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BD9848FV Datasheet(PDF) 2 Page - Rohm |
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BD9848FV Datasheet(HTML) 2 Page - Rohm |
2 / 5 page 2/4 REV. C ○Electrical characteristics (Unless otherwise specified, Ta=25℃,VCC=6V) Item Symbol limits Unit Conditions Min. Typ. Max. 【Triangular wave oscillator block】 Oscillation frequency fOSC 95 106 117 kHz CCP=1800pF Frequency variation fDV ― 0 1 % Vcc=3.6V→35V 【Soft-start block】 SS pin source current ISSSO 1.4 2 2.6 μA SS=0.5V SS pin sink current ISSSI 5 12 ― mA SS=0.5V 【Dead time adjustable circuit block】 DT pin input bias current IDT ― 0.1 1 μA DT=1.75V DT pin sink current IDTSI 1 3.3 ― mA DT=1.75V, (OCP+)-(OCP-)=0.5V 【UVLO block】 Threshold voltage VUTH 3.0 3.2 3.4 V Vcc when rise time Hysterisis VUHYS ― 0.15 0.25 V 【Error Amp block】 Non-Inverting input reference VINV 0.99 1 1.01 V INV=FB Reference voltage variation dVinv - 1 6 mV Vcc=3.6V→35V INV input bias current IIB ― 0 1 μA INV=1V Open loop gain AV 70 85 ― dB Output FB voltage (Hi) VFBH 2.30 ― VREF V Output FB voltage (Low) VFBL - 0.6 1.3 V Output sink current IFBSI 0.5 1.5 - mA FB=1.25V , INV=1.5V Output source current IFBSO 50 105 - μA FB=1.25V , INV=0V 【PWM comparator】 Input threshold voltage (fosc=100kHz) Vt0 1.4 1.5 1.6 V On duty 0% Vt100 1.9 2 2.1 V On duty 100% 【Output block】 Output ON resistance H RONH - 4 10 Ω RONH=( VCC -OUT)/ Iout, Iout=0.1A Output ON resistance L RONL - 3.3 10 Ω RONL=(OUT-C5V)/ Iout, Iout=0.1A C5V clamp voltage VCLMP 4.5 5 5.5 V VCLMP= VCC-C5V , VCC >7V 【Over current protection circuit (OCP) block】 OCP threshold voltage VOCPTH 0.04 0.05 0.06 V Voltage between (OCP+)-(OCP-) OCP-input bias current IOCP- - 0.1 10 μA OCP+= VCC, OCP-= VCC-0.05V Delay time for OCP tdocpth ― 200 400 nS OCP-= VCC→VCC-0.2V Min. hold time for OCP tdocpre 0.8 1.6 ― mS OCP-= VCC-0.2V→VCC 【Stand-by switch block】 Threshold voltage for each CH stop VDTthL 1.1 1.25 1.4 V DT Pin H/L Stand-by mode setting voltage range VSTBL 0 - 0.5 V Slave mode setting voltage range VSTBM 2.4 2.5 2.6 V Active(Master) mode setting voltage range VSTBH 3 - VCC V STB current ISTB ― 70 100 μA STB=6V 【Total device】 Stand-by current ICCS ― 0 1 μA STB=0V Average current consumption ICCA 1.5 3 6 mA INV=0V, FB=H, DT=1.75V ※Not designed for radiation resistance. |
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