pcf50603 NXP Semiconductors, pcf50603 Datasheet - Page 17

• Manufacturer Part Number: pcf50603
• Description: Controller For Power Supply And Battery Management
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8.5.2
A small discrete circuit must be used to control the charge current (see Fig.11).
8.6
The BBC is implemented as a voltage limited current
source with a selectable output resistor. It offers the
following features:
8.7
The SIMI provides the facilities to communicate with SIM.
It offers the following features:
2003 Oct 31
Selectable output resistor to reduce the current at higher
voltages
Four programmable charge currents
Two programmable maximum limiting voltages
The BBC can be enabled in the ACTIVE state; in all
other states the BBC is disabled.
Support for transparent mode. The host controller
controls the communication with the SIM card, including
the activation and deactivation sequences.
Support for sequencer mode. The internal sequencer of
the PCF50603 performs the activation and deactivation
sequences.
Includes a dedicated linear regulator for the SIM card
supply (SIMREG) supporting both 1.8 V and 3.0 V cards
Provides level-shifters for the SIM interfacing signals.
The level-shifters translate the host controller signal
levels (IOVDD) to SIM card signal levels (SIMVCC) and
vice versa.
Controller for power supply
and battery management
(1) The charge switch requires a current gain in the range of 50 to 400 for stable loop operation.
Backup battery charger (BBC)
SIM card interface (SIMI)
E
XTERNAL COMPONENTS
handbook, halfpage
Fig.11 Charge current external circuitry.
CHGCUR
CHGDRV
V CHG
V BAT
0.15
17
BC869
R sense
8.8
The BVM monitors the main battery voltage. It offers the
following features:
The BVM observes permanently the main battery voltage
and generates a LOWBAT interrupt if the battery voltage
drops below the programmed threshold voltage V
(see Fig.12). When a LOWBAT interrupt is generated in
ACTIVE state, the host controller should initiate a
transition to STANDBY state. In case the host controller
does not initiate a transition to the STANDBY state within
eight seconds after the interrupt occurred, the OOC forces
the PCF50603 to the STANDBY state in order to prevent a
too deep discharge of the battery.
In transparent mode the SIMEN input allows the host
controller to have direct control over the SIM card
supply. In sequencer mode the SIMEN input indicates
the presence of a SIM card.
Enhanced ESD protection on all SIM contact pins
The SIMI and SIMREG can be enabled in the ACTIVE
state. In all other states the SIMI and SIMREG are
disabled.
Programmable low battery threshold (V
Hysteresis and selectable debounce filter built in to
prevent fast cycling
The BVM is enabled in all activity states.
(1)
MDB688
Battery voltage monitor (BVM)
Preliminary specification
PCF50603
LOW_BAT
LOW_BAT
)