NXP Semiconductors
TEA1751T; TEA1751LT
GreenChip III SMPS control IC
?NXP B.V.  2009.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 23 December 2009
Document identifier: TEA1751T_LT_2
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section Legal information.
16. Contents
1
General description . . . . . . . . . . . . . . . . . . . . . . 1
2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.1
Distinctive features . . . . . . . . . . . . . . . . . . . . . . 1
2.2
Green features . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.3
PFC green features . . . . . . . . . . . . . . . . . . . . . 2
2.4
Flyback green features . . . . . . . . . . . . . . . . . . . 2
2.5
Protection features . . . . . . . . . . . . . . . . . . . . . . 2
3
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4
Ordering information. . . . . . . . . . . . . . . . . . . . . 2
5
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6
Pinning information. . . . . . . . . . . . . . . . . . . . . . 4
6.1
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
7
Functional description . . . . . . . . . . . . . . . . . . . 5
7.1
General control. . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1.1
Start-up and UnderVoltage LockOut
(UVLO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1.2
Supply management. . . . . . . . . . . . . . . . . . . . . 7
7.1.3
Latch input . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1.4
Fast latch reset. . . . . . . . . . . . . . . . . . . . . . . . . 8
7.1.5
Overtemperature protection . . . . . . . . . . . . . . . 8
7.2
Power factor correction circuit . . . . . . . . . . . . . 8
7.2.1
t
on
 control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.2.2
Valley switching and demagnetization
(PFCAUX pin). . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.2.3
Frequency limitation . . . . . . . . . . . . . . . . . . . . . 9
7.2.4
Mains voltage compensation
(VINSENSE pin) . . . . . . . . . . . . . . . . . . . . . . . . 9
7.2.5
Soft start-up (pin PFCSENSE) . . . . . . . . . . . . . 9
7.2.6
Low power mode . . . . . . . . . . . . . . . . . . . . . . 10
7.2.7
Dual boost PFC . . . . . . . . . . . . . . . . . . . . . . . 10
7.2.8
Overcurrent protection (PFCSENSE pin) . . . . 11
7.2.9
Mains undervoltage lockout / brownout
protection (VINSENSE pin) . . . . . . . . . . . . . . 11
7.2.10
Overvoltage protection (VOSENSE pin). . . . . 11
7.2.11
PFC open loop protection (VOSENSE pin) . . 11
7.2.12
Driver (pin PFCDRIVER) . . . . . . . . . . . . . . . . 11
7.3
Flyback controller . . . . . . . . . . . . . . . . . . . . . . 12
7.3.1
Multimode operation. . . . . . . . . . . . . . . . . . . . 12
7.3.2
Valley switching (HV pin) . . . . . . . . . . . . . . . . 13
7.3.3
Current mode control (FBSENSE pin) . . . . . . 14
7.3.4
Demagnetization (FBAUX pin) . . . . . . . . . . . . 15
7.3.5
Flyback control / time-out (FBCTRL pin) . . . . 15
7.3.6
Soft start-up (pin FBSENSE) . . . . . . . . . . . . . 17
7.3.7
Maximum on-time. . . . . . . . . . . . . . . . . . . . . . 17
7.3.8
Overvoltage protection (FBAUX pin) . . . . . . . 17
7.3.9
Overcurrent protection (FBSENSE pin) . . . . . 18
7.3.10
Overpower protection. . . . . . . . . . . . . . . . . . . 18
7.3.11
Driver (pin FBDRIVER) . . . . . . . . . . . . . . . . . 19
8
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 19
9
Thermal characteristics . . . . . . . . . . . . . . . . . 20
10
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 20
11
Application information . . . . . . . . . . . . . . . . . 25
12
Package outline. . . . . . . . . . . . . . . . . . . . . . . . 26
13
Revision history . . . . . . . . . . . . . . . . . . . . . . . 27
14
Legal information . . . . . . . . . . . . . . . . . . . . . . 28
14.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 28
14.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
14.3
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 28
14.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 28
15
Contact information . . . . . . . . . . . . . . . . . . . . 28
16
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
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