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MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
A third method is to hold both LE and OE in the
enabled state. This allows the data bits to directly con-
trol the output channels, and hence, pulse dim the out-
put current. Make sure that the clock frequency does
not exceed the maximum rate at which the device can
change the state of the output channels.
Power Dissipation
The power dissipation (P D ) of the MAX16824/
MAX16825 is determined from the following equation:
P D = ( V IN × I IN ) + ( V INL ? V LED 1 ? V CS 1 ) × ( I LED 1 × DUT Y 1 )
+ ( V INL ? V LED 2 ? V CS 2 ) × ( I LED 2 × DUTY 2 )
+ ( V INL ? V LED 3 ? V CS 3 ) × ( I LED 3 × DUTY 3 )
where:
V IN = supply voltage
V INL = supply voltage to the LED strings
V LED_ = total forward voltage for one LED string
I LED_ = LED current
V CS_ = 200mV drop across R CS_
DUTY_ = PWM_ duty cycle
The worst-case power dissipation occurs when the
drop across each internal MOSFET is at its maximum
with all three channels delivering the maximum allow-
able output current. The maximum drop across the
internal MOSFETs is determined by:
V INL - V LED_ - V CS_ when V LED_ is at its minimum.
Higher ambient temperature increases the thermal stress
even further due to the reduction in voltage drop across
the LEDs. The MAX16824/MAX16825 thermal specifica-
tions are given according to the JEDEC-51 guidelines.
Good mechanical/thermal design practices must be
applied to help maintain the device junction temperature
below the absolute maximum ratings at all times.
I IN = supply current
Pin Configurations
TOP VIEW
TOP VIEW
OUT1 1
CS1 2
IN 3
REG 4
N.C. 5
N.C. 6
PWM1 7
PWM2 8
+
MAX16824
16 OUT2
15 CS2
14 N.C.
13 CS3
12 OUT3
11 GND
10 N.C.
9 PWM3
OUT1 1
CS1 2
IN 3
REG 4
N.C. 5
CLK 6
DIN 7
LE 8
+
MAX16825
16 OUT2
15 CS2
14 N.C.
13 CS3
12 OUT3
11 GND
10 DOUT
9 OE
TSSOP-EP
Chip Information
PROCESS: BiCMOS-DMOS
TSSOP-EP
Package Information
For the latest package outline information and land patterns (foot-
prints), go to www.maximintegrated.com/packages . Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
12
PACKAGE
TYPE
16 TSSOP-EP
PACKAGE
CODE
U16E+3
OUTLINE NO.
21-0108
LAND
PATTERN NO.
90-0120
Maxim Integrated
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相关代理商/技术参数
MAX16826AGJ/VY+ 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Rail/Tube
MAX16826AGJ/VY+T 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Tape and Reel
MAX16826ATJ/V+ 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Rail/Tube
MAX16826ATJ/V+T 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Tape and Reel
MAX16826ATJ/VY+ 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Rail/Tube
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MAX16826ATJ+C24 功能描述:LED照明驱动器 Prog 4-String HB RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N