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TEA1791AT Datasheet

GreenChip synchronous rectifier controller

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TEA1791AT
GreenChip synchronous rectifier controller
Rev. 01 — 7 June 2010
Product data sheet
1. General description
The TEA1791AT is a member of the new generation of Synchronous Rectifier (SR)
controller ICs for switched mode power supplies. Its high level of integration allows the
design of a cost-effective power supply with a very low number of external components.
The TEA1791AT is a controller IC dedicated for synchronous rectification on the
secondary side of discontinuous conduction mode and quasi-resonant flyback converters.
The TEA1791AT is fabricated in a Silicon On Insulator (SOI) process.
2. Features and benefits
2.1 Distinctive features
„ Accurate synchronous rectification functionality
„ Wide supply voltage range (8.5 V to 38 V)
„ High level of integration, resulting in a very low external component count
„ High driver output voltage of 10 V to drive all MOSFET brands to the lowest RDSon
2.2 Green features
„ Low current consumption
„ High system efficiency from no load to full load
2.3 Protection features
„ Undervoltage protection
3. Applications
„ The TEA1791AT is intended for adapters. The device can also be used in all other
discontinuous conduction mode systems and quasi-resonant flyback systems that
demand a highly efficient and cost-effective solution.
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
TEA1791AT/N1 SO8
plastic small outline package; 8 leads; body width 3.9 mm
Version
SOT96-1


NXP Semiconductors Electronic Components Datasheet

TEA1791AT Datasheet

GreenChip synchronous rectifier controller

No Preview Available !

NXP Semiconductors
5. Block diagram
TEA1791AT
GreenChip synchronous rectifier controller
1
SRSENSE
control
DRIVER 4
TIMER
0.93 μs
0.99 μs
QR
QS
VCC
8
310 mV
12 mV
55 mV
3, 5, 6, 7
n.c.
2
GND
Fig 1. Block diagram
6. Pinning information
6.1 Pinning
014aaa893
SRSENSE 1
GND 2
n.c. 3
DRIVER 4
8 VCC
7 n.c.
TEA1791AT
6 n.c.
5 n.c.
014aaa894
Fig 2. Pin configuration
6.2 Pin description
Table 2. Pin description
Symbol
Pin
SRSENSE
1
GND
2
n.c.
3
DRIVER
4
n.c
5
n.c.
6
n.c.
7
VCC
8
Description
synchronous timing input
ground
not connected
driver output for SR MOSFET
not connected
not connected
not connected
supply voltage
TEA1791AT
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 01 — 7 June 2010
© NXP B.V. 2010. All rights reserved.
2 of 13


Part Number TEA1791AT
Description GreenChip synchronous rectifier controller
Maker NXP
Total Page 3 Pages
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