Datasheet > DRV9812DDWR

DRV9812DDWR

更新时间： 2024-09-19 19:56:55

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
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描述
Four channel PWM power drvier for LED applications 44-HTSSOP -40 to 85

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DRV9812DDWR 技术参数

是否无铅：	含铅	生命周期：	Obsolete
零件包装代码：	TSSOP	包装说明：	,
针数：	44	Reach Compliance Code：	unknown
风险等级：	5.84	Base Number Matches：	1

DRV9812DDWR 数据手册

DRV9812

DRV9822

www.ti.com

SLES250 –DECEMBER 2009

Multi-Channel PWM Power Drivers for LED Applications

Check for Samples: DRV9812 DRV9822

Because of the integrated low R_DS(on)MOSFETs and

intelligent gate drive design, the efficiency of the

DRV9812/22 can be as high as 96%. They have all

the protections integrated on-chip, safeguarding the

device against a wide range of fault conditions such

as short-circuit protection, overcurrent protection,

undervoltage protection, and two-stage thermal

FEATURES

•

Four Independent Synchronized Buck, Boost,

or Two Buck-Boost PWM Controlled Power

Stages

•

High-Efficiency Power Stage (up to 96%) with

Low R_DS(on)MOSFETs (80 mΩ at T_J= 25°C)

protection.

A programmable overcurrent detector

•

Operating Supply Voltage up to 50 V

allows adjustable cycle-by-cycle current limit to meet

different power requirements.

DRV9812 (Pad down): up to 2.5A Continuous

Output Current

The DRV9812/22 have unique independent supply

pin for each channel, which make them possible to

support multiple outputs with different power supply

voltage requirements or mixed converter topologies.

•

DRV9822 (pad up): up to 5A Continuous

Output Current

•

PWM Operating Frequency up to 1 MHz

Integrated Self-Protection Circuits

Simplified Application Diagram

Vin

Programmable Cycle-by-Cycle Current Limit

Protection

12V

Up to 50V

•

Two-Stage Thermal Protection

DH_A

RESET_AB

DH_B

DH_C

DH_D

RESET_CD

PWM_A

PWM_B

PWM_C

PWM_D

Independent Supply Pin for Each Channel

VLED

BST_A

DL_A

Intelligent Gate Drive and Cross Conduction

Prevention

DRV9812/22

BST_B

DL_B

FAULT

OTW

BST_C

DL_C

OC_ADJ

Controller

(MSP430

C2000 or

BST_D

DL_D

APPLICATIONS

VREG

Stellaris MCU)

•

Multi-Channel Buck, Boost, or Buck-Boost

Power Stages

•

LED Drivers

DESCRIPTION

The DRV9812/22 are wide input voltage (up to 50V)

synchronous multi-channel PWM power stages for

LED applications. They can be configured as buck,

boost, or buck-boost topology depending on

application requirements and can drive 4 independent

LED strings with up to 15 power LEDs in series per

string. They can also provide DC, sine wave, or any

other kind of desired current to drive LEDs based on

PWM control algorithm from external MCU controller.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCT PREVIEW information concerns products in the

formative or design phase of development. Characteristic data and

other specifications are design goals. Texas Instruments reserves

the right to change or discontinue these products without notice.

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