ld7575ps Leadtrend Technology, ld7575ps Datasheet
ld7575ps
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ld7575ps Summary of contents
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... The LD7575 is offered in both SOP-8 and DIP-8 package. Typical Application Leadtrend Technology Corporation LD7575-DS-04b November 2007 Start-Up Circuit Features High-Voltage (500V) Startup Circuit ...
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... YY: Year code TOP MARK WW: Week code PP: Production code YYWWPP Package Top Mark SOP-8 PB Free LD7575PS SOP-8 Green Package LD7575GS DIP-8 PB Free LD7575PN FUNCTION 2 www.leadtrend.com.tw LD7575 Shipping 2500 /tape & reel 2500 /tape & reel 3600 /tube /Carton ...
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... Block Diagram UVLO 32V Comparator 16.0V/ 10. OSC Green-Mode Control Vbias COMP Leading CS Edge Blanking 5.0V OLP Comparator Leadtrend Technology Corporation LD7575-DS-04b November 2007 HV 1mA internal bias & Vref VCC OK Vref OK PWM Comparator ∑ Slope Compensation + OCP 0.85V Comparator 30mS Delay ...
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... Recommended Operating Conditions Item Supply Voltage Vcc Vcc Capacitor Switching Frequency Leadtrend Technology Corporation LD7575-DS-04b November 2007 Min. Max ...
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... OLP Trip Level OLP Delay Time (note) Note: The OLP delay time is proportional to the period of switching cycle. So that, the lower RT value will set the higher switching frequency and the shorter OLP delay time. Leadtrend Technology Corporation LD7575-DS-04b November 2007 =15.0V) CC CONDITIONS Vcc< ...
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... Temperature (°C) Fig Current Source vs. Temperature (HV=500V, Vcc=0V) 18.0 17.2 16.4 15.6 14.8 14.0 - Temperature (°C) Fig. 3 UVLO (on) vs. Temperature - Temperature (°C) Fig. 5 Frequency vs. Temperature Leadtrend Technology Corporation LD7575-DS-04b November 2007 0.90 0.89 0.88 0.87 0.86 0.85 80 120 125 -40 12 11.2 10.4 9.6 8 120 125 - ...
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... Fig. 7 Frequency vs. Vcc - Temperature ( ° C) Fig. 9 Max Duty vs. Temperature 7.0 6.5 6.0 5.5 5.0 4.5 - Temperature ( ° C) Fig open loop voltage vs. Temperature COMP Leadtrend Technology Corporation LD7575-DS-04b November 2007 120 125 -40 6.0 5.5 5.0 4 ...
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... Vcc capacitor C1. During the startup transient, the Vcc is lower than the UVLO Leadtrend Technology Corporation LD7575-DS-04b November 2007 threshold thus the current source supply a current with 1mA. Meanwhile, the Vcc supply current is as low as 100μ ...
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... UC384X, is with 2 diodes voltage offset then feeding into the voltage divider with 1/3 ratio, that is × PWM COMPARATOR 3 A pull-high resistor is embedded internally thus can be eliminated on the external circuit. Leadtrend Technology Corporation LD7575-DS-04b November 2007 − COMP F 9 www ...
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... COMP pin (VCOMP) to high. Whenever the VCOMP trips the OLP Leadtrend Technology Corporation LD7575-DS-04b November 2007 threshold 5.0V and keeps longer than 30mS (when ...
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... MOSFET gate terminal (as shown in figure 19) to provide extra protection for fault condition. This external pull-low resistor is to prevent the MOSFET from damage during power-on under the gate resistor is Leadtrend Technology Corporation LD7575-DS-04b November 2007 disconnected. In such single-fault condition, as show in Figure 18 shows its ...
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... Cgd Fig. 20 Leadtrend Technology Corporation LD7575-DS-04b November 2007 Protection Resistor on the Hi-V Path In some other Hi-V process and design, there may cause a parasitic SCR between HV pin, Vcc and GND. As shown in figure 22, a small negative spike on the HV pin may trigger this parasitic SCR and causes the latchup between dV Vcc and GND ...
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... Reference Application Circuit --- 10W (5V/2A) Adapter Schematic Leadtrend Technology Corporation LD7575-DS-04b November 2007 Pin < 0.15W when Pout = 0W & Vin = 264Vac 13 www.leadtrend.com.tw LD7575 ...
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... Holystone 0.01μF, 16V, 0805 1000pF, 50V, 0805 1000μF, 10V L-tec 470μF, 10V L-tec 0.022μF, 16V, 0805 0.1μF X-cap 2200pF Y-cap 1N4007 1N4007 1N4007 1N4007 PS102R 1N4007 2N60B 600V, 2A SB540 6V2C LD7575PS SOP-8 EL817B TL431 1% 250V, 1A N/A ...
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... Package Information SOP-8 Symbols θ Leadtrend Technology Corporation LD7575-DS-04b November 2007 Dimensions in Millimeters MIN MAX 4.801 5.004 0.189 3.810 3.988 0.150 1.346 1.753 0.053 0.330 0.508 0.013 1.194 1.346 0.047 0.178 0.229 0.007 0.102 0.254 0.004 5 ...
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... Important Notice Leadtrend Technology Corp. reserves the right to make changes or corrections to its products at any time without notice. Customers should verify the datasheets are current and complete before placing order. Leadtrend Technology Corporation LD7575-DS-04b November 2007 Dimension in Millimeters Dimensions in Inches ...
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... Add information of HV current limit resistor and gate-to-GND resistor 3. Correction on the block diagram 4. Correction on the description of Over Load Protection (OLP) Continued… Leadtrend Technology Corporation LD7575-DS-04b November 2007 a. Page 1 --- modify the general description “The LD7575 is offered in both SOP-8 and DIP-8 package.”. b. ...
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... All these parameters are for correction and no design change on the related circuits. 04 1/22/’07 Revision: Block Diagram 04a 6/5/2007 HV=500V (supplement to HV current source/ off state leakage current) 04b 11/29/2007 Green package option Leadtrend Technology Corporation LD7575-DS-04b November 2007 18 www.leadtrend.com.tw LD7575 ...