參數(shù)資料
型號: LP3933SL
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 顯示驅(qū)動(dòng)器
英文描述: Lighting Management System for Six White LEDs and Two RGB or FLASH LEDs
中文描述: LED DISPLAY DRIVER, QCC32
封裝: 4.50 X 5.50 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, CSP-32
文件頁數(shù): 9/18頁
文件大?。?/td> 406K
代理商: LP3933SL
Magnetic Boost DC/DC Converter
(Continued)
Boost Converter Topology
20080528
Magnetic Boost DC/DC Converter Electrical Characteristics
Symbol
I
LOAD
Parameter
Conditions
Min
Typ
Max
Units
Load Current
3.0V
V
IN
4.5V
V
OUT
= 5V
1 mA
I
LOAD
300 mA
3.0V
V
IN
V
OUT
0.5V
V
OUT
= 5V
1 mA
I
LOAD
300 mA
3.0V
<
V
IN
<
5V +
V
(SCHOTTKY)
1 mA
I
LOAD
300 mA
V
IN
>
5V + V
(SCHOTTKY)
V
DD1, 2
= 2.775V, I
SW
=
0.5A
RT = 82 k
0
300
mA
V
FB
Output Voltage
Accuracy (FB Pin)
5
+5
%
Voltage at FB Pin
(Boost Converter
Output Voltage)
5
V
V
IN
–V
(SCHOTTKY)
V
RDS
ON
Switch ON Resistance
0.4
0.7
f
PWF
PWM Mode Switching
Frequency
Frequency Accuracy
1
MHz
2.65
V
DD1, 2
2.9
RT = 82 k
6
9
±
3
+6
+9
%
t
STARTUP
I
CL_OUT
Startup Time
SW Pin Current Limit
25
800
ms
670
530
915
995
mA
Boost Standby Mode
User can set the Boost Converter to STANDBY mode by writing the register bit EN_BOOST low. When EN_BOOST is written
high, the converter starts for 10 ms in PFM mode and then goes to PWM mode.
L
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