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PDF GS2678 Data sheet ( Hoja de datos )
| Número de pieza | GS2678 | |
| Descripción | 5A 350KHz 25V Buck DC to DC Converter | |
| Fabricantes | SHENZHEN GSM ELECTAONIC | |
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Hay una vista previa y un enlace de descarga de GS2678 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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5A 350KHz 25V Buck DC to DC Converter
Datasheet
Features
Wide 3.6V to 25V Input Voltage Range
Output Adjustable from 0.8V to 23V
Maximum Duty Cycle 100%
Minimum Drop Out 0.6V
Fixed 350KHz Switching Frequency
5A Constant Output Current Capability
Internal Optimize Power MOSFET
High efficiency
Excellent line and load regulation
TTL shutdown capability
EN pin with hysteresis function
Built in thermal shutdown function
Built in current limit function
Built in output short protection function
Available in TO-263 package
Applications
LCD Monitor and LCD TV
Digital Photo Frame
Set-up Box
ADSL Modem
Telecom / Networking Equipment
General Description
The GS2678 is a 350 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 5A load with high
efficiency, low ripple and excellent line and
load regulation. Requiring a minimum
number of external components, the regulator
is simple to use and include internal
frequency compensation and a
fixed-frequency oscillator.
The PWM control circuit is able to adjust the
duty ratio linearly from 0 to 100%. An enable
function, an over current protection function
is built inside. When short protection function
happens, the operation frequency will be
reduced from 350KHz to 80KHz. An internal
compensation block is built in to minimize
external component count.
Figure1. Package Type of GS2678
wSwHwEN.DZHatEaNShGeSeMt4EUL.EnCeTt AONIC CO.,LTD http://www.086ic.cn tel:0755-81275006 mob:13424297678
1
1 page  
5A 350KHz 25V Buck DC to DC Converter
Datasheet
GS2678 Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol Parameter
Test Condition
System parameters test circuit figure4
VFB
Efficiency
Feedback
Voltage
ŋ
Vin = 5V to 25V, Vout=5V
Iload=0.5A to 5A
Vin=12V ,Vout=5V
Iout=5A
Min. Typ. Max. Unit
0.776 0.8 0.824 V
- 90 - %
Electrical Characteristics (DC Parameters)
Vin = 12V, GND=0V, Vin & GND parallel connect a 220uf/50V capacitor; Iout=500mA, Ta =
25℃; the others floating unless otherwise specified.
Parameters
Symbol
Test Condition
Min. Typ. Max. Unit
Input operation voltage
Vin
3.6 25 V
Shutdown Supply Current
Quiescent Supply Current
Oscillator Frequency
ISTBY
Iq
Fosc
VEN=0V
VEN =2V,
VFB =Vin
60 200 uA
3 5 mA
298 350 402 Khz
Switch Current Limit
IL
VFB =0
8A
EN Pin Threshold
VEN
High (Regulator ON)
Low (Regulator OFF)
1.4
0.8
V
EN Pin Input Leakage
Current
Max. Duty Cycle
IH
IL
DMAX
VEN =2V (ON)
VEN =0V (OFF)
VFB=0V
1 15 uA
1 15 uA
100 %
SHENZHEN GSM ELECTAONIC CO.,LTD http://www.086ic.cn tel:0755-81275006 mob:13424297678
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet GS2678.PDF ] | |
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