CXLC8954两个高性能升压转换器和两个用于TFT LCD和背光应用的电荷泵控制器固定频率的PWM开关调节器1.0兆赫的开关频率允许使用低剖面感应器和陶瓷电容器最小化液晶面板设计的厚度

CXLC8954集成了两个高性能升压转换器和两个用于TFTLCD和背光应用的电荷泵控制器。两个升压调节器都是电流模式，固定频率的PWM开关调节器。1.0兆赫的开关频率允许使用低剖面感应器和陶瓷电容器，以最小化液晶面板设计的厚度。电荷泵控制器提供调节TFT-LCD VGH和VGL电源的网关驱动器

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXLC8954 integrates with two high-performance stepup converter and two charge pump controllers for TFTLCD and Backlight applications. Both the two step-up regulators are a current-mode, fixed-frequency PWM switching regulator. The 1.0MHz switching frequency allows the usage of low-profile inductors and ceramic capacitors to minimize the thickness of LCD panel designs. The charge pump controllers provide regulated the gatedriver of TFT-LCD VGH and VGL supplies. The CXLC8954 is available in a tiny 3mm x 3mm 20-pin TQFN package (TQFN3x3-20).

   产品特点 返回TOP

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· 2.9V to 5.5V Input Supply Range 

· Current Mode Step-up Regulator (LCD bias) 

 - 1MHz Fixed Operating Frequency 

 - Fast Transient Response 

 - 18V/700mA ,1.5W Internal N-MOS 

· Positive & Negative Charge Pump Driver for VGH, VGL 

· Current Mode Step-up Regulator (LED BL) 

 - 1MHz Fixed Operating Frequency 

 - 0.2V Feedback Voltage 

 - 18V/2A, 0.3W internal N-MOS 

· Control Output for External P-MOS to Support 

· Completely Disconnecting the Battery 

· Adjustable Power Sequencing by External Capacitor 

· Internal Soft-Start 

· Multiple Overload Protection 

· Thermal Shutdown 

· Available in Small Package:TQFN3x3-20

   应用范围 返回TOP

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· Tablet PC

   技术规格书（产品PDF) 返回TOP 

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     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

 

产品封装图 返回TOP

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电路原理图 返回TOP

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PMIC > LCD Bias Converter

Part_No

Package

Topology

Buffer for  Vcom

Switch  Current  Limit (A)

Vin (V)

Fmax Khz

SYNC ASYNC

PFM/PSM

Vref (V)

R-Top milohm

Iq(No  load) (uA)

En pin

POK

Charge Pump  Output

min

max

CXLC8953

TQFN3 x3-20

Boos tCharge pump

Yes

2

2.7

5.5

1500

ASYNC

PSM/PWM

1.25

500

300

Yes

No

Two set for VGH, VGL

CXLC8954

TQFN3 x3-20

Boos tCharge pump

2

2.9

5.5

1000

ASYNC

PSM/PWM

1.25

Yes

No

Two set for VGH,VGL

CXLC8955

TQFN5 x5-32

Boost Charge pump

Yes

1.8

3

5.5

1000

ASYNC

PSM/PWM

1.25

250

2000

Yes

No

Two set for VGH,VGL

CXLC8956

WLCSP1.92 x1.28-15

Boost  Charge pum

0.6

2.5

5.5

1800

SYNC

PSM/PWM

540

Yes

No

Two set for VGH,VGL