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參數(shù)資料
| 型號： | LT1942EUF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Quad DCDC Converter for Triple Outputs TFT Supply Plus LED Driver |
| 中文描述： | 4 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | 4 X 4 MM, 0.75 MM HEIGHT, PLASTIC, MO-220WGGD, QFN-24 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 248K |
| 代理商： | LT1942EUF |
LT1942
14
1942fa
TYPICAL APPLICATIO S
Figure 4. TFT Bias (5V, 10V, –10V) and White LED Backlight Supply from Single Li-Ion Cell
CTRL4
SGND/
AGND
D3
SW3
LT1942
SW1
FB1
PGND14
PGOOD
SW4
D4
LED1
LED2
FB4
CT
FB3
PGND23
V
OUT3
NFB2
D2
SW2
C5 0.1
μ
F 16V
C6
C2
0.22
μ
F
16V
V
–10V
2mA
L2 47
μ
H
V
IN
L5 47
μ
H
SHDN
V
CC
SS1
SS4
L3 22
μ
H
L1
22
μ
H
L4 33
μ
H
R1
301k
D1
R8
1M
R2
100k
V
IN
4.7pF
M1
PMOS
C7
0.1
μ
F
C8
0.1
μ
F
C9
0.1
μ
F
1942 F04a
C3
0.22
μ
F
16V
C5
22
μ
F
C1 TO C9: X5R OR X7R
D1: CMDSH-3 CENTRAL SEMICONDUCTOR
L1: 22
μ
H MURATA LQH32CN220K53
L2, L5: 47
μ
H TAIYO YUDEN LB2012B470
L3: 22
μ
H TAIYO YUDEN LB2012B220
L4: 33
μ
H SUMIDA CDPH4D19-330MC
M1: Si2301BDS SILICONIX
SHUTDOWN
LED CONTROL
AV
DD
5V
40mA
C1
4.7
μ
F
6.3V
C4
4.7
μ
F
25V X5R
R5
698k
R6
100k
R4
10k
V
IN
3V TO 4.2V
V
10V
2mA
R3
665k
R7
4.99
20mA
20mA
LED CONTROL VOLTAGE
>2.5V
0.25V
<0.1V
LED CURRENT
20mA
2.5mA
DISABLED
TOTAL LED CURRENT (mA)
5
E
80
85
90
20
30
1942 F04b
75
70
10
15
25
35
40
65
60
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 3V
AV
DD
LOAD = 40mA
V
OFF
LOAD = 2mA
V
ON
LOAD = 2mA
V
5V/DIV
V
10V/DIV
V
ON
10V/DIV
2ms/DIV
1942 F04c
V
1V/DIV
V
20mV/DIV
AC-COUPLED
I
LI
50mA/DIV
100
μ
s/DIV
1942 F04d
Efficiency
AV
DD
Transient Response, I
LOAD
Stepped from
30mA
→
40mA
→
30mA
TFT Power Supply Sequencing
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PDF描述 |
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| LT1943 | High Current Quad Output Regulator for TFT LCD Panels |
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| LT1944 | 1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| LT1944-1 | Dual Micropower Step-Up DC/DC Converter |
| LT1944-1EMS | Dual Micropower Step-Up DC/DC Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1942EUF#PBF | 功能描述:IC REG SW QUAD TFT LCD 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LT1942EUF#TRPBF | 功能描述:IC REG SW QUAD TFT LCD 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LT1942EUFPBF | 制造商:Linear Technology 功能描述:Conv DC-DC Quad Inv/Step-Up 16V QFN24EP |
| LT1943 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad DCDC Converter for Triple Outputs TFT Supply Plus LED Driver |
| LT1943_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Current Quad Output Regulator for TFT LCD Panels |
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