Datasheet LED Drivers for LCD Backlights 1ch Boost up type White LED Driver for large LCD BD9486F 1.1 General Description Key Specifications BD9486F is a high efficiency driver for white LEDs and is Operating power supply voltage range:9.0V to 18.0V designed for large LCDs. BD9486F has a boost DCDC Oscillator frequency of DCDC: 150kHz (RT=100k) converter that employs an array of LEDs as the light Operating Current: 2.6mA(Typ.) source. Operating temperature range: -40C to +85C BD9486F has some protect functions against fault conditions, such as over-voltage protection (OVP), over 1.2 Package(s) W(Typ) x D(Typ) x H(Max) current limit protection of DCDC (OCP), LED OCP SOP16 10.00mm x 6.20mm x 1.71mm protection, and Over boost protection (FBMAX). Pin pitch 1.27mm Therefore it is available for the fail-safe design over a wide range output voltage. Features DCDC converter with current mode VOUT discharge function at shutdown LED protection circuit (Over boost protection, LED OCP protection) Over-voltage protection (OVP) for the output voltage Vout Adjustable soft start Adjustable oscillation frequency of DCDC Wide range of analog dimming 0.2V to 3.0V Figure 1. SOP16 UVLO detection for the input voltage of the power stage Applications TV, Computer Display, LCD Backlighting 1.3 Typical Application Circuit(s) Figure 2. Typical Application Circuit Product structureSilicon monolithic integrated circuit This product has not designed protection against radioactive rays . www.rohm.com TSZ02201-0F1F0C100240-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/34 TSZ2211114001 15.Feb.2016 Rev.006DatasheetDatasheet BD9486F 1.4 Absolute Maximum Ratings (Ta=25C) Ratings Unit Parameter Symbol Power Supply Voltage Vccmax 20 V STB, OVP, UVLO, PWM, ADIM STB, OVP, UVLO, 20 V Terminal Voltage PWM, ADIM SS, RT, ISENSE, FB, CS, CP, SS, RT, ISENSE, FB, CS, 7 V REG50 Terminal Voltage CP, REG50 DIMOUT, GATE Terminal DIMOUT, GATE VCC V Voltage (Note 1) Power Dissipation Pd 625 mW Operating Temperature Range Topr -40 to +85 C Junction Temperature Tjmax 150 C Storage Temperature Range Tstg -55 to +150 C (Note 1) In the case of mounting 1 layer glass epoxy base-plate of 70mm70mm1.6mm, derate by 5.0mW/C when operating above Ta=25C. 1.5 Operating Ratings Parameter Symbol Range Unit Power Supply Voltage VCC 9.0 to 18.0 V DC/DC Oscillation Frequency fsw 50 to 800 kHz Effective Range of ADIM Signal VADIM 0.2 to 3.0 V PWM Input Frequency FPWM 90 to 2000 Hz 1.6 External Components Recommended Range Parameter Symbol Range Unit (Note 2) REG50 Connection Capacitance C 0.5 to 10 F REG50 (Note 2) SS Connection Capacitance C 0.001 to 2.2 F SS RT Connection Resistance R 15 to 300 k RT GATE Drive Capacitance C to 1000 pF GATE (Note 2) Please set connection capacitance above Min value of Recommended Range according to temperature characteristic and DC bias characteristic. 1.7 Pin Configuration 1.8 Physical Dimension and Marking Diagram BD9486F Lot No. Figure 3. Pin Configuration Figure4. Physical Dimension and Marking Diagram of SOP16 www.rohm.com TSZ02201-0F1F0C100240-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/34 TSZ2211115001 15.Feb.2016 Rev.006