A Product Line of
Diodes Incorporated
PAM2841
1.5A SW CURRENT, 40V PRECISION WLED DRIVER
Description Pin Assignments
The PAM2841 is a white LED driver, capable of driving 10 or more
WLEDs in series (depending on forward voltage of the LEDs) with a
range of input voltages from 2.7V to 5.5V.
The PAM2841 features over current protection, over voltage
protection, under voltage lockout and over temperature protection,
which prevent the device from damage.
LED dimming can be done by four methods as described in the
Application Information hereinafter.
Features
Capable of Driving 10 or More WLEDs
Chip Enable with Soft-Start
Analog and PWM Dimming
Peak Efficiency up to 90%
Low Quiescent Current
Fixed Frequency of 1MHz
Over Current Protection
Over Voltage Protection
Thermal Protection
UVLO
Tiny Pb-Free Packages (RoHS Compliant):
MSOP-8 and DFN 2X2
Applications
WLED Driver System
Typical Applications Circuit
1 of 16 September 2013
PAM2841
Diodes Incorporated
www.diodes.com
Document number: DSxxxxx Rev. 1 - 5
A Product Line of
Diodes Incorporated
PAM2841
Typical Applications Circuit (cont.)
Pin Descriptions
Pin Pin
Function
Number Name
Power Ground
1 PGND
2 VIN Input Voltage
3 ENA Chip Enable, Active High
4 Comp Compensation Node
5 GND Chip Ground
Feedback
6 FB
Over Voltage
7 OVP
8 SW Drain of Main Switch
Functional Block Diagram
2 of 16 September 2013
PAM2841
Diodes Incorporated
www.diodes.com
Document number: DSxxxxx Rev. 1 - 5