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
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[ CXLC8991 ]"
目录
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
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产品封装图 返回TOP
电路原理图 返回TOP
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Integrated PMIC for LCD |
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Part NO. |
Vin(V) min. |
Vin(V) max. |
FSW (kHz) |
ILX (A) |
VLX (V) |
OPAS/ R(V/μs |
OPAI SCmA |
Note |
Package |
|
2.5 |
5.5 |
1200 |
3 |
18 |
40 |
200 |
Async-Boost,VGH/VGL Charge-Pump, VCOM,GPM, Voltage Detector |
TQFN4X4-24 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
2.6 |
5.5 |
600/ 1200 |
3 |
20 |
20 |
200 |
Async-Boost,VGH Regulator,OPA*3,Buck -Boost VGL with Temp. Compensation |
QFN5X5-32 |
|
|
8 |
14 |
750 |
5 |
24 |
30 |
200 |
Async-Boost,Async-Buck, OPA,VGON and VGOFF Regulator,GPM,VGH Temp. Compensation,I2C |
TQFN6X6-40 |
|
|
2.5 |
5.5 |
1200 |
4.5 |
18 |
-- |
-- |
Async-Boost, VGHM,VGH/VGOFF Charge-Pump |
TQFN5X5-20 |
|
|
2.5 |
5.5 |
1200 |
3 |
18 |
40 |
200 |
Async-Boost,VGH/VGL Charge-Pump, VCOM, GPM,Voltage Detector |
TQFN4X4-24 |
|
|
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 |
|
|
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 |
|
|
2.5 |
5.5 |
640/ 1200 |
2 |
20 |
12 |
150 |
Async-Boost, VGH Charge-Pump,VCOM, GPM, Voltage Detector,LDO |
TQFN4X4-24 |
|
|
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 |
|
|
2.5 |
5.5 |
640/ 1200 |
2 |
20 |
12 |
150 |
Async-Boost,VGH Charge-Pump,VCOM, GPM, Voltage Detector |
TQFN4X4-24 |
|
|
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 |
|
|
8 |
14 |
500/ 750 |
2.3 |
19 |
-- |
-- |
Async-Boost,Async-Buck,VGH/VGL,Charge-Pump |
TSSOP-28(FD) |
|
|
8 |
14 |
500/ 750 |
3 |
20 |
45 |
200 |
Async-Boost,Async-Buck, VGH/VGL Charge-Pump, GPM,VCOM,Voltage Detector,HV LDO |
TQFN7X7-48 |
|
|
9.5 |
14 |
500~ 2000 |
3.5 |
20 |
-- |
-- |
Async-Boost,Async-Buck,VGON and VGOFF Regulator |
TQFN5X5-28 |
|
|
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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