参数资料
型号: UBA2015AT/1,118
厂商: NXP Semiconductors
文件页数: 15/42页
文件大小: 0K
描述: IC LAMP DVR FLUORES 600V 20-SOIC
产品培训模块: Fluorescent Lamp Electronic Ballasts
High Frequency Fluorescent Lighting Ballasts IC Family
标准包装: 1
类型: CFL/TL 驱动器
电流 - 电源: 1.7mA
电源电压: 11.9 V ~ 13.8 V
工作温度: -40°C ~ 125°C
封装/外壳: 20-SOIC(0.295",7.50mm 宽)
供应商设备封装: 20-SO
包装: 标准包装
其它名称: 568-8538-6
NXP Semiconductors
UBA2016A/15/15A
600 V fluorescent lamp driver
7.4.7.1
Lamp current control and dimming
The AC lamp current is sensed by an external resistor connected to pin IFB. The resulting
AC voltage on pin IFB is internally Double-Side Rectified (DSR), and compared to a
reference level by an OTA. This reference level is determined by the internal reference
regulation level V reg(ref) and the voltage on the DIM input (UBA2015A and UBA2016A
Definition: the regulation voltage on pin IFB (V reg(IFB) ) is the level seen from outside the IC
to which the IC will try to regulate the average absolute voltage on pin IFB.
If the DIM input is not present or not connected or V DIM > V reg(ref) then V reg(IFB) is
V reg(ref) + non-idealities from the OTA and the DSR else V reg(IFB) = V DIM + non-idealities
from OTA and DSR.
For the UBA2016A V reg(IFB) also depends on the input current on pin BOOST (I BOOST ).
The boost current is multiplied and added to the OTA output current which translates to an
extra voltage being added to V reg(ref) . See Section 7.4.7.3 “Boost” for further detail about
the boost function. For the remainder of this Section we will assume I BOOST = 0.
For the UBA2015A and UBA2016A the DIM input controls the lamp current set point. The
DIM input level is internally clamped to V reg(ref) . The lowest possible DIM input level is set
by the bias current on pin DIM I bias(DIM) and the external resistance on the pin. If no
dimming is required, pin DIM can be left open or connected via a capacitor to ground. The
internal current source I bias(DIM) will then charge the pin until it is internally clamped to
V reg(ref) .
UBA2016A_15_15A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 16 November 2011
? NXP B.V. 2011. All rights reserved.
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