MAX16809ATU+ Maxim Integrated Products, MAX16809ATU+ Datasheet - Page 16

• Manufacturer Part Number: MAX16809ATU+
• Description: IC DRIVER LED 16CH 38TQFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LED, RGB (Serial Interface)r

Specifications of MAX16809ATU+

• Constant Current: Yes
• Topology: *
• Number Of Outputs: 16
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: RGB, White LED
• Frequency: 20kHz ~ 1MHz
• Voltage - Supply: 8 V ~ 26.5 V
• Voltage - Output: 36V
• Mounting Type: Surface Mount
• Package / Case: 38-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 55mA
• Internal Switch(s): No
• Low Level Output Current: 6 mA
• High Level Output Current: 1.8 mA
• Operating Supply Voltage: 3 V to 5.5 V
• Maximum Supply Current: 5 mA
• Maximum Power Dissipation: 2857 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / Rohs Status: Details

Integrated 16-Channel LED Driver with
Switch-Mode Boost and SEPIC Controller
Figure 3. 4-Wire Serial-Interface Timing Diagram
Figure 4. LE and CLK to OUT_ _ Timing
16
OUT_ _
OUT_ _
LE
LE
CLK
OUT_ _
CLK
OUT_ _
______________________________________________________________________________________
OUT_ _
DOUT
CLK
DIN
OE
LE
t
t
LRF
t
LRR
CRF
t
CRR
t
DS
D15
t
DH
t
CL
t
OEF
D14
t
F
t
CH
t
OEW
80%
20%
The MAX16809 uses an external resistor, R
the LED current for outputs OUT0–OUT15. The mini-
mum allowed value of R
put currents to 55mA. The maximum allowed value of
R
allowed capacitance at SET is 100pF.
Use the following formula to set the output current:
where I
and the value for R
The MAX16809 contains an internal temperature sensor
that turns off all outputs when the die temperature
exceeds +165°C. The outputs are enabled again when
the die temperature drops below +140°C. Register con-
tents are not affected, so when a driver is overdissipat-
ing, the external symptom is the load LEDs cycling on
and off as the driver repeatedly overheats and cools,
alternately turning itself off and then back on again.
SET
t
OER
D1
t
is 5kΩ (I
R
OUT_ _
t
DO
t
CP
R
is the desired output current in milliamps
OUT_ _
Selecting External Component
SET
D0
SET
t
LS
R
SET
to Set LED Output Current
is in ohms.
SET
D15
= 3.6mA) and the maximum
Overtemperature Cutoff
t
=
LW
17 100
I
OUT
is 311Ω, which sets the out-
,
_ _
V
SET
, to set