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| 型号： | MAX16838ATP+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/21页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR HIGH BRIGHT 2CH 20TQF |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 恒定电流： | 是 |
| 拓扑： | 线性（LDO），PWM，SEPIC，递升（升压） |
| 输出数： | 2 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 200kHz ~ 2MHz |
| 电源电压： | 4.75 V ~ 40 V，4.55 V ~ 5.5 V |
| 输出电压： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（4x4） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
EVALUATION KIT AVAILABLE
MAX16838
Integrated, 2-Channel, High-Brightness LED Driver
with High-Voltage Boost and SEPIC Controller
General Description
The MAX16838 is a dual-channel LED driver that inte-
grates both the DC-DC switching boost regulator and
two 150mA current sinks. A current-mode switching
DC-DC controller provides the necessary voltage to
both strings of HB LEDs. The MAX16838 accepts a wide
4.75V to 40V input voltage range and directly withstands
automotive load-dump events. For a 5V Q 10% input volt-
age, connect V IN to V CC . The wide input range allows
powering HB LEDs for small-to-medium-sized LCD dis-
plays in automotive and display backlight applications.
An internal current-mode switching DC-DC controller
supports the boost or SEPIC topologies and operates
in an adjustable frequency range between 200kHz and
2MHz. The current-mode control provides fast response
and simplifies loop compensation. The MAX16838 also
features an adaptive output-voltage adjustment scheme
that minimizes the power dissipation in the LED current
sink paths. The MAX16838 can be combined with the
MAX15054 to achieve a buck-boost LED driver with two
integrated current sinks.
The channel current is adjustable from 20mA to 150mA
using an external resistor. The external resistor sets both
channel currents to the same value. The device allows
connecting both strings in parallel to achieve a maximum
current of 300mA in a single channel. The MAX16838
also features pulsed dimming control with minimum
pulse widths as low as 1 F s, on both channels through a
logic input (DIM).
The MAX16838 includes an output overvoltage protec-
tion, open LED, shorted LED detection and overtempera-
ture protection. The device operates over the -40 N C to
+125 N C automotive temperature range. The MAX16838
is available in the 20-pin TSSOP and 4mm x 4mm, 20-pin
TQFN packages.
Features
S Integrated, 2-Channel, 20mA to 150mA Linear LED
Current Sinks
S Boost or SEPIC Power Topologies for Maximum
Flexibility
S Adaptive Voltage Optimization to Minimize Power
Dissipation in Linear Current Sinks
S 4.75V to 40V or 5V ±10% Input Operating Voltage
Range
S 5000:1 PWM Dimming at 200Hz
S Open-Drain Fault Indicator Output
S LED Open/Short Detection and Protection
S Output Overvoltage and Overtemperature
Protection
S Programmable LED Current Foldback at Lower
Input Voltages
S 200kHz to 2MHz Resistor Programmable
Switching Frequency with External
Synchronization
S Current-Mode Control Switching Stage with
Internal Slope Compensation
S Enable Input
S Thermally Enhanced, 20-Pin TQFN (4mm x 4mm)
and 20-Pin TSSOP Packages
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX16838ATP+ -40 N C to +125 N C 20 TQFN-EP*
MAX16838ATP/V+ -40 N C to +125 N C 20 TQFN-EP*
MAX16838AUP+ -40 N C to +125 N C 20 TSSOP-EP*
MAX16838AUP/V+ -40 N C to +125 N C 20 TSSOP-EP*
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
/V denotes an automotive qualified part.
Simplified Schematic
Applications
Automotive Display Backlights
4.75V TO 40V
C IN
L
D
R2 OV
C OUT
LCD Display Backlights
Automotive Lighting Applications
EN
CFB
IN
DRAIN
OV
NDRV
GATE
R1 OV
LED
STRINGS
V CC
OUT1
DRV
MAX16838
OUT2
ISET
R ISET
FLT
DIM
COMP
CS
RT
C COMP
R COMP
SGND
PGND
LEDGND
R RT
R CS
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4972; Rev 3; 6/13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16838ATP/V+ | 功能描述:LED照明驱动器 Integrated 2-Channel High-Brightness LED Drivers with High-Voltage DC-DC Controller 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 |
| MAX16838ATP/V+T | 功能描述:LED照明驱动器 Integrated 2-Channel High-Brightness LED Drivers with High-Voltage DC-DC Controller 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 |
| MAX16838ATP+ | 功能描述:LED照明驱动器 HB w/High-Voltage DC/DC Controller 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 |
| MAX16838ATP+T | 功能描述:LED照明驱动器 HB w/High-Voltage DC/DC Controller 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 |
| MAX16838ATT+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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