參數(shù)資料
型號(hào)： PM6685TR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32
封裝： 5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, VFQFPN-32
文件頁(yè)數(shù)： 15/52頁(yè)
文件大?。?/td> 2536K
代理商： PM6685TR
Device description
PM6685
22/52
The values in the table are measured with Vin =12V, operation mode = PWM and Iload = 2A.
The other output are unloaded.
7.2
Constant on time architecture
shows the simplified block diagram of a Constant On Time controller.
A minimum off-time constrain (380ns typ) is introduced to allow inductor valley current
sensing on the synchronous switch. A minimum on-time(150ns typ) is also introduced to
assure the start-up switching sequence.
PM6685 has a one-shot generator for each power section that turns on the high side
MOSFET when the following conditions are satisfied simultaneously: the PWM comparator
is high, the synchronous rectifier current is below the current limit threshold, and the
minimum off-time has timed out. Once the on-time has timed out, the high side switch is
turned off, while the synchronous switch is turned on according to the anti-cross conduction
circuitry management. When the negative input voltage at the PWM comparator, which is a
scaled-down replica of the output voltage ripple (see the Rfb1/Rfb2 divider in Figure 29),
reaches the valley limit (determined by internal reference Vr=0.9V), the low-side MOSFET is
turned off according to the anti-cross conduction logic once again, and a new cycle begins.
Table 6.
FSEL pin selection
FSEL
SMPS 5V
SMPS 3.3V
Frequency
KON
Frequency
KON
SGND
212kHz
4,7us
297,6kHz
3.36us
VREF
323kHz
3us
400kHz
2.5us
LDO5
432kHz
2.31us
500kHz
2.0us
相關(guān)PDF資料
PDF描述
PM6686 SWITCHING CONTROLLER, QCC32
PM75B6L1C060 AC MOTOR CONTROLLER, DMA19
PMB2304T PLL FREQUENCY SYNTHESIZER, 220 MHz, PDSO14
PMB2306R PLL FREQUENCY SYNTHESIZER, 120 MHz, PDSO16
PMB2306T PLL FREQUENCY SYNTHESIZER, 120 MHz, PDSO14
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PM6686 制造商:STMicroelectronics 功能描述:
PM6686TR 功能描述:DC/DC 開(kāi)關(guān)控制器 Step-down Controller w/adj. voltages-dual RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
PM6-6F-L 功能描述:端子 Metric Fork Terminal non-insulated, 4.0 RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp
PM6-6R-D 制造商:Panduit Corp 功能描述:
PM6-6R-L 功能描述:端子 Metric Ring Terminal non-insulated, 2.5 RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*