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MAX16838ATP

更新时间： 2024-11-11 11:18:23

品牌	Logo	应用领域
美信 - MAXIM		驱动器高压控制器
页数	文件大小	规格书
21页	1546K
描述
Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Controller

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MAX16838ATP 数据手册

19-4972; Rev 2; 4/11

Integrated, 2-Channel, High-Brightness LED Driver

with High-Voltage Boost and SEPIC Controller

General Description

Features

S Integrated, 2-Channel, 20mA to 150mA Linear LED

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 Q10% input volt-

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

age, connect V to V . The wide input range allows

S 5000:1 PWM Dimming at 200Hz

powering HB LEDs for small-to-medium-sized LCD dis-

plays in automotive and display backlight applications.

S Open-Drain Fault Indicator Output

S LED Open/Short Detection and Protection

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.

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)

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 1Fs, on both channels through a

logic input (DIM).

and 20-Pin TSSOP Packages

Ordering Information

PART

TEMP RANGE

-40NC to +125NC

PIN-PACKAGE

20 TQFN-EP*

20 TSSOP-EP*

MAX16838ATP+

MAX16838ATP/V+

MAX16838AUP+

MAX16838AUP/V+ -40NC to +125NC

The MAX16838 includes an output overvoltage protec-

tion, open LED, shorted LED detection and overtempera-

ture protection. The device operates over the -40NC to

+125NC automotive temperature range. The MAX16838

is available in the 20-pin TSSOP and 4mm x 4mm, 20-pin

TQFN packages.

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

/V denotes an automotive qualified part.

Simplified Schematic

4.75V TO 40V

Applications

Automotive Display Backlights

OUT

LED

STRINGS

LCD Display Backlights

DRAIN OV

NDRV

Automotive Lighting Applications

CFB

GATE

OUT1

MAX16838

OUT2

ISET

DRV

ISET

FLT

DIM

COMP

SGND

PGND LEDGND

Typical Operating Circuit and Pin Configurations appear at

end of data sheet.

_______________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...21

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与MAX16838ATP相关器件

型号	品牌	获取价格	描述	数据表
MAX16838ATP/V+	MAXIM	获取价格	LED Driver, 2-Segment, BICMOS, 4 X 4 MM, ROHS COMPLIANT, TQFN-20
MAX16838ATP+	MAXIM	获取价格	Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Contro
MAX16838ATPV+	MAXIM	获取价格	Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Contro
MAX16838ATV	MAXIM	获取价格	Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Contro
MAX16838AUP	MAXIM	获取价格	Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Contro
MAX16838AUP/V+	MAXIM	获取价格	LED Driver, 2-Segment, BICMOS, PDSO20, ROHS COMPLIANT, TSSOP-20
MAX16838AUP+	MAXIM	获取价格	Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Contro
MAX16838AUP+T	MAXIM	获取价格	暂无描述
MAX16838AUPV+	MAXIM	获取价格	Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Contro
MAX16838AUV	MAXIM	获取价格	Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Contro

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