Wide Vin 65V Non-synchronous Boost/Flyback/SEPIC Controller, SCT81621 Replace LM3481.
SCT81621
SCT81621.pdf
SCT81621.pdfFEATURES
• Wide Input Voltage Range: 2.92V-60V
• Low Shutdown Current 3.9uA
• Low Quiescent Operating Current: 470uA
• +/- 1.5% Feedback Reference Voltage
• Adjustable Switching Frequency: 100KHz to 2.2MHz
• Integrated Frequency Dither for EMI Mitigation
• External Frequency Synchronic
• External Compensation
• Pulse Skipping Mode
• Supports additional Slope Compensation
• 14ms Internal Soft-start Time
• Integrated Protection Feature
–Constant Peak-Current Protection Threshold
Over Input Voltage
–Output Overvoltage Protection
–Adjustable Under-voltage Lockout
–Hiccup Over Load Protection
–Thermal Shutdown Protection:165°C
• MSOP-10L(3mm*3mm)
PIN CONFIGUTION
CROSS
FEATURES
• LM3481QMM are Automotive-Grade Products
That are AEC-Q100 Grade 1 Qualified (–40°C to
+125°C Operating Junction Temperature)
• 10-Lead VSSOP Package
• Internal Push-Pull Driver With 1-A Peak Current
Capability
• Current Limit and Thermal Shutdown
• Frequency Compensation Optimized With a
Capacitor and a Resistor
• Internal Softstart
• Current Mode Operation
• Adjustable Undervoltage Lockout With Hysteresis
• Pulse Skipping at Light Loads
• Key Specifications
– Wide Supply Voltage Range of 2.97 V to 48 V
– 100-kHz to 1-MHz Adjustable and
Synchronizable Clock Frequency
– ±1.5% (Over Temperature) Internal Reference
– 10-µA Shutdown Current (Over Temperature)
• Create a Custom Design Using the LM3481 with
the WEBENCH Power Designer
PIN CONFIGUTION
