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參數(shù)資料
| 型號： | FAN8048 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | 2 DC-DC Converter & 4-CH PWM Motor IC |
| 中文描述： | DISK DRIVE MOTOR CONTROLLER, 0.5 A, PDSO48 |
| 封裝： | 7 X 7 MM, LQFP-48 |
| 文件頁數(shù)： | 19/34頁 |
| 文件大?。?/td> | 903K |
| 代理商： | FAN8048 |
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FAN8048
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3-9. Buck-Boost (Step-down/up) Converter Mode (VIN = VSYS)
As shown in Figure.13-a, the synchronous buck-boost converters take the mixed form of step-up and step-down converters.
That is, in case switching devices in the series connection of the two converters activate in the same duty ratio, the input/output
relationship during normal conditions can be expressed as follows: Namely, the output voltage VSYS can be higher or lower
than DC input voltage VIN according to duty ratio D.
As shown in Figure 13-b, the current flowing through the inductor is constant in continuous conduction mode. And the input
and output voltages relationship formula can be defined as follows, because , the integral of the inductor voltage over one time
period to zero.
Assuming a lossless circuit, input and output power are the same (Pin=Po) and the above formula can be redefined as follows:
As you can see in Figure 14, when internal control voltage VX and VY remain in the triangular waveform voltage V
PCT
range,
the converter acts as a step-up or step-down converter mode according to DC input voltage VIN and electrical load VSYS and
ISYS status. As displayed in Figure13-a, in this operation mode all four switching devices of the output terminal activate upon
operational mode step-up or step-down. Figure13-b shows the operational waveform of each section in this activation mode.
]
[
1
V
V
D
D
V
IN
SYS
=
D
D
V
V
T
D
V
DT
V
IN
SYS
S
SYS
S
SYS
=
=
+
1
0
)
1
)(
(
D
D
I
I
IN
SYS
=
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FAN8082D | Bi-directional DC Motor Driver |
| FAN8082DTF | Bi-directional DC Motor Driver |
| FAN8082 | Bi-directional DC Motor Driver |
| FAN8100MTC | Low Voltage/Low Saturation 2-CH DC Motor Driver |
| FAN8100MTCX | Low Voltage/Low Saturation 2-CH DC Motor Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN8060 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:1.2MHz, 1A Synchronous Step-Down DC/DC Regulator |
| FAN8060EMPX | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.2MHz, 1A Sync Step Down DC/DC RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| FAN8082 | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 DC Motor Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| FAN8082D | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 DC Motor Driver Bi Directional RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| FAN8082DTF | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 DC Motor Driver Bi Directional RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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