MAX16807AUI+T Maxim Integrated Products, MAX16807AUI+T Datasheet - Page 16

• Manufacturer Part Number: MAX16807AUI+T
• Description: IC LED DRVR WT/RGB BCKLT 28TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LED, RGB (Serial Interface)r

Specifications of MAX16807AUI+T

• Constant Current: Yes
• Topology: Open Drain, PWM, Step-Down (Buck), SEPIC, Step-Up (Boost)
• Number Of Outputs: 8
• 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: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 55mA
• Internal Switch(s): No
• Operating Supply Voltage: 3 V to 5.5 V
• Maximum Supply Current: 5 mA
• Maximum Power Dissipation: 2162 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 8-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_
LE
OUT_
LE
CLK
OUT_
CLK
OUT_
______________________________________________________________________________________
DOUT
OUT_
CLK
DIN
OE
LE
t
t
LRF
t
LRR
CRF
t
CRR
t
DS
D7
t
DH
t
CL
t
OEF
t
f
t
t
CH
OEW
80%
20%
In stand-alone operation, the MAX16807 does not use
the 4-wire interface (see the Typical Operating
Circuits ). Connecting DIN and LE to V+ provides at
least 8 external clock pulses to CLK to enable 8 out-
puts. This startup pulse sequence can be provided
either using an external clock or the PWM signal. The
external clock can also be generated using the signal
at RTCT and an external comparator.
All the output channels can be dimmed simultaneously
by applying a PWM signal (50Hz to 30kHz) to OE. This
allows for a wide range of dimming up to a 5000:1 ratio.
Each channel can be independently turned on and off
using a 4-wire serial interface. The dimming is propor-
tional to the PWM duty cycle.
Using an analog or digital potentiometer as R
for LED current amplitude adjustment and linear dimming.
t
OER
t
r
t
DO
LED Current Amplitude Adjustment
t
CP
D0
t
LS
D7
t
LW
Stand-Alone Operation
LED Dimming
PWM Dimming
SET
allows