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CXLC8991同步升压变换器异步降压变换器和两个电荷泵稳压器将8V到14V的输入电压转换为四个输出电压带有一个通道运放升压变换器提供源电压VA VDD降压变换器为系统提供逻辑电压VLOGIC

产品型号：CXLC8991
产品类型：显示屏驱动
产品系列：液晶显示驱动
产品状态：量产
浏览次数：55 次
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产品简介

CXLC8991 DC-DC转换器提供QFN6X6-40封装的薄膜晶体管（TFT）液晶显示器（LCD）面板所需的调节电压。一个同步升压变换器、一个异步降压变换器和两个电荷泵稳压器将8V到14V的输入电压转换为四个输出电压，并带有一个通道运放。这些功能完成了大屏幕液晶面板的供电要求。升压变换器提供源电压VAVDD，降压变换器为系统提供逻辑电压VLOGIC。双电荷泵稳压器独立地产生可调节的输出电压VGL和VGH，使用连接到开关节点的外部电荷泵来偏置LCD。升压变换器和降压变换器以750kHz的固定开关频率工作，所有输出都是可编程的

技术参数

输入电压范围 (VIN) V ~ 8~14VV
输出电压 (VOUT)ADJV
输出电流 (IOUT)5A
工作频率750Hz
转换效率95%%
封装类型TQFN6X6-40
Dimming methodPSM/PWM
Led count36×4
Iq1UA
Interface14+1
Power—
Pf value.9
Topology液晶显示驱动
Application type显示屏驱动
Topology typeBUCK
ProtectionOVP/OCP/短路保护
FeaturesIntegrated   PMIC for LCD
VLX(V)24
OPAS/R(V/μs)30
OPAISCmA200

产品详细介绍

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

The CXLC8991 DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in QFN6X6-40 package. One synchronous step-up converter, one asynchronous step-down converter, and two charge pumps regulators convert the 8V to 14V input voltage into four output voltages with 1 channel OPAMP. These features complete the power- supply requirements of large screen LCD panels. The step-up converter provides source voltages VAVDD and the step-down converter provides logic voltage VLOGIC for the system. The dual charge pumps regulators independently generate adjustable regulated output voltages VGL and VGH to bias the LCD using external charge pump attached to the switching node. The step-up converter and step-down converter operate with a fixed switching frequency of 750kHz, and all output are programmable. The CXLC8991 is available in a 40-pin QFN (6mm x 6mm) package

   产品特点 返回TOP

„ Input Supply Range: 8V ~ 14V 

„ Current Mode Sync-Boost Converter for AVDD 

¾ Fixed 750kHz Switching Frequency 

¾ 2.2A to 5A Programmable Current Limit 

¾ 13.5V to 19.8V Programmable Output 

¾ Integrated 20V/0.1Ω Switching N-MOSFET 

„ Buck Converter for VLOGIC 

¾ Fixed 750kHz Switching Frequency 

¾ 2.2V to 3.7V Programmable Output 

¾ Integrated 12V/0.2Ω Switching N-MOSFET 

„ Positive Charge-Pump Regulator for VGH 

¾ 20V to 35V Programmable Output 

¾ Thermal Compensation 

„ Negative Charge-Pump Regulator for VGL 

¾ -4.5V to -13.5V Programmable Output 

„ Built-in Power-On Sequence and Soft-Start Function 

„ Isolation Switching PMOS for AVDD 

„ Protection Function 

¾ Input Under Voltage Lockout (UVLO) 

¾ Over-Temperature Protection (OTP) 

¾ Over-Voltage Protection (OVP) 

¾ Over-Current Protection (OCP) 

¾ Output Under Voltage Protection (UVP) 

¾ Short Circuit Protection (SCP) 

„ 2-Wire I2 C Slave Mode Interface 

„ Available in QFN6X6-40 Package

   应用范围 返回TOP

„ TFT LCD Displays

   技术规格书（产品PDF) 返回TOP 

     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！

 QQ截图20160419174301.jpg

产品封装图 返回TOP

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电路原理图 返回TOP

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Integrated   PMIC for LCD

Part NO.

Vin(V)

min.

Vin(V)

max.

FSW

(kHz)

ILX

(A)

VLX

(V)

OPAS/

R(V/μs

OPAI

SCmA

Note

Package

CXLC8984

2.5

5.5

1200

3

18

40

200

Async-Boost,VGH/VGL Charge-Pump,

VCOM,GPM, Voltage Detector

TQFN4X4-24

CXLC8985

2.5

5.5

1200

1.8

20

12

150

Async-Boost, VCOM,VGH/VGL Charge-Pump,

1-CH   WLED Driver with EN,LXB=20V/1.2A

TQFN4X4-24

CXLC8986

2.5

5.5

1200

2

20

12

200

Async-Boost,VGL Regulator,LDO,GPM,OPA,

Voltage Detector,6-CH WLED Driver,30mA/CH

TQFN5X5-40

CXLC8987

2.5

5.5

600

2

20

12

200

Async-Boost,VGL Regulator,LDO,GPM,OPA,

Voltage Detector,6-CH WLED Driver,30mA/CH

TQFN5X5-40

CXLC8988

2.6

5.5

600/

1200

3

20

20

200

Async-Boost,VGH Regulator,OPA*3,Buck-Boost VGL 

Temp. Compensation,7-CH-33V~+33V Level-Shifter

TQFN6X6-48

CXLC8989

2.6

5.5

600/

1200

--

--

20

200

Async-Boost,VGH Regulator,OPA*3,Buck-Boost VGL 

Temp. Compensation,7-CH-33V~+33V Level-Shifter

QFN6X6-48

CXLC8990

2.6

5.5

600/

1200

3

20

20

200

Async-Boost,VGH Regulator,OPA*3,Buck

-Boost VGL with Temp. Compensation 

QFN5X5-32

CXLC8991

8

14

750

5

24

30

200

Async-Boost,Async-Buck, OPA,VGON and VGOFF

Regulator,GPM,VGH Temp. Compensation,I2C

TQFN6X6-40

CXLC8992

2.5

5.5

1200

4.5

18

--

--

Async-Boost,   VGHM,VGH/VGOFF Charge-Pump

TQFN5X5-20

CXLC8993

2.5

5.5

1200

3

18

40

200

Async-Boost,VGH/VGL Charge-Pump,

VCOM, GPM,Voltage Detector

TQFN4X4-24

CXLC8994

2.5

5.5

1200

1.8

20

12

150

Async-Boost,VGH/VGL Charge-ump,VCOM,

CXLC8994A With EN,CXLC8994S With XAO

TQFN3X3-16

CXLC8994

A/S

2.5

5.5

1200

1.8

20

12

150

Async-Boost,VGH/VGL Charge-Pump,VCOM, 

CXLC8994A With EN,CXLC8994S With XAO

TQFN3X3-16

CXLC8995

/A

2.5

5.5

640/

1200

2

20

12

150

Async-Boost, VGH Charge-Pump,VCOM, GPM,

Voltage Detector,LDO

TQFN4X4-24

CXLC8996A

2.5

5.5

640/

1200

2

20

12

150

Async-Boost,VGH Charge-Pump,VCOM,LDO,GPM,

Voltage Detector,4-CH WLED   Driver,50mA/CH

TQFN5X5-40

TQFN3.8X6.2

CXLC8997

2.5

5.5

640/

1200

2

20

12

150

Async-Boost,VGH Charge-Pump,VCOM, GPM,

Voltage Detector

TQFN4X4-24

CXLC8998

2.5

5.5

1200

1.8

20

12

150

Async-Boost,VGH Charge-Pump,VGL Charge-Pump,

Voltage Detector,1-CH WLEDdriver,240mA/CH,HVInput

TQFN4X4-24

CXLC8999

/B

8

14

500/

750

2.3

19

--

--

Async-Boost,Async-Buck,VGH/VGL,Charge-Pump

TSSOP-28(FD)

CXLC89100

/A

8

14

500/

750

3

20

45

200

Async-Boost,Async-Buck, VGH/VGL Charge-Pump, GPM,VCOM,Voltage Detector,HV LDO

TQFN7X7-48

CXLC89101

9.5

14

500~

2000

3.5

20

--

--

Async-Boost,Async-Buck,VGON and VGOFF Regulator

TQFN5X5-28

CXLC89102

8

14

750/

1000

5

24

--

--

Async-Boost,Sync-Buck*2,Async-Buck,VGON and 

VGOFF Regulator,GPM,VGH Temp.Compensation,I2C 

TQFN6X6-40

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