BL8532 White LED PFM Step-Up DC-DC Converter Outline: Features: Applications Selection guide BL8532 XX X XX Pin configuration Package Description http://www.belling.com.cn - 1Total 13 Pages 8/8/2006 BL8532 Functional block diagram Absolute maximum ratings: Recommended operating conditions: MIN NOM MAX UNIT * * * Suggestion http://www.belling.com.cn - 2Total 13 Pages 8/8/2006 BL8532 Electrical characteristics: Symbol Item Test conditions Reference data Min Typ. Max Unit IFB DD2 *5 noload *6 LX LXleak leak Stand-by current CEH threshold voltage CEL threshold voltage OM OM Note: 6 . http://www.belling.com.cn - 3Total 13 Pages 8/8/2006 BL8532 Typical applications: ( http://www.belling.com.cn - 4Total 13 Pages 8/8/2006 BL8532 Detailed description: V IFB Iout R1 R2 Iout Vout 1 VIFB Selection of the external components: http://www.belling.com.cn - 5Total 13 Pages 8/8/2006 BL8532 D 1 Vout Vin Vout Inductor Selection L min D(1 D) 2 RL 2f D Vin Lf Vin Im ax (1 D) 2 RL I DVin 2 Lf rL Rload (1 D) 2 2 Capacitor Selection r http://www.belling.com.cn Vout Vout D Rload Cf - 6Total 13 Pages 8/8/2006 BL8532 Im ax RESR Vout r' r 3 Diode Selection 4 Input Capacitor 5 Resistor R1 R2 for output voltage detect Vout VIFB ( 6 Selection of L R1 1 R2 Vout 1) R 2 VIFB C and compensation capacitor C1 Vout http://www.belling.com.cn L 2 I L Vout 2 C - 7Total 13 Pages Vout 8/8/2006 BL8532 Test circuits: http://www.belling.com.cn - 8Total 13 Pages 8/8/2006 BL8532 http://www.belling.com.cn - 9Total 13 Pages 8/8/2006 BL8532 http://www.belling.com.cn - 10Total 13 Pages 8/8/2006 BL8532 Typical characteristic: BL8532-20PSN Output Current VS. Input Voltage BL8532-20PSN Efficiency VS. Input Voltage(Iout=100mA) BL8532-20PSN Efficiency VS. Input Voltage(Iout=200mA) BL8532-20PSN Efficiency VS. Input Voltage(Iout=300mA) BL8532-20PSN Ripple Voltage VS. Input Voltage(Iout=100mA) BL8532-20PSN Ripple Voltage VS. Input Voltage(Iout=200mA) Input Voltage (V) BL8532-20PSN Ripple Voltage VS. Input Voltage(Iout=300mA) http://www.belling.com.cn - 11Total 13 Pages 8/8/2006 BL8532 Package description: http://www.belling.com.cn - 12Total 13 Pages 8/8/2006 BL8532 http://www.belling.com.cn - 13Total 13 Pages 8/8/2006