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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)： | 14/34頁 |
| 文件大?。?/td> | 903K |
| 代理商： | FAN8048 |
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FAN8048
14
3. DC-DC Converter (VG Converter and Synchronous DC-DC Converter)
3-1. VG Converter (Step up Converter)
The VG converter is used to generate necessary power (VG) for upper side output power switches operation of 4 channels H-
bridge driver and other internal circuit operations as shown in Figure 7. The output voltage (VG) of VG converter is internally
set to 7.0V, and it activates DC-DC Converter 1 when VG converter output voltage reaches 3.9 V. Also VG converter has an
oscillator function, which is required for switching operations and to minimize external components.
Figure 7. Set up Converter (VG Converter)
3-2. Synchronous Step-up/Down Converter
The FAN8048 provides high efficiency and low noise power for applications such as portable instrumentation. Figure 8 shows
the functional block diagram of synchronous step up/down converter.
Figure 8. Block diagram of Step-up/down converter
In Figure 8, the output voltage (VSYS) of DC-DC converter is calculated as follows:
48
Clock
Sawtooth
Vref1
DC-DC Converter
Wake-up Singnal
R1
R2
FAN8048
D1
L
G
V
BAT
C
G
SYSTEM_ON
1
4
ON
VG
LG
0.9V
R1
R2
11
R
C
C
C
Error Amp
10
V
Y
VA
VB
VC
VD
VA
VB
VD
VC
V
Z2
V
Z1
V
X
19
21
Power Stage
FAN8048 DC-DC Converter
V
BAT
USW
DSW
CLK
VSYS
8
PCT
9
SOFT
1.79V
Start Comp
VSYS
18
PCT
OSC2
L
7
Stop Comp
1.27V
0.5V
Start & Short Circuit Protection
Sync. Clock
SPRT
22
V
COM
V
COM
5
1.48V
PCT
OSC2
0.56V
C
P
]
[
,
]
[
)
2
V
1
1
V
where
V
R
R
V
V
REF
REF
SYS
=
+
×
=
相關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 |
相關代理商/技術參數(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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| FAN8082 | 功能描述:馬達/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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| FAN8082D | 功能描述:馬達/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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| FAN8082DTF | 功能描述:馬達/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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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