AS3685A-DB-DFN

AS3685A/AS3685B Ultra Small High Efficiency 1000mA Charge Pump for White LED Flash The AS3685 is low noise high efficiency capacitive charge pump General Description with 1:1, 1:1.5 and 1:2 operating modes in a small 3x3mm DFN10 or a tiny 2x1.5mm WL-CSP (Wafer Level Chip Scale Package) package. It can drive one flash LED at up to 1000mA current. It supports flash/torch and indicator mode for the flash LED. Additionally the AS3685 limits the flash time automatically to protect the flash LED. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS3685A/AS3685B, Ultra Small High Efficiency 1000mA Charge Pump for White LED Flash are listed below: Figure 1: Added Value Of Using AS3685A/AS3685B Benefits Features High efficiency capactive charge pump with 1:1, 1:1.5 and 1:2 modes therefore maximum input current is exactly controlled. System safety Overtemperature protection Automatic 800ms flash timeout to protect the flash LED Drive LED at high brightness for better pictures Up to 1000mA LED Current Two device variants: AS3685A: Direct control to select three currents Flexible selection of interface type AS3685B: Single pin interface or two pin interface with strobe input 17 different currents can be selected DFN10 (3x3mm) 10 pins + exposed pad Flexible package options WL-CSP (2x1.5mm) 3x4 balls 0.5mm pitch ams Datasheet Page 1 v2-23 2016-Mar-30 Document FeedbackAS3685A/AS3685B Ge n e r a l De s c ri p t io n Applications The AS3685A/AS3685B, Ultra Small High Efficiency 1000mA Charge Pump for White LED Flash is ideal for Flash / Torch for Mobile Phones, Digital Cameras and PDAs. Figure 2: Application Diagram of AS3685A/AS3685B CFLY1 1.0FCFLY2 1.0 F C1+ C1- C2+ C2- VBAT VBAT VCP CBAT CVCP AS3685A 2.2 F 2.2 F AS3685B EN1 ILED DLED EN2 ISET VSS RTXMASK RISET Page 2 ams Datasheet Document Feedback v2-23 2016-Mar-30