参数资料
型号: UBA2071ATS/N1,118
厂商: NXP Semiconductors
文件页数: 13/35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
NXP Semiconductors
f sw
max
f ign
f reg
min
ignition
UBA2071; UBA2071A
Half bridge control IC for CCFL backlighting
0
ov
V sec
0
max
V CVFB
V CVFB
t
t
V CIFB
V CSWP
V PWMD
0
0
V CIFB
V CSWP
t
t
nom
I lamp
0
initial
ignition
sweep
PWM-enable delay
steady-state
t
014aaa104
Fig 9.
Initial ignition frequency sweep and PWM dimming frequency sweep signals
The lamps start switching again on period GL and GH and the frequency is swept back to
the regulation frequency f reg . The duration of the PWM frequency sweep is inverse
proportional to the capacitor connected to the CSWP pin.
8.9 Overvoltage control
The overvoltage control circuit is intended to prevent the transformer output voltage from
exceeding its maximum rating. It can also be used to regulate the output voltage to the
required lamp ignition voltage.
Under normal circumstances the capacitor at the CVFB pin is charged by a constant bias
current I ch(CVFB) , thus the voltage on the CVFB pin will increase resulting in a decrease of
switching frequency. If the IC is in current regulation this bias current will ?ow away via a
tracking circuit which makes the voltage on the CVFB pin following the voltage on the
CIFB pin, see Figure 11 .
UBA2071_A_1
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 23 June 2008
13 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