BD7757MWX-E2 ROHM

Datasheet 1.5A LED Camera Flash Driver Synchronous Rectification Step-Up DC/DC BD7757MWX General Description Key Specifications The BD7757MWX is a 1.5A Flash LED Driver with Input Voltage Range : 2.7V to 5.0V Synchronous rectification step up DC/DC converter that LED current (FLASH): 1.5A (Max) can drive 1LED. The LED current, timer, and UVLO LED current (TORCH): 450mA (Max) threshold can be varied by using UPIC++ (Uni-Port Switching Frequency : 2MHz (Typ) Interface Control ++). Pch FET On Resistance : 150m (Typ) Nch FET On Resistance : 100m (Typ) Features Standby Current at shut down : 0A (Typ) Synchronous rectification step-up DC/DC converter. Operating Temperature Range: -30 to +85 Control of registers via Uni-Port Interface Control ++ (UPIC) Package W(Typ.) x D(Typ.) x H(Max.) Maximum current of 1.5A in Flash mode USON014X3020 3.00mm x 2.00mm x 0.60mm (Low side LED Driver). Lighting Mode Setup Flash Mode1.5A (Max) Torch Mode450mA (Max) Variable LED current Pin Configuration Protection Circuit: Over Current Protection Circuit (OCP) Over Voltage Protection Circuit (OVP) VOUT GND Short Protection Circuit LED Short / Open Protection Circuit Under Voltage Lock Out Circuit (UVLO) Thermal Shut Down Circuit (TSD) Battery Drop Protection Circuit Flash Timer Protection Circuit Applications Flash LED Driver for camera and smart phone DSC, DVC Video Lighting for Digital Video Applications Amusement accessory Figure 2. Pin Configuration Typical Application Circuit Figure 1. Application Circuit Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioactive rays . www.rohm.com TSZ02201-00F1FC200020-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/24 TSZ2211114001 03.DEC.2014 Rev.004DatasheetDatasheet BD7757MWX Pin Description Terminal In/ ESD Diode Pin Name Function No. Out For Power For GND - - 1 AGND - Ground - GND 2 CONTROL1 In UPIC++ control input - GND 3 FL Out Flash/Torch current output Flash ON/OFF terminal. - GND 4 CONTROL2 In (Compulsive lighting, even if control1=Low state. Output flash current set with initial state at control1=Low state.) - - 5 AGND - Ground - GND 6 IN In Power supply - - 7 PGND - Power ground - GND 8 OUT Out DCDC output voltage - - 9 NC - No connection - GND 10 SW In Switching output Flash ON/OFF terminal. 11 CONTROL3 In - GND (Compulsive lighting, even if control1=Low state. Output flash current set with initial state at control1=Low state.) - - 12 NC - No connection - - 13 PGND - Power ground - GND 14 RSET Out The resistor connection terminal of output LED current setting. Block Diagram Figure 3. Block Diagram www.rohm.com TSZ02201-00F1FC200020-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/24 TSZ2211115001 03.DEC.2014 Rev.004