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參數(shù)資料
| 型號： | W83301 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | SUBMINIATURE POWER RELAY |
| 中文描述： | ACPI的可疑控制器 |
| 文件頁數(shù)： | 9/13頁 |
| 文件大小： | 221K |
| 代理商： | W83301 |
Publication Release Date: Jul., 2002
Revision 1.0
7
W83301DR-O
7.3 Charge Pump
In order to simply the design circuit and provide a cost-effective solution for customer,
the W83301DR-O integrates with a switched-capacitor voltage doublers charge pump to
provide a higher driving voltage (Up to 10 volt) and can drive single N-channel MOSFETs in
each output.
7.4 Power OK
The W83301DR-O use a bi-direction Power OK signal to ensure the system can work
normally. When the system jump from the state S3 to the state S0, the W83301DR-O will
monitor the input signal from PWOK pin to ensure that external system power is OK and
then will switches each outputs into the S0 state; In the other hand, the W83301DR-O will
pulls down the Power OK signal to inform the system a over current and induce under-
voltage occurred.
7.5 Soft-Start
During the ‘ S5off’ to the ‘ S5on’ and the ‘ S5on’ to the ‘ S0’ state transitions, the
5Vdual/3Vdual and STR voltages need to ramp up from 0V to the setting values
respectively. The charging current flowing to output capacitors must be limited to avoid
supply drop-off.
In W83301DR-O, an internal 18 uA current source (Iss) charges an external capacitor
(Css) to generate a linear ramp-up voltage on SS pin (Vss). The Vss slews from 0V to about
9V during the above-mentioned state transitions, and the Vss slew rate is used to clamp the
ramp-up rate of 5Vdual and STR output voltages. This output clamping allows power-ups
free of supply drop-off events.
Since the outputs are ramped up in a constant slew-rate, the current dedicated to
charge any output capacitor can be calculated with the following formula:
I
COUT
= Iss x (Cout / Css)
Some technique are included in W83301DR-O to further reduce the total charging
current: the bus-terminator is input clamped, and its output voltage slew-rate, so as its
charging current, will be limited to half of that of STR1.
Note that, too slow ramp-up rate is not recommended. If so, the state transition
mentioned above will be prolonged to much. Before Vss ramps up to its upper limit (about
9V), the state transition will not be completed and will not go into next state.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W83301R | SUBMINIATURE PC BOARD RELAY |
| W83601R | Winbond SMBus GPI/O |
| W83601R602R | WINBOND GPI/O IC |
| W83602R | Winbond SMBus GPI/O |
| W83626D | LPC-to-ISA Bridge |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W83301DR-O | 制造商:WINBOND 制造商全稱:Winbond 功能描述:ACPI-STR Controller |
| W83301R | 制造商:WINBOND 制造商全稱:Winbond 功能描述:ACPI-STR Controller |
| W83303AD | 制造商:WINBOND 制造商全稱:Winbond 功能描述:Advanced ACPI Controller |
| W83303AG | 功能描述:IC ACPI CONTROLLER 48-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| W83303G | 功能描述:IC ACPI CONTROLLER 48-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
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