NXP Semiconductors UM10468 User manual

UM10468
SSL2108X buck evaluation board
Rev. 1 — 30 August 2011 User manual
Document information
Info Content
Keywords SSL2108X, Buck, down converter, AC/DC converter, retrofit SSL, LED
driver, LED retrofit lamp, non-dimmable
Abstract The SSL2108X is a range of high-voltage Integrated Circuits (ICs),
intended to drive non-dimmable retrofit LED lamps in general lighting
applications. This document describes the evaluation board for mains
operated non-dimmable LED drivers using the SSL21081, SSL21082,
SSL21083 and SSL21084 controller ICs.
Refer to the SSL2108X data sheet for details on the SSL2108X device
and application note AN11041 for general application information.

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User manual Rev. 1 — 30 August 2011 2 of 27
Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
NXP Semiconductors UM10468
SSL2108X buck evaluation board
Revision history
Rev Date Description
v.1 20110830 first issue

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NXP Semiconductors UM10468
SSL2108X buck evaluation board
1. Introduction
The SSL2108X is a family of high-voltage Integrated Circuits (IC), designed to drive
non-dimmable retrofit LED lamps in general lighting applications. The product family
consists of four ICs with different configurations which are shown in Table 1.
[1] SO12 package variants have more fused leads for lower thermal resistance and can be used when a higher
output power is needed.
Main benefits of the product family are:
•Small Printed-Circuit Board (PCB) footprint providing a compact solution
•High-efficiency (up to 95 %)
•Ease of integration
•Low electronic Bill Of Material (BOM)
The SSL2108X provides accurate output control with more than 5 % LED current
accuracy. The ICs can operate using Pulse-Width Modulation (PWM) dimming and have
many protection features including easy external temperature feedback.
The SSL2108X driver family is the high performance solution for the next generation of
retrofit LED lamps. These ICs provide a high efficiency, high-power factor solution in a
small form factor.
Remark: Unless otherwise stated all voltages are in V (DC).
WARNING
Lethal voltage and fire ignition hazard
The non-insulated high voltages that are present when operating this product, constitute a
risk of electric shock, personal injury, death and/or ignition of fire.
This product is intended for evaluation purposes only. It shall be operated in a designated test
area by personnel qualified according to local requirements and labor laws to work with
non-insulated mains voltages and high-voltage circuits. This product shall never be operated
unattended.
Table 1. SSL2108X type number overview
Type Package Vmains range
(V (AC)) Internal MOSFET characteristics Adjustable brownout protection
SSL21081 SO8 100 to 120 300 V; 2 no
SSL21082 SO12[1] yes
SSL21083 SO8 100 to 230 600 V; 5 no
SSL21084 SO12[1] yes

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User manual Rev. 1 — 30 August 2011 4 of 27
NXP Semiconductors UM10468
SSL2108X buck evaluation board
2. Safety warning
This reference board is connected to a high AC voltage (up to 250 V). Avoid touching the
demo board during operation. An isolated housing is obligatory when used in
uncontrolled, non-laboratory environments. Galvanic isolation of the mains phase using a
fixed or variable transformer (Variac) is always recommended. These devices are
recognized by the symbols shown in Figure 1
3. Specification
[1] Refer to Section 5 for more detailed information.
a. Isolated b. Not isolated
Fig 1. Variac isolation symbols
019aab173
019aab174
Table 2. Specifications for the reference board
Parameter Value Comment
AC line input voltage
SSL21081 and SSL21082 85 V (AC) to 138 V (AC) optimized for 100 V (AC)
SSL21083 and SSL21084 230 V (AC) optimized for 100 V (AC)
Output voltage (VLED)
SSL21081 and SSL21082 20 V to 70 V optimized for 60 V
SSL21083 and SSL21084 20 V to 140 V optimized for 120 V
Output current (ILED)
SSL21081 95 mA, 70 mA, 38 mA adjust using jumpers J7A, J8A, J9A
SSL21082 160 mA, 125 mA, 105 mA adjust using jumpers J7A, J8A, J9A
SSL21083 55 mA, 35 mA, 18 mA adjust using jumpers J7A, J8A, J9A
SSL21084 80 mA, 69 mA, 53 mA adjust using jumpers J7A, J8A, J9A
Maximum LED output power (Po(LED))
SSL21081 and SSL21083 6 W optimized for 6 W using dedicated loads[1]
SSL21082 and SSL21084 15 W optimized for 10 W using dedicated loads[1]
Switching frequency
Nominal switching frequency
(fsw(nom))100 kHz -
Board dimension (L WH)
SSL21081,SSL21082,SSL21083
and SSL21084 70 mm 60 mm 23 mm maximum footprint
Temperature
Operating temperature 40 Cto+100C-

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User manual Rev. 1 — 30 August 2011 5 of 27
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SSL2108X buck evaluation board
4. Performance data
4.1 Output load
4.2 Efficiency Curve
Fig 2. SSL21081 load curve: Ioas a function of Vo
60
80
40
100
120
l
o
(mA)
20
V
o
(V)
0 1008040 6020
019aac361
Fig 3. SSL21081: Efficiency () as a function of output power (Po)
84
90
88
86
92
η
(%)
Po (W)
08624
019aac362

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User manual Rev. 1 — 30 August 2011 6 of 27
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SSL2108X buck evaluation board
4.3 Input voltage dependency
4.4 ElectroMagnetic Compatibility data
Fig 4. SSL21081 input voltage dependency: Ioas a function of Vmains = VIN
40
80
120
l
o
(mA)
0
V
mains
(V)
40 14012080 10060
019aac363
(1) Peak values.
(2) Average values.
Fig 5. SSL21081 EMC measurement L-phase according to FCC15 norm
019aac364
(1)
(2)

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SSL2108X buck evaluation board
(1) Peak values.
(2) Average values.
Fig 6. SSL21081 EMC measurement N-phase according to FCC15 norm
(1) Peak values.
(2) Average values.
Fig 7. SSL21083 EMC measurement L-phase according to EN55015 norm
019aac365
(1)
(2)

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User manual Rev. 1 — 30 August 2011 8 of 27
NXP Semiconductors UM10468
SSL2108X buck evaluation board
(1) Peak values.
(2) Average values.
Fig 8. SSL21083 EMC measurement N-phase according to EN55015 norm

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User manual Rev. 1 — 30 August 2011 9 of 27
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SSL2108X buck evaluation board
4.5 SSL21081 mains harmonics
Table 3. SSL21081 mains conducted harmonics
Line Percent (%) Class-C Except Line Percent (%) Class-C Except
1 100 100 100 21 5.9 3 undefined
2 0 2 undefined 22 0 2 undefined
3 84.7 30 86 23 4.4 3 undefined
4 0 2 undefined 24 0.4 2 undefined
5 59.8 10 61 25 3.8 3 undefined
6 0 2 undefined 26 0.4 2 undefined
7 34.1 7 undefined 27 3.6 3 undefined
8 0 2 undefined 28 0 2 undefined
9 17.9 5 undefined 29 3.2 3 undefined
10 0 2 undefined 30 0 2 undefined
11 15.4 3 undefined 31 2.2 3 undefined
12 0 2 undefined 32 0.2 2 undefined
13 13.9 3 undefined 33 2.2 3 undefined
14 0 2 undefined 34 0.2 2 undefined
15 9.7 3 undefined 35 2 3 undefined
16 4.5 2 undefined 36 0.4 2 undefined
17 7 3 undefined 37 1.9 3 undefined
18 0.6 2 undefined 38 0 2 undefined
19 6.8 3 undefined 39 1.4 3 undefined
20 0.3 2 undefined 40 0 2 undefined
(1) Input voltage VIN.
(2) Input current II.
Fig 9. VIN and IIfor a 100 V; 60 Hz AC mains supply
019aac366
(1)
(2)

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SSL2108X buck evaluation board
(1) Drain voltage VDRAIN.
(2) Source voltage VSOURCE.
Fig 10. VDRAIN and VSOURCE typical waveforms
019aac367
(1)
(2)