参数资料
| 型号： | UBA2071ATS/N1,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 12/35页 |
| 文件大小： | 0K |
| 描述： | IC DVR HALF BRIDGE 24-SSOP |
| 标准包装： | 1,000 |
| 类型： | CCFL/EEFL 控制器 |
| 频率： | 38 ~ 42kHz |
| 电流 - 电源： | 1.5mA |
| 电源电压： | 14V |
| 工作温度： | -25°C ~ 100°C |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 带卷 (TR) |
| 其它名称： | 935285777118 |
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NXP Semiconductors
V lamp
(V)
V ign
V burn
(2)
UBA2071; UBA2071A
Half bridge control IC for CCFL backlighting
(1)
f sw(min) f reg f ign
f sw(max)
f (kHz)
014aaa103
(1) Indicates lamp-OFF.
(2) Indicates lamp-ON.
Fig 8.
Initial ignition of cold cathode ?uorescent lamp via frequency sweep and load
resonance
Advantage of the sweep rather than a ?xed ignition frequency is that sensitivity for spread
in resonance frequency is much lower.
Once the lamps are ignited the frequency sweep-down continues, gradually increasing the
lamp current (the resonance circuit should now still be inductive, so current increases as
frequency drops) until the current regulation level is reached (at f sw = f reg ). The frequency
will not reach f sw(min) if the lamp current comes into regulation. Once it has been detected
that the lamps are on (if the average absolute voltage at the current feedback input (pin
The initial ignition frequency sweep and the PWM generator are not synchronized. Once
the regulation frequency is reached, PWM dimming can start anywhere in its cycle. A
small internal PWM dimming enable delay time, t d(en)PWM , allows the lamps to settle
before PWM dimming starts.
At the start of the lamps-off period of the PWM dimming, the switching frequency is swept
up to f sw(max) . This reduces the lamp voltage so the lamps go out. If f sw(max) is reached,
both GL and GH are made low, so both half bridge powers will be non-conducting. This is
UBA2071_A_1
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 23 June 2008
12 of 35
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UBA2071T | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Half bridge control IC for CCFL backlighting |
| UBA2071T/N1,118 | 功能描述:显示驱动器和控制器 Half brdg control IC for CCFL bcklighting RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| UBA2071TS | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Half bridge control IC for CCFL backlighting |
| UBA2071TS/N1,118 | 功能描述:显示驱动器和控制器 Half brdg control IC for CCFL bcklighting RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| UBA2072T/N1,518 | 功能描述:显示驱动器和控制器 L-VOLT FULL-BRG CNTR IC FOR CCFL BCKLIGHT RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
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