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参数资料
| 型号： | MAX16834AUP/V+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HIGH BRIGHT 20-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 拓扑： | PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 高亮度 LED（HBLED），RGB |
| 频率： | 100kHz ~ 1MHz |
| 电源电压： | 4.75 V ~ 28 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 20-TSSOP-EP |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
MAX16834
High-Power LED Driver with Integrated High-Side LED
Current Sense and PWM Dimming MOSFET Driver
Pin Description (continued)
PIN
QFN, TQFN
7
TSSOP
9
NAME
FLT
FUNCTION
Active-Low, Open-Drain Fault Indicator Output. See the Fault Indicator ( FLT ) section.
Resistor-Programmable Switching Frequency Setting/Sync Control Input. Connect a resistor
8
10
RT/SYNC from RT/SYNC to SGND to set the switching frequency. Drive RT/SYNC to synchronize the
switching frequency with an external clock.
Undervoltage-Lockout (UVLO) Threshold/Enable Input. UVEN is a dual-function adjustable
9
11
UVEN
UVLO threshold input with an enable feature. Connect UVEN to V IN through a resistive voltage-
divider to program the UVLO threshold. Observe the absolute maximum value for this pin.
10
12
PWMDIM PWM Dimming Input. Connect to an external PWM signal for dimming operation.
11
12
13
14
15
16
17
18
19
20
—
13
14
15
16
17
18
19
20
1
2
—
CS
PGND
NDRV
V CC
IN
HV
CLV
DIMOUT
LV
SENSE+
EP
Current-Sense Amplifier Positive Input. Connect a resistor from CS to PGND to set the inductor
peak current limit.
Power Ground
External n-Channel Gate-Driver Output
7V Low-Dropout Voltage Regulator. Bypass to PGND with at least a 1μF low-ESR ceramic
capacitor. V CC provides power to the n-channel gate driver (NDRV).
Positive Power-Supply Input. Bypass to PGND with at least a 0.1μF ceramic capacitor.
High-Side Positive Supply Input Referred to LV. HV provides power to high-side linear regulator
5V High-Side Regulator Output. CLV provides power to the dimming MOSFET driver. Connect a
0.1μF to 1μF ceramic capacitor from CLV to LV for stable operation.
External Dimming MOSFET Gate Driver. DIMOUT is capable of sinking/sourcing 50mA.
High-Side Reference Voltage Input. Connect to SGND for boost configuration. Connect to IN for
boost-buck configuration.
LED Current-Sense Positive Input. Connect a bypass capacitor of at least 0.1μF between
SENSE+ and LV close to the IC.
Exposed Pad. Connect EP to a large-area contiguous copper ground plane for effective power
dissipation. Do not use as the main IC ground connection. EP must be connected to SGND.
Detailed Description
The MAX16834 is a current-mode, high-brightness LED
(HB LED) driver designed to control a single-string LED
current regulator with two external n-channel MOSFETs.
The MAX16834 integrates all the building blocks nec-
essary to implement a fixed-frequency HB LED driver
with wide-range dimming control. The MAX16834
allows implementation of different converter topologies
such as SEPIC, boost, boost-buck, or high-side buck
current regulator.
The MAX16834 features a constant-frequency, peak-cur-
rent-mode control with programmable slope compensa-
tion to control the duty cycle of the PWM controller. A
dimming driver offers a wide-range dimming control for
the external n-channel MOSFET in series with the LED
string. In addition to PWM dimming, the MAX16834
allows for analog dimming of LED current.
Maxim Integrated
The MAX16834 switching frequency (100kHz to 1MHz)
is adjustable using a single resistor from RT/SYNC. The
MAX16834 disables the internal oscillator and synchro-
nizes if an external clock is applied to RT/SYNC. The
switching MOSFET driver sinks and sources up to 3A,
making it suitable for high-power MOSFETs driving in
HB LED applications, and the dimming control allows
for wide PWM dimming at frequencies up to 20kHz.
The MAX16834 is suitable for boost and boost-buck
LED drivers (Figures 2 and 3).
The MAX16834 alone operates over a wide 4.75V to
28V supply range. With a voltage clamp that limits the
IN pin voltage to less than 28V, it can operate in boost
configuration for input voltages greater than 28V.
Additional features include external enable/disable
input, an on-chip oscillator, fault indicator output ( FLT )
for LED open/short or overtemperature conditions, and
an overvoltage protection circuit for true differential
overvoltage protection (Figure 1).
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16834EVKIT+ | 功能描述:LED 照明开发工具 MAX16834 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: |
| MAX16835ATE/V+ | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE, 350MA, ADJUSTABLE LINEAR HIGH-BRIGHTNESS LED D - Rail/Tube |
| MAX16835ATE/V+T | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE, 350MA, ADJUSTABLE LINEAR HIGH-BRIGHTNESS LED D - Tape and Reel |
| MAX16835ATE+ | 功能描述:LED照明驱动器 350mA Adj Linear 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 |
| MAX16835ATE+T | 功能描述:LED照明驱动器 350mA Adj Linear 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 |
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