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BD7673AG Datasheet(PDF) 10 Page - Rohm |
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BD7673AG Datasheet(HTML) 10 Page - Rohm |
10 / 21 page 10/17 Datasheet Datasheet BD7673AG TSZ02201-0F2F0A200120-1-2 © 2013 ROHM Co., Ltd. All rights reserved. 16.Jul.2015 Rev.002 www.rohm.com TSZ22111・15・001 ●Electrical Characteristics of control block (Unless otherwise noted, Ta = 25 C, VCC=12V) Parameter Symbol Specifications Unit Conditions MIN TYP MAX [PWM Type DCDC Driver Block] Oscillation Frequency FSW1 60 65 70 KHz FB=2.0V average frequency Frequency Hopping Width 1 FDEL1 - 4.0 - KHz FB=2.0V Hopping Fluctuation Frequency FCH 93 125 157 Hz Minimum Pulse Width Tmin - 500 - ns Soft Start Time 1 TSS1 0.75 1.00 1.25 ms Soft Start Time 2 TSS2 6.00 8.00 10.00 ms Maximum Duty 1 Dmax 68.0 75.0 82.0 % During normal operation Maximum Duty 2 DSS1 5.0 15.0 25.0 % During soft start 0[ms] to Tss1[ms] Maximum Duty 3 DSS2 15.0 25.0 35.0 % During soft start TSS1 [ms] to TSS2 [ms] FB pin Pull-up Resistance RFB 15 20 25 kΩ ⊿ FB / ⊿CS Rain Gain - 5 - V/V FB Burst Voltage VBST 0.20 0.30 0.40 V During FB drop FB OLP Voltage 1a VFOLP1A 2.5 2.8 3.1 V When overload is detected (FB rise) FB OLP Voltage 1b VFOLP1B - VFOLP1A-0. 2 - V When overload is detected (FB drop) FB OLP Timer TFOLP 187 250 312 ms Latch Release Voltage (VCC pin voltage) VLATCH - VUVLO2-0. 5 - V Latch release voltage VCCUVLO2-0.5 [V] Latch Mask Time TLATCH 50 100 200 us VCCOVP, COMP Mask time [Overcurrent Detection Block] Overcurrent Detection Voltage VCS 0.475 0.500 0.525 V Leading Edge Blanking Time TLEB - 250 - ns [Output Driver Block] OUT pin Pch MOS Ron RPOUT 10 25 39 Ω OUT pin Nch MOS Ron RNOUT 3 7 12 Ω [External Latch Comparator Block] COMP pin Latch Detection Voltage VCOMP - 0.5 - V COMP pin Pull-up Resistance RCOMP - 25.9 - kΩ Thermistor Resistance Detection Value RT 3.30 3.70 4.10 kΩ Thermistor connected to COMP pin |
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