SG6742HL/HR 90VAC 264VAC SG6742HLSY SG6742HRSY SG6742HL SG6742HR 6742HL 6742HR - Datasheet Archive

 

Highly Integrated Green-Mode PWM Controller Features Description The highly integrated SG6742HL/HR PWM controller provides

 

SG6742HL/HR SG6742HL/HR Highly Integrated Green-Mode PWM Controller Features Description The highly integrated SG6742HL/HR SG6742HL/HR PWM controller provides several features to enhance the performance of flyback converters. High-Voltage Startup Low Operating Current: 2.7mA Linearly Decreasing PWM Frequency to 22KHz To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to linearly decrease the switching frequency at light-load conditions. To avoid acoustic-noise problems, the minimum PWM frequency is set above 22KHz. This green-mode function enables the power supply to meet international power conservation requirements. With the internal high-voltage startup circuitry, the power loss due to bleeding resistors is eliminated. To further reduce power consumption, SG6742HL/HR SG6742HL/HR is manufactured using the BiCMOS process, which allows an operating current of 2.7mA. Frequency Hopping to Reduce EMI Emission Fixed PWM Frequency: 100KHz Peak-Current-Mode Control Cycle-by-Cycle Current Limiting Leading-Edge Blanking (LEB) Synchronized Slope Compensation Internal Open-Loop Protection GATE Output Maximum Voltage Clamp: 18V VDD Under-Voltage Lockout (UVLO) VDD Over-Voltage Protection (OVP) Programmable Over-Temperature Protection (OTP) Internal Latch Circuit (OVP, OTP) Internal-Sense, Short-Circuit Protection Built-in 6ms Soft-Start Function Constant Power Limit (Full AC Input Range) Internal OTP Sensor with Hysteresis Applications General-purpose switch-mode power supplies and flyback power converters, including: SG6742HL/HR SG6742HL/HR integrates a frequency-hopping function internally that helps reduce EMI emission of a power supply with minimum line filters. Its built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary, internal line compensation ensures constant output power limit over a wide AC input voltage range, from 90VAC 90VAC to 264VAC 264VAC. SG6742HL/HR SG6742HL/HR - Highly Integrated Green-Mode PWM Controller April 2009 SG6742HL/HR SG6742HL/HR provides many protection functions. In addition to cycle-by-cycle current limiting, the internal open-loop protection circuit ensures safety should an open-loop or output short-circuit failure occur. PWM output is disabled until VDD drops below the UVLO lower limit, when the controller starts up again. As long as VDD exceeds ~25V, the internal OVP circuit is triggered. SG6742HL/HR SG6742HL/HR is available in an 8-pin SOP package. Power Adapters Open-Frame SMPS Ordering Information Part Number Operating Temperature Range OLP Function Package Eco Status Packing Method SG6742HLSY SG6742HLSY -40 to +105°C Latch 8-Lead Small Outline Package (SOP) Green Tape & Reel SG6742HRSY SG6742HRSY -40 to +105°C Restart 8-Lead Small Outline Package (SOP) Green Tape & Reel For Fairchild's definition of "green" Eco Status, please visit: . © 2008 Fairchild Semiconductor Corporation SG6742HL/HR SG6742HL/HR · Rev. 1.0.4 www.fairchildsemi.com Figure 1. Typical Application Internal Block Diagram SG6742HL SG6742HL SG6742HL/HR SG6742HL/HR - Highly Integrated Green-Mode PWM Controller Application Diagram SG6742HR SG6742HR Figure 2. Functional Block Diagram © 2008 Fairchild Semiconductor Corporation SG6742HL/HR SG6742HL/HR · Rev. 1.0.4 www.fairchildsemi.com 2 F - Fairchild Logo Z - Plant Code X - 1-Digit Year Code Y - 1-Digit Week Code TT - 2-Digit Die Run Code T - Package Type (S=SOP) P - Y: Green Package M - Manufacture Flow Code ZXYTT 6742HL 6742HL TPM ZXYTT 6742HR 6742HR TPM Figure 3. Top Mark Pin Configuration SOP-8 GND 1 8 GATE FB 2 7 VDD NC 3 6 SENSE HV 4 5 RT SG6742HL/HR SG6742HL/HR - Highly Integrated Green-Mode PWM Controller Marking Information Figure 4. Pin Configuration (Top View) Pin Definitions Pin # Name Description 1 GND 2 FB 3 NC No connection. 4 HV For startup, this pin is pulled high to the line input or bulk capacitor via resistors. 5 RT For over-temperature protection, an external NTC thermistor is connected from this pin to the GND pin. The impedance of the NTC decreases at high temperatures. Once the voltage of the RT pin drops below a fixed limit, PWM output is latched. 6 SENSE Current sense. The sensed voltage is used for peak-current-mode control and cycle-by-cycle current limiting. 7 VDD Power supply. The internal protection circuit disables PWM output as long as VDD exceeds the OVP trigger point. 8 GATE Ground. The signal from the external compensation circuit is fed into this pin. The PWM duty cycle is determined in response to the signal on this pin and the current-sense signal on the SENSE pin. The totem-pole output driver. Soft driving waveform is implemented for improved EMI. © 2008 Fairchild Semiconductor Corporation SG6742HL/HR SG6742HL/HR · Rev. 1.0.4 www.fairchildsemi.com 3 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit 30 (1, 2) V VVDD DC Supply Voltage VFB FB Pin Input Voltage -0.3 7.0 V SENSE Pin Input Voltage -0.3 7.0 V VRT RT Pin Input Voltage -0.3 7.0 V VHV HV Pin Input Voltage 500 V PD Power Dissipation (TA50°C) 400 mW JA Thermal Resistance (Junction-to-Air) 141 °C/W TJ Operating Junction Temperature -40 +125 °C Storage Temperature Range -55 +150 °C +260 °C VSENSE TSTG TL ESD Lead Temperature (Wave Soldering or IR, 10 Seconds) Human Body Model, JEDEC:JESD22-A114 JESD22-A114 All pins except HV pin 4.0 Charged Device Model, JEDEC:JESD22-C101 JESD22-C101 All pins except HV pin 1.5 kV Notes: 1. All voltage values, except differential voltages, are given with respect to the network ground terminal. 2. Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. © 2008 Fairchild Semiconductor Corporation SG6742HL/HR SG6742HL/HR · Rev. 1.0.4 SG6742HL/HR SG6742HL/HR - Highly Integrated Green-Mode PWM Controller Absolute Maximum Ratings www.fairchildsemi.com 4 VDD=15V and TA=25°C unless otherwise noted. Symbol Parameter Conditions Min. Typ. Max. Units 22 V V VDD Section VOP VDD-ON VDD-OFF Continuously Operating Voltage Start Threshold Voltage 14.5 Operating Supply Current V µA 3.7 mA VDD=15V, GATE Open VTH-OLP+0.1V 10.5 VDD-ON ­ 0.16V IDD-OP 9.5 30 Startup Current 16.5 8.5 Minimum Operating Voltage IDD-ST 15.5 2.7 IDD-OLP Internal Sink Current 30 60 90 µA VTH-OLP IDD-OLP off Voltage 6.5 7.5 8.0 V VDD-OVP VDD Over-Voltage Protection 24 25 26 V tD-VDDOVP VDD Over-Voltage Protection Debounce Time 75 125 200 µs 1.75 2.30 3.35 mA 1 20 µA 90 100 110 ±4.2 ±4.7 ±5.2 HV Section IHV IHV-LC Supply Current from HV Pin VAC=90V (VDC=120V), VDD=0V Leakage Current After Startup HV=500V, VDD=VDDOFF+1V Oscillator Section Center Frequency fOSC Frequency in Normal Mode tHOP Hopping Period 4.9 5.6 6.3 ms Green-Mode Frequency 18 22 25 KHz fOSC-G Hopping Range KHz fDV Frequency Variation vs. VDD Deviation VDD=11V to 22V 5 % fDT Frequency Variation vs. Temperature Deviation TA=-40 to 105°C 5 SG6742HL/HR SG6742HL/HR - Highly Integrated Green-Mode PWM Controller Electrical Characteristics % Continued on the following page. PWM Frequency fOSC fOSC-G VFB-ZDC VFB-G VFB-N VFB Figure 5. VFB vs. PWM Frequency © 2008 Fairchild Semiconductor Corporation SG6742HL/HR SG6742HL/HR · Rev. 1.0.4 www.fairchildsemi.com 5 VDD=15V and TA=25°C unless otherwise noted. Symbol Parameter Conditions Min. Typ. Max. Units 1/4.15 1/4.00 1/3.85 V/V 7 k 5.0 V Feedback Input Section AV Input Voltage to Current-Sense Attenuation ZFB Input Impedance VFB-OPEN Output High Voltage VFB-OLP 4 FB Open-Loop Trigger Level FB Pin Open 5.2 4.6 4.8 V tD-OLP Delay Time of FB Pin Open-loop Protection 50 56 62 ms VFB-N Green-Mode Entry FB Voltage 3.1 3.3 3.5 V VFB-G Green-Mode Ending FB Voltage VFB-ZDC VFB-N- V 1.6 V 0.5 Zero Duty-Cycle Input Voltage Current-Sense Section ZSENSE Input Impedance VSTHFL Current Limit Flatten Threshold Voltage Duty cycle=45% 0.97 1.00 12 1.03 K V VSTHVA Current Limit Valley Threshold Voltage VSTHFL­VSTHVA 0.27 0.30 0.33 V tPD Delay to Output 100 200 ns tLEB Leading-Edge Blanking Time 100 140 180 ns VS-SCP Threshold Voltage for SENSE Short-Circuit Protection 0.10 0.15 0.20 V tD-SSCP Delay Time for SENSE Short-Circuit Protection VSENSE