參數(shù)資料
型號(hào)： AN8018
廠商： Panasonic Corporation
元件分類： DC/DC變換器
英文描述： 1.8-volt 2-channel step-up, step-down, or inverting DC-DC converter control IC
中文描述： 1.8伏雙通道升壓，降壓，或倒轉(zhuǎn)DC - DC轉(zhuǎn)換器控制IC
文件頁(yè)數(shù)： 19/26頁(yè)
文件大?。?/td> 268K
代理商： AN8018
19
Voltage Regulators
AN8018SA
I
Application Notes (continued)
[8] Setting of Off-terminal connection resistor
The start circuit starts its operation when Q1 is turned
on. In case of the resistor R
OFF
is connected externally as
shown in figure 9, the input voltage V
CTL
at which the start
circuit operates is obtained by the equation:
V
CTL
>
V
BEQ1
×
(R
OFF
+
R
1
+
R
2
) / R
2
Therefore, R
OFF
can be set by:
R
OFF
<
R
2
· V
CTL
/ V
BEQ1
R
1
R
2
Set the value of R
OFF
according to above equations.
(Typical value)
R
OFF
<
25 k
including temperature characteristics
and sample to sample variations at V
CTL
=
3 V.
[9] Sequential operation
In the case of sequential operation is necessary for each channel at IC operation, it is possible to turn on/off the
output of DC-DC converter individually by turning on/off Q1 and Q2 as shown in figure 10.
In the channel 1 side, if Q1 turns on and the DT1 terminal (pin 6) becomes 0.2 V or less, the output transistor turns
off due to lower voltage than the OSC terminal (pin 1). Simultaneously, unlatch circuit 1 block operates, and the timer
latch short-circuit protection does not operate because the FB1 terminal (pin 5) becomes fixed to low even if output
of channel 1 downs.
In the channel 2 side, if Q1 turns on and the DT2 terminal (pin 12) becomes 0.9 V or more, the output transistor
turns off due to higher voltage than the OSC terminal (pin 1). Simultaneously, unlatch circuit 2 block operates, and
the timer latch short-circuit protection does not operate because the FB2 terminal (pin 13) becomes fixed to high even
if output of channel 2 downs.
R
OFF
CTL
Off 15
R1
30 k
R2
60 k
Q1
Figure 9. Off terminal peripheral circuit
Start circuit
V
1
V
2
0.9 V
0.9 V
Unlatch2
Q1
Q2
1.19 V
5
F
6
D
7
O
8
G
V
C
1
1
1
1
1
9
O
F
R
D
V
R
0.2 V
Unlatch1
Control block
Figure 10
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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AN8018SA 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:1.8-volt 2-channel step-up, step-down, or inverting DC-DC converter control IC
AN8018SA-E1 功能描述:IC REG CTRLR BST INV PWM 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)
AN8018SA-E1V 功能描述:IC REG CTRLR BST INV PWM 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無(wú) 升壓:無(wú) 回掃:是 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁(yè)面:1316 (CN2011-ZH PDF)
AN8019 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
AN-8019 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Reliable USB Modem Design Using the Combination of an Integrated Load Switch and a Buck Converter
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