MAX16841_13 Datasheet, PDF (5/18 Pages) Maxim Integrated Products – Controller IC for Dimmable Offline LED Lamps

MAX16841
Controller IC for Dimmable Offline LED Lamps
Pin Configuration
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+
REFI 1
COMP 2
MAX16841
TH 3
DIMOUT 4
SO
8 IN
7 NDRV
6 CS
5 GND
Pin Description
PIN
NAME
FUNCTION
1
REFI
Current Reference Input. The IC sources 50FA current out of this pin. Connect a resistor from REFI to
GND to set the input-current reference.
2
COMP
Compensation Component Connection for the Switching Stage. Connect a suitable RC network to
ground. This is the output of the G_m amplifier.
3
TH
Sets the Voltage Threshold on the Input at Which Switching Starts. This threshold is set at 1.24V.
Connect a resistor-divider from the bridge rectifier output, TH, and GND.
DIMOUT Drives an External FET to Provide a Resistive Path for the Triac when Input is Low. DIMOUT is
4
DIMOUT also used to drive an external FET that sets the programmed current to zero when the input voltage is
low.
5
GND Ground
6
CS
Switch Current-Sense Input
7
NDRV
Gate Drive for the Switching MOSFET. Connect a resistor across NDRV and GND to set the
switching frequency.
8
IN
Input. Bypass with a 0.1FF or a higher value ceramic capacitor to ground.
Maxim Integrated
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