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UBA2071ATS Datasheet(PDF) 35 Page - NXP Semiconductors

Part # UBA2071ATS
Description  Half bridge control IC for CCFL backlighting
PDF  35 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

UBA2071ATS Datasheet(HTML) 35 Page - NXP Semiconductors

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NXP Semiconductors
UBA2071; UBA2071A
Half bridge control IC for CCFL backlighting
© NXP B.V. 2008.
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 June 2008
Document identifier: UBA2071_A_1
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
17. Contents
1
General description . . . . . . . . . . . . . . . . . . . . . . 1
2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4
Quick reference data . . . . . . . . . . . . . . . . . . . . . 2
5
Ordering information . . . . . . . . . . . . . . . . . . . . . 3
6
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4
7
Pinning information . . . . . . . . . . . . . . . . . . . . . . 5
7.1
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
8
Functional description . . . . . . . . . . . . . . . . . . . 6
8.1
Supply, Start-up and UnderVoltage LockOut
(UVLO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8.2
VDD clamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.3
Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.4
The oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.5
Non-overlap . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.6
Low-side and high-side drivers . . . . . . . . . . . . . 9
8.7
DC blocking capacitor charging . . . . . . . . . . . . 9
8.8
Lamp (re-)ignition . . . . . . . . . . . . . . . . . . . . . . 11
8.9
Overvoltage control. . . . . . . . . . . . . . . . . . . . . 13
8.10
Lamp current control. . . . . . . . . . . . . . . . . . . . 14
8.11
PWM dimming . . . . . . . . . . . . . . . . . . . . . . . . 15
8.12
The fault timer . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.13
Communication. . . . . . . . . . . . . . . . . . . . . . . . 18
8.14
Protections . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.14.1
Voltage feedback open or short protection . . . 19
8.14.2
Overvoltage protection . . . . . . . . . . . . . . . . . . 20
8.14.3
Hard switching protection . . . . . . . . . . . . . . . . 20
8.14.4
Overvoltage extra protection. . . . . . . . . . . . . . 20
8.14.5
Current feedback open or short protection . . . 21
8.14.6
Overcurrent detection . . . . . . . . . . . . . . . . . . . 21
8.14.7
Arcing detection . . . . . . . . . . . . . . . . . . . . . . . 21
8.14.8
Ignition Failure (IF) . . . . . . . . . . . . . . . . . . . . . 22
8.14.9
The NONFAULT pin . . . . . . . . . . . . . . . . . . . . 22
8.14.10
Fault input via the COMM pin . . . . . . . . . . . . . 23
9
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 23
10
Thermal characteristics. . . . . . . . . . . . . . . . . . 24
11
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 24
12
Application information. . . . . . . . . . . . . . . . . . 28
13
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 31
14
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 33
15
Legal information. . . . . . . . . . . . . . . . . . . . . . . 34
15.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 34
15.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
15.3
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
15.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 34
16
Contact information . . . . . . . . . . . . . . . . . . . . 34
17
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35



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