LTC4210-1 LINER [Linear Technology], LTC4210-1 Datasheet
LTC4210-1
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LTC4210-1 Summary of contents
Page 1
... The signal at the ON pin turns the part on and off and is also used for the reset function Package This part is available in two options: the LTC4210-1 for automatic retry on overcurrent fault and the LTC4210-2 for latch off on an overcurrent fault. , LTC and LT are registered trademarks of Linear Technology Corporation. ...
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... Input Voltage (SENSE, TIMER) .. – 0. Input Voltage (ON) ..................................... –0.3V to 17V Output Voltage (GATE) ........ Internally Limited (Note 3) Operating Temperature Range LTC4210-1C/LTC4210-2C ....................... LTC4210-1I/LTC4210-2I .................... – Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 C ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are T ...
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... SUPPLY VOLTAGE (V) 4210 G04 LTC4210-1/LTC4210-2 The denotes specifications which apply over the full operating = 5V, unless otherwise noted. (Note CONDITIONS Step TIMER Step ...
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... LTC4210-1/LTC4210 TYPICAL PERFOR A CE CHARACTERISTICS I vs Temperature GATEUP –8.0 –8.5 –9 –9 15V –10.0 CC –10.5 –11 12V CC –11.5 –12.0 –75 –50 – 100 125 150 TEMPERATURE ( C) 4210 G07 I (In Initial Cycle) TIMERUP vs Supply Voltage ...
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... LOW THRESHOLD 1.20 1.15 1.10 1. SUPPLY VOLTAGE ( –75 4210 G22 LTC4210-1/LTC4210-2 TIMER Low Threshold vs Supply Voltage 0. 0.23 0.22 0.21 0.20 0.19 0.18 0.17 0.16 150 SUPPLY VOLTAGE (V) 4210 G17 ON Pin Threshold vs Temperature 1. 1.40 1.35 HIGH THRESHOLD 1 ...
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... LTC4210-1/LTC4210 TYPICAL PERFOR A CE CHARACTERISTICS V vs Supply Voltage SUPPLY VOLTAGE ( CTIO S TIMER (Pin 1): Timer Input Pin. An external capacitor C sets a 272.9ms/ F initial timing delay and a 21.7ms/ TIMER F circuit breaker delay ...
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... GND INITIAL UP/LATCH OFF UVLO CURRENT LIMIT GLITCH FILTER + COMP1 – LOGIC + COMP2 – INITIAL DOWN/NORMAL GLITCH FILTER COOL OFF COMP3 + – ON 1.3V 3 LTC4210-1/LTC4210-2 5 SENSE + 50mV – – CHARGE PUMP Z1 12V 10 A GATE 4 SHUTDOWN Z2 M5 26V 4210 BD 421012f 7 ...
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... Overcurrent faults are actively limited to 50mV/R for a specified circuit breaker timer limit. SENSE The LTC4210-1 will automatically retry after a current limit fault while the LTC4210-2 latches off. The LTC4210-1 timer function limits the retry duty cycle to 3.8% for MOSFET cooling. ...
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... SENSE NOM ( ) R SENSE MAX The maximum load current is given by Equation 3: I LIMIT MAX ( where R SENSE MIN LTC4210-1/LTC4210-2 CURRENT FLOW CURRENT FLOW TO LOAD TO LOAD SENSE RESISTOR SENSE CC , the nominal load current is given by SENSE MIN ...
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... LTC4210-1/LTC4210 APPLICATIO S I FOR ATIO sense resistor with 1% tolerance is used for current limiting, the nominal current limit is 7.14A. From Equations 2 and 6.22A and I LIMIT(MIN) 8.08A. For proper operation, the minimum current limit must exceed the circuit maximum operating load current with margin ...
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... The GATE is released with pull-up at time point 4 of Figure 3. At time point 5, GATE reaches the external MOSFET threshold V ramp up. If the R the GATE ramps at a constant rate of: V GATE T where C GATE LTC4210-1/LTC4210-2 272.9 • C ms/ F TIMER >2.5V > ...
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... LTC4210-1/LTC4210 APPLICATIO S I FOR ATIO The current through R can be divided into two SENSE components; I due to the total load capacitance CLOAD (C ) and I due to the noncapacitive load elements. LOAD LOAD The capacitive load typically dominates. For a successful start-up without current limit, I ...
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... When the circuit breaker trips, the GATE pin is pulled low. The TIMER enters latchoff mode with pull-up for the LTC4210-2 (latched-off version), while an autoretry “cool- off” cycle begins with pull-down for the LTC4210-1 (autoretry version). An autoretry cool-off delay of the LTC4210-1 between COMP2 and COMP1 thresholds takes: ...
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... U APPLICATIO S I FOR ATIO Autoretry After Current Fault (LTC4210-1) Figure 8 shows the waveforms of the LTC4210-1 (autoretry version) during a circuit breaker fault. At time point B1, the TIMER trips the COMP2 threshold of 1.3V. The GATE pin pulls to ground while TIMER begins a “cool-off” cycle with pull-down to the COMP1 threshold of 0 ...
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... If one of the conditions cannot be met, an external Zener 374 clamp shown on Figure 10a or Figure 10b can be used. The selection of R 451 package dissipation when discharging V 550 clamp. 1210 1815 LTC4210-1/LTC4210-2 discharges through the load. LOAD DSON absolute maximum rating > LTC4210 GS , and GATE absolute maximum rating > supply GS ...
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... LTC4210-1/LTC4210 APPLICATIO S I FOR ATIO R SENSE GATE (10a) BACKPLANE PCB EDGE CONNECTOR CONNECTOR (FEMALE) (MALE GND OUT CC D1* *USER SELECTED VOLTAGE CLAMP (A LOW BIAS CURRENT ZENER DIODE RECOMMENDED) 200 1N4688 (5V) 1N4692 (7V) 1N4695 (9V) 1N4702 (15V) Figure 10 ...
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... A Zener diode, a diode and COMP2 threshold sets the overvoltage threshold. Resistor R diode voltage. Diode D1 blocks forward current in the Zener during start-up or output short-circuit sets the overload noise filter. TIMER LTC4210-1/LTC4210-2 . The value of the OSS biases the Zener B TIMER 17 ...
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... LTC4210-1/LTC4210-2 U APPE DIX Table 2 lists some current sense resistors that can be used with the circuit breaker. Table 3 lists some power MOSFETs that are available. Table 4 lists the web sites of several Table 2. Sense Resistor Selection Guide CURRENT LIMIT VALUE PART NUMBER ...
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... U S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 1.22 REF 1.50 – 1.75 2.80 BSC 1.4 MIN (NOTE 4) 0.95 BSC 0.80 – 0.90 1.00 MAX 0.09 – 0.20 (NOTE 3) LTC4210-1/LTC4210-2 2.90 BSC (NOTE 4) PIN ONE ID 0.30 – 0.45 6 PLCS (NOTE 3) 0.01 – 0.10 1.90 BSC S6 TSOT-23 0302 19 421012f ...
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... LTC4210-1/LTC4210-2 U TYPICAL APPLICATIO BACKPLANE CONNECTOR (FEMALE 12V GND RELATED PARTS PART NUMBER DESCRIPTION LTC1421 Two Channel, Hot Swap Controller LTC1422 Single Channel, Hot Swap Controller in SO-8 LT1640AL/LT1640AH Negative Voltage Hot Swap Controller in SO-8 LTC1642 Single Channel, Hot Swap Controller LTC1643AL/LTC1643AH PCI Hot Swap Controller ...