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参数资料
| 型号： | IR2159S |
| 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： | 17/25页 |
| 文件大小： | 267K |
| 代理商： | IR2159S |
IR21592/IR21593
(S)
www.irf.com
17
60uA
-1uA
t
t
t
t
V
CVCO
I
CVCO
V
RCS
VS
LO
HO
V
IPH
Figure 8, Peak load current regulation timing diagram.
This feedback keeps the peak preheat current
regulated to the user-programmable setting on pin
IPH for the duration of the preheat time. An
internal current source connected to an external
resistor on pin IPH sets a voltage reference for
the peak pre-heat current. The pre-heat time
continues until the voltage on pin CPH exceeds
5V.
Ignition (IGN)
The IR21592/IR21593 enters ignition mode when
the voltage on pin CPH exceeds 5V. The peak
current regulation reference voltage is
disconnected from the user-programmable
setting on pin IPH and is connected to a higher
internal threshold of 1.6V (Figure 9).
3
7.6V
2
1uA
4
CPH
DIM
VCO
11
12
COM
LO
10
CS
1uA
1.6V
Q2
RCS
VCO
LPH
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
IR21592/IR21593
DIM
INTERFACE
0.5 to 5V
PHASE
CONTROL
FAULT
LOGIC
Figure 9, IR21592/IR21593 ignition circuitry.
The ignition ramp is then initiated as the
capacitor on pin VCO discharges linearly
through an internal 1uA current source. The
frequency decreases linearly towards the
resonance frequency of the high-Q ballast output
stage, causing the lamp voltage and load current
to increase (Figure 10). The frequency
continues to decrease until the lamp ignites or
the current limit of the IR21592/IR21593 is
reached. If the current limit is reached, the
IR21592/IR21593 enters FAULT mode. The 1.6V
threshold together with the external current
sensing resistor on pin CS determine the
maximum allowable peak ignition current (and
therefore peak ignition voltage) of the ballast
output stage. The peak ignition current must not
exceed the maximum allowable current ratings
of the output stage MOSFETs or IGBTs, and,
the
resonant inductor must not saturate at
any time.
To prevent a "flash" across the lamp during
ignition at low dim settings, an ignition detection
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| IR2159STR | 功能描述:IC BALLAST CONTROL DIM 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 |
| IR2161 | 制造商:International Rectifier 功能描述: |
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| IR2161S | 制造商:International Rectifier 功能描述: |
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