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诠鼎集团力推AATI NB/Netbook PC & Monitor白光LED背光源 解决方案

 2009-07-15
研诺逻辑科技(Advanced Analogic Technologies,AATI)提供较大阵列电源解决方案给白光LED 背光源包含voltage output charge pumps and regulated current output charge pumps 。 提供低成本液晶显示控制板backlighting 应用使用。 提供恒流源控制白光LEDs。 在提供一恒定电流给白光LED,当不同的LEDs 有不同的forward电压都可以透过AATI 白光LED控制气器 达到相同的亮度。

AAT1408/AAT1406/AAT1404 NB/Netbook PC & Monitor Backlight
AAT1408 特性
Up to 80 WLEDs
Wide VIN Range: 4.5V-6.0V and 6.0V-26.0V
2/3/4 Cell Li-ion Battery Packs
AC/DC Adapters, Cigarette Lighter Adapters
Highly Integrated Solution
Constant Current Boost Controller
Integrated Lateral Trench High Voltage MOSFET
Up to 10 Series WLED
±2% Accuracy
40V Current Sinks (mismatch is ok)
Up to 8 Parallel WLED Strings
±2% Matching
Up to 30mA/String (combining or disabling is ok)
3 x 4 mm QFN34-24 Low Profile Package
Switching Frequency Options
650kHz or 1300kHz for Efficiency / Size Tradeoff
Synchronization Input Pin
RSET Programs Maximum Current
Suports Intel DPST Dimming
PWM Direct Dimming Input
Up to 1,000:1 Dimming Range (100Hz)
Up to 50kHz Dimming Frequency (prevents audio interference)
Fast ON/OFF
PWM Digital Dimming Input (S2C or SMBus)
256-Linear Step provides 256:1 Range
10kHz Pre-set PWM Frequency
Fault Protection
Open/Short LED, Over-voltage, Over-temperature, Over-current
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AAT2822/3
PANEL POWER SOLUTION INC VCOM BUFFER & WLED DRIVER
LCD Bias Power
 2.5V to 5.5V Input Supply Range
 1.3MHz Fixed Frequency Current-Mode Step-Up
 Regulator
–Fast Transient Response
–Adjustable Voltage up to 13.2V
–±1% Typical Accuracy
–High Efficiency (93%) at output current 50mA
Positive Output, VGH
Up to 13.2V Input Supply (VINP)
Adjustable Voltage up to 30V/10mA(max)
 ±3% Typical Accuracy
Negative Output, VGL
Up to 13.2V Input Supply (VINN)
Adjustable Voltage down to -30V/10mA(max)
± 3% Typical Accuracy
WLED Driver
Input Voltage Range: 2.7V to 5.5V
Maximum Continuous Output 12V @ 260mA
 Panels sizes from 5” – 10”
–5.0”→ 3S5P
–5.6”→ 3S6P
–7.0”→ 3S9P
–8.0”→ 3S10P/11P
–10”→ 3S13P
Constant LED Current with 6% Accuracy
PWM Dimming Control
 Up to 1kHz
1.3MHz Switching Fixed Frequency
Up to 90% Efficiency
VCOM Buffer
High-Performance
 13V/µs Slew Rate
 12MHz, -3dB Bandwidth
±150mA Output Short-Circuit Current
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AAT1404 : 4 Channel HV LED Driver
Features
Up to 40 WLEDs
Wide VIN Range: 4.5V-6.0V and 6.0V-26.0V
2/3/4 Cell Li-ion Battery Packs
AC/DC Adapters, Cigarette Lighter Adapters
Highly Integrated Solution
Constant Current Boost Controller
Integrated Lateral Trench High Voltage MOSFET
Up to 10 Series WLED
±2% Accuracy
40V Current Sinks (mismatch is ok)
Up to 4 Parallel WLED Strings
±2% Matching
Up to 60mA/String (combining or disabling is ok)
3 x 4 mm QFN34-24 Low Profile Package

Applications
• Monitors
• Notebook PC
• DVP Players
• Portable TVs
• Navigation panels
• Large panel displays

Switching Frequency Options
650kHz or 1300kHz for Efficiency / Size Tradeoff
Synchronization Input Pin
RSET Programs Maximum Current
PWM Direct Dimming Input
Up to 1,000:1 Dimming Range (100Hz)
Up to 50kHz Dimming Frequency (prevents audio interference)
Fast ON/OFF
PWM Digital Dimming Input (S2C or SMBus)
256-Linear Step provides 256:1 Range
10kHz Pre-set PWM Frequency
Fault Protection
Open/Short LED, Over-voltage, Over-temperature, Over-curren
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