Datasheet > MAX20069BGTLVY

MAX20069BGTLVY

更新时间： 2024-09-30 02:51:03

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描述
Automotive I2C-Controlled 4-Channel 150mA Backlight Driver and 4-Output TFT-LCD Bias

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MAX20069BGTLVY 数据手册

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MAX20069B

Automotive I C-Controlled 4-Channel 150mA

Backlight Driver and 4-Output TFT-LCD Bias

General Description

Benefits and Features

The MAX20069B is a highly integrated TFT power supply

and LED backlight driver IC for automotive TFT-LCD ap-

plications. The IC integrates one buck-boost converter,

one boost converter, two gate-driver supplies, and a

boost/SEPIC converter that can power one to four strings

of LEDs in the display backlight.

● 4-Output TFT-LCD Bias Power

• 2.8V to 5.5V Input for the TFT-LCD Section

• Integrated 440kHz or 2.2MHz Boost and Buck-

Boost Converters

• Positive and Negative 3mA Gate Voltage

Regulators with Adjustable Output Voltage

• Flexible Resistor-Programmable Sequencing

through the SEQ Pin

The source-driver power supplies consist of a synchro-

nous boost converter and an inverting buck-boost convert-

er that can generate voltages up to +15V and down to

-7V. The positive source driver can deliver up to 120mA,

while the negative source driver is capable of 100mA. The

• Undervoltage Detection on All Outputs

• Low-Quiescent-Current Standby Mode

● 4-Channel LED Backlight Driver

• Up to 150mA Current per Channel

• 4.5V to 42V Input Voltage Range

• Integrated Boost/SEPIC Controller (440kHz or

2.2MHz)

positive source-driver supply regulation voltage (V

) is

POS

set by connecting an external resistor-divider on FBP or

through I C. The negative source-driver supply voltage

) is always tightly regulated to -V

(down to a

NEG

POS

minimum of -7V). The source-driver supplies operate from

an input voltage between 2.8V and 5.5V.

• Dimming Ratio 10,000:1 at 200Hz

• Adaptive Voltage Optimization to Reduce Power

Dissipation in the LED Current Sinks

• Open-String, Shorted-LED, and Short-to-GND

Diagnostics

The gate-driver power supplies consist of regulated

charge pumps that generate up to +28V and -21.5V and

can deliver up to 3mA each.

● Low EMI

The IC features a quad-string LED driver that operates

• Phase-Shift Dimming of LED Strings

• Spread Spectrum on LED Driver and TFT

• Selectable Switching Frequency with Fine-Tuning

from a separate input voltage (V

) and can power up

BATT

to four strings of LEDs with 150mA (max) of current per

string. The IC features logic-controlled pulse-width-modu-

lation (PWM) dimming, with minimum pulse widths as low

as 500ns with the option of phase shifting the LED strings

with respect to each other. When phase shifting is en-

abled, each string is turned on at a different time, reducing

the input and output ripple as well as audible noise. With

phase shifting disabled, the current sinks turn on simulta-

neously and parallel connection of current sinks is possi-

ble.

via I C

● I C Interface for Control and Diagnostics

• Fault Indication through the FLTB pin and I C

● Overload and Thermal Protection

● -40°C to +105°C Ambient Temperature Operation

● 40-Pin (6mm x 6mm) TQFN Package with Exposed

Pad

The startup and shutdown sequences for all power do-

mains are controlled using one of the seven preset modes,

which are selectable through a resistor on the SEQ pin or

Ordering Information appears at end of datasheet.

through the I C interface.

The MAX20069B is available in a 40-pin (6mm x 6mm)

TQFN package with an exposed pad, and operates over

the -40°C to +105°C ambient temperature range.

Applications

● Automotive Dashboards

● Automotive Central Information Displays

● Automotive Head Up Displays

● Automotive Navigation Systems

19-100899; Rev 0; 9/20

12 3 4 5 6 7...57

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与MAX20069BGTLVY相关器件

型号	品牌	获取价格	描述	数据表
MAX20069C	ADI	获取价格	I2C控制的汽车级4通道150mA背光驱动器和4路输出TFT-LCD偏置电源
MAX20070	MAXIM	获取价格	2.7V to 5.5V Input Range for TFT Power Section
MAX20070	ADI	获取价格	Integrated TFT Power Supply and LED Backlight Drivers
MAX20070B	MAXIM	获取价格	2.7V to 5.5V Input Range for TFT Power Section
MAX20070B	ADI	获取价格	Integrated TFT Power Supply and LED Backlight Drivers
MAX20070BGTJA/V+	MAXIM	获取价格	LED Driver,
MAX20070EVKIT	MAXIM	获取价格	2.7V to 5.5V Input Range for TFT Power Section
MAX20071	ADI	获取价格	Single 600mA/1A 2.2MHz Low-Voltage Step-Down DC-DC Converter
MAX20072	ADI	获取价格	Single 600mA/1A 2.2MHz Low-Voltage Step-Down DC-DC Converter
MAX20073	MAXIM	获取价格	Single 2A/3A 2.2MHz Low-Voltage Step-Down DC-DC Converters

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