Document
LC5523D
Single-Stage Power Factor Corrected Off-Line Switching Regulator IC
Features and Benefits
• Integrated on-time control circuit (it realizes high power factor by average current control) • Integrated startup circuit (no external startup circuit necessary) • Integrated soft-start circuit (reduces power stress during start-up on the incorporated power MOSFET and output rectifier) • Integrated bias assist circuit (improves startup performance, suppresses VCC voltage droop during operation, and allows use of low-rated ceramic capacitor on VCC pin) • Integrated Leading Edge Blanking (LEB) circuit • Integrated maximum on-time limit circuit • Protection features: ▫ Overcurrent protection (OCP): pulse-by-pulse ▫ Overvoltage protection (OVP): pins VCC, OVP, and OCP, auto restart ▫ Overload protection (OLP): auto restart ▫ Thermal shutdown (TSD): latched shutdown
Description
The LC5500 series is the power IC for the LED driver which has an incorporated power MOSFET, designed for input capacitorless applications, and making it possible for systems to comply with the harmonics standard (IEC610003-2 class C). The controller adapts the average current control method for realizing high power factors, and the quasi-resonant topology contributes to high efficiency and low EMI noise. The rich set of protection features helps to realize low component counts, and high performance-to-cost power supply. The LC5523D is intended for isolated designs. The incorporated MOSFET has a VDSS(min) rating of 650 V and RDS(on)(max) of 1.9 Ω. It is capable of a maximum output power of 20 W on 230 VAC supply and 16 W on universal input supply (85 to 265VAC) based on the thermal rating. Note that the maximum output power can be up to 120% to 140% of this value. However, it may be limited in applications with low output voltage or short duty cycle.
Package: 8-pin DIP Applications
• LED lighting fixtures • LED light bulbs
Not to scale
Typical Application
F1 L1 D1 VAC C1 D3 D4 C2 C9 D9 U1 LC5523D 8 D/ST C3 Control Part S/GND VCC OCP FB 1 2 3 4 R7 C5 ROCP R3 C6 D7 PC1 C7 C18 DZ3 R4 OVP 6 D5 S/GND 5 NC PC2 R6 D6 C17 R1 R9 PC1 R12 C4 DZ2 DZ1 C12 U2 C8 R5 D2 L2 T1 D8 PC2 C10 Q1 R13 R11 C13 R17 + C14 R16 R14 R15 R18 C15 R19 R20 C16 LED C11
R8 R10
R21
LC5523D-DS
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
November 26, 2012
http://www.Datasheet4U.com
LC5523D
Single-Stage Power Factor Corrected Off-Line Switching Regulator IC
Selection Guide
Part Number
LC5523D
Package
DIP8 with pin 7 removed
The polarity value for current specifies a sink as "+," and a source as “−,” referencing the IC.
Absolute Maximum Ratings TA = 25°C, unless otherwise specified
Characteristic Drain Current1 Single Pulse Avalanche Energy2 Control Part Input Voltage OCP Pin Voltage FB Pin Voltage OVP Pin Voltage Allowable Power Dissipation of MOSFET3 Operating Ambient Temperature Storage Temperature Channel Temperature
1Refer 2Refer
Symbol IDPeak EAS VCC VOCP VFB VOVP PD1 TOP Tstg Tch Single pulse
Notes ILPeak = 2.7 A, VDD = 99 V, L = 20 mH
Pins 8–1 8–1 2–1 3–1 4–1 6–1
Rating 4.0 86 35 −2.0 to 5.0 −0.3 to 7.0 −0.3 to 5.0 0.97 55 to 125 55 to 125 150
Unit A mJ V V V V W °C °C °C
Mounted on a 15 mm × 15 mm PCB
8–1 ―− ―− ―
to MOSFET Safe Operating Area Curve. to MOSFET Avalanche Energy Derating Coefficient Curve. 3Refer to MOSFET Temperature versus Power Dissipation Curve.
LC5523D-DS
SANKEN ELECTRIC CO., LTD.
2
November 26, 2012
LC5523D
Single-Stage Power Factor Corrected Off-Line Switching Regulator IC
ELECTRICAL CHARACTERISTICS of Control Part TA = 25°C, VCC = 20 V, unless otherwise specified
Characteristics Startup Operation Operation Start Voltage Operation Stop Voltage* Operating Current Startup Circuit Operation Voltage Startup Current Startup Current Threshold Biasing Voltage-1* Startup Current Threshold Biasing Voltage-2 Normal Operation PWM Operation Frequency Maximum On-Time FB Pin Voltage Minimum Limit Maximum Feedback Current Leading Edge Blanking Time Quasi-Resonant Operation Threshold Voltage-1 Quasi-Resonant Operation Threshold Voltage-2 Protection Operation OCP Pin Overcurrent Protection (OCP) Threshold Voltage OCP Pin Source Current OCP Pin Overvoltage Protection (OVP) Threshold Voltage Overload Protection (OLP) Threshold Voltage-1 Overload Protection (OLP) Threshold Voltage-2 OVP Pin OVP Threshold Voltage VCC Pin OVP Threshold Voltage Thermal Shutdown Activating Temperature
*V CC(BIAS)1
Symbol VCC(ON) VCC(OFF) ICC(ON) VSTARTUP ICC(STARTUP) VCC= 13 V VCC(BIAS)1 VCC(BIAS)2
Test Conditions
Pins 2–1 2–1 2–1 8–1 2–1 2–1 2–1
Min. 13.8 8.4 – 42 −5.5 9.5 14.4
Typ. 15.1 9.4 – 57 −3.0 11.0 16.6
Max. 17.3 10.7 3.7 72 −1.0 12.5 18.8
Unit V V mA V mA V V
fOSC tON(MAX) VFB(MIN) IFB(MAX) tON(LEB) VBD(TH1) VBD(TH2)
8–1 8–1 4–1 4–1 3–1 3–1 3–1
11.0 30.0 0.55 −40 − 0.14 0.12
14.0 40.0 0.90 −25 500 0.24 0.17
18.0 50.0 1.25 −10 − 0.34 0.22
kHz μs V μA ns V V
VOCP IOCP VBD(OVP) VFB(OLP)1 VFB(OLP)2 VOVP(OVP) VCC(OVP) TJ(TSD)
3–1.