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CXLC8999 CXLC8999B DC-DC转换器薄膜晶体管TFT液晶显示器LCD面板所需的调节电压升压转换器降压转换器和两个电荷泵将8V到14V的输入电压转换为四个输出电压升压转换器提供电源电压VS降压转换器为系统提供逻辑电压

产品型号：CXLC8999/B
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：66 次
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产品简介

CXLC8999 CXLC8999B DC-DC转换器提供TSSOP封装的薄膜晶体管（TFT）液晶显示器（LCD）面板所需的调节电压。一个升压转换器、一个降压转换器和两个电荷泵将8V到14V的输入电压转换为四个输出电压。这些功能完成了大屏幕液晶面板的供电要求。升压转换器提供电源电压VS，降压转换器为系统提供逻辑电压。双电荷泵独立地产生可调节的输出电压VGL和VGH来偏置LCD。这四个模块以500kHz或750kHz的固定开关频率工作。升压和降压转换器都以异步开关模式工作。电流模式控制提供了快速的瞬态响应，简化了回路稳定。故障保护包括逐周限流、热停堆、升压变换器过压保护和降压变换器短路保护。两个电荷泵均采用电流模式控制，以调节其输出电压，从而使输出纹波和电容器尺寸最小化。CXLC8999/B提供28针TSSOP软件包。

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)2.3A
工作频率500/750Hz
转换效率95%%
封装类型TSSOP-28(FD)
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)19
OPAS/R(V/μs)--
OPAISCmA--

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 CXLC8999/B DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in TSSOP package. One step-up converter, one step-down converter, and two charge pumps convert the 8V to 14V input voltage into four output voltages. These features complete the powersupply requirements of large screen LCD panels. The step-up converter provides source voltages VS and the step-down converter provides logic voltage for the system. The dual charge pumps independently generate adjustable regulated output voltages VGL and VGH to bias the LCD. These four blocks operate with a fixed switching frequency of 500kHz or 750kHz. Both step-up and step-down converters operate in asynchronous switch mode. Current mode control provides fast transient response and eases loop stabilization. Fault protection includes cycle-by-cycle current limit, thermal shutdown, overvoltage protection of the step-up converter and short-circuit protection of the step-down converter. Current mode control is used for both charge pumps to regulate its output voltage, which minimizes output ripple and capacitor sizes. The CXLC8999/B is available in an 28-pin TSSOP package.

   产品特点 返回TOP

„ 8V to 14V Input Voltage Range 

„ VS Output Voltage Range up to 19 V 

„ 1% Accurate Boost Converter with 3A Switch Current 

„ 1.5% Accurate 2.3A Step-Down Converter 

„ 500kHz/750kHz Fixed Switching Frequency 

„ 150mA Negative Charge Pump Driver for VGL 

„ 150mA Positive Charge Pump Driver for VGH 

„ Adjustable Sequencing for VGL, VGH 

„ Gate Drive Signal to Drive External MOSFET 

„ Internal and Adjustable Soft Start 

„ Cycle-by-Cycle Over Current Protection 

„ Short-Circuit Protection 

„ Overvoltage Protection 

„ Thermal Shutdown 

„ Available in TSSOP-28 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！

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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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