- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄363259 > NIS6201DR2G (ON SEMICONDUCTOR) Floating, Regulated Charge Pump PDF資料下載
參數(shù)資料
| 型號(hào)： | NIS6201DR2G |
| 廠(chǎng)商： | ON SEMICONDUCTOR |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | Floating, Regulated Charge Pump |
| 中文描述： | SWITCHED CAPACITOR REGULATOR, 1450 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | LEAD FREE, SOIC-8 |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 79K |
| 代理商： | NIS6201DR2G |
NIS6201
http://onsemi.com
6
The overcharge comparator detects when the voltage at
Vreg is 10% greater than its set level. If this situation
occurs, the overcharge circuit overrides the oscillator and
turns on the bottom FET of the driver stage. This shunts the
startup current directly to ground and bypasses the
capacitor on Vreg thus allowing for safe startups at high
input voltages.
Oscillator
The oscillator in this chip operates at a nominal
frequency of 1 MHz. The FETs have an on resistance of
20
and can drive loads in excess of 20 mA. Since the
charge diodes and capacitors are external, this device can
drive a “floating” voltage that is referenced to the input bus
such as is shown in Figure 7. The “isolation” voltage for the
regulated output is limited only by the ratings of these
external components. The oscillator can also drive a
conventional voltage doubler circuit or an inverting output
stage.
Total Power Consumption
The SO8 package used for this chip has a power rating
of 570 milliwatts. The major losses in this device come
from three circuits plus the bias current. These are the
following:
Shunt Diode
The power dissipated in this diode is due to the current
through the input series resistor when the input exceeds 15
volts. The current in the diode is the current through the
input resistor less the output and bias currents in the chip.
The output current is equal to the load current unless
multiple pump stages are used in which case it is multiplied
by the number of stages in use. An additional 2 mA of bias
current is required to operate the charge pump.
VCC
(Vin
VCC)
Rseries
2 mA
(Iout
nstages)
Pshunt diode
LDO
The power lost in the LDO pass transistor is calculated
by the voltage drop across it and the current through it. As
was the case with the shunt diode, when calculating the
load current, the number of pump stages must be accounted
for.
PLDO
(VCC
Vreg)
(2mA
(Iout
nstages))
Oscillator
The power dissipated in the oscillator section can be
approximated by multiplying the square of the load current
by the typical on resistance.
Iout2
POsc
20
Bias Current
The bias current is simply the input voltage at the Vcc pin
multiplied by 2 mA.
The total power dissipated by the chip is the sum of these
four losses. If the input voltage does not exceed 15 volts,
the shunt diode losses can be ignored. The sum of these
losses should not exceed the power rating for the device.
Note that the power rating is specified at 25
°
C and must be
derated at higher operating temperatures.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NIS6201 | Floating, Regulated Charge Pump |
| NIU7200 | Super Low Operating Current CMOS 3-Terminal Positive Voltage Regulators(極低工作電流，CMOS 3端低壓差正電壓穩(wěn)壓器) |
| NIU7201 | CMOS 3-Terminal PositiveVoltage Regulators(CMOS 3端低壓差正電壓穩(wěn)壓器) |
| NIU7202 | High Output Current CMOS 3-Terminal Positive Voltage Regulator(大電流輸出CMOS 3端低壓差正電壓穩(wěn)壓器) |
| NIU7204 | CMOS 2-Output PositiveVoltage Regulators(CMOS 2-輸出低壓差正電壓穩(wěn)壓器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NIS-7MEDIUMC10373_NIS-7-M | 制造商:LEDIL 功能描述:LENS+HOLDER+TAPE FOR 083 / 183 LEDS - Rail/Tube |
| NIS-7WIDEC10585_NIS-7-W | 制造商:LEDIL 功能描述:LENS+HOLDER+TAPE FOR 083 / 183 LEDS - Rail/Tube |
| NIS-7WWC10586_NIS-7-WW | 制造商:LEDIL 功能描述:LENS+HOLDER+TAPE FOR 083 / 183 LEDS - Rail/Tube |
| NISC-2345 | 制造商:NI 制造商全稱(chēng):National Instruments Corporation 功能描述:Portable, Shielded SCC Module Carriers |
| NISC-2350 | 制造商:NI 制造商全稱(chēng):National Instruments Corporation 功能描述:Portable, Shielded SCC Module Carriers |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。