描述 Description

The TPS65530A is a fully integrated 8-channel switching dc/dc converter, and seven channels have integrated power FET. CH2/4 are configured for H bridge for buck-boost topology and single inductor supports. These channels achieve higher efficiency in spite of input/output voltage conditions. CH7 has a brightness control and drives white LED by constant current. Also, CH7 supports overvoltage protection (OVP) for open load. CH1/2/3 have a power ON/OFF sequence suitable for a digital still camera (DSC) system. CH5/6 have a power ON/OFF sequence, depending on the CCD. Power ON/OFF for CCD block (CH5/6) is selectable by the input voltage level at the SEQ56 pin. CH4 and CH7 have individual ON/OFF sequences. The TPS65530A high switching frequency is achieved by an integrated power MOSFET switch. It reduces external parts dynamically. Shutdown current consumption is less than 1 μA as a typical value.

特性 Features

? 8-Channel DC/DC Converter and Low Dropout (LDO)
? Integrated Power MOSFET Switch Except CH8
? Boost (CH5/7)
? Buck (CH1/3)
? Buck-Boost (CH2/4)
? Invert (CH6)

? Low-Power Suspend Mode (Sleep Mode)
? Power ON/OFF Sequence (CH1/2/3 and CH5/6)
? LED-Back Light Brightness Control (CH7)
? Fixed Switching Frequency (CH1–4: 1.5 MHz, CH5–8: 750 kHz)
? Fixed Max Duty Cycle Internally
? Soft Start
? Undervoltage Lockout (UVLO)
? Protection
? Thermal Shutdown (TSD)
? Overvoltage Protection (OVP)
? Overcurrent Protection (OCP) Except CH8

? Supply Voltage Range: 1.5 V to 5.5 V
? Operating Temperature Range: –25°C to 85°C
? 6 × 6 mm, 0.4-mm Pitch, 48-Pin QFN Package
? APPLICATIONS
? Digital Still Cameras (DSCs)
? Portable Electronics Equipment

PowerPAD is a trademark of Texas Instruments.