LT1640AH LINER [Linear Technology], LT1640AH Datasheet
LT1640AH
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LT1640AH Summary of contents
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... The LT1640AL is designed for modules with a low enable input and the LT1640AH for modules with a high enable input. The LT1640AL/LT1640AH are available in 8-pin PDIP and SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. ...
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... OVHY I OV Pin Input Current INOV 2 U RATINGS (Note 1), All Voltages Referred to V Operating Temperature Range LT1640ALC/LT1640AHC ........................ LT1640ALI/LT1640AHI ...................... – Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 ORDER PART NUMBER LT1640ALCN8 PWRGD 1 LT1640ALCS8 ...
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... Figures 1, 2 Figures 1, 3 Figures 1, 4 (LT1640AL) Figures 1, 5 (LT1640AH) Figures 1, 5 (LT1640AL) Figures 1, 5 (LT1640AH) Figures 1, 5 Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to V specified. Supply Current vs Temperature 1.6 ...
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... TEMPERATURE ( C) 1640A G08 When the DRAIN pin of the LT1640AH is above This pin can more than V EE DRAIN pin which pulls the module’s enable pin low, forcing it off. When sink current is turned off and a 6.5k resistor is connected between PWRGD and DRAIN, allowing the module’ ...
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... The input supply voltage ranges from 10V to 80V AND CC REFERENCE GENERATOR LOGIC AND GATE DRIVE 50mV + – – + SENSE GATE LT1640AL/LT1640AH and SENSE can be shorted together. EE – < 50mV. The GATE pin is pulled SENSE EE . The part is not REF OUTPUT PWRGD/PWRGD DRIVE + – – ...
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... PHLOV GATE 1V Figure GATE Timing 50mV SENSE t PHLSENSE GATE 1V Figure 4. SENSE to GATE Timing PWRGD/PWRGD DRAIN LT1640AL/LT1640AH UV GATE SENSE EE V 1640A F01 Figure 1. Test Circuit 2V 1.203V PLHOV GATE 1V 1640A F02 1.8V DRAIN V PWRGD V 1640A F04 1 ...
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... SENSE GATE DRAIN 150nF 18k 5% 3.3nF 25V 5% 100V IRF530 Figure 6a. Inrush Control Circuitry LT1640AL/LT1640AH = (45 A • the total load capacitance equal VICOR VI-J3D- 0.1 F 100 F IN OUT 100V 100V + GATE IN – – ...
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... LT1640AL/LT1640AH U U APPLICATIO S I FOR ATIO Capacitor C1 and resistor R3 prevent Q1 from momen- tarily turning on when the power pins first make contact. Without C1 and R3, capacitor C2 would pull the gate voltage roughly equal the LT1640A could power up and actively pull the gate low ...
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... If we choose R = 100 , we will get GND GND 562k UV = 37V 9.09k OV = 71V 10k * – 48V 1640A F07 * DIODES INC. SMAT70A Figure 8. Extending the Short-Circuit Protection Delay LT1640AL/LT1640AH – – V – the voltage drop across the sense resistor ...
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... LT1640AL/LT1640AH U U APPLICATIO S I FOR ATIO Under some conditions, a short circuit at the output can cause the input supply to dip below the UV threshold, resetting the circuit breaker immediately. The LT1640A then cycles on and off repeatedly until the short is removed. This can be minimized by adding a ...
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... LT1640AL R5 LT1640AH R5 1.223 – 48V Figure 10a. Undervoltage and Overvoltage Sensing (SHORT PIN) GND 8 R4 506k LT1640AL /LT1640AH 562k SENSE EE 8.87k 16.9k 1.62M 0. LT1640AL/LT1640AH ...
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... GATE R 3 LT1640AH has a PWRGD output for modules with an active high enable input. When the DRAIN voltage of the LT1640AH is high with respect to V turned off and R7 and Q2 clamp the PWRGD pin one diode 1 • 2 ...
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... – – DRAIN SENSE GATE Figure 12. Active Low Enable Module LT1640AL/LT1640AH ) without requiring an exter- EE ACTIVE LOW ENABLE MODULE + + OUT + ON/OFF C3 – – OUT 1640A F12 EE 13 ...
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... LT1640AL/LT1640AH U U APPLICATIO S I FOR ATIO (SHORT PIN) GND GND R4 562k 9.09k 10k – 48V * DIODES INC. SMAT70A PACKAGE DESCRIPTIO 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0 ...
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... TYP 0.014 – 0.019 (0.355 – 0.483) TYP LT1640AL/LT1640AH 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1 ...
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... LT1640AL/LT1640AH U TYPICAL APPLICATION Using an EMI Filter Module Many applications place an EMI filter module in the power path to prevent switching noise of the module from being injected back onto the power supply. A typical application (SHORT PIN) GND GND 562k V PWRGD DRAIN ...