SC2449 Datasheet PDF | Semtech Corporation

Semtech Corporation SC2449

The SC2449 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 8.5-28V nominal backplane power sources. The power dissipation is controlled using a novel low voltage supply technique, allowing high speed and integration, with the high drive currents to ensure low MOS.ET switching loss.

Part No.	SC2449
Datasheet	SC2449 Download
Manufacturer	Semtech Corporation
Description	BI PHASE DUAL CONTROLLER
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DESCRIPTION

Multiple supplies can be synchronized together to prevent low frequency harmonics on the backplane. The use of high speed switching circuits allows very narrow PWM outputs down to 15:1 voltage ratios. Single pin compensation for each channel simplifies development as well as reducing external pin count. Capable of driving MOS.ETs via external driver transistors for phase currents beyond 20A. .eatures K K K K K K K K K K Selectable dual output or bi-phase operation Direct drive for N-channel MOS.ETs Undervoltage lockout Synchronization to external clock Multi-converter synchronization Soft start .ast transient response Max duty cycle 45% Output over voltage protection Thermal shutdown

APPLICATIONS

K Power supplies for advanced telecoms/datacoms K SO IP, Ethernet and PABX power supplies Typical Application Circuit Revision 4, May 2002 1 SC2449 POWER MANAGEMENT

ABSOLUTE MAXIMUM RATINGS

Parameter Supply Voltage Voltage on BST Pins Oscillator Frequency VC C Thermal Resistance Ju...