SMB112

SMB112 Five-Channel Digitally Programmable White-LED and TFT/LCD Power Manager FEATURES & APPLICATIONS • Digital programming of all major parameters via I C 2 Preliminary Information INTRODUCTION The SMB112 is a highly integrated and flexible five-channel power manager designed for powering TFT/LCD display panels and for driving low- and high-power white-LEDs. The built-in digital programmability allows system designers to custom tailor the device to suit almost any multi-channel power supply application from digital camcorders to mobile phones. The SMB112 integrates all the essential blocks required to implement a complete five-channel power subsystem for TFT/LCD panels including a synchronous step-down “buck” controller, two step-up “boost” controllers, one inverting “buckboost” controller and one fixed output +3.3V LDO. Additionally sophisticated power control/monitoring functions required by complex systems are built-in. These include digitally programmable output voltage set point, individual dimming, power-up/down sequencing, enable/disable, margining and UV/OV/input/output monitoring on all channels. The integration of features and built-in flexibility of the SMB112 allows the system designer to create a “platform solution” that can be easily modified via software without major hardware changes. Combined with the re-programmability of the SMB112 this facilitates rapid design cycles and proliferation from a base design to future generations of product. The SMB112 is suited to battery-powered applications with an input range of +2.7V to +6.0V. Output voltages are extremely accurate (