參數(shù)資料
型號(hào)： L6911ETR
廠商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： 1.3 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20
封裝： SO-20
文件頁(yè)數(shù)： 5/34頁(yè)
文件大?。?/td> 558K
代理商： L6911ETR
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
L6911E
Device description
13/34
Figure 4.
Soft start
5.4
Driver section
The driver capability on the high and low side drivers allows to use different types of power
MOS (also multiple MOS to reduce the Rds(ON)), maintaining fast switching transition.
The low-side mos driver is supplied directly by Vcc while the high-side driver is supplied by
the BOOT pin.
Adaptative dead time control is implemented to prevent cross-conduction and allow to use
many kinds of mosfets. The upper mos turn-on is avoided if the lower gate is over about
200mV while the lower mos turn-on is avoided if the PHASE pin is over about 500mV. The
upper mos is in any case turned-on after 200nS from the low side turn-off.
The peak current is shown for both the upper (Figure 5 on page 14) and the lowr (Figure 6
on page 14) driver at 5V and 12V. a 4nF capacitive load has been used in these
measurements.
For the lower driver, the source peak current is 1.1A @ VCC = 12V and 500mA @ VCC = 5V,
and the sink peak current is 1.3A @ VCC = 12V and 500mA @ VCC = 5V.
Similary, for the upper driver, the source peak current is 1.3A @ Vboot-Vphase = 12V and
600mA @ Vboot-Vphase = 5V, and the sink peak current is 1.3A @ Vboot-Vphase = 12V
and 550mA @ Vboot-Vphase = 5V.
Vcc Turn-on threshold
Vin Turn-on threshold
0.5V
1V
Vcc
Vin
Vss
LGATE
Vout
to GND
Timing diagram
CH3 = PGOOD; CH4 = VSS
Aquisition: CH1 = PHASE; CH2 = VOUT;
CH3 = PGOOD; CH4 = VSS
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L6916D 功能描述:運(yùn)算放大器 - 運(yùn)放 POWER SUPPLY RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
L6916DTR 功能描述:運(yùn)算放大器 - 運(yùn)放 POWER SUPPLY RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
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