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PWM Controller
PWM Controller
SCT81570QLAR
Restocking
Wide Vin 60V Non-synchronous Boost/Flyback/SEPIC Converter
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- Product Introduction
- Technical data
- Parameter comparison
Product Features
FEATURES:
•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) Package
DESCRIPTION:
•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) Package
DESCRIPTION:
The SCT81570 device is a wide input, non-synchronous boost converter with an integrated 60V, 6A power switch. The device can be used in Boost,
SEPIC and Flyback converters.The switching frequency of the SCT81570 device can be adjusted to any value between 100kHz and 2.2MHz by using
a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response in
addition to cycle-by-cycle current limiting. Current limit is constant over input voltage. The SCT81570 is an Electromagnetic Interference (EMI) friendly controller with implementing optimized design for EMI reduction. The SCT81570 features selectable Frequency Spread Spectrum (FSS) with ±6% jittering span of the switching frequency and modulation rate 1/512 of switching frequency to reduce the conducted EMI. The SCT81570 device has built-in protection features such as thermal shutdown, short-circuit protection and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 2μA. The device is available in a TQFN-16L(3mm*3mm) Package.
APPLICATIONS:
SEPIC and Flyback converters.The switching frequency of the SCT81570 device can be adjusted to any value between 100kHz and 2.2MHz by using
a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response in
addition to cycle-by-cycle current limiting. Current limit is constant over input voltage. The SCT81570 is an Electromagnetic Interference (EMI) friendly controller with implementing optimized design for EMI reduction. The SCT81570 features selectable Frequency Spread Spectrum (FSS) with ±6% jittering span of the switching frequency and modulation rate 1/512 of switching frequency to reduce the conducted EMI. The SCT81570 device has built-in protection features such as thermal shutdown, short-circuit protection and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 2μA. The device is available in a TQFN-16L(3mm*3mm) Package.
APPLICATIONS:
•Multi-output Flyback
•LED Bias Supply
•Portable Speaker Supply
•Battery Powered Boost/Flyback/SEPIC application
Package information
Technical data
| Title | Time | Download |
|---|---|---|
| SCT81570 Datasheet Rev 1.1 | 2026-02-04 |
 Download
|
Parameter comparison
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