Wide Vin 50V Non-synchronous Boost/Flyback/SEPIC Controller, SCT81623Q Replace LM51551-Q1.
SCT81623Q
SCT81623Q.pdf
SCT81623Q.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-50V
• Low Shutdown Current 3.9uA
• Low Quiescent Operating Current: 540uA
• +/- 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
• 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
- Hiccup Over Load Protection
- Thermal Shutdown Protection:165°C
• TQFN-12L(2mm*3mm)
PIN CONFIGUTION
CROSS
FEATURES
• AEC-Q100 qualified for automotive applications
– Temperature grade 1: –40°C to +125°C TA
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• Wide input operating range for car and portable
battery applications
– 3.5-V to 45-V Operating range
– 2.97-V to 16-V When BIAS = VCC
– Minimum boost supply voltage 1.5 V when
BIAS ≥ 3.5 V
– Input transient protection up to 50 V
• Minimized battery drain
– Low shutdown current (IQ ≤ 2.6 µA)
– Low operating current (IQ ≤ 480 µA)
• Small solution size and low cost
– Maximum switching frequency of 2.2 MHz
– 12-Pin WSON package (3 mm × 2 mm) with
wettable flanks and non-wettable flank option
– Integrated error amplifier allows primary-side
regulation without optocoupler (flyback)
– Minimized undershoot during cranking (start
stop application)
• Higher efficiency with low-power dissipation
– 100-mV ±7% Low current limit threshold
– Strong 1.5-A peak standard MOSFET driver
– Supports external VCC supply
• Avoid AM band interference and crosstalk
– Optional clock synchronization
– Dynamically programmable switching frequency
from 100 kHz to 2.2 MHz
• Integrated protection features
– Constant peak current limiting over input
voltage
– Optional hiccup mode short-circuit protection
(see the Device Comparison Table)
– Programmable line UVLO
– OVP protection
– Thermal shutdown
• Accurate ±1% accuracy feedback reference
• Programmable extra slope compensation
• Adjustable soft start
• PGOOD indicator
• Create a custom design using the LM5155x with
the WEBENCH® power designer
PIN CONFIGUTION
