Datasheet > RT8452

RT8452

更新时间： 2024-09-24 12:56:43

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
16页	325K
描述
High Voltage High Current LED Driver Controller for Buck Boost or Buck-Boost Topology

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RT8452 数据手册

RT8452

High Voltage High Current LED Driver Controller for Buck

Boost or Buck-Boost Topology

General Description

Features

^zHigh Voltage Capability : V_INUp to 36V, V_OUTUp to

The RT8452 is a current mode PWM controller designed

to drive an external MOSFET for high current LED

applications. With a current sense amplifier threshold of

190mV, the LED current is programmable with one

external current sense resistor. With the maximum

operating input voltage of 36V and output voltage up to

48V, the RT8452 is ideal for Buck, Boost or Buck-Boost

operation.

48V

^zBuck, Boost or Buck-Boost Operation

^zCurrent Mode PWM with 350kHz Switching

Frenquency

^zEasy Dimming Control : Analog or Digital

Converting to Analog with One External Capacitor

^zTrue PWM Dimming : External FET Driver is Build-

With 350kHz operating frequency, the external inductor

and capacitors can be small while maintaining high

efficiency.

^zProgrammable Soft Start to Avoid Inrush Current

^zProgrammable Over Voltage Protection

z V_INUndervoltage Lockout and Thermal Shutdown

z 16-Lead WQFN and SOP Packages.

z RoHS Compliant and Halogen Free

Dimming can be done by either analog or digital. Abuilt-in

clamping comparator and filter allow easy low noise analog

dimming conversion from digital signal with only one

external capacitor. An unique True PWM dimming control

is made easy with MOSFET under LEDstring. Avery high

dimming ratio can be achieved by adopting both analog/

digital dimming and True PWM dimming together.

Applications

z General Industrial High Power LED Lighting

z Desk Lights and Room Lighting

z Building and Street Lighting

z Industrial Display Backlight

The RT8452 is available in WQFN-16L 3x3 and SOP-16

packages.

Pin Configurations

(TOP VIEW)

Ordering Information

RT8452

GBIAS

GATE

PWMOUT

ISW

PWMDIM

ISP

GND

VCC

OVP

Package Type

S : SOP-16

QW : WQFN-16L 3x3 (W-Type)

DCTL

ACTL

ISN

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

SOP-16

Richtek products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

` Suitable for use in SnPb or Pb-free soldering processes.

16 15 14 13

GBIAS

GATE

GND

PWMOUT

ISW

DCTL

ACTL

WQFN-16L 3x3

is a registered trademark of Richtek Technology Corporation.

DS8452-03 May 2012

www.richtek.com

12 3 4 5 6 7...16

中文翻译

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