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ACT6390 fiches techniques PDF

Active-Semi - (ACT6390 / ACT6391) 1.7A/2.5A PWM Step-Up DC/DC Converters

Numéro de référence ACT6390
Description (ACT6390 / ACT6391) 1.7A/2.5A PWM Step-Up DC/DC Converters
Fabricant Active-Semi 
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ACT6390 fiche technique
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ACT6390/ACT6391
Rev0, 13-May-08
1.7A/2.5A PWM Step-Up DC/DC Converters In MSOP
FEATURES
Greater than 90% Efficiency
Adjustable Output Voltage Up to 12V
Internal 14V Power MOSFET
Two Peak Current Options:
ACT6390: 1.7A, 0.2
ACT6391: 2.5A, 0.15
Selectable 700kHz/1.3MHz Frequency
Integrated Over-Voltage Protection (OVP)
Programmable Soft-Start Function
Thermal Shutdown
Cycle-by-Cycle Over-Current Protection
Small MSOP-8 Package
APPLICATIONS
TFT LCD Monitors
Battery-Powered Equipment
Set-Top Boxes
DSL and Cable Modems and Routers
GENERAL DESCRIPTION
The ACT6390/ACT6391 are high-performance,
fixed-frequency, current-mode PWM step-up
DC/DC converters that incorporate internal power
MOSFETs. The ACT6390 includes an integrated
0.2power MOSFET that supports peak currents
of up to 1.7A, while the ACT6391’s integrated
0.15power MOSFET supports currents of up to
2.5A.
The ACT6390 and ACT6391 both utilize simple ex-
ternal loop compensation and a pin-selectable
fixed-frequency of either 700kHz or 1.3MHz, allow-
ing optimization between component size, cost, and
AC performance across a wide range of applica-
tions. Additional functions include an externally pro-
grammable soft-start function for easy inrush cur-
rent control, internal over-voltage protection (OVP),
cycle-by-cycle current limit protection, and thermal
shutdown.
Both the ACT6390 and the ACT6391 are available
in the small 8-pin MSOP-8 package.
SIMPLIFIED APPLICATION CIRCUIT
VIN
2.7V to 5.5V
IN
ON
OFF
1.3MHz
700kHz
ACT6390
ACT6391
EN
SW
VOUT
FREQ
R1
SS
COMP
FB
G R2
Innovative PowerTM
- 1 - www.active-semi.com
Copyright © 2008 Active-Semi, Inc.

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