UM10468
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© NXP B.V. 2011. All rights reserved.
User manual
Rev. 1 — 30 August 2011
11 of 27
NXP Semiconductors
UM10468
SSL2108X buck evaluation board
5. Connection
data
The evaluation board operates from either:
•
SSL21081 and SSL21082: 100 V (AC) to 120 V (AC) mains supply voltage
•
SSL21083 and SSL21084: 230 V (AC) mains supply voltage
The evaluation board is designed to work with an LED module with an operating voltage
of:
•
SSL21081 and SSL21082: 60 V
•
SSL21083 and SSL21084: 120 V
Loads consisting of multiple high-power LEDs in series with similar operating voltages can
also be used. A dedicated SHARP GW5BDQ27KK3 LED load for connecting to connector
K2A is available on request. Other loads can be connected to either connector K2A or K3.
When attaching an LED load to a board under power (hot plugging), an inrush peak
current occurs due to discharge of capacitor C3. After several discharges, the LEDs will
deteriorate or become damaged.
Jumper settings J1A to J6A shown in
set the package-specific circuitry to enable
each device to function correctly.
5.1 The board connections
When connecting the evaluation board consider the following:
•
Place a galvanic isolated transformer between the AC source and the evaluation
board connector K1A, if used.
•
Connect a user-defined LED module to connector K2A or K3. Ensure that the anode
of the LED module is connected to one of the positive LED terminals.
•
Connector K4 can be used:
–
to connect an external NTC resistance. Remove the pre-soldered NTC RT1 (see
–
to use a PWM dimming signal to the converter (see
Table 4.
SSL2108X jumper settings overview
IC
Package
Jumper settings
J1A
J2A
J3A
J4A
J5A
J6A
SSL21081
SO8
no
yes
no
yes
no
yes
SSL21083
SSL21082
SO12
yes
no
yes
no
yes
no
SSL21084
