参数资料
| 型号： | UBA2071ATS/N1,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 22/35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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页
NXP Semiconductors
UBA2071; UBA2071A
Half bridge control IC for CCFL backlighting
duration longer than t spike(min) . Each spike will trigger an internal one-shot, which signals to
the control circuits that arcing has been detected. When arcing is detected, PWM dimming
is disabled and the fault timer is started.
8.14.8 Ignition Failure (IF)
When the current control loop comes close to its regulation point, the lamps are assumed
to be on (ignited). This is when the average absolute voltage on the IFB pin is above
V th(lod)(IFB) . If the lamps are not on when the ignition sweep is ?nished, (switching
frequency has reached f sw(min) ), then an ignition failure is detected, PWM dimming is
disabled and the fault timer is started.
8.14.9 The NONFAULT pin
The NONFAULT pin provides bidirectional signalling of the fault status between the IC and
any external circuit. When no fault is detected, the voltage on the pin is pulled high to
V oc(NONFAULT) by an internal current source.
An external circuit can signal to the IC that a fault has been detected by pulling a current
larger than I trig(I)NONFAULT from the NONFAULT pin. The IC will detect the current drawn
from the pin and start the fault timer. To prevent interference with the PWM dimming, the
IC will only look at the NONFAULT pin during the period when the lamp current regulation
loop is closed (when V CSWP = V CVFB ).
When the IC detects an internal fault, see Section 8.14.2 to Section 8.14.8 ), it signals this
via the NONFAULT pin by pulling the pin down (after the fault output delay time t d(o)fault) ).
At this point the IC can no longer detect the external fault. However, by then the fault timer
is already running.
NONFAULT
pin voltage
V oc(NONFAULT)
V trig(I)NONFAULT
load line
1V
in: low (active)
out: high (inactive)
0
in: high (inactive)
in: unknown
out: low (active)
NONFAULT
pin current
out: high (inactive)
I sc(NONFAULT)
I trig(I)NONFAULT
I sink(NONFAULT)
014aaa113
Fig 17. Input and output levels at the NONFAULT pin
UBA2071_A_1
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 23 June 2008
22 of 35
相关PDF资料 |
PDF描述 |
|---|---|
| UC3843ANG | IC REG CTRLR FLYBK ISO PWM 8-DIP |
| UC3844BVD1R2G | IC REG CTRLR PWM CM 8-SOIC |
| UC3845NG | IC REG CTRLR PWM CM 8-DIP |
| UCC28250PW | IC REG CTRLR PWM CM/VM 20-TSSOP |
| UCC2893D | IC REG CTRLR FLYBK ISO CM 16SOIC |
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 |
发布紧急采购，3分钟左右您将得到回复。