Datasheet White LED Driver With PWM Brightness Control for up to 11 LEDs in Series BD60A00NUX BD60A60NUX General Description Key Specifications This IC is boost DC/DC converter that can drive white Operating power supply voltage range: 2.7V to 5.5V LED with constant current. More stabled white LED LED maximum current: 30mA (Max.) lighting can be achieved by direct current connection Switching Frequency: 600kHz(Typ.) without electric tolerance and High-speed response by Quiescent Current: 0.1A (Typ.) current mode. Moreover, separating IC power supply Operating temperature range: -40C to +85C (2.7V to 5.5V) and coil power supply (2.3V to 20V) makes it possible to widen input range, which will be Package W(Typ.) x D(Typ.) x H(Max.) helpful to be applied to various kinds of applications. Over voltage setting can be selected corresponding to the number of LED lightings. BD60A00NUX is for max 11 lightings, BD60A60NUX is for max 6 lightings. Features Boost DC/DC converter Drive LED 11 lightings (VOUT=3.6V11+0.7V=40.3V <VF MAX=3.7V>) BD60A00NUX VSON008X2030 Brightness control by outside PWM signal (PWM 2.00mm x 3.00mm x 0.60mm frequency =100Hz to 30kHz, 25kHz 1% dimming application) Brightness control by DC input Soft start function (1ms Typ.) Applications Over voltage protection Digital video cameras, digital single-lens reflexes, BD60A00NUX: 42V (Typ.) digital still cameras, digital photo frames, personal BD60A60NUX: 28V (Typ.) navigations (PND), mobile phones, smart phones, MID, SBD open protection and output short protection PDA, hand-held computers, MP3 players, GPS, digital Over current protection media players, etc. LED terminal over voltage protection UVLO Typical Application Circuit L1 11 LEDs Coil Power 10H 2.3V to 20V COUT D1 2.2F Ccoil 4.7F SW VOUT IC Power VIN 2.7V to 5.5V CIN 1F FB BD60AxxNUX ISET PWM GND EN Enable control PWM control Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays www.rohm.com TSZ02201-0G3G0C200320-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/22 TSZ2211114001 07.Nov.2016 Rev.003Datasheet BD60A00NUX BD60A60NUX Absolute Maximum Ratings Parameter Symbol Ratings Unit Condition Maximum applied voltage 1 VMAX1 7 V VIN, EN, PWM, ISET terminals FB, SW, VOUT terminals Maximum applied voltage 2 VMAX2 45 V BD60A00NUX FB, SW, VOUT terminals Maximum applied voltage 3 VMAX3 31 V BD60A60NUX Operating temperature range Topr -40 to +85 C Storage temperature range Tstg -55 to +150 C *1 Power dissipation 1 Pd1 2000 mW *1 4 layer (ROHM Standard board) has been mounted. When its used by more than Ta=25C, its reduced by 20mW/C. Recommended Operating Ratings (Ta=-40C to +85C) Parameter Symbol Ratings Unit Conditions Operating power supply voltage VIN 2.7 to 5.5 * V VIN terminal Operating coil voltage Vcoil 2.3 to 20 V Coil voltage *When the operating supply voltage is over 4.61V for BD60A00NUX, please refer the application P.16 Electrical Characteristics (Unless otherwise specified, Ta=25C, VIN=3.6V) Limits Parameter Symbol Unit Conditions Min. Typ. Max. Quiescent Current Iq - 0.1 1.0 A EN=0V Current Consumption IddNB - 1.5 3.0 mA EN=2.8V, PWM=0V (No Boost) Current Consumption (Boost) IddB - 2.5 5.0. mA EN=2.8V, PWM=2.8V EN, PWM Terminal Low Input Voltage range VthL - - 0.5 V High Input Voltage range VthH 1.3 - - V Pull down register Rcnt 65 100 135 k Switching Regulator FB Terminal Control Voltage FB 0.56 0.70 0.84 V Switching Frequency fSW - 600 - kHz Max Duty Duty 90 95 - % FB=0V SW Transistor ON Resistor Ronn - 2 - Isw=80mA SW Transistor Leak Current IqSW - 0.1 2.0 A EN=0V Protection Over Current Limit Icoil - 750 - mA *1 Over Voltage Limit OVP1 40 42 44 V Detect voltage of VOUT terminal BD60A00NUX Over Voltage Limit OVP2 26 28 30 V Detect Voltage of VOUT terminal BD60A60NUX Over Voltage Limit Hysteresis OVPhy - 1 - V VOUT Terminal Leak Current IqVOUT - 0.1 1.0 A EN=0V Shot key Diode Open Protection Sop - 0.2 - V Detect Voltage of VOUT terminal LED Terminal LEDOVP 4.4 5.9 6.4 V PWM=2.8V Over Voltage Protection Detect Voltage of Low Voltage UVLO - 2.2 - V VIN falling edge Current Driver LED Maximum Current ILMAX - - 30 mA VIN=4V, COUT=1F LED Current Accuracy ILACCU - - 3.0 % ILED=20mA Current Limit Value at LED Current Limit ILOCP - 0 0.2 mA ISET Resistor 1k Setting LED Leak Current IqLED - 0.1 2.0 A EN=0V ISET Terminal Voltage Iset - 0.6 - V *1 This parameter is tested with DC measurement. www.rohm.com TSZ02201-0G3G0C200320-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/22 TSZ2211115001 07.Nov.2016 Rev.003