PAM2861 Datasheet, PDF (2/12 Pages) Diodes Incorporated – 1A LED DRIVER WITH INTERNAL SWITCH

Typical Applications Circuit
A Product Line of
Diodes Incorporated
PAM2861
Pin Descriptions
Pin
Number
1
2
3
4
5
Pin
Name
LX
GND
VSET
ISENSE
VIN
Function
Drain of NDMOS switch.
Ground (0V)
• Multi-function On/Off and brightness control pin:
• Leave floating for normal operation.
• Drive to voltage below 0.2V to turn off output current
• Drive with DC voltage (0.3V < VSET< 2.5V) to adjust output current from 12% to 100% of I_OUTnom
• Drive with PWM signal from open-collector or open-drain transistor, to adjust output current. Adjustment range
1% to 100% of I_OUTnom for f < 500Hz
• Connect a capacitor from this pin to ground to increase soft-start time.
(Default soft-start time = 0.1ms. Additional soft-start time is approx.1.5ms/1nF)
Connect resistor RS from this pin to VIN to define nominal average output current
I_OUTnom = 0.1/Rs
Input voltage (6V to 40V). Decouple to ground with 10μF or higher X7R ceramic capacitor close to device.
PAM2861
Document number: DSxxxxx Rev. 1 - 1
2 of 12
www.diodes.com
July 2013
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