MAX16805 Datasheet, PDF (8/19 Pages) Maxim Integrated Products – EEPROM-Programmable, High-Voltage, 350mA LED Drivers with LED Current Foldback

EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
PIN
MAX16805
MAX16806
1, 20
1, 20
2, 3
2, 3
4
5
6
7
8, 10, 16
9, 11, 18
12, 15
13
14
17
19
—
—
—
EP
4
5
—
—
8, 10,16
9, 18
12, 15
13
14
17
19
11
6
7
EP
Pin Description
NAME
OUT
IN
CFD
DGND
SCL
SDA
GND
N.C.
V5
CS+
CS-
DIM
EN
SW
TFP/SCL
TFN/SDA
EP
FUNCTION
Current Regulated Output. Connect pins 1 and 20.
Input Supply. Bypass IN with a 0.1µF (min) capacitor to GND. Connect pins 2
and 3.
LED Current Foldback Dimming Enable Input. Leave CFD unconnected to
enable the current foldback dimming function. Drive CFD low to disable the LED
current foldback dimming function.
Digital Ground. Connect to GND.
I²C Serial Clock Input
I²C Serial-Data Input/Output
Ground
No Connection. Leave unconnected (internal connection).
5V Regulated Output. Connect a 0.1µF capacitor from V5 to GND. Connect pin
12 to 15.
Positive Input of the Internal Differential Amplifier. Connect the current-sense
resistor between CS+ and CS- to program the output current level.
Negative Input of the Internal Differential Amplifier. Connect the current-sense
resistor between CS- and CS+ to program the output current level.
Dimming Input. See the Dimming Input (DIM) section.
Enable Input. Drive EN high to enable the output and the 5V regulator.
Momentary Switch Interface. See the Momentary Switch Interface (SW) section.
Thermal Foldback Positive Input/I²C Serial Clock Input. See the Thermal Sensor
Inputs/I²C Interface (TFP/SCL and TFN/SDA) section.
Thermal Foldback Negative Input/I²C Serial-Data Input/Output. See the Thermal
Sensor Inputs/I²C Interface (TFP/SCL and TFN/SDA) section.
Exposed Pad. Connect to the ground plane for improved power dissipation. Do
not use as a ground connection for the part.
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