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| 型号： | IR21571 |
| 厂商： | International Rectifier |
| 英文描述： | FULLY INTEGRATED BALLAST CONTROL IC |
| 中文描述： | 完全集成的镇流器控制IC |
| 文件页数： | 13/17页 |
| 文件大小： | 234K |
| 代理商： | IR21571 |
IR21571
(S)
www.irf.com
13
Figure 11: VDC lead fault and auto restart
Lamp Presence Detection and
Automatic Restart
The second protection lead, SD, is used for both
unlatched shutdown and automatic restart functions.
The SD lead would normally be connected to an
external circuit which senses the presence of the
lamp (or lamps), as shown in Figure 12.
When the SD lead exceeds 2.0V (approximately
150mV of hysteresis is included to increase noise
immunity), signaling either a lamp fault or lamp
removal, the oscillator is disabled, both gate driver
outputs are pulled low, and the chip is put into the
micropower mode. Since a lamp fault would normally
lead to a lamp exchange, when a new lamp is
inserted into the fixture, the SD lead would be pulled
back to near the ground potential. Under these
Figure 12: Lamp presence detection circuit
connection (shaded area)
conditions a reset signal would restart the chip from
the beginning of the control sequence, as shown in
the timing diagram in Figure 13.
Figure 13: SD lead fault and auto restart
RUN mode
Low VDC
CT
4
VDC
3
5
CPH
8
LO
15
HO-VS
15
Restart
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
I
VDC
CPH
RPH
RT
RUN
CT
DT
OC
LO
COM
VCC
VB
VS
HO
SD
CS
+ V
BUS
+ rectified
AC Line
V
BUS
return
C
BS
D
BOOT
R
Supply
C
VCC
R
CS
L
RES
C
RES
R
GHS
R
GLS
C
BLOCK
C
SNUBBER
R4
R3
R5
C2
D1
D2
RUN mode
SD mode
CT
4
CPH
8
LO
15
HO-VS
15
Restart
SD
2
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相关代理商/技术参数 |
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| IR21571PBF | 功能描述:功率驱动器IC Ballast Cntrl Thrml Ovrload Prot 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 |
| IR21571PBF | 制造商:International Rectifier 功能描述:Controller IC Output Voltage Max.:25V |
| IR21571S | 功能描述:IC BALLAST CONTROL 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 照明，镇流器控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:CCFL 控制器 频率:40 ~ 80 kHz 电流 - 电源:5mA 电流 - 输出:- 电源电压:4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°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) 其它名称:90-3991V+V01 |
| IR21571SPBF | 功能描述:功率驱动器IC BALLAST CTRL BELO 600V 15.6V VCC 150uA 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 |
| IR21571STR | 功能描述:IC BALLAST CONTROL INTEG 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 照明，镇流器控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:CCFL 控制器 频率:40 ~ 80 kHz 电流 - 电源:5mA 电流 - 输出:- 电源电压:4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°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) 其它名称:90-3991V+V01 |
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