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| 型号： | IR21592S |
| 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： | 19/25页 |
| 文件大小： | 259K |
| 代理商： | IR21592S |
IR21592/IR21593
(S)
www.irf.com
19
Once lock is achieved, the phase detector (PDET)
outputs short pulses to an open-drain PMOS that
charges the VCO capacitor through an internal
resistor (RFB) each time an error pulse occurs
(Figure 13). This action "nudges" the integrator at
the input of the VCO to keep the phase of the
output stage current exactly locked in phase with
the reference.
ν
REF
ν
FB
V
CS
t
V
VCO
t
LO
ν
ERR
Figure 13, Phase control timing diagram.
The IR21592/IR21593 includes a dimming
interface for analog lamp power control. The
DIM pin input requires a voltage in the range of
0.5 to 5VDC, with 5V corresponding to minimum
phase shift (maximum lamp power). The output
of the dim interface is the voltage on pin MIN,
which is compared with the internal timing
capacitor (CT) voltage to produce a frequency-
independent digital reference phase (Figure 14).
DIM during dimming to increase high-frequency
noise immunity and minimize component count.
Dimming (DIM)
To regulate lamp power, the error between the
reference phase and the phase of the output stage
current forces the VCO to steer the frequency in
the proper direction, as determined by the transfer
function of the output stage, such that the error is
forced to zero. An internal 15uA current source is
connected to pin VCO during dimming mode
(Figure 12) to discharge the VCO capacitor and
decrease the frequency towards lock.
3
7.6V
2
4
CPH
DIM
VCO
11
12
COM
LO
10
CS
16uA
1.6V
Q2
RCS
VCO
16
HO
Q2
15
VS
R
DIM
C
CPH
C
VCO
Half
Bridge
Output
I
LOAD
V
BUS
(+)
V
BUS
(-)
Load
Return
Half
Bridge
Driver
IR2159
DIM
INTERFACE
0.5 to 5V
PHASE
CONTROL
R
FB
VCC
FAULT
LOGIC
R
MAX
R
MIN
5
6
MAX
MIN
Figure 12, IR21592/IR21593 dimming circuitry.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR21592SPBF | 功能描述:功率驱动器IC DIMMING BALLAST CTRL 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 |
| IR21592STR | 功能描述:IC CNTRLR BALLAST DIMMING 16SOIC 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 |
| IR21592STRPBF | 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 |
| IR21593 | 功能描述:IC CTRLR BALLAST DIMMING 16-DIP 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 |
| 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 |
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