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| 型号： | IRS21571DSTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 22/28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
Half-Bridge Current Sensing and Protection
The third pin used for protection is the CS pin, which is normally connected to a resistor in the source of the lower
power MOSFET, as shown in Figure 14.
The CS pin is used to sense fault conditions such as failure of a lamp to strike, over-current during normal
operation, hard switching, no load, and operation below resonance. If any one of these conditions is sensed, the
fault latch is set, the oscillator is disabled, the gate driver outputs go low, and the chip is put into the micropower
mode. The CS pin performs its sensing functions on a cycle-by-cycle basis in order to maximize ballast reliability.
rectifie
d
AC line
+V BUS
VDC
HO
1
16
Q1
1 /
CPH
RPH
RT
2
3
15
14
VS
VB
VCC
R GHS
C BOOT
D BOOT
R SUPPLY
D1
2
C SNUBBER
Bridge
output
4
13
RUN
5
12
COM
C VCC
CT
LO
DT
6
11
CS
R GLS
Q2
D2
7
10
R3
OC
R OC
8
9
SD
R CS
V BUS return
Figure 14: Half-bridge current sensing circuit connection (shaded area)
For the over-current, failure-to-strike, and hard switching fault conditions, an externally programmable, positive-
going CS+ threshold is enabled at the end of the preheat time. The level of this positive-going threshold is
determined by the value of the resistor R OC . The value of the resistor R OC is determined by the following formula:
R OC =
V CS+ ,
50E - 6
or
V CS + = 50E - 6 ? R OC
For the under-current and under-resonance conditions, there is a negative-going CS- threshold of 0.2V which is
enabled at the onset of the run mode. The sensing of this CS- threshold is synchronized with the falling edge of
the LO output.
Figures 15, 16 and 17 are oscillographs of fault conditions. Figure 15 shows a failure of the lamp to strike, Figure
16 shows a hard switching condition and Figure 17 shows an under-current condition.
www.irf.com
22
? 2008 International Rectifier
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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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