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参数资料
| 型号： | IR2167STRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 24/33页 |
| 文件大小： | 0K |
| 描述： | IC PFC BALLAST CTLR 20-SOIC |
| 标准包装： | 1,000 |
| 类型： | PFC/镇流器控制器 |
| 频率： | 41 ~ 47 kHz |
| 电流 - 电源： | 10mA |
| 电源电压： | 11.4 V ~ 15.6 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC（宽型） |
| 包装： | 带卷 (TR) |
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IR2167(S) & PbF
ment, the ballast automatically restarts the lamp in the proper
man ner.
VDC
5
3
In the Run mode there are two additional thresholds
enabled on the SD pin: 1V and 3V. These thresholds form a
window and during normal lamp running the voltage
appearing at the SD pin is maintained within these two levels.
As a lamp nears its end-of-life, its running voltage will
CT
4
increase and the signal applied to the SD pin detects this by
exceeding the window threshold width. The oscillator is
disabled, both gate driver outputs are pulled low, and the
chip is put into the micropower mode.
8
CPH
+ rectified
AC Line
+ V BUS
VDC
1
20
HO
LO
15
CPH
RPH
RT
2
3
4
19
18
17
VS
VB
VCC
R GHS
C BS
D BOOT
R Supply
D1
C BLOCK L RES
C SNUBBER
RUN
CT
5
6
16
15
COM
LO
C VCC
D2
C RES
15
HO-VS
DT
OC
7
8
14
13
CS
SD
R3
R GLS
D3
R4
R5
R6
COMP
9
12
PFC
ZX
10
VBUS
11
C2
R CS
C4
R7
C3
RUN mode
Low VDC
Restart
V BUS return
Figure 16: VDC lead fault and auto restart
Lamp Presence and End-of-Life Detection
The second protection pin, SD, is used for both shutdown
and end-of-life detection. The SD pin would normally be
connected to an external circuit that senses the presence
of the lamp(s) and the voltage appearing across the lamp(s).
An example circuit for a single lamp is shown in Figure 17.
During all modes of operation if the SD pin exceeds 5.1V
(approximately 150mV of hysterisis is included to increase
noise immunity), signaling either a lamp fault or lamp re-
moval, the oscillator is disabled, both gate driver outputs are
pulled low, and the chip is put into the micropower mode.
Since a lamp fault would normally lead to a lamp exchange,
when a new lamp is inserted in the fixture, the SD pin would
be pulled back to near ground potential. Under these condi-
tions a reset signal would restart the chip from the begin-
ning of the control sequence, as shown in the timing dia-
gram in Figure 18. Thus, for a lamp removal and replace-
24
Figure 17: Lamp presence detection circuit connection
(shaded area)
www.irf.com
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