参数资料
型号: MAX16823ATE/V+
厂商: Maxim Integrated
文件页数: 8/12页
文件大小: 0K
描述: IC LED DRIVER HIGH BRIGHT 16WQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 60
恒定电流:
拓扑: 线性(LDO),开路漏极,PWM
输出数: 3
内部驱动器:
类型 - 主要: 车载
类型 - 次要: 高亮度 LED(HBLED),RGB
电源电压: 5.5 V ~ 40 V
输出电压: 3.41V
安装类型: 表面贴装
封装/外壳: 16-WQFN 裸露焊盘
供应商设备封装: 16-TQFN-EP(5x5)
包装: 管件
工作温度: -40°C ~ 125°C
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
ICM7555. When V STOP is present, DIM is pulled up to
V STOP . The PWM dimming operation is disabled and
the LEDs light up to full brightness. See the ICM7555
data sheet for formulas to calculate the dimming fre-
quency and the duty cycle.
Outputs Latch-Off
Figure 3 shows a circuit with DIM1, DIM2, DIM3, and
LEDGOOD connected through a resistor to V REG . This
circuit is useful for applications that require all outputs
to latch off when one of the LEDs opens. The
MAX16823 resumes current regulation again through
power cycling, once the fault condition is removed.
Other Applications
The application circuit in Figure 4 implements a two-
level brightness current for TAIL/STOP lights. In TAIL
operation, Q1 is off and R CS1 sets the output current. In
STOP operation, Q1 turns on and the output current is
set by a parallel combination of R CS1 and R2.
Figure 5 shows an application circuit with the
MAX16823 using a single BJT to provide high output
current. For proper operation:
V IN ( MIN ) > V BE ( MAX ) + V FT ( MAX ) + V CS _ + V DO ( MAX )
For minimized dropout, the LEDs can be placed in the
collector.
t ON
DIM
t OFF
LEDGOOD GOES
LEDGOOD
Figure 1. LEDGOOD Timing Delay
STOP
D1
LOW WHEN t OFF > t DELAY
TAIL
R1
D4
C1
IN
OUT3
OUT2
OUT1
REG
R2
D2
DIM1
MAX16823
CS1
0.1 μ F
LEDs
R3
DIS
IN
OUT
D3
DIM2
CS2
R CS1
TH
TRG
GND
100k Ω
DIM3
R CS2
C2
ICM7555
GND
CS3
R CS3
Figure 2. PWM Dimming Operation with ICM7555
8
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