Controller for Power Supply and Battery Management
s A fully integrated DC/DC converter (hereafter DCUD) with programmable output
voltages, mask programmable reset voltage and operation mode. This converter
can be conﬁgured as a step-up with currents up to 250mA and as step down
converter, with currents up to 500mA. This converter is typically used as back-light
/ White LED supply in step-up mode. In step down conﬁguration this converter
generates low supply voltages or is used as pre-regulation stage for linear
regulators to improve the power efﬁciency.
s A DC/DC step down controller (hereafter DCDE) with build-in drivers for external
power fets for high current outputs, programmable output voltage and mask
programmable reset voltage and operation mode. This converter is typically used
to generate high current supply voltages for memory systems or accessories.
s One 150mA low-dropout (LDO) voltage regulator (IOVDD) with programmable
output voltage and mask programmable reset voltage. This regulator also supplies
all pins of PCF50606 interfacing to the host controller.
s Three 150mA LDO voltage regulators (D1VDD till D3VDD) with programmable
output voltage. Its reset value is mask programmable.
s One 150 mA LDO voltage regulator (LPVDD) with programmable output voltage
and mask programmable reset voltage and operation mode. In its ECO mode (low
power operation mode), it can be kept activated permanently, independent of the
activation state of the PCF50606.
s Dynamic Voltage Management is supported on the DCD step-down converter.
This allows to switch between pre-deﬁned (through the I2C interface) output
voltage settings under control of the PWREN inputs.
s Battery voltage monitor (hereafter BVM) to detect a too low main battery voltage
with programmable threshold levels.
s Main battery charger (hereafter MBC) to charge Li-ion/Li-polymer batteries and 3
cell NiMH/NiCd batteries.
x Constant Current / Constant Voltage charging method for Li-ion/Li-pol
batteries with external adjusted fast charge current and programmable
maximum battery voltage
x supports fully autonomous charging of Li-ion/Li-polymer batteries without
interaction of the host controller or a fully host controlled charging sequence.
x Supports the use of controlled charger plug through build in switch mode.
x Includes extensive safety features, including charger over voltage and over
current detection, battery voltage and temperature monitoring and a dedicated
watchdog / charge timer circuit.
s Includes a backup battery charger (hereafter BBC). A rechargeable backup
battery can be charged from the main battery. For charging, a programmable
constant voltage mode is supported.
s 10 bits analog to digital converter with analog input multiplexer. The built-in
voltage divider on the BATVOLT input allows direct connection of the battery
voltage to this input
x The built-in voltage divider and subtractor circuit on the BATVOLT / ADCIN1
inputs allows direct connection of the battery voltage to these pin, without
external voltage dividers and without resolution losses.
x The accessory detection comparator connected to the ADCIN2 input issues an
interrupt when an accessory is connected.
Rev. 2.2 — 9 April 2004
© Philips Electronics N.V. 2003. All rights reserved.
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