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Semtech Corporation - BI-Phase/Dual Controller

Numéro de référence SC2450
Description BI-Phase/Dual Controller
Fabricant Semtech Corporation 
Logo Semtech Corporation 





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SC2450 fiche technique
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SC2450
BI-Phase/Dual Controller
POWER MANAGEMENT
Description
.eatures
The SC2450 can be configured as a dual converter or a
bi-phase converter for high current applications. The part
is designed for point of use power supplies with 10-30V
nominal backplane power sources. Multiple supplies can
be synchronized together to prevent low frequency har-
monics on the backplane. The power dissipation is con-
trolled using a novel low voltage supply technique, allow-
ing high speed and integration, with the high drive cur-
rents to ensure low MOS.ET switching loss.
The use of high speed switching circuits allows very nar-
row PWM outputs down to 15:1 voltage ratios. Single
pin compensation for each channel simplifies develop-
ment as well as reducing external pin count.
Capable of driving MOS.ETs via external driver transis-
tors for phase currents beyond 20A.
K Selectable dual output or bi-phase operation
K Direct drive for N-channel MOS.ETs
K Undervoltage lockout
K Synchronization to external clock
K Multi-converter synchronization
K Soft start
K .ast transient response
K Max duty cycle 45%
K Output over voltage protection
Applications
K Power supplies for advanced telecoms/datacoms
K SO IP, Ethernet and PABX power supplies
Typical Application Circuit
Revision 2, August 2001
1
www.semtech.com

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