AS3710-BQFP

AS3710 Product Brief H i g h C u r r e n t P o w e r M a n a g e m e n t U n i t fo r P o r ta b l e D e v i c e s 1 General Description The AS3710 is a compact System PMU with integrated battery charger and back light driver. The device offers advanced power management functions. All necessary ICs and peripherals in a battery powered mobile device are supplied by the AS3710. It features 3 DCDC buck converters as well as 8 low noise LDOs. The different regulated supply voltages are programmable via the serial control interface. 4MHz operation with 1uH coils are reducing cost and PCB space. The three step-up converter generate voltages for e.g.the backlight, classD amplifier, USB host support or LCD display supply. Both constant voltage (for e.g. OLED supply) as well as constant current (white LED backlight) operations with three current sinks are possible. An internal voltage protection is limiting the output voltage in the case of external component failures. AS3710 contains a linear or switching mode Li-Ion battery charger with constant current and constant voltage. The maximum charging current is 1.5A. An integrated battery switch and an optional external switch are separating the battery during charging or whenever an external power supply is present. With this switch it is also possible to operate with no or deeply discharged batteries. A programmable current limit can be used to control the maximum current used from a USB supply. Additional features are a 30V OV protection and battery temperature supervision. The single supply voltage may vary from 2.7V to 5.5V. HV Backlight Driver 3x step up with external transistor voltage 3 control mode and over-voltage protection programmable current sinks (max. 40mA) e.g. 500mA@5V; 40mA@50V possible external PWM dimming input (DLS, CABC) Battery Charger prog. trickle charging (25-220mA) prog. constant current charging (up to 1500mA) prog. constant voltage charging (3.9V-4.25V) charger time-out and temperature supervision selectable current limitation for USB mode integrated battery switch & ideal diode (linear mode) external battery switch control (switching mode) external 30V OV protection General Supervisor automatic battery monitoring with interrupt generation and selectable warning level automatic temperature monitoring with interrupt generation and selectable warning and shutdown levels Real Time Clock 2 Key Features ultra Power Management selectable Voltage Generation 3 2 DCDC step down regulators DVM (0.6V-3.3V;1x 1.2-1.5A, 2x 0.7-1A) 50uA quiescent current selectable switching frequency (2, 3 or 4MHz) 2A with combined DCDC 2 & 3 analog low noise LDOs, 6 digital LDOs - 2x 1.2-3-3V, 6x 0.9-3.3V; 150-300mA - 30uA quiescent current (low power mode) 1 ultra low power always on LDO 2.5V, 10mA power 4sec supply supervision and 8sec emergency shut-down stand-by sec low power 32kHz oscillator and minute counter, auto wake-up 32kHz 