参数资料
型号: IRS2158DSPBF
厂商: International Rectifier
文件页数: 24/30页
文件大小: 0K
描述: IC DVR HALF BRIDGE 600V 16-SOIC
标准包装: 45
类型: 荧光灯驱动器
频率: 42.5 ~ 48.5 kHz
电流 - 电源: 3.5mA
电流 - 输出: 260mA
电源电压: 11.5 V ~ 15.6 V
工作温度: -40°C ~ 125°C
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC N
包装: 管件
产品目录页面: 1382 (CN2011-ZH PDF)
配用: IRPLDIM3-ND - KIT DES FLUOR BALLAST IRS2158D
IRS2158D(S)
Ballast Design Equations
Note: The results from the following design equations can differ slightly from actual measurements due to IC
tolerances, component tolerances, and oscillator over- and under-shoot due to internal comparator response
time.
Step 1: Program Deadtime
The deadtime is programmed with the timing resistor RDT at the DT pin. The deadtime is given by:
t DT = 1500 ? C T
[Seconds]
(1)
C T =
t DT
1500
[Farads]
(2)
Step 2: Program Run Frequency
The run frequency is programmed with the timing resistor RMIN at the FMIN pin. The run frequency is
given as:
2 . 15 ? C T ? ? ? R MIN + 1500 ?
[Hz] (3)
f OSCRUN =
? 3 ?
? 5 ?
1
R MIN = ? ? ?
? 1500 ? ?
5 ? 1
3 ? ( 2 . 15 ? f OSCRUN ? C T )
?
?
[Ohms]
(4)
Step 3: Program Preheat Frequency
The preheat frequency is programmed with timing resistors RMIN and RPH. The timing resistors are
connected in parallel for the duration of the preheat time. The preheat frequency is therefore given as:
2 . 15 ? C T ? ? ? ?
+ 1500 ? ?
[Hertz]
(5)
f OSCPH =
1
? 3 ( R MIN ? R PH )
? 5 ( R MIN + R PH )
?
?
Step 4: Program Preheat Time
The preheat time is defined by the time it takes for the external capacitor on pin CPH to charge up to
2/3*VCC. An external resistor (RCPH) connected to VCC charges capacitor CPH. The preheat time is
therefore given as:
www.irf.com
t PH = R CPH ? C PH
or
24
[Seconds] (6)
? 2009 International Rectifier
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