参数资料
| 型号： | UBA2071ATS/N1,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 9/35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 CFH
V CF
UBA2071; UBA2071A
Half bridge control IC for CCFL backlighting
0
V DD
V GH ? V SH
0
V DD
V GL
0
V HV
V HB
0
t no
t
t
t
t
014aaa102
Fig 5.
Oscillator, driver and half bridge voltages
8.5 Non-overlap
During each transition between the two states GL high/GH low and GL low/GH high, GL
and GH will both be low for a ?xed time t no (non-overlap time) to allow the half bridge point
to be charged or discharged by the load current (presuming the load always has an
8.6 Low-side and high-side drivers
The low-side and high-side drivers are identical. The output of each driver is connected to
the equivalent gate of an external power MOSFET. The high-side driver is supplied by the
bootstrap capacitor, which is charged from the V DD voltage via an internal diode when the
low-side power MOSFETs is on. The low-side driver is directly supplied by the V DD
voltage.
8.7 DC blocking capacitor charging
When the IC is off, either because V VDD is too low, it is disabled via the EN pin, or it
stopped after the time-out period during a fault condition, the low-side power switch
(Q LS in Figure 3 ) is turned on by making GL high. This ensures that the supply buffer
capacitor of the ?oating supply (C FS in Figure 3 ) is fully charged at start-up. As a side
effect the DC blocking capacitor (C block in Figure 3 ) will be completely discharged at
start-up. To prevent large inrush currents during the ?rst switching cycles the UBA2071
and UBA2071A can ?rst charge the DC blocking capacitor at start-up.
UBA2071_A_1
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 23 June 2008
9 of 35
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| 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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