SC2450 Datasheet | SEMTECH

Description 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 harmonics on the backplane. 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. The use of high speed switching circuits allows very narrow PWM outputs down to 15:1 voltage ratios. Single pin pensation 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 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 Applications K Power supplies for advanced teles/datas K SO IP, Ethernet and PABX power supplies Typical Application Circuit Revision 2, August 2001 .semtech. POWER MANAGEMENT Absolute Maximum Ratings Parameter Supply Voltage Voltage on BST Pins Oscillator Frequency VC C Thermal Resistance Junction to Case Thermal Resistance Junction to Ambient Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 seconds θJC θJ A TA TSTG TLEAD (1) Symbol VIN V BST Maximum 34 42 2 8 25 80 -40 to +85 -55 to +150 300 Units V V MHz V °C/W °C/W °C °C °C Note: (1) Maximum frequency and maximum supply voltage could cause excessive power dissipation in the part. Electrical Characteristics Unless specified VIN = 24V, TA = 25°C PARAMETER Supply Voltage, VIN Supply Current Under Voltage Lockout UVLO Hysteresis Voltage Regulator Pre Regulator Voltage Bgout Voltage Bgout Impedance...