参数资料
| 型号： | UBA2071ATS/N1,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 6/35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
UBA2071; UBA2071A
Half bridge control IC for CCFL backlighting
Table 3.
Pin description …continued
Symbol
Pin
Description
Function
NONFAULT 12
status signal
input/output
The IC signals a fault condition to external circuits by pulling this pin low. Also
external circuits can signal a fault condition to the IC by pulling this pin low.
PWMD
13
digital PWM dimming
input/output
Digital output of internally generated PWM signal if a capacitor is connected
to the CPWM pin.
Digital input of PWM signal if the CPWM pin is connected to signal ground.
Remark: The signal on the PWMD pin is active low, so low voltage on the
PWMD pin means lamps are on.
PWMA
EN
14
15
analog PWM dimming
input
chip enable input
The duty cycle of the internally generated PWM signal is proportional to the
voltage on this pin.
A low voltage on this pin will reset and shut down the IC. This pin is also used
to select between DC blocking capacitor charging mode and normal
operation.
VDD
PGND
GL
n.c.
n.c.
n.c.
SH
FS
16
17
18
19
20
21
22
23
supply input
power ground
low-side driver output
not connected
not connected
not connected
high-side source
connection
?oating supply
A buffer capacitor must be connected between this pin and power ground.
return for the low-side driver.
Gate connection of the low-side power switch.
HV spacer pin.
HV spacer pin.
HV spacer pin.
Return for high side gate driver. Must be connected to the source of the
high-side half bridge power switch.
A buffer capacitor must be connected between this pin and the SH pin. This
capacitor is charged when the low-side power switch is on and supplies the
high-side driver when the high-side power switch is on.
GH
24
high-side driver output
Gate connection of the high-side half bridge power switch.
8. Functional description
The UBA2071 and UBA2071A are designed to drive a half bridge inverter (as shown in
EEFLs.
The IC has an AC lamp current sense input (IFB). It regulates the average absolute value
of the lamp current by varying its switching frequency. The load is presumed to be
inductive: higher frequency results in lower lamp current.
The UBA2071 and UBA2071A include a PWM dimming function. The ICs switch the
lamps on and off with a frequency lower than the lamp current frequency but higher than
what the human eye can see. The light output of the lamps can be set by setting the ratio
of the on-time and off-time.
These ICs have several forms of protection and the next chapters will describe each
function in more detail.
UBA2071_A_1
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 23 June 2008
6 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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