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| 型号： | UBA2071AT/N1,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 1/35页 |
| 文件大小： | 0K |
| 描述： | IC DVR HALF BRIDGE 24-SOIC |
| 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-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SO |
| 包装： | 带卷 (TR) |
| 其它名称： | 935285776118 |
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UBA2071; UBA2071A
Half bridge control IC for CCFL backlighting
Rev. 01 — 23 June 2008
Product data sheet
1. General description
The UBA2071 and UBA2071A are high voltage ICs intended to drive Cold Cathode
Fluorescent Lamps (CCFLs) or External Electrode Fluorescent Lamps (EEFLs) for
backlighting applications. They can drive a half bridge circuit made up of two NMOSFETs
with a supply voltage of up to 550 V, so the inverter can be supplied directly from a 400 V
PFC bus.
The UBA2071 and UBA2071A contain a controller, a level shifter, a bootstrap diode and
drivers for the external half bridge power switches. It also contains a low frequency PWM
generator, which can be used to control the brightness level of the lamps, using an analog
brightness/dimming control voltage. PWM dimming can also be realized, using a digital
PWM input signal. PWM dimming can be synchronized with other ICs. The lamp current is
controlled by means of a true zero voltage switching resonant control principle, ensuring
lowest possible switch losses in the half bridge power structure.
The UBA2071 is designed to be supplied by a ? V/ ? t supply from the half bridge circuit that
it drives. The IC itself needs little current and if the IC is off, a clamp protects the supply
voltage from getting too high.
The UBA2071A is designed to be supplied by a ?xed 12 V supply. It has a lower supply
start voltage and no supply clamp.
2. Features
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Suitable for operating in a very wide inverter supply voltage range (up to 550 V DC).
Integrated level shifter.
Integrated bootstrap diode.
Lamp current control by means of a true zero voltage switching resonant control
principle.
Sample & Hold circuit, maintaining current control value during PWM lamp-off
situation.
Separately de?nable time constants for current control loop and PWM dimming
attack/decay setting.
Overvoltage control.
Overcurrent protection.
Ignition failure detection.
Hard switching control.
Arcing detection.
Open/short pin protections on feedback pins.
Integrated, programmable fault timer.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UBA2071ATS | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Half bridge control IC for CCFL backlighting |
| UBA2071ATS/N1,118 | 功能描述:显示驱动器和控制器 CCFL DRVR 14V 24-Pin 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 |
| 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 |
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