LT4250H LINER [Linear Technology], LT4250H Datasheet
LT4250H
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LT4250H Summary of contents
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... The LT4250L is designed for modules with a low enable input and the LT4250H for modules with a high enable input. The LT4250L/LT4250H 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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... OVH V OV Pin Low Threshold Voltage OVL 2 U RATINGS (Note 1), All Voltages Referred to V Operating Temperature Range LT4250LC/LT4250HC ............................. LT4250LI/LT4250HI .......................... – Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 ORDER PART NUMBER LT4250LCN8 PWRGD 1 ...
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... Current Limit to GATE Low PHLCB t DRAIN Low to PWRGD Low PHLDL DRAIN Low to (PWRGD – DRAIN) High (LT4250H) Figures 1a GATE High to PWRGD Low PHLGH GATE High to (PWRGD – DRAIN) High Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired ...
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... This condition is latched until the GATE pin is turned off via is within V the UV, OV, UVLO or the electronic circuit breaker. DRAIN DL . This pin can be GATE When the DRAIN pin of the LT4250H is above V than more PWRGD pin will sink current to the DRAIN pin which pulls EE from V , the the module’ ...
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... GATE DELAY DRIVER + + + – GATE V SENSE EE LT4250L/LT4250H and SENSE can be shorted EE – < 50mV and the V SENSE EE . The GATE pin is pulled high by a UVLOH , the PWRGD/PWRGD pin will latch to indicate pin is greater than DD threshold. UVLOH OUTPUT PWRGD/PWRGD DRIVE – ...
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... PHLDL PWRGD 1V V 4250 F05a PWRGD Figure 5b. GATE to PWRGD/PWRGD Timing + 20V – PWRGD/PWRGD 48V – OV DRAIN LT4250L/LT4250H 10k 10 UV GATE 0 SENSE EE Figure 1b. Test Circuit 2 1.125V 1.255V t PHLUV 1V Figure GATE Timing t PHLCB 1V 1V Figure 4b. Active Current Limit Timeout 1.4V – ...
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... F GATE –V 100V + C5 1 PWRGD GATE IN 100 F 16V – – OUT DRAIN 7 C2 4250 F06a LT4250L/LT4250H is the total load capacitance = module • C2/C EE GS(Q1 INMAX 72V INMAX is the MOSFET’s minimum gate threshold and MODULE INRUSH ...
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... LT4250L/LT4250H U U APPLICATIONS INFORMATION Current Limit/Electronic Circuit Breaker The LT4250 features a current limit function that protects against short circuits or excessive supply currents. If the current limit is active for more than 500 s the electronic circuit breaker will trip. By placing a sense resistor between the V ...
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... Q3 ZVN3310 R8 R1 510k 0. NODE 2 50V/DIV GATE 2V/DIV 1s/DIV Figure 10. Automatic Restart After Current Fault LT4250L/LT4250H 8 R4 549k LT4250H PWRGD 6.49k SENSE GATE DRAIN EE 10k 220 3.3nF 5% 10 ...
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... 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 LT4250L has a PWRGD output for modules with an active low enable input, and the LT4250H has a PWRGD output for modules with an active high enable input. ...
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... Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) 0.053 – 0.069 (1.346 – 1.752) 0.004 – 0.010 (0.101 – 0.254) 0 – 8 TYP 0.014 – 0.019 0.050 (1.270) (0.355 – 0.483) BSC TYP LT4250L/LT4250H LT4250L PWRGD SENSE GATE ...
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... LT4250L/LT4250H 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 –48V RTN (SHORT PIN) –48V RTN PWRGD 549k ...