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參數(shù)資料
| 型號(hào)： | LP5522TMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動(dòng)器 |
| 英文描述： | Programmable LED Driver |
| 中文描述： | LED DISPLAY DRIVER, PBGA6 |
| 封裝： | 1.215 X 0.815 MM, 0.60 MM HEIGHT, 0.40 MM PITCH, MICRO SMD-6 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 219K |
| 代理商： | LP5522TMX |
LED OFF time counter can saturate also if Training end command is not given or no new ON time has been started. In this case
saturated OFF time is recorded and chip goes to Standby.
20217217
Recommended External Components
INPUT CAPACITOR, C
IN
Although not required for normal operation, a capacitor can
be added to V
to reduce line noise. A surface-mount multi-
layer ceramic capacitor (MLCC) is recommended. MLCCs
with a X7R or X5R temperature characteristic are preferred.
CURRENT SET RESISTOR, R
ISET
If other than 5 mA current is required, R
ISET
resistor can be
used to adjust the current. For 20 mA current 24 k
resistor
is required. Accuracy of the resistor directly effects to the ac-
curacy of the LED current. 1% or better is recommended.
LED
Forward voltage of LED must be less than minimum input
voltage minus minimum headroom voltage (V
). For exam-
ple with 2.7V input voltage and 20 mA LED current the max-
imum LED forward voltage is 2.7V - 100 mV = 2.6V.
List of Recommended External Components
Symbol
C
IN
R
ISET
LED
Symbol Explanation
VDD Bypass Capacitor
Value
100
Unit
nF
k
Type
Ceramic, X7R or X5R
Current Set Resistor for 20 mA LED Current
24
1%
User defined
11
www.national.com
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