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MAX16826
Programmable, Four-String HB LED Driver with
Output-Voltage Optimization and Fault Detection
Pin Description
8
PIN
1
2, 3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
NAME
PGND
GND
RTCT
SYNC/EN
CSS
COMP
FB
OVP
RSC
SDA
SCL
DIM1
DIM2
DIM3
DIM4
CS1
FUNCTION
Power Ground
Analog Ground
Timing Resistor and Capacitor Connection. A resistor, R19 (in the Typical Application Circuit ), from V CC to
RTCT and a capacitor C33, from RTCT to GND set the oscillator frequency. See the Oscillator section to
calculate RT and CT component values.
Synchronization and Enable Input. There are three operating modes:
SYNC/EN = LOW: Low current shutdown mode with all circuits shut down except shunt regulator.
SYNC/EN = HIGH: All circuits active with oscillator frequency set by RTCT network.
SYNC/EN = CLOCKED: All circuits active with oscillator frequency set by SYNC clock input. Conversion
cycles initiate on the rising edge of external clock input. The frequency programmed by R19/C33 must be
10% lower than the input SYNC/EN signal frequency.
Soft-Start Timing Capacitor Connection. Connect a capacitor from CSS to GND to program the required soft-
start time for the switching regulator output voltage to reach regulation. See the Soft-Start (CSS) section to
calculate C CSS .
Switching Regulator Compensation Component Connection. Connect the compensation network between
COMP and FB.
Switching Regulator Feedback Input. Connect FB to the center of a resistor-divider connected between the
switching regulator output and GND to set the output voltage. FB is regulated to a voltage set by an internal
register. See the Setting Output Voltage section for calculating resistor values.
Switching Regulator Overvoltage Input. Connect OVP to the center of a resistor-divider connected between the
switching regulator output and GND. For normal operation, configure the resistor-divider so that the voltage at
this pin does not exceed 1.25V. If operation under load dump conditions is also required, configure the resistor-
divider so that the voltage at OVP is less than 1.25V.
Slope Compensation Resistor and PWM Comparator Input Connection. Connect a resistor, R17, from RSC to
the switching current-sense resistor to set the amount of the compensation ramp. See the Slope Compensation
(RSC) section for calculating the value.
I 2 C Serial Data Input/Output
I 2 C Serial Clock Input
LED String 1 Logic-Level PWM Dimming Input. A high logic level on DIM1 enables the current sink to operate at
the maximum current as determined by its sense resistor and internal register value. A low logic level disables
the current source.
LED String 2 Logic-Level PWM Dimming Input. A high logic level on DIM2 enables the current sink to operate at
the maximum current as determined by its sense resistor and internal register value. A low logic level disables
the current source.
LED String 3 Logic-Level PWM Dimming Input. A high logic level on DIM3 enables the current sink to operate at
the maximum current as determined by its sense resistor and internal register value. A low logic level disables
the current source.
LED String 4 Logic-Level PWM Dimming Input. A high logic level on DIM4 enables the current sink to operate at
the maximum current as determined by its sense resistor and internal register value. A low logic level disables
the current source.
LED String 1 Current-Sense Input. CS1 is regulated to a value set by an internal register. The regulation voltage
can be set between 97mV and 316mV.
Maxim Integrated
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相关代理商/技术参数
MAX16826ATJ+T 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
MAX16826ATJ+TC24 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Tape and Reel
MAX16826BATJ/V+ 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
MAX16826BATJ/V+T 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
MAX16826BATJ+ 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Rail/Tube
MAX16826BATJ+T 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Tape and Reel
MAX16826EVKIT+ 制造商:Maxim Integrated Products 功能描述:EVAL KIT FOR THE MAX16826 - Boxed Product (Development Kits)
MAX16826-SMP 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Tape and Reel