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| 型号： | IRS21571DSTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 20/28页 |
| 文件大小： | 0K |
| 描述： | IC BALLAST CONTROL 600V 16SOIC |
| 标准包装： | 2,500 |
| 类型： | 镇流器控制器 |
| 频率： | 43.7 ~ 48.3 kHz |
| 电流 - 电源： | 10mA |
| 电流 - 输出： | 180mA |
| 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 |
| 包装： | 带卷 (TR) |
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IRS21571D
Sensing The DC Bus Voltage
The first of these protection pins senses the voltage on the DC bus by means of an external resistor divider and
an internal comparator with hysterisis.
When power is first supplied to the IC at system startup, 3 conditions are required before oscillation is initiated: 1.)
the voltage on the VCC pin must exceed the rising undervoltage lockout threshold (12.5V), 2.) the voltage at the
VDC pin must exceed 5.1V, and 3.) the voltage on the SD pin must be below approximately 1.85V. If a low dc bus
condition occurs during normal operation, or if power to the ballast is shut off, the dc bus will collapse prior to the
VCC of the chip (assuming the VCC is derived from a charge pump off of the output of the half-bridge). In this
case, the voltage on the VDC pin will shut the oscillator off, thereby protecting the power transistors from
potentially hazardous hard switching. Approximately 2V of hysterisis has been designed into the internal
comparator sensing the VDC pin, in order to account for variations in the dc bus voltage under varying load
conditions. When the dc bus recovers, the chip restarts from the beginning of the control sequence, as shown in
timing diagram Figure 11 below.
5
VDC
3
4
CT
8
CPH
15
LO
15
HO-VS
RUN mode
Low VDC
Restart
Figure 11: VDC pin fault and auto restart
Lamp Presence Detection and Automatic Restart
The second protection pin, SD, is used for both unlatched shutdown and automatic restart functions. The SD pin
would normally be connected to an external circuit which senses the presence of the lamp (or lamps). A example
circuit for a single lamp is shown in Figure 12.
www.irf.com
20
? 2008 International Rectifier
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相关代理商/技术参数 |
参数描述 |
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| IRS2158D | 制造商:IRF 制造商全称:International Rectifier 功能描述:Ballast control and half-bridge driver in one IC |
| IRS2158DPBF | 功能描述:功率驱动器IC Ballast Contrl IC 600V fully intgrtd RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| IRS2158DS | 制造商:IRF 制造商全称:International Rectifier 功能描述:Ballast control and half-bridge driver in one IC |
| IRS2158DSPBF | 功能描述:功率驱动器IC 3-Phase Bridge DRVR 600V 180mA 250uA RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| IRS2158DSTRPBF | 功能描述:功率驱动器IC Ballast Contrl IC 600V fully intgrtd RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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