Wide Vin 60V Non-synchronous Boost/Flyback/SEPIC Converter, SCT81570 Replace LM5157.
SCT81570
SCT81570.pdf
SCT81570.pdfFEATURES
? Qualified for Automotive Applications
? AEC-Q100 Qualified with the Following Results:
- Device Temperature Grade 1: -40°C to 125°C
Ambient Operating Temperature Range
- Device HBM ESD Classification Level H2
- Device CDM ESD Classification Level C3B
? Wide Input Voltage Range: 3.1V-55V
? Low Shutdown Current: 2μA
? Low Quiescent Operating Current: 490μA
? +/- 1.5% Feedback Reference Voltage
? High Efficiency LS MOSFET with 77mΩ RDS(ON)
? Adjustable Switching Frequency: 100KHz to
2.2MHz
? Selectable Frequency Dither for EMI Mitigation
? External Frequency Synchronic
? External Compensation
? Pulse Skipping Mode
? Adjustable Soft-start Time
? Power Good Indicator
? Integrated Protection Feature
- Constant Peak-Current Protection Threshold
Over Input Voltage
- Output Overvoltage Protection
- Adjustable Under-voltage Lockout
- Selectable Hiccup Over Load Protection
- Thermal Shutdown Protection:175°C
? TQFN-16L(3mm*3mm)
PIN CONFIGUTION
優(yōu)勢替代
FEATURES
? Suited for wide operating range for battery
applications
– 2.9-V to 45-V input operating range
– 48-V maximum output (50-V abs max)
– Minimum boost supply voltage of 1.5 V when
BIAS ≥ 2.9 V
– Input transient protection up to 50 V
– Minimized battery drain
? Low shutdown current (IQ ≤ 2.6 ?A)
? Low operating current (IQ ≤ 670 ?A)
? Small solution size and low cost
– Maximum switching frequency up to 2.2 MHz
– 16-pin QFN package (3 mm × 3 mm)
– Integrated error amplifier allows primary-side
regulation without optocoupler (flyback)
– Accurate current limit (see the Device
Comparison Table)
? EMI mitigation
– Selectable dual random spread spectrum
– Lead-less package
? Higher efficiency with low-power dissipation
– 45-mΩ RDSON switch
– Fast switching, small switching loss
? Avoid AM band interference and crosstalk
– Optional clock synchronization
– Dynamically programmable wide switching
frequency from 100 kHz to 2.2 MHz
? Integrated protection features
– Constant current limiting over input voltage
– Selectable hiccup mode overload protection
– Programmable line UVLO
– OVP protection
– Thermal shutdown
? Accurate ±1% accuracy feedback reference
? Adjustable soft start
? PGOOD indicator
? Create a custom design using the LM5157x with
the WEBENCH? Power Designer
? Audio amplifier power supply
? Piezo driver/motor driver bias supply
PIN CONFIGUTION
