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IC manufacturers Silanna Semiconductor

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reference designSZ1131 | Demoboard SZ-RD24-00

Silanna Semiconductor SZ1131 | Demoboard SZ-RD24-00

RD-24 45W USB PD REPORT

Overview

TopologyFlyback Converter
Input voltage90-265 V
Output 120 V / 2.25 A
Output 29 V / 3 A
Output 315 V / 3 A
Output 45 V / 3 A
IC revision1.0

Description

This reference design describes a 45 W universal input offline power supply with programmable output voltage (5 V/3 A, 9 V/3 A, 15V/3A, 20 V/2.25A). The power supply uses SZ1131 (Flyback PWM controller with integrated active clamp circuit) IC, and Weltrend WT6633P USB PD controller. This design shows the high-power density and efficiency that can be achieved due to the high level of integration of the SZ1131 controller.This document contains the power supply pecification,schematic, bill-of-materials, transformer documentation,printed circuit layout and performance data.

Features

  • Integrated High Voltage Active Clamp FET,Active Clamp Driver, and Start-up Regulator
  • Capable of Over 95% Efficiency
  • Flat Efficiency Across Universal (90-265 VAC)Input Voltage and Load
  • < 20mW No Load Power Consumption
  • Tight Switching Frequency Regulation forImproved Input EMI Filter Utilization
  • Up to 140 kHz Switching Frequency Operation
  • OptiModeTM Cycle-by-Cycle Adaptive DigitalControl
  • Multi-Mode Operation (Burst Mode, QuasiResonant, Valley Mode Switching)
  • Advanced Valley Mode Switching for low EMI
  • Self-Tuning Valley Detection
  • OTP, UVLO, OVLO, PCL, OPP and OSCPProtections
  • Up to 65 W Output Power for Universal AC Input
  • 100W+ Output Power with Front-End PFC

Typical applications

  • High-Power-Density USB-PD AC/DC Power Supplies

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
Application
C
VR(V (AC))
Safety Class
dV/dt(V/µs)
DF @ 1 kHz(%)
RISO
Pitch(mm)
L(mm)
W(mm)
H(mm)
Packaging
Tol. C
Size
Operating Temperature
Q
Ceramic Type
Fl(mm)
SamplesAvailability & Sample
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890334022017
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Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-FTXX Film Capacitors
ApplicationAcross the mains 
Capacitance68 nF
Rated Voltage310 V (AC)
Safety ClassX2 
Rate of Voltage Rise400 V/µs
Dissipation Factor0.1 %
Insulation Resistance30 GΩ
Pitch7.5 mm
Length10 mm
Width6 mm
Height12 mm
PackagingBulk 
Capacitance±10% 
SizePitch 7.5 mm 
Operating Temperature -40 °C up to +105 °C
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885012006020
SPECWCAP-CSGP MLCCs 16 V(DC), –, 33 pF
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 16 V(DC)
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Capacitance33 pF
Rated Voltage16 V (AC)
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Insulation Resistance10 GΩ
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Length1.6 mm
Width0.8 mm
Height0.8 mm
Packaging7" Tape & Reel 
Capacitance±5% 
Size0603 
Operating Temperature -55 °C up to +125 °C
Q-Factor1000 
Ceramic TypeNP0 Class I 
Pad Dimension0.4 mm
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885012006034
SPECWCAP-CSGP MLCCs 25 V(DC), –, 22 pF
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 25 V(DC)
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Capacitance22 pF
Rated Voltage25 V (AC)
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Insulation Resistance10 GΩ
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Length1.6 mm
Width0.8 mm
Height0.8 mm
Packaging7" Tape & Reel 
Capacitance±5% 
Size0603 
Operating Temperature -55 °C up to +125 °C
Q-Factor840 
Ceramic TypeNP0 Class I 
Pad Dimension0.4 mm
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