sc1405d Semtech Corporation, sc1405d Datasheet
sc1405d
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sc1405d Summary of contents
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... POWER MANAGEMENT Description The SC1405D is a Dual-MOSFET Driver with an internal Overlap Protection Circuit to prevent shoot-through. Each driver is capable of driving a 3000pF load in 15ns rise/ fall time and has ULTRA-LOW propagation delay from in- put transition to the gate of the power FETs. Adaptive Overlap Protection circuit ensures that the synchronous FET does not turn on until the top FET source has reached a voltage low enough to prevent shoot-through ...
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... µ SC1405D ...
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... ° SC1405D ...
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... SC1405D ...
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... DSPS_DR << <<< Output Feedback to PWM Controller Timing Diagram 2005 Semtech Corp 1N5819 .22uF 8 14 Vcc BST 3 GND PRDY 2 DRN DELAY OVP_S 11 2.2 DSPS_DR 5 10 S_MOD PGND SC1405D Ov er-Voltage Sense 5 SC1405D + MTB75N03 75A,30V + + MTB75N03 75A,30V www.semtech.com + ...
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... µ SC1405D ° ...
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... Class-D amplifiers. Theory of Operation The control input (CO) to the SC1405D is typically sup- plied by a PWM controller that regulates the power sup- ply output. (See Application Evaluation Schematic on page 12). The timing diagram demonstrates the sequence of events by which the top and bottom drive signals are applied ...
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... FET. This is assuming that the impedance of the drive path is too high compared to the instantaneous imped- ance of the capacitors. (since dV/dT and thus the effec- tive frequency is very high). If the BG pin of the SC1405D is very close to the bottom FET, Vspike will be reduced depending on trace inductance, rate if rise of current, etc ...
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... FET’s gate drive, if S-MOD is held High. OVP_S/OVER TEMP SHUTDOWN Output over-voltage protection (OVP) may be implemented on the SC1405D independent of the PWM controller . A voltage divider from the output is compared with the in- ternal bandgap voltage of 1.2V (typical). Upon exceeding this voltage, the overvoltage comparator disables the top ...
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... Semtech Corp. Timing diagram: Ch1: CO input Ch2: TG drive Ch3: BG non-overlap drive Ch4: phase node Iout = 20A (10A/phase) Refer to Eval. Schematic (fig.3) Timing diagram: Rise/Fall times Ch1: TG drive Ch2: BG drive Cursor: Tpdh Iout = 20A (10A/phase) Refer to Eval. Schematic (fig.3) 10 SC1405D TG www.semtech.com ...
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... POWER MANAGEMENT Typical Characteristics (Cont.) 600.00 500.00 400.00 300.00 200.00 100.00 0.00 -25 Typical Delay vs. Overdrive (T=25C) 10000 1000 100 10 2005 Semtech Corp. SC1405D OVP Delay vs. Temperature - Temperature (C) 50mV Overdrive 100mV Overdrive Overdrive (mV) 11 SC1405D 75 95 115 135 1000 www.semtech.com ...
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... POWER MANAGEMENT Evaluation Board Schematic 2005 Semtech Corp SC1405D www.semtech.com ...
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... aaa bbb ccc GAGE bxN PLANE bbb C A-B D 0.25 A SEE DETAIL - DETERMINED AT DATUM PLANE 13 SC1405D DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX - - - - .047 1. .002 .006 0.05 0. .031 .042 0.80 1. .007 .012 0.19 0. ...
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... COMPANY'S MANUFACTURING GUIDELINES ARE MET. Contact Information Phone: (805)498-2111 FAX (805)498-3804 2005 Semtech Corp. DIM INCHES (.222 Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 14 SC1405D DIMENSIONS MILLIMETERS (5.65) .161 4.10 .026 0.65 .016 0.40 .061 1.55 .283 7.20 www.semtech.com ...