pca9922 NXP Semiconductors, pca9922 Datasheet - Page 26

• Manufacturer Part Number: pca9922
• Description: 8-channel Constant Current Led Driver With Output Error Detection
• Manufacturer: NXP Semiconductors

NXP Semiconductors
22. Contents
1
2
3
4
4.1
5
6
6.1
6.2
7
7.1
7.2
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
7.2.7
8
9
10
11
12
13
14
15
16
16.1
16.2
16.3
16.4
17
17.1
17.2
17.3
17.4
18
19
20
20.1
20.2
20.3
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information . . . . . . . . . . . . . . . . . . . . . . 4
Functional description . . . . . . . . . . . . . . . . . . . 6
Application design-in information . . . . . . . . . 12
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 13
Recommended operating conditions. . . . . . . 13
Thermal characteristics. . . . . . . . . . . . . . . . . . 13
Static characteristics. . . . . . . . . . . . . . . . . . . . 14
Dynamic characteristics . . . . . . . . . . . . . . . . . 15
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 18
Handling information. . . . . . . . . . . . . . . . . . . . 21
Soldering of SMD packages . . . . . . . . . . . . . . 21
Soldering of through-hole mount packages . 23
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 24
Legal information. . . . . . . . . . . . . . . . . . . . . . . 25
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 2
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
System interface . . . . . . . . . . . . . . . . . . . . . . . . 6
LED output error detection . . . . . . . . . . . . . . . . 7
Open-circuit detection principle . . . . . . . . . . . . 7
Short-circuit detection principle . . . . . . . . . . . . 8
Entering error detect mode . . . . . . . . . . . . . . . . 8
Setting the outputs to test . . . . . . . . . . . . . . . . . 9
Capturing the fault/output error data. . . . . . . . . 9
Exit error detect mode . . . . . . . . . . . . . . . . . . 10
Error detection data . . . . . . . . . . . . . . . . . . . . 10
Introduction to soldering . . . . . . . . . . . . . . . . . 21
Wave and reflow soldering . . . . . . . . . . . . . . . 21
Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 21
Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . 22
Introduction to soldering through-hole
mount packages . . . . . . . . . . . . . . . . . . . . . . . 23
Soldering by dipping or by solder wave . . . . . 23
Manual soldering . . . . . . . . . . . . . . . . . . . . . . 23
Package related soldering information . . . . . . 24
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 25
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8-channel constant current LED driver with output error detection
20.4
21
22
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2009.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [e-mail]
Contact information . . . . . . . . . . . . . . . . . . . . 25
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Date of release: 15 January 2009
Document identifier: PCA9922_1
PCA9922
All rights reserved.