1.5A LED Camera Flash Driver 2 with I C Compatible Interface BD7710GWL General Description Key Specifications The BD7710GWL is 1.5A Flash LED Driver with VBAT Input voltage 2.7V to 5.5V Synchronous rectification step up DC/DC converter that Operating temperature range -40 to +85 can drive 3LED. Quiescent Current 3.0A(MAX) It is possible to set by I2C interface. LED Current 1.6A(MAX) With synchronous rectification (no external schottky Switching frequency 2MHz(typical) barrier diode required) and small package, they can save mount space. Packages Features 1) Synchronous rectification step-up DC/DC UCSP50L2 1.902.10 0.55(MAX) converter.(no external S.B.D.) 2) 3 channel current driver (maximum total 1.6A) 3) It is possible to control register by I2C interface 4) Programmable lighting mode 5) Programmable LED current 6) Programmable Battery drop protection 7) Programmable Flash timer 8) Rich safety function Applications Over Current Protection (OCP) Single/Dual/Triple White LED Flash Supply for Over Voltage Protection (OVP) Cell Phones and Smart-Phones VOUT Short Protection DSC,DVC LED short/open Protection Video Lighting for Digital Video Applications UVLO Amusement accessory TSD Battery drop Protection LED Temperature Monitoring Typical Application Circuits Pin Configuration Bottom View CIN L E LED2 LED3 VBAT LED1 4.7F 2.2H SW SW VOUT VBAT battery D PGND PGND STRB1 NC COUT RESETB 10F 2 SCL I C I/F TX MASK TS SDA SW SW C LED1 STRB0 LED2 STRB1 LED3 RESETB STRB0 SDA SCL B TX MASK NC NC GND NC VOUT GND PGND GND TS A 1 2 3 4 Figure 2. Pin Configuration Figure 1. 1.5A application Block diagram Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays . www.rohm.com TSZ02201-0F2F0C200010-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/36 TSZ2211114001 20.May.2013 Rev.003DatasheetDatasheet BD7710GWL o Absolute Maximum Ratings (Ta=25 C) Parameter Symbol Limits Unit Maximum voltage VMAX 7 V Power Dissipation (note1) Pd 820 mW Operating Temperature Range Topr -40 to +85 Storage Temperature Range Tstg -55 to +150 o o Note1 Power dissipation deleting is 6.56 mW/ C , when its used in over 25 C. (ROHMs standard board has been mounted.) The power dissipation of the IC has to be less than the one of the package. o Operating conditions (Ta= -40 to 85 C) Parameter Symbol Limits Unit VBAT input voltage VBAT 2.7 to 5.5 V Electrical characteristics o (Unless otherwise noted, Ta = 25 C, VBAT=3.6V) Parameter Symbol Min. Typ. Max. Units Condition Supply Current Quiescent Current Iq - 0.5 3.0 A At OFF Current Consumption Idd1 9.5 - mA (Device not switching) - UVLO Voltage VUVLO 1.8 2.1 2.4 V VBAT falling edge Switching Regulator m SW NMOS on resistance Ronn - 180 - m SW PMOS on resistance Ronp - 180 - Switching frequency Fsw 1.6 2 2.4 MHz Duty cycle limit Duty - 80 - % Output voltage range Vo - - 5.5 V FB Voltage1 VFBT - 200 300 mV In Boost On, Torch mode FB Voltage2 VFBF - 400 - mV In Boost On, Flash mode 0000OVP 3:0 0100 4.5 4.65 4.8 V Over voltage Protection VOVP 5.8 6.0 6.2 V 0101OVP 3:0 1111 VOUT Short Protection Vshto - 1.5 - V Over Current Protection OCP - 2.0 - A *1 ILIM 4 =1 LED Temperature monitoring TS Current source Isource - 25 - A k TS Resistance (Warning temperature) Lwarn - 42.0 - LEDWARN bit = 1 TS Resistance (Hot temperature) Lhot - 13.8 k LEDHOT bit = 1 Current Driver Torch LED Current accuracy ITdiff -10 0 +10 % ILED=100mA Flash LED Current accuracy IFdiff -7.5 0 +7.5 % ILED= 400mA SDA, SCL -0.3 - 0.4 L level input voltage VILI V VBAT H level input voltage VIHI 1.4 - V +0.3 L level output voltage VOLI 0 - 0.3 V SDA Pin, IOL=3 mA RESETB -0.3 - 0.3 L level input voltage VILR V VBAT H level input voltage VIHR 1.0 - V +0.3 k Pull-down resistance R - 400 - PD STRB0 / STRB1 / TX MASK L level input voltage VILE -0.3 - 0.3 V VBAT H level input voltage VIHE 1.0 - V +0.3 Pull-down resistance R - 400 - k PD *1 This parameter is tested with dc measurement. www.rohm.com TSZ02201-0F2F0C200010-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/36 TSZ2211115001 20.May.2013 Rev.003