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參數(shù)資料
| 型號： | IRS2540 |
| 廠商： | International Rectifier |
| 英文描述： | IRPLLED1 High Voltage LED Driver using the IRS2540 |
| 中文描述： | IRPLLED1高電壓LED驅(qū)動器采用IRS2540 |
| 文件頁數(shù)： | 16/28頁 |
| 文件大小： | 839K |
| 代理商： | IRS2540 |
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16
RD-0608
www.irf.com
R
S3
%
10
ratio
duty
min
≈
(
)
(
)
3
2
14
1
1
2
1
max
S
Bus
R
V
V
W
=
(
)
(
)
(
) (
)
W
V
V
W
V
V
1
R
Bus
S
2
1
14
170
1
1
2
14
1
1
2
2
3
max
=
=
≈
=
k
k
R
S
47
8
43
1
R
S2
(
)
2
2
14
2
1
max
S
Out
R
V
V
W
=
(
)
(
)
W
V
V
W
V
V
R
Out
S
2
1
14
30
2
1
14
2
2
2
max
=
=
≈
=
k
R
S
1
512
1
7.
V
BS
supply
The bootstrap diode (D
BOOT
) and supply capacitor (C
BOOT
) comprise the supply voltage for the high-
side driver circuitry. To guarantee that the high-side supply is charged up before operation commences,
the first pulse from the output drivers comes from the LO pin. During undervoltage lock-out mode, the
high- and low-side outputs are both held low.
During an open-circuit condition, without the watchdog timer, the HO output would remain high at all
times and the charge stored in C
BOOT
would slowly leak until reaching zero, thus eliminating the
floating power supply for the high-side driver. To maintain sufficient charge on C
BOOT
, a watchdog
timer has been implemented. In the condition where V
IFB
remains below V
IFBTH
, the HO output will be
forced low roughly after 20 μs and the LO output forced high. This toggling of the outputs will last for
1 μs to maintain and replenish sufficient charge on C
BOOT
.
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| IRS4426SPBF | DUAL LOW SIDE DRIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IRS25401 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:LED BUCK REGULATOR CONTROL IC |
| IRS25401PBF | 功能描述:LED照明驅(qū)動器 Hysteretic Buck LED Drvr RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| IRS25401PBF | 制造商:International Rectifier 功能描述:IC LED DRVR DIP8 |
| IRS25401SPBF | 功能描述:LED照明驅(qū)動器 200V HALF BRDG DRVR LED BUCK REGULATOR RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| IRS25401STRPBF | 功能描述:LED照明驅(qū)動器 Hysteretic Buck LED Drvr RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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