AT1397A

www.DataSheet4U.com AT1397A/B Preliminary Product Information 6-Channel DC-DC Converter for DSC Features 95% Efficient possible DC/DC Converter Bulit-in LED Driver and Open LED Overvoltage Protection Transformerless Inverting Controller for CCD Bias 2 Channel Built-in MOSFET Current- Mode PWM and 4 Channel Extra PWM Controllers (CH-3 Synchronous Output) Up to 1MHz Operating Frequency Shutdown Current <1uA Built-in Soft-Start Function Built-in Short-Circuit Protection Function QFN48 Package General Description The AT1397A/B provide a complete power supply solution for digital cameras. They improve performance, component count, and size compared to other multi-channel controllers in 1-cell Li-Ion designs. On-chip MOSFETs provide up to 92~95% efficiency for critical power supplies, while additional channels operate with external FETs for optimum design flexibility. All channels DC/DC operate at one fixed frequency settable from 100KHz to 1MHz to optimize size, cost, and efficiency. Applications DSC Power Supply Pin Assignment AT1397AN 36 37 38 39 40 41 42 43 44 45 46 47 48 1 2 3 4 5 6 7 8 9 10 11 12 35 34 33 32 31 30 29 28 27 26 25 24 23 22 AT1397BN CH1 Synchronous Rectified Current Mode Step-Down On-Chip MOSFET CH2 Synchronous Rectified Current Mode Step-Down On-Chip MOSFET CH3 Synchronous Rectified Voltage Mode Step-Down CH4 Seletable Voltage Mode Step-Up/Down/Inverting CH5 Voltage Mode PWM Step-Up CH6 Voltage Mode Step-Up CH1 Synchronous Rectified Curre...