参数资料
| 型号： | IRPLCFL5U |
| 厂商： | International Rectifier |
| 文件页数： | 10/15页 |
| 文件大小： | 0K |
| 描述： | KIT DESIGN CFL BALLAST 120VAC |
| 标准包装： | 1 |
| 其它名称： | *IRPLCFL5U |
IRPLCFL5U
7.2. Open Filaments Protection
The open filament protection relies on the non-ZVS circuit of the IR2520D, enabled when pin VCO
reaches 4.6V. Should an open filament lamp fault occur, hard-switching will occur at the half-bridge
and the non-ZVS circuit inside the IR2520D will detect this condition, increase the frequency each
cycle and shut down when VCO decreases below 0.85V; both gate driver outputs will be latched
‘low’. This will prevent hard-switching and damaging of the half-bridge MOSFETs.
Fig. 7.3 shows the VCO pin and VS pin at the shutdown with open filament. As you can see, at start-
up the VCO pin charges from 0V up to 4.6V, at 4.6V the non-ZVS circuit is enabled, CVCO dis-
charges and the frequency increases. When the voltage at the VCO pin decreases below 0.85V we
have latched shutdown. Fig. 7.4 shows the voltage at the VCO pin (HB Voltage) at the shutdown
with a shorter time scale. The FMIN pin can be used as trigger as this pin transitions from 5V to
COM when the IC enters fault mode or UVLO-.
Fig. 7.3: 3 is the voltage in pin VCO and 2 is pin VS
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相关代理商/技术参数 |
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| 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 |
| IRPLDIM1E | 功能描述:KIT BALLAST DIMMING 230VAC 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 |
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