Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

TC115331EMTTR Datasheet(PDF) 7 Page - Microchip Technology

No. de pieza TC115331EMTTR
Descripción Electrónicos  PFM/PWM Step-Up DC/DC Converter
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC115331EMTTR Datasheet(HTML) 7 Page - Microchip Technology

Back Button TC115331EMTTR Datasheet HTML 3Page - Microchip Technology TC115331EMTTR Datasheet HTML 4Page - Microchip Technology TC115331EMTTR Datasheet HTML 5Page - Microchip Technology TC115331EMTTR Datasheet HTML 6Page - Microchip Technology TC115331EMTTR Datasheet HTML 7Page - Microchip Technology TC115331EMTTR Datasheet HTML 8Page - Microchip Technology TC115331EMTTR Datasheet HTML 9Page - Microchip Technology TC115331EMTTR Datasheet HTML 10Page - Microchip Technology TC115331EMTTR Datasheet HTML 11Page - Microchip Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 14 page
background image
 2003 Microchip Technology Inc.
DS21361C-page 7
TC115
Rewriting in terms of input and output currents and volt-
ages:
EQUATION 5-5:
Solving for input current:
EQUATION 5-6:
The sawtooth current is centered on the DC current
level, swinging equally above and below the DC current
calculated in Equation 5-6. The peak inductor current is
the sum of the DC current plus half the ac current. Note
that minimum input voltage should be used when
calculating the ac inductor current (Equation 5-9).
EQUATION 5-7:
EQUATION 5-8:
EQUATION 5-9:
Combining the DC current calculated in Equation 5-6,
with half the peak ac current calculated in Equation 5-9,
the peak inductor current is given by:
EQUATION 5-10:
5.3
Internal Transistor Switch
The LX pin has a typical ON resistance of 1.4
Ω.
Therefore, peak switch current is given by (VIN/1.4).
The internal transistor switch has a maximum design
rating of 350 mA. An oscillator frequency doubling cir-
cuit is an included guard against high switching cur-
rents. Should the voltage on the LX pin rise above 1.3V
(max) while the internal N-channel switch is ON, the
oscillator frequency automatically doubles to minimize
ON time. Although reduced, switch current still flows
because the PWM remains in operation. Therefore, the
LX input is not internally current-limited and care must
be taken never to exceed the 350 mA maximum limit.
Failure to observe this will result in damage to the
regulator.
5.4
Output Capacitor
The effective series resistance of the output capacitor
directly affects the amplitude of the output voltage
ripple (The product of the peak inductor current and the
ESR determines output ripple amplitude). Therefore, a
capacitor with the lowest possible ESR should be
selected. Smaller capacitors are acceptable for light
loads (or in applications where ripple is not a concern).
The Sprague® 595D series of tantalum capacitors are
among the smallest of all low ESR surface mount
capacitors
available.
Table 5-1
lists
suggested
components and suppliers.
5.5
Board Layout Guidelines
As with all inductive switching regulators, the TC115
generates fast switching waveforms which radiate
noise. Interconnecting lead lengths should be
minimized to keep stray capacitance, trace resistance
and radiated noise as low as possible. In addition, the
GND pin, input bypass capacitor and output filter
capacitor ground leads should be connected to a single
point.
TABLE 5-1:
SUGGESTED COMPONENTS AND SUPPLIERS
VIN
MIN
() IIN
MAX
()
VOUT
MAX
() IOUT
MA X
()
Efficiency
---------------------------------------------------
=
IIN
MA X
VOUT
MAX
() IOUT
MAX
()
Efficiency
() VIN
MIN
()
----------------------------------------------------
=
VL
Ldi dt
()
=
di
VL di dt
()
=
di
VIN
MIN
VSW
()tON
L
----------------------------------------------
=
Where:
VSW = The voltage drop across the internal
N-channel MOSFET.
IPK
IIN
MA X
0.5 di
()
+
=
Type
Inductors
Capacitors
Diodes
Surface Mount
Sumida®
CD54 Series
CDR125 Series
Coiltronics™
CTX Series
Matsuo®
267 Series
Sprague®
595D Series
Nichicon™
F93 Series
Nihon
EC10 Series
Matsushita™
MA735 Series
Through-Hole
Sumida®
RCH855 Series
RCH110 Series
Renco®
RL1284-12
Sanyo™
OS-CON Series
Nichicon™
PL Series
ON Semiconductor®
1N5817 - 1N5822


Número de pieza similar - TC115331EMTTR

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Microchip Technology
TC115331EMTTR MICROCHIP-TC115331EMTTR Datasheet
232Kb / 14P
   PFM/PWM Step-Up DC/DC Converter
10/26/12 2002-2012
More results

Descripción similar - TC115331EMTTR

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Microchip Technology
TC115 MICROCHIP-TC115_13 Datasheet
232Kb / 14P
   PFM/PWM Step-Up DC/DC Converter
10/26/12 2002-2012
logo
Diodes Incorporated
AP1609 DIODES-AP1609 Datasheet
164Kb / 8P
   PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER
AP1609 Rev. 1
AP1609 DIODES-AP1609_09 Datasheet
202Kb / 9P
   PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER
AP1609 Rev. 2
logo
Anachip Corp
AP1609 ANACHIP-AP1609 Datasheet
181Kb / 8P
   PWM/PFM Dual Mode Step-up DC/DC Converter
logo
Nippon Precision Circui...
SM6702 NPC-SM6702 Datasheet
116Kb / 10P
   PFM Step-up DC/DC Converter
logo
List of Unclassifed Man...
RCR2562 ETC2-RCR2562 Datasheet
171Kb / 7P
   PFM Step-up DC/DC Converter
logo
ELM Technology Corporat...
ELM93-SERIES ELM-TECH-ELM93-SERIES Datasheet
1Mb / 8P
   PFM step-up DC/DC converter
logo
List of Unclassifed Man...
CR-F33T ETC1-CR-F33T Datasheet
122Kb / 11P
   PFM STEP-UP DC/DC CONVERTER
logo
Advanced Power Electron...
APE1910 A-POWER-APE1910 Datasheet
153Kb / 5P
   STEP-UP PFM DC/DC CONVERTER
logo
Holtek Semiconductor In...
HT77XX HOLTEK-HT77XX Datasheet
131Kb / 15P
   PFM Step-up DC/DC Converter
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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