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FP6188のメーカーはFeelingです、この部品の機能は「340KHz Synchronous Rectified Step-Down Converter」です。 |
部品番号 | FP6188 |
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部品説明 | 340KHz Synchronous Rectified Step-Down Converter | ||
メーカ | Feeling | ||
ロゴ | |||
このページの下部にプレビューとFP6188ダウンロード(pdfファイル)リンクがあります。 Total 13 pages
FP6188
GENERAL DESCRIPTION
2A, 23V, 340KHz Synchronous Rectified
Step-Down Converter
The FP6188 is a synchronous buck regulator with a built in two 130mΩ MOSFETs. lt achieves
2A continuous output current over a wide input supply range with excellent load and line
regulation. Current mode operation provides fast transient response and eases loop
stabilization. The device includes cycle-by-cycle current limiting and thermal shutdown
protection. The regulator only consumes 23µA supply current in shutdown mode. The FP6188
requires a minimum number of readily available external components to complete a 2A buck
regulator solution.
FEATURES
2A Output Current
0.13Ω lnternal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 95% Efficiency
23µA Shutdown Mode Current
Fixed 340KHz frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75 to 23V operating lnput Range
Output Adjustable From 0.923 to 20V
Available SOP8 & PDIP8 Package
Under Voltage Lockout
APPLICATIONS
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
DSL Modems
TYPICAL APPLICATION CIRCUIT
Rev 0.1 April 14, 2009
P1/FP6188
http://www.Datasheet4U.com
1 Page ORDER INFORMATION
Part Number
Operating Temperature
FP6188DR-G1
-40°C ~ +85°C
FP6188D-G1
-40°C ~ +85°C
FP6188P-G1
-40°C ~ +85°C
Package
SOP8
SOP8
PDIP8
FP6188
Description
Tape & Reel
Tube
Tube
IC DATE CODE DISTINGUISH
-
For example:
1 – Year 2001
2 – Year 2002
3 – Year 2003 --------- And so on
Lot Number is the last two numbers
For example:
A3311C62
Lot Number
Rev 0.1 April 14, 2009
P3/FP6188
http://www.Datasheet4U.com
3Pages Function Description
FP6188
The FP6188 is a synchronous ,current-mode buck regulator. It regulates input voltages from 4.75V to
23V down to an output voltage as low as 0.923V, and is able to supply up to 2A of load current.
The FP6188 uses current-mode control to regulate the output voltage. The output voltage is measured
at FB through a resistive voltage divider and amplified through the internal error amplifier. The output
current of the transconductance error amplifier is presented at COMP where a network compensates
the regulation control system. The voltage at COMP is compared to the switch current measured
internally to control the output voltage.
The converter uses an internal n-channel MOSFET switch to step-down the input voltage to the
regulated output voltage. Since the MOSFET requires a gate voltage greater than the input voltage, a
boost capacitor connected between SW and BS drives the gate.
The capacitor is internally charged while the switch is off. An internal switch from SW to GND is used
to insure that SW is pulled to GND when the switch is off to fully charge the BS capacitor.
Output Voltage(VOUT)
The output voltage is set using a resistive voltage divider from the output voltage to FB. The voltage
divider divides the output voltage down by the ratio:
VFB=VOUT X R2/(R1+R2)
Thus the output voltage is:
VOUT=0.92 X (R1+R2)/R2
A typical value for R2 can be as high as 100k, but a typical value is 10K.
Shutdown Mode
Drive enable Pin to ground to shut down the FP6188. Shutdown forces the internal power MOSFET off,
turns off all internal circuitry, and reduces the VIN supply current to 25μA (typ). The enable Pin rising
threshold is 1.0V(typ). Before any operation begins, the voltage at Enable Pin must exceed 1.0V (typ).
Boost High-Side Gate Drive(BST)
Since the MOSFET requires a gate voltage greater than the input voltage ,connect a flying bootstrap
capacitor between SW and BS to provide the gate-drive voltage to the high-side n-channel MOSFET
switch. The capacitor is alternately charged from the internally regulator.
On startup, an internal low-side switch connects SW to ground and charges the BST capacitor to
internally regulator voltage. Once the BST capacitor is charged, the internal low-side switch is turned
off and the BST capacitor voltage provides the necessary enhancement voltage to turn on the
high-side switch.
Rev 0.1 April 14, 2009
P9/FP6188
http://www.Datasheet4U.com
6 Page | |||
ページ | 合計 : 13 ページ | ||
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PDF ダウンロード | [ FP6188 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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