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參數(shù)資料
| 型號(hào)： | LP3944ISQX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動(dòng)器 |
| 英文描述： | RGB/White/Blue 8-LED Fun Light Driver |
| 中文描述： | LED DISPLAY DRIVER, QCC24 |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大小： | 249K |
| 代理商： | LP3944ISQX |
Electrical Characteristics
(Continued)
Unless otherwise noted, V
= 5.5V. Typical values and limits appearing in normal type apply for T
= 25C. Limits appearing
in
boldface
type apply over the entire junction temperature range for operation, T
J
= 40C to +125C. (Note 5)
Symbol
Parameter
Conditions
Typical
Limit
Units
Min
Max
I
2
C INTERFACE (SCL AND SDA PINS)
t
CLK-LP
CLK Low Period
t
CLK-HP
CLK High Period
t
SU
Set-Up Time Repeated
START Condition
t
DATA-HOLD
Data Hold Time
t
DATA-SU
Data Set-Up Time
t
SU
Set-Up Time for STOP
Condition
t
TRANS
Maximum Pulse Width of
Spikes that Must Be
Suppressed by the Input
Filter of Both DATA & CLK
Signals
(Note 7)
(Note 7)
(Note 7)
1.3
0.6
μs
μs
0.6
μs
(Note 7)
(Note 7)
(Note 7)
300
100
ns
ns
0.6
μs
(Note 7)
50
ns
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical
Characteristics tables.
Note 2:
All voltages are with respect to the potential at the GND pin.
Note 3:
The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using the formula
P = (T
J
—T
A
)/
θ
JA
,
(1)
where T
is the junction temperature, T
is the ambient temperature, and
θ
is the junction-to-ambient thermal resistance. The 1.76W rating appearing under
Absolute Maximum Ratings results from substituting the Absolute Maximum junction temperature, 150C, for T
, 85C for T
, and 37C/W for
θ
. More power can
be dissipated safely at ambient temperature below 85C. Less power can be dissipated safely at ambient temperatures above 85C. The Absolute Maximum power
dissipation can be increased by 27 mW for each degree below 85C, and it must be de-rated by 27 mW for each degree above 85C. For Operating Ratings
maximum power dissipation, T
J
= 125C and T
A
= 85C
Note 4:
The human-body model is 100 pF discharged through 1.5 k
. The machine model is 0
in series with 220 pF.
Note 5:
Limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production with T
J
= 25C. All hot and cold limits are
guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control.
Note 6:
Each LED pin should not exceed 25 mA and the package should not exceed a total of 200 mA.
Note 7:
Guaranteed by design.
Typical Performance Characteristics
Frequency vs. Temp
(T
A
= 40C to +85C),
V
DD
= 2.3V to 3.0V
20085317
L
www.national.com
5
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| LP3944ISQX/NOPB | 功能描述:LED照明驅(qū)動(dòng)器 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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