TEA1995T pin configuration (SO8)
6.2 Pin description
Table 2.
Symbol
GDB
GND
DSB
SSB
SSA
DSA
VCC
GDA
Pin description
Pin
1
2
3
4
5
6
7
8
Description
gate drive output MOSFET B
ground
drain sense input for synchronous timing MOSFET B
source sense input MOSFET B
source sense input MOSFET A
drain sense input for synchronous timing MOSFET A
supply voltage
gate drive output MOSFET A
TEA1995T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 30 July 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
4 of 17

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TEA1995T 전자부품, 판매, 대치품
NXP Semiconductors
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TEA1995T
GreenChip dual synchronous rectifier controller
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Fig 4. Synchronous rectification signals
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7.5 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 and logic level SR MOSFETs can be used.
During start-up conditions (VCC < Vstart) and UVLO, the driver output voltage is actively
pulled low.
TEA1995T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 30 July 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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TEA1995T

GreenChip dual synchronous rectifier controller

NXP Semiconductors
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