LT1640L Linear Technology Corporation, LT1640L Datasheet
LT1640L
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LT1640L Summary of contents
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... The LT1640L is designed for modules with a low enable input and the LT1640H for modules with a high enable input. The LT1640L/LT1640H is 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 LT1640LC/LT1640HC ............................. LT1640LI/LT1640HI .......................... – Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 ORDER PART NUMBER LT1640LCN8 PWRGD 1 LT1640LCS8 ...
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... Figures 1, 2 Figures 1, 3 Figures 1, 4 (LT1640L) Figures 1, 5 (LT1640H) Figures 1, 5 (LT1640L) Figures 1, 5 (LT1640H) 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 ...
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... PWRGD/PWRGD (Pin 1): Power Good Output Pin. This pin will toggle when V is within V DRAIN be connected directly to the enable pin of a power module. When the DRAIN pin of the LT1640L is above V than V , the PWRGD pin will be high impedance, allowing PG the pull-up current of the module’s enable pin to pull the pin high and turn the module off ...
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... The input supply voltage ranges from 10V to 80V AND CC REFERENCE GENERATOR LOGIC AND GATE DRIVE 50mV + – – + SENSE GATE LT1640L/LT1640H and SENSE can be shorted together. EE – < 50mV. The GATE pin is pulled SENSE REF OUTPUT PWRGD/PWRGD DRIVE + – – PG ...
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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 V OV LT1640L/LT1640H UV GATE SENSE EE Figure 1. Test Circuit 2V 1.203V PLHOV GATE 1V 1640 F02 DRAIN PWRGD 1640 F04 DRAIN PWRGD V – V ...
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... GATE DRAIN 1N4148 150nF 18k 5% 3.3nF 25V 5% 100V IRF530 Figure 6a. Inrush Control Circuitry LT1640L/LT1640H = (45 A • the total load capacitance module VICOR VI-J3D- 0.1 F 100 F IN OUT 100V 100V + GATE IN – – ...
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... LT1640L/LT1640H U U APPLICATIONS INFORMATION 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 LT1640 could power up and actively pull the gate low. ...
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... Figure 8. Extending the Short-Circuit Protection Delay LT1640L/LT1640H – – V – the voltage drop across the sense resistor O (SHORT PIN LT1640L PWRGD SENSE GATE DRAIN 1N4148 150nF 18k ...
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... Figure 9. Automatic Restart After Current Fault . Resistor R8 turns off Q2. When a short EE . Diode D1 clamps node 3 one diode drop EE . The duty cycle is set to 10% to prevent Q1 from LT1640L PWRGD + C3 100 F 100V GATE DRAIN 6 7 1N4148 150nF ...
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... LT1640L R5 LT1640H R5 1.223 – 48V Figure 10a. Undervoltage and Overvoltage Sensing (SHORT PIN) GND 8 R4 506k LT1640L /LT1640H 562k SENSE EE 8.87k 16.9k 1.62M 0. LT1640L/LT1640H 8 1640 F10a ...
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... • 2 With R4 = 506k 8.87k and V overvoltage threshold will be 71V. PWRGD/PWRGD Output The PWRGD/PWRGD output can be used to directly en- able a power module when the input voltage to the module is within tolerance. The LT1640L has a PWRGD output for 1 • – V • modules with an active low enable input, and the LT1640H ...
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... U U APPLICATIONS INFORMATION When the DRAIN voltage of the LT1640L is high with respect the internal pull-down transistor Q2 is off EE and the PWRGD pin high impedance state (Fig- ure 12). The PWRGD pin will be pulled high by the module’s internal pull-up current source, turning the module off. ...
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... LT1640L/LT1640H PACKAGE DESCRIPTION 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0.889 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm Package 8-Lead PDIP (Narrow ...
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... TYP 0.014 – 0.019 (0.355 – 0.483) TYP LT1640L/LT1640H 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1 ...
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... A typical application (SHORT PIN) GND GND 562k V PWRGD DD 1% 1N4148 DRAIN C2 R5 LT1640L 9.09k 3.3nF 2 6 100V 1% OV GATE R6 V SENSE EE 10k 150nF R1 ...