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参数资料
| 型号： | IR2159STR |
| 厂商： | International Rectifier |
| 文件页数： | 18/25页 |
| 文件大小： | 0K |
| 描述： | IC BALLAST CONTROL DIM 16-SOIC |
| 标准包装： | 2,500 |
| 类型： | 镇流器控制器 |
| 频率： | 25 ~ 95 kHz |
| 电流 - 电源： | 10mA |
| 电源电压： | 12.5 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 N |
| 包装： | 带卷 (TR) |
IR2159/IR21591 (S)
HO
LO
V BUS (+)
VS
VCO
2
VCO
16
HO
Q2
C VCO
1uA
Half
V R C S
t
1uA
PH
Half
Bridge
Driver
15
VS
Bridge
Output
I LOAD
CPH
LOGIC
V IPH
C CPH
3
7.6V
11
LO
Q2
DIM
t
0.5 to 5V
R DIM
DIM
4
FAULT
LOGIC
INTERFACE
1.6V
CS
10
RCS
I CVCO
60uA
PHASE
CONTROL
12
IR2159
COM
Load
Return
V BUS (-)
-1uA
t
Figure 9, IR2159 ignition circuitry.
V CVCO
The ignition ramp is then initiated as the capacitor
on pin VCO discharges linearly through an internal
t
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 IR2159 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).
18
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 IR2159 is reached.
If the current limit is reached, the IR2159 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.
Should the lamp ignite, the frequency continues
to decrease until the voltage on pin VCO reaches
VDIMTH, corresponding to the minimum operating
frequency set by the external resistor on pin FMIN,
www.irf.com
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| IR2161 | 制造商:International Rectifier 功能描述: |
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