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参数资料
| 型号： | IR21593 |
| 厂商： | International Rectifier |
| 英文描述： | DIMMING BALLAST CONTROL IC |
| 中文描述： | 调光镇流器控制IC |
| 文件页数： | 18/25页 |
| 文件大小： | 259K |
| 代理商： | IR21593 |
IR21592/IR21593
(S)
18
www.irf.com
circuit measures the voltage at the CS pin and
compares it against the voltage at the IPH pin.
During the rising ignition ramp, the voltage at
the IPH pin is increased to 20% above its value
5.1V
V
CPH
V
VCO
t
t
PH
IGN
DIM
V
DIM
R
& C
TIME CONSTANT
IGN-TO-DIM
TIME
Figure 10, IR21592/IR21593 ignition detection.
during preheat mode. When the voltage on the
CS pin exceeds this voltage, the voltage on the
IPH pin is decreased to VIPH Pre-Heat +10% and
the ignition detection circuit is then active (See
Figure 10). When the lamp ignites, the voltage on
the CS pin will then fall below the voltage on the
IPH pin and the IC enters DIM Mode and the phase
control loop is closed. In order for the ignition
detection circuit to function properly and for the IC
to enter DIM mode, the voltage on the CS pin must
first rise above VIPH Pre-Heat + 20% during the
ignition ramp to activate the circuit, and then
decrease below VIPH Pre-Heat +10% when the lamp
ignites.
Ignition-to-Dim (IGN-to-DIM)
When the IR21592/IR21593 enters dim mode, the
phase control loop is closed and the phase of the
load current is regulated against the user control
input on pin DIM. To control the rate at which the
dim setting changes from maximum brightness
to the user setting (IGN-TO-DIM time, Figure 11),
pin DIM is connected internally to pin CPH when
the IR21592/IR21593 enters DIM mode. The
resistor on pin DIM (RDIM) discharges the
capacitor on pin CPH down to the user dim
setting. The resistor can be selected for a fast
time constant to minimize the amount of flash
visible over the lamp just after ignition, or, a
long time constant such that the brightness
ramps down smoothly to the user setting. Should
the ignition-to-dim time be too fast, however, the
loop can respond faster than the ionization
constant of the lamp (milliseconds) causing the
VCO to over-shoot. This can result in a
frequency that is higher than the minimum
brightness frequency and can extinguish the
lamp. The capacitor on pin CPH serves multiple
functions by setting the preheat time, the travel
rate just after ignition (together with resistor
RDIM), and, serving as a filter capacitor on pin
Figure 11, IR21592/IR21593 ignition timing diagram.
V
IPH
V
IPH
+ 20%
V
IPH
+ 10%
CS
PH
IGN
DIM
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| IR2166 | RES 560 OHM 1/10W 5% SM |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR21593PBF | 功能描述:功率驱动器IC Dim Ballast Cntrl 1.8us Deadtime 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 |
| IR21593PBF | 制造商:International Rectifier 功能描述:Controller IC Output Voltage Max.:20V |
| IR21593S | 功能描述:IC CTRLR BALLAST DIMMING 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 |
| IR21593SPBF | 功能描述:功率驱动器IC DIMMING BALLAST CTRL 600V 0.5 to 5V DC 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 |
| IR21593STRPBF | 功能描述:LED显示驱动器 Dim Ballast Cntrl 1.8us Deadtime RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
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