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Soft start
L6714
46/70
15.3
Low-Side-Less startup
In order to avoid any kind of negative undershoot on the load side during start-up, L6714
performs a special sequence in enabling LS driver to switch: during the soft-start phase, the
LS driver results disabled (LS=OFF) until the HS starts to switch. This avoid the dangerous
negative spike on the output voltage that can happen if starting over a pre-biased output
(
See Figure 17
).
This particular feature of the device masks the LS turn-on only from the control loop point of
view: protections are still allowed to turn-ON the LS MOSFET in case of over voltage if
needed.
Figure 17. Low-Side-Less start-up comparison
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6726A | Single phase PWM controller |
| L6726ATR | Single phase PWM controller |
| L6727 | Single phase PWM controller |
| L6727TR | Single phase PWM controller |
| L6730CQ | Adjustable step-down controller with synchronous rectification |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6716 | 制造商:STMicroelectronics 功能描述:DC DC Cntrlr Quad-OUT Sync Step Down 48-Pin VFQFPN EP Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:2/3/4 Phase Controlr Embedded Driver |
| L6716TR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2/3/4 phase CNTRL Embedded Drivers RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6717 | 制造商:STMicroelectronics 功能描述:High-Efficiency Hybrid AM2r2 Controller 48-Pin VFQFPN Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717A | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717ATR | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller T/R 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Tape and Reel 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
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