NXP Semiconductors
SSL21081T/2T/3T/4T
GreenChip drivers for LED lighting
19. Contents
1
2
3
4
5
5.1
6
7
7.1
7.2
8
8.1
8.2
8.3
8.4
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5
8.4.6
8.4.7
8.5
8.6
8.7
8.8
8.8.1
8.9
9
10
11
12
13
14
15
16
17
17.1
17.2
17.3
17.4
18
19
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Quick reference data . . . . . . . . . . . . . . . . . . . . . 3
Ordering information . . . . . . . . . . . . . . . . . . . . . 3
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 4
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pinning information . . . . . . . . . . . . . . . . . . . . . . 5
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
Functional description . . . . . . . . . . . . . . . . . . . 6
Converter operation . . . . . . . . . . . . . . . . . . . . . 6
Conversion frequency. . . . . . . . . . . . . . . . . . . . 6
Valley detection. . . . . . . . . . . . . . . . . . . . . . . . . 6
Protective features . . . . . . . . . . . . . . . . . . . . . . 7
UnderVoltage LockOut (UVLO) . . . . . . . . . . . . 8
Leading-Edge Blanking (LEB) . . . . . . . . . . . . . 8
OverCurrent Protection (OCP) . . . . . . . . . . . . . 8
OverTemperature Protection (OTP) . . . . . . . . . 8
Brownout protection . . . . . . . . . . . . . . . . . . . . . 8
Short-Winding Protection (SWP) . . . . . . . . . . . 8
Output Short Protection (OSP) . . . . . . . . . . . . . 9
VCC supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DVDT supply . . . . . . . . . . . . . . . . . . . . . . . . . . 9
VCC regulator . . . . . . . . . . . . . . . . . . . . . . . . . . 9
NTC functionality and PWM dimming . . . . . . . 10
Soft-start function . . . . . . . . . . . . . . . . . . . . . . 10
Heat sink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 12
Thermal characteristics . . . . . . . . . . . . . . . . . 13
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 13
SSL2108X buck configuration . . . . . . . . . . . . 16
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 17
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 19
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 20
Legal information. . . . . . . . . . . . . . . . . . . . . . . 21
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 21
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Contact information. . . . . . . . . . . . . . . . . . . . . 22
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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. 2012.
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: 22 February 2012
Document identifier: SSL21081T_2T_3T_4T
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