Ag210 Evaluation Board User Manual
5.6 Output Current Selection
The EvalAg210 is set to a constant current output of 300mA by default. To adjust the
power up to the maximum constant current output of 1000mA a resistance can be
installed between Vin- and LED- pins. Pads for R15 & R16 are provided to install the
appropriate resistors as per the table below. Installing resistors with an effective series
resistance of less than 0.713 may cause damage to the Ag210.
Iout CSxa Value (Ohms)* CSxb Value (Ohms)*
300mA Not Fitted Not Fitted
Increase the constant output current, connect CSx between LED- and VIN-
* We would recommend a low temerature coeffient resistor with a package size of 1206, for the appropriate power
dissipation.
5.7 Auxiliary Voltage adjust
The Ag210 has an auxiliary DC voltage out for providing power to a control system. The
voltage level can be adjusted by placing a resistor between the VA and +Vout pins. The
header J7 on EvalAg210 allows the Ag210 to output either 12V, or 5V across JP5 &
JP6. However R13 can by populated to allow for a specified voltage, please contact
Silvertel for details.
With no jumper installed the output across the auxiliary supply will be 12V. Bridging pins
1&2 (C20 side) will result in an output of 5V. Bridging pins 2&3 (LED3 side) will result in
the custom set voltage across the output.
5.8 Dimming Control
The brightness control of the Ag210 LED driver can be controlled in several different
ways, using either the 0-10V DC voltage source, a Potentiometer or via an I2C
interface*. The EvalAg210 is setup to provide the latter two options.
With a jumper across LK1, the output power of the Ag210 will be controlled by the
potentiometer POT1.
With the jumper removed from LK1, the output power of the Ag210 will be controlled by
the I2C interface using the provided three pin header, J5. The pinouts on J5 are as
below. Pin 1: SCK Pin 2: SDA Pin 3: GND
*Please see section 6 of the datasheet for full explanation of the Ag210 dimming control.
