參數(shù)資料
型號(hào)： FAN8048
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類(lèi)： 運(yùn)動(dòng)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(yè)數(shù)： 10/34頁(yè)
文件大小： 903K
代理商： FAN8048
FAN8048
10
Application Information
1. System Control and Protection Functions
1-1. System Enable/Disable Function
As shown in Figure 1, system enable ON (pin4) should be set low (typically under VIN - 0.65V) only once until OFF (pin3)
receives the disable signal (typically under VSYS1 - 0.85V), then all circuits remain in enable status.
Also, to prevent malfunction, this function activates when the circuit short condition exists such as over current or circuit
shorts, the whole circuit becomes the disable.
When the circuit is enabled, to obtain the necessary power (VG) to operate the internal circuits and upper side output power
switches of the 4 channels H-bridge driver, the VG converter circuit is activated. Also, to stably operate all circuits, the VG
converter keeps other circuits from activating until the output voltage of the VG converter reaches the specific voltage (3.9V).
When the output voltage of the VG converter reaches 3.9V, the first DC-DC converter (DC-DC Converter1) activate. And
when output voltage of DC-DC converter1(VSYS1) reaches 1.35V, the second converter (DC-DC Converter2) activates in
sequence. The circuit activation sequence as stated above and a flow chart are shown in Figure 3 and Figure 4.
1-2. Channel Mute Function
When MUTE (pin29) is high (typically above 2.2V), the mute circuit activates, so the all motor driver (4 channels H-bridge
driver) outputs are in mute state; on the other hand, when it is low (under 0.5V), mute state is off.
1-3. Thermal Shut Down(TSD) Function
This thermal shutdown (TSD) function is designed to protect the chip from being damaged as the chip's internal temperature
rises. If the TSD circuit activates, all motor driver (4 channel H-bridge drivers) outputs are in mute state. When the chip's
internal temperature reaches 150°C (typical), then the TSD circuit is activated, and when the chip temperature falls to 130°C or
below, the TSD circuit is deactivated and the output drivers operate normally.
Figure 1. Block Diagram of System Control Circuit
VG
ON
1
DC-DC Converter
Wake-up Singnal
Bias &
Refernece
VG Converter
DC-DC
Converter
System_ON
Vref1
Bias
R1
R2
4
Start_up
Circuit
System_ON
MUTE
150
℃
125
℃
TSD
Mute Circuit
29
Channel Mute
SPRT
OFF
EA1O
C
SPRT
1.35V
10
3
5
System_OFF
0.5V
VSYS1
Short Circuit Detector
6uA
12uA
22
VSYS1
VSYS1<1.65V
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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(chēng):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(kāi)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(kāi)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(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DC Motor Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DC Motor Driver Bi Directional RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DC Motor Driver Bi Directional RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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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