The CXLE8177 is a charge pump with PWM brightness control for white LED supplies in LCD display backlight applications. The supply voltage ranges from 2.7V to 5.5V, it is ideally suited for all applications powered by a single Li-ion battery cell or three to four NiCd, NiMH, or alkaline battery cells.
The device provides a constant current for each LED, and the initial current value can be set by an external resistor. High efficiency is achieved by utilizing a 1×/1.5× fractional conversion technique in combination with very low dropout current sources.
The CXLE8177 is capable of driving up to three channels of LEDs at 30mA per channel from a 2.7V to 5.5V input. Additionally, the current controlled charge pump ensures low input current ripple and EMI. A low external part count (two 0.47μF flying capacitors and two small 1μF capacitors at VIN and VOUT) makes this part ideally suited for small, battery-powered applications
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[ CXLE8177 ]"
目录
7.相关产品
产品概述 返回TOP
The CXLE8177 is a charge pump with PWM brightness control for white LED supplies in LCD display backlight applications. The supply voltage ranges from 2.7V to 5.5V, it is ideally suited for all applications powered by a single Li-ion battery cell or three to four NiCd, NiMH, or alkaline battery cells.
The device provides a constant current for each LED, and the initial current value can be set by an external resistor. High efficiency is achieved by utilizing a 1×/1.5× fractional conversion technique in combination with very low dropout current sources.
The CXLE8177 is capable of driving up to three channels of LEDs at 30mA per channel from a 2.7V to 5.5V input. Additionally, the current controlled charge pump ensures low input current ripple and EMI. A low external part count (two 0.47μF flying capacitors and two small 1μF capacitors at VIN and VOUT) makes this part ideally suited for small, battery-powered applications.
The CXLE8177 is available in a Green, space-saving TQFN-3×3-16L package, and is rated over the -40℃ to +85℃ temperature range.
产品特点 返回TOP
• Input Voltage Range: 2.7V to 5.5V
• Drives up to 3 LEDs at 30mA Each
• LED Brightness Control Through PWM Control Signal
• High Efficiency by Fractional Conversion with 1×
and 1.5× Modes
• Switching Frequency: 1MHz
• Regulated Output Current with 0.5% Matching
• Internal Soft-Start Limits Inrush Current
• Low Input Ripple and Low EMI
• Over-Current and Over-Temperature Protection
• Under-Voltage Lockout with Hysteresis
• Green TQFN-3×3-16L Package
应用范围 返回TOP
Cellular Phones
Smart Phones
Digital Cameras
Handheld PCs
Camcorders
PDAs
Keypad Backlight
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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白光LED驱动器 |
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Product |
LED Connection |
CH |
Iq(μA) |
SHDN Iq(μA) |
Dimming |
Package |
|
CXLE8196 |
Common Anode |
1 |
60 |
1 |
PWM |
SOT-23-6 |
|
Common Anode |
4 |
100 |
1 |
PWM |
TQFN-3x3-16L |
|
|
Common Anode |
3 |
100 |
1 |
PWM |
TQFN-3x3-16L |
|
|
Common Anode |
4 |
240 |
1 |
PWM |
SOT-23-6 |
|
|
Common Anode |
4 |
100 |
1 |
One-Wire |
TQFN-3x3-16L |
|
|
Common Anode |
4 |
550 |
5 |
One-Wire |
TQFN-3x3-16L TDFN-2x2-8L MSOP-8 |
|
|
Common Cathode |
4 |
300 |
10 |
One-Wire |
TQFN-3x3-16L |
|
|
Common Anode |
6 |
210 |
1 |
One-Wire |
TQFN-3x3-16L |
|
|
Common Cathode |
6 |
300 |
10 |
One-Wire |
TQFN-4x4-16L |
|
|
Common Anode |
6 |
155 |
2.5@VIN =4.2V |
PWM |
TQFN-3x3-16L |
|
|
Common Anode |
8 |
155 |
2.5@VIN = 4.2V |
PWM |
TQFN-3x3-20L |
|
|
Common Anode |
8 |
155 |
2.5@VIN =4.2V |
One-Wire |
TQFN-3x3-20L |
|
|
Common Anode |
1 |
200 |
1 |
PWM |
TSOT-23-6 |
|
|
Common Anode |
1 |
200 |
1 |
One-Wire |
TSOT-23-6 |
|
|
Common Anode |
1 |
400 |
1 |
PWM |
TDFN-2x2-6L TSOT-23-6 |
|
|
Common Anode |
1 |
45 |
1 |
One-Wire |
TDFN-2x2-8L |
|
|
Common Anode |
1 |
200 |
1 |
PWM |
TSOT-23-6 |
|
|
Common Anode |
1 |
400 |
1 |
PWM |
TDFN-2x2-6L TSOT-23-6 |
|
|
Common Anode |
1 |
200 |
1 |
One-Wire |
TDFN-2x2-8L |
|
|
Common Anode |
1 |
200 |
1 |
PWM |
TDFN-2x2-8L |
|
|
Common Anode |
1 |
220 |
1 |
PWM |
TDFN-2x2-6L |
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