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参数资料
| 型号： | IR21571STRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 14/18页 |
| 文件大小： | 0K |
| 描述： | IC BALLAST CONTROL INTEG 16-SOIC |
| 标准包装： | 2,500 |
| 类型： | 镇流器控制器 |
| 频率： | 45.5 ~ 50.5 kHz |
| 电流 - 电源： | 5.5mA |
| 电流 - 输出： | 500mA |
| 电源电压： | 11.4 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) |
IR21571(S) & (PbF)
Thus, for a lamp removal and replacement, the ballast
automatically restarts the lamp in the proper manner,
maximizing lamp life and minimizing stress on the
power MOSFETs or IGBTs. The SD lead contains an
enabled at the end of the preheat time. The level of
this positive-going threshold is determined by the
value of the resistor ROC. The value of the resistor
ROC is determined by the following formula:
internal 7.5V zener diode clamp, thereby reducing
the number of external components required.
Half-Bridge Current Sensing and
R OC =
V CS +
50E - 6
or
Protection
V CS + =
50E -6 - R OC
The third lead used for protection is the CS lead,
which is normally connected to a resistor in the source
of the lower power MOSFET, as shown in Figure 14.
The CS lead is used to sense fault conditions such
as failure of a lamp to strike, over-current during
normal operation, hard switching, no load, and
operation below resonance. If any one of these
conditions is sensed, the fault latch is set, the oscillator
is disabled, the gate driver outputs go low, and the
chip is put into the micropower mode. The CS lead
performs its sensing functions on a cycle-by-cycle
basis in order to maximize ballast reliability.
For the over-current, failure-to-strike, and hard
switching fault conditions, an externally
programmable, positive-going CS+ threshold is
rectifie
For the under-current and under-resonance
conditions, there is a negative-going CS- threshold
of 0.2V which is enabled at the onset of the run mode.
The sensing of this CS- threshold is synchronized
with the falling edge of the LO output.
Figures 15, 16 and 17 are oscillographs of fault
conditions. Figure 15 shows a failure of the lamp to
strike, Figure 16 shows a hard switching condition
and Figure 17 shows an under-current condition.
d
AC line
+V BUS
/ 2
VDC
CPH
RPH
RT
1
2
3
4
16
15
14
13
HO
VS
VB
VCC
R GHS
C BOOT
D BOOT
R SUPPLY
D1
Q1
1
C SNUBBER
Bridge
output
RUN
5
12
COM
C VCC
CT
DT
OC
6
7
8
11
10
9
LO
CS
SD
R GLS
R3
Q2
D2
R OC
R CS
V BUS return
Figure 15: Lamp failure to strike
Figure 14: Half-bridge current sensing circuit
connection (shaded area)
14
www.irf.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR2157S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Ballast Control. Below Resonance Protection. Thermal Overload Protection. Protection from Failure to Strike. Programmable Preheat Time and Run Frequency. Programmable Deadtime in a 16-lead SOIC Narrow package |
| IR2159 | 制造商:IRF 制造商全称:International Rectifier 功能描述:DIMMING BALLAST CONTROL IC |
| IR21591 | 制造商:IRF 制造商全称:International Rectifier 功能描述:DIMMING BALLAST CONTROL IC |
| IR21591S | 制造商:IRF 制造商全称:International Rectifier 功能描述:DIMMING BALLAST CONTROL IC |
| IR21592 | 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 |
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