Data Sheet 0 to 19V/300mA Output Broad output DC/DC Converter(Non-isolated) BP5811 Absolute Maximum Ratings Symbol Limits Unit VMin VCTL Iopeak Topr Tstg Tcmax 25 0.3 to 5.5 300 V V mA °C °C °C 100 Recommended Action Conditions Parameter Symbol Motor driving supply voltage VMIN CTL input voltage Vctl CTL input frequency fctl Min. 19.0 0 1 Derating Curve Typ. 20.0 50 Max. 21.0 5.0 100 Unit V V kHz Conditions IO=300mA Derating Curve 350 300 250 200 150 100 50 0 Output Current Io(mA) Parameter Motor driving supply voltage CTL input voltage Maximum output current Operating temperature range Storage temperature range Maximum surface temperature Dimensions (Unit : mm) Vctl=5V Vctl=4V Vctl=3V Vctl=2V Vctl=1V -30 -20 -10 0 Electrical Characteristics 10 20 30 40 50 60 70 80 90 Ambient Temperature Ta(˚C) Conditions Output Voltage Control Characteristics (Ta=25°C) Output Voltage Vo (V) VO-VCTL Characteristics (VMin=20V) 20 Output Voltage Vo (V) (Unless otherwise specified,VMIN=20V, IO=300mA. VCTL=5.0V, Ta=25°C) Symbol Min. Parameter Typ. Max. Unit V 18.0 20.0 19.0 V Output voltage 14.3 15.9 Vo 15.1 V 6.76 7.94 7.35 mA Output current 300 Io Vp-p Output ripple 0.15 VP 0.05 % Power conversion e fficiency 88 93 20 15 10 5 0 0 1 2 3 4 5 Control Voltage (DC) VCTL(V) Application Circuit 1 2 3 6 7 8 9 L1 Vo VMin C2 C1 Pin No. 1 2 3 4 5 6 7 8 9 Function Input terminal N.C. GND Skip Skip Coil connection terminal Coil connection terminal Control terminal Output voltage CTL Be sure to use fuse for safety. External Component Specifications FUSE: Fuse C1: Input smoothing capacitor C2: Output smoothing capacitor L1: Power inductor Use a quick-acting fuse (2.3A) 470 F/50V Low impedance Recommended part : PM series (Nichicon) 470 F/50V Low impedance Recommended part : PM series (Nichicon) 47 H, Rated current 1.2A or higher Recommended part : TSL0808-470K1R2 (TDK) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/1 VO-Duty Characteristics (VMin=20V) 15 10 5 0 0 20 40 60 80 100 Control Duty fCTL=50kHz Duty(%) Conversion Efficiency (VMin=20V, VCTL=5V) Conversion Efficiency (%) BP5811 100 90 80 70 60 50 40 30 20 10 0 0 50 100 150 200 250 300 Output Current IO (mA) 2010.03 - Rev. B