参数资料
| 型号： | UBA2071ATS/N1,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 18/35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 CT
UBA2071; UBA2071A
Half bridge control IC for CCFL backlighting
0
V NONFAULT
t
0
t d(o)fault
t to(fault)
t
IC in
STOP-state
014aaa110
Fig 14. Fault timer waveforms
If the fault timer is inactive, the CT pin voltage is 1 Vbe, about 0.7 V. The CT timer has a
protection that prevents the IC to start up if the CT pin is shorted to GND.
8.13 Communication
The UBA2071 and UBA2071A have a dedicated communication pin, the COMM pin, for
communicating with a slave half bridge driver (like the UBA2073), for instance for use in a
balanced half bridge driver con?guration.
Via the COMM pin, a clock signal and a signal to indicate that both half bridge powers are
to be turned off are exported and a fault signal is imported. The clock signal is a digital
signal with a low level V L(clk)(COMM) and a high level V H(clk)(COMM) . To signal that both half
bridge powers should be turned off, the voltage at the COMM pin is raised to
V O(hbswoff)(COMM) .
The UBA2071 and UBA2071A look at the current drawn from the COMM pin during the
clock high period for a hard switching signal from the slave half bridge driver. First, a
non-overlap time period t no is discarded to prevent that a capacitive load on the
communication line is seen as a signal. Then the detected current is averaged over the
clock high period before being compared to the reference level I th(det)hsw(COMM) . The
current value is sampled on the falling edge of the clock signal and held during the clock
low period. The received signal is treated as equal to an internal hard switching detection
(so PWM dimming will be disabled, switching frequency will be increased and fault timer
will be started).
When only the UBA2071 or UBA2071A is used, the COMM pin must be “not connected”.
8.14 Protections
The UBA2071 and UBA2071A have the following protections:
? OverVoltage Protection (OVP),
? OverVoltage Extra protection (OVE),
UBA2071_A_1
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 23 June 2008
18 of 35
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相关代理商/技术参数 |
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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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