поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

UC3380G-XX-AF5-R датащи(PDF) 8 Page - Unisonic Technologies

номер детали UC3380G-XX-AF5-R
подробное описание детали  PWM STEP UP DC-DC CONTROLLER
Download  9 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  UTC [Unisonic Technologies]
домашняя страница  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3380G-XX-AF5-R датащи(HTML) 8 Page - Unisonic Technologies

  UC3380G-XX-AF5-R Datasheet HTML 1Page - Unisonic Technologies UC3380G-XX-AF5-R Datasheet HTML 2Page - Unisonic Technologies UC3380G-XX-AF5-R Datasheet HTML 3Page - Unisonic Technologies UC3380G-XX-AF5-R Datasheet HTML 4Page - Unisonic Technologies UC3380G-XX-AF5-R Datasheet HTML 5Page - Unisonic Technologies UC3380G-XX-AF5-R Datasheet HTML 6Page - Unisonic Technologies UC3380G-XX-AF5-R Datasheet HTML 7Page - Unisonic Technologies UC3380G-XX-AF5-R Datasheet HTML 8Page - Unisonic Technologies UC3380G-XX-AF5-R Datasheet HTML 9Page - Unisonic Technologies  
Zoom Inzoom in Zoom Outzoom out
 8 / 9 page
background image
UC3380
CMOS IC
UNISONICTECHNOLOGIESCO.,LTD
8 of 9
www.unisonic.com.tw
QW-R502-099.C
EXTERNAL COMPONENTS
1. Diode (D1)
The diode is the largest source of loss in DC-DC converters. The most important parameters which affect the
efficiency are the forward voltage drop
D
U and the reverse recovery time. The forward voltage drop creates a loss
just by having a voltage across the device while a current flowing through it. The reverse recovery time generates a
loss when the diode is reverse biased, and the current appears to actually flow backwards through the diode due to
the minority carriers being swept from the P-N junction. A Schottky diode with the following characteristics is
recommended:
*Low forward voltage:
0.3
D
UV
<
*Fast reverse recovery time/switching speed:
50nS
*Rated current:
PK
I
>
*Reverse voltage:
OD
UU
≥+
2. Inductor (L1)
Low inductance values supply higher output current, but also increase the ripple and reduce efficiency. Choose a low
DC-resistance inductor to minimize loss. It is necessary to choose an inductor with saturation current greater than
the peak current that the inductor will encounter in the application. Saturation occurs when the inductor’s magnetic
flux density reaches the maximum level the core can support and inductance falls.
3. Capacitor (C1, C3)
The input capacitor C1 improves the efficiency by reducing the power impedance and stabilizing the input current.
Select a C1 value according to the impedance of the power supply used. Small Equivalent Series Resistance (ESR)
Tantalum or ceramic capacitor with an appropriate value should be suitable
The output capacitor is used for smoothing the output voltage and sustaining the output voltage when the switch is
on. Select an appropriate capacitor depending on the ripple voltage that increases in case of a higher output voltage
or a higher load current. The capacitor value should be 10uF minimum. Small ESR should be used to reduce output
ripple voltage. However, the best ESR may depend on L, capacitance, wiring and applications (output load).
Therefore, fully evaluate ESR under an actual condition to determine the best value.
4. External transistor (Q1 R1 C2)
An enhancement N-channel MOSFET or a bipolar NPN transistor can be used as the external switch transistor.
*Bipolar NPN transistor
The hFE value of NPN transistor and the R1 value determine the driving capacity to increase the output
current using a bipolar transistor. 1KΩ is recommended for R1. R1 is selected from the following calculation.
Calculate the necessary base current(Ib) from the bipolar transistor hFE using
PK
b
FE
I
I
h
=
0.7
0.4
1
||
bEXTH
Vout
R
II
=−


Аналогичный номер детали - UC3380G-XX-AF5-R

производительномер деталидатащиподробное описание детали
logo
Unisonic Technologies
UC3380G-XX-AF5-R UTC-UC3380G-XX-AF5-R Datasheet
278Kb / 9P
   PWM STEP UP DC-DC CONTROLLER
More results

Аналогичное описание - UC3380G-XX-AF5-R

производительномер деталидатащиподробное описание детали
logo
Unisonic Technologies
UC3380 UTC-UC3380_15 Datasheet
278Kb / 9P
   PWM STEP UP DC-DC CONTROLLER
L3380 UTC-L3380 Datasheet
166Kb / 9P
   PWM STEP UP DC-DC CONTROLLER
UC3380 UTC-UC3380_12 Datasheet
278Kb / 9P
   PWM STEP UP DC-DC CONTROLLER
logo
ON Semiconductor
NCP1450A ONSEMI-NCP1450A Datasheet
202Kb / 24P
   PWM Step-up DC-DC Controller
April, 2003 - Rev. 5
logo
Microchip Technology
TC110 MICROCHIP-TC110 Datasheet
464Kb / 16P
   PFM/PWM Step-Up DC/DC Controller
2002
TC110 MICROCHIP-TC110 Datasheet
465Kb / 16P
   PFM/PWM Step-Up DC/DC Controller
2002
logo
Unisonic Technologies
UC3550 UTC-UC3550_10 Datasheet
368Kb / 10P
   PWM CONTROLLED,PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER
UC3550 UTC-UC3550_15 Datasheet
386Kb / 11P
   PWM CONTROLLED, PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER
logo
Anachip Corp
AP1624 ANACHIP-AP1624 Datasheet
172Kb / 7P
   PWM/PFM Dual Mode Step-up DC/DC Controller
logo
Diodes Incorporated
AP1624 DIODES-AP1624 Datasheet
450Kb / 7P
   PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER
AP1624 Rev. 1
More results


Html Pages

1 2 3 4 5 6 7 8 9


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com