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BD18326NUF-M 데이터시트(PDF) 21 Page - Rohm |
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BD18326NUF-M 데이터시트(HTML) 21 Page - Rohm |
21 / 39 page 21/36 © 2020 ROHM Co., Ltd. All rights reserved. BD18326NUF-M 28.Sep.2020 Rev.001 www.rohm.com TSZ22111 • 15 • 001 TSZ02201-0T1T0B300340-1-2 Recommended Operating Conditions No. Parameter Symbol Min Typ Max Unit O-1 Supply Voltage(Note 1) (Note 2) VIN 5.5 13.0 20.0 V O-2 OUT Pin Maximum Output Current (DC) IOUT(DC) - - 400 mA O-3 OUT Pin Maximum Output Current (ON Duty: 50 %) IOUT(50%DUTY) - - 600 mA O-4 PWM Dimming Frequency fPWM 200 - 750 Hz O-5 PWM Minimum Pulse Width (Note 3) tMIN 50 - - µs O-6 Operating Temperature Topr -40 - +150 °C (Note 1) ASO should not be exceeded. (Note 2) At start up, apply 6.5 V or more once. The value is the voltage range after applying 6.5 V or more once. (Note 3) It is the same as when the pulse input to the CRT pin. External Parts Setting Range No. Parameter Symbol Min Typ Max Unit P-1 Capacitor Connecting The VIN Pin at Operating DC Mode Only(Note 3) CVIN_DC 0.47 - - μF P-2 Capacitor Connecting The VIN Pin at Operating PWM Mode(Note 3) CVIN_PWM 1.0 - - μF P-3 Capacitor Connecting The OUT Pin(Note 4) (ILED < 400 mA) COUT U400 - - 1.0 μF P-4 Capacitor Connecting The OUT Pin(Note 4) (ILED ≥ 400 mA) COUT O400 0.1 - 1.0 μF P-5 Capacitor Connecting The ISINK Pin CISINK - - 1.0 nF P-6 Capacitor for Setting CR Timer CCRT 0.047 0.100 0.220 μF P-7 Resistor for Setting CR Timer RCRT 0.1 - 50.0 kΩ P-8 Resistor for Setting Output Current RSET 4.0 - 24.0 kΩ P-9 Resistor for DCIN Pull-down RDCIN - - 10 kΩ P-10 Resistor for Setting BPCNT 1 RBP1 10.5 - 100.0 kΩ P-11 Resistor for Setting BPCNT 2 RBP2 3.3 - 30.0 kΩ P-12 Resistor for Setting BPCNT 3 RBP3 0.24 - 96.50 kΩ (Note 3) Connect CVIN_DC or CVIN_PWM within 10 mm from the IC. If they are connected more than 10 mm from the IC, there is a possibility of unstable operation such as oscillation of output current IOUT etc. So consider with enough evaluation on actual board (Note 4) If a long wire connects from the OUT pin to the LED anode, there is a possibility of output current IOUT oscillation. After consideration with enough evaluation, connect a capacitor connecting to the OUT pin COUT between the OUT pin and GND to prevent oscillation. |
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