参数资料
| 型号： | IRPLCFL5E |
| 厂商： | International Rectifier |
| 文件页数： | 14/15页 |
| 文件大小： | 0K |
| 描述： | KIT DESIGN CFL BALLAST 220VAC |
| 标准包装： | 1 |
| 其它名称： | *IRPLCFL5E |
IRPLCFL5E
9. Design Procedure to adapt the design to different lamps types
Designing with the IR2520D is very simple because it only has 2 control pins: VCO (0-5VDC oscil-
lator voltage input) and FMIN (minimum frequency setting). To modify the design for a higher lamp
power, you will need to modify RFMIN, CVCO, LRES and CRES. Make sure that the FETs and
inductors are rated for the current you need with the new lamp and that VCC is stable. To modify the
design to a lower lamp power, you will need to decrease RFMIN and, in some cases, to also modify
CVCO, LRES and CRES. In most cases you can use FETs and inductors with lower current ratings.
The FMIN pin is connected to ground through a resistor (RFMIN). The value of this resistor programs
the minimum frequency (fmin) of the IC and the starting frequency of the IC (about 2.5xfmin). The
IR2520D will work in run mode at the minimum frequency unless non-ZVS is detected. Generally, to
work with constant frequency, the minimum frequency needs to be chosen above the resonant
frequency of the low-Q R-C-L circuit. In this case, one can increase the value of RFMIN to decrease
the frequency and increase the lamp power, or, decrease the value of RFMIN to increase the run
frequency and decrease the lamp power.
The VCO pin is connected to ground through a capacitor (CVCO). The value of this capacitor
programs the time the frequency needs to ramp down from 2.5 times fmin (fmax) to fmin. One can
increase the capacitor value to increase the preheat time, or, decrease the capacitor value to de-
crease the preheat time.
The suggested design procedure is as follows:
1) Use the Ballast Design Assistant (BDA) software to calculate LRES and CRES.
Select the input configuration without PFC, select the IR2156 IC and select single lamp current
mode configuration. Select the new lamp in the database or add the lamp parameters by hand
selecting the “Advanced” option.
Calculate the operating point and chose the right values of L and C that satisfy:
1.1) Run frequency (best working range) 40-50KHz
1.2) C as small as possible to minimize losses (suggested value 4.7nF)
1.3) L values you have available
2) While measuring LO, apply 15V between the VCC pin and the COM pin and adjust the value
of RFMIN to obtain the right minimum frequency (it is suggested set fmin = run frequency
obtained with the BDA software). Increase RFMIN to decrease the minimum frequency or
decrease RFMIN to increase the minimum frequency.
3) Apply the AC input and check preheat, ignition and run states of the lamp.
3.1) If the lamp ignites during preheat, the preheat current is too small or the starting voltage
across the lamp is too big, increase the value of CRES to decrease the voltage across
14
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相关PDF资料 |
PDF描述 |
|---|---|
| IRPLCFL5U | KIT DESIGN CFL BALLAST 120VAC |
| IRPLCFL8U | KIT DES FLUOR BALLAST IRS2530D |
| IRPLDIM1U | BALLAST DIMMING 32W/T8 120VAC |
| IRPLDIM2E | KIT BALLAST DIM DIG 230VAC |
| IRPLDIM2U | BALLAST DIM DIG 32W/T8 120VAC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IRPLCFL5U | 功能描述:KIT DESIGN CFL BALLAST 120VAC RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
| IRPLCFL7U | 制造商:International Rectifier 功能描述:9999V 999.000A OTHER - Boxed Product (Development Kits) |
| IRPLCFL8U | 功能描述:电源管理IC开发工具 3 lvl Dim CFL Fluor Ballast w/IRS2530D RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRPLCFL9U | 功能描述:电源管理IC开发工具 3 lvl Dim CFL Fluor Ballast Ref dsgn RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRPLDIM1 | 制造商:IRF 制造商全称:International Rectifier 功能描述:Dimming Ballast Control IC Design Kit |
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