參數(shù)資料
型號(hào)： TB62732FUG
廠商： Toshiba Corporation
元件分類： LED驅(qū)動(dòng)器
英文描述： Step-up DC/DC Converter for White LED Driver
中文描述： 升壓直流/直流轉(zhuǎn)換器白光LED驅(qū)動(dòng)器
文件頁數(shù)： 5/18頁
文件大?。?/td> 294K
代理商： TB62732FUG
TB62732FUG
2006-06-14
5
Basic Operation
The basic TB62732FUG circuit uses a step-up DC/DC converter, and features peak control of the current
pulse.
The inductance is turned on and off with the fixed frequency f
OSC
(
1.1 MHz (typ.)), and the inductor is charged
with energy.
When the inductance is turned on, the inductor current IL increases from IL = 0; and when IL = ILpeak is
reached, the inductance is turned off.
At this point, the Schottky diode is turned on and IL
=
Ic2 flows so that the coil may retain IL
=
ILpeak.
After that, Ic2 is decreased, and IL
=
0 is reached.
This operation is repeated; and as soon as Ic2 has fully charged C2, I
o
flows to the LED.
The details of the basic pulse used for the current control are shown in Figure 2.
S
Q
R
SHDN
A
R
V
I
GND
IL, ILpeak
I
o=
I
f
LED
Ic2
K
V
CC
C
2
C
3
Z
D
10
μ
H
1.1 MHz
C
1
I
Amp
Figure 1 Application Circuit
Figure 2 Switching Waveform of Inductance
0 (mA)
min
I
IL
=
ILpeak
Maximum duty 85%
Waveform of recommend
inductance 1
Recommended inductor
waveform 1
T
=
1/f
OSC
, f
OSC
=
1.1 MHz (typ.)
Recommended inductor
waveform (max.)
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參數(shù)描述
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TB62736FUG 制造商:MARKTECH 制造商全稱:Marktech Corporate 功能描述:Step-up Type DC-DC Converter for White LEDs
TB62736FUG(O,EL) 功能描述:LED照明驅(qū)動(dòng)器 White LED Driver 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
TB62737FPG(O,EL) 功能描述:LED照明驅(qū)動(dòng)器 White LED Driver 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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