MAX16814BEUP+ Maxim Integrated Products, MAX16814BEUP+ Datasheet - Page 8

• Manufacturer Part Number: MAX16814BEUP+
• Description: LED Drivers Integrated 4-Channel High-Brightness LED
• Manufacturer: Maxim Integrated Products

Specifications of MAX16814BEUP+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Integrated, 4-Channel, High-Brightness LED
Driver with High-Voltage DC-DC Controller
8
TQFN
10
11
______________________________________________________________________________________
1
2
3
4
5
6
7
8
9
PIN
TSSOP
10
11
12
13
14
4
5
6
7
8
9
NAME
COMP
SGND
RSDT
OUT1
OVP
SETI
DIM
FLT
EN
RT
IN
Bias Supply Input. Connect a 4.75V to 40V supply to IN. Bypass IN to SGND with a ceramic
capacitor.
Enable Input. Connect EN to logic-low to shut down the device. Connect EN to logic-high or IN
for normal operation. The EN logic threshold is internally set to 1.23V.
Switching Converter Compensation Input. Connect the compensation network from COMP to
SGND for current-mode control (see the Feedback Compensation section).
Oscillator Timing Resistor Connection. Connect a timing resistor (R T ) from RT to SGND to program
the switching frequency according to the formula R T = 7.350 x 10 9 /f sw (for the MAX16814A_ _
and the MAX16814U_ _) or to the formula R T = 7.72 x 10 9 /f sw (for the MAX16814B_ _ _). Apply an
AC-coupled external clock at RT to synchronize the switching frequency with an external clock.
Open-Drain Fault Output. FLT asserts low when an open LED, short LED, or thermal shutdown
is detected. Connect a 10kω pullup resistor from FLT to V
Overvoltage Threshold Adjust Input. Connect a resistor-divider from the switching converter
output to OVP and SGND. The OVP comparator reference is internally set to 1.23V.
LED Current Adjust Input. Connect a resistor (R
through each LED string (I
LED Short Detection Threshold Adjust Input. Connect a resistive divider from V
SGND to program the LED short detection threshold. Connect RSDT directly to V
LED short detection. The LED short detection comparator is internally referenced to 2V.
Signal Ground. SGND is the current return path connection for the low-noise analog signals.
Connect SGND, LEDGND, and PGND at a single point.
Digital PWM Dimming Input. Apply a PWM signal to DIM for LED dimming control. Connect
DIM to V
LED String Cathode Connection 1. OUT1 is the open-drain output of the linear current sink that
controls the current through the LED string connected to OUT1. OUT1 sinks up to 150mA. If
unused, connect OUT1 to LEDGND.
CC
if dimming control is not used.
LED
) according to the formula I
FUNCTION
SETI
) from SETI to SGND to set the current
LED
CC
.
= 1500/R
Pin Description
SETI
.
CC
CC
to RSDT and
to disable