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| 型号： | MAX16831EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/19页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX16831 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 1A |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 28V |
| 特点： | 可调光 |
| 输入电压： | 9 ~ 40 V |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX16831 |
MAX16831
High-Voltage, High-Power LED Driver with
Analog and PWM Dimming Control
Pin Description (continued)
PIN
25
26
27
28
29
30
31
32
—
NAME
LO
CS+
CS-
CLMP
HI
REG2
V CC
I.C.
EP
FUNCTION
Low-Voltage Input. LO is the return point for the LED current. When using the MAX16831 in a buck-
boost configuration, connect LO to V CC . When using the device in a boost configuration only,
connect LO to SGND. Connect LO to the junction of the inductor and LED current-sense resistor,
R CS , when using a buck configuration.
Noninverting Current-Sense Amplifier Input. Connect CS+ to the positive side of an external sense
resistor, R CS , connected in series with the load (LEDs).
Inverting Current-Sense Amplifier Input. Connect CS- to the negative side of an external sense
resistor, R CS , connected in series with the load (LEDs).
Internal CLMP Regulator Output. CLMP supplies an 8V (typ) output when V HI ≥ 9V. If V HI is lower than
9V, V CLMP is one diode drop below V HI . The CLMP regulator powers the current-sense amplifier and
provides the high reference for the dimming driver. V CLMP must be at least 2.5V higher than V LO to
enable the current-sense amplifier and dimming MOSFET driver. Bypass CLMP to LO with a 0.1μF
ceramic capacitor.
High-Voltage Input. HI is referred to LO. HI supplies power to the current-sense amplifier and
dimming MOSFET gate driver through the CLMP regulator.
Internal Regulator Output. REG2 is an internal voltage regulator that generates a 7V output and
supplies power to internal circuitry. Connect REG2 to DRI to power the switching MOSFET driver
during normal operation. Bypass REG2 to AGND with a 10μF ceramic capacitor.
Supply Voltage Input
Internally Connected. This pin is internally pulled to REG1 through a 10k ? resistor. Leave this pin
unconnected or connect it to QGND using a resistor of any value. If it is directly connected to QGND,
400μA to 600μA of current will flow out of this pin from V CC . Any resistor between this pin and QGND
will reduce the current accordingly.
Exposed Pad. Connect EP to AGND. EP also functions as a heatsink to maximize thermal dissipation.
Do not use as a ground connection.
Detailed Description
The MAX16831 is a current-mode PWM LED driver
used for driving HBLEDs. By using two current regula-
tion loops, 5% output current accuracy is achieved.
One current regulation loop controls the external
switching MOSFET peak current through a sense resis-
tor, R SENSE , from SNS+ to SNS-, while the other current
regulation loop controls the average LED string current
through the sense resistor R CS in series with the LEDs.
The wide operating supply range of (6.0V/5.5V
ON/OFF) up to 76V makes the MAX16831 ideal in auto-
motive applications.
The MAX16831 features a programmable undervoltage
lockout (UVEN) that ensures predictable operation dur-
ing brownout conditions. The input UVEN circuit monitors
the supply voltage, V CC , and turns the driver off when
V CC drops below the UVLO threshold. Connect UVEN to
V CC to use the 5.7V (typ) default UVLO threshold. The
Maxim Integrated
MAX16831 includes a cycle-by-cycle current limit that
turns off the gate drive to the external switching MOS-
FET (Q S ) during an overcurrent condition. The
MAX16831 features a programmable oscillator that sim-
plifies and optimizes the design of external magnetics.
The MAX16831 includes three internal voltage regula-
tors, REG1, REG2, and CLMP, and a 3V buffered refer-
ence output, REF. Connect REG2 to the driver supply,
DRI, to power the switching MOSFET driver.
The MAX16831 is capable of synchronizing with an
external clock or operating in stand-alone mode. A sin-
gle resistor, R T , can be used to adjust the switching fre-
quency from 125kHz to 600kHz for stand-alone
operation. To synchronize the device with an external
clock, apply a clock signal directly to the RTSYNC
input. A buffered clock output, CLKOUT, is available to
configure the MAX16831 in multichannel applications.
9
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| MAX16831EVKIT+ | 功能描述:LED 照明开发工具 MAX16831 Eval Kit RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
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| MAX16832AASA+ | 功能描述:LED照明驱动器 Ic Led Drvr High Bright 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 |
| MAX16832AASA+T | 功能描述:LED照明驱动器 Ic Led Drvr High Bright 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 |
| MAX16832CASA+ | 功能描述:LED照明驱动器 Ic Led Drvr High Bright 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 |
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