Power and battery management ICs for Low-cost portable electronics
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Power and battery management ICs for Low-cost portable electronics Hafid AMRANI Hubert CORDONNIER
description
Power and battery management ICs for Low-cost portable electronics. Hafid AMRANI Hubert CORDONNIER. PLAN. Introduction Low-cost Process Linear regulators Switched regulators Battery Chargers Example of PM for Mobiles Conclusion. Why power management chips. - PowerPoint PPT Presentation
Transcript of Power and battery management ICs for Low-cost portable electronics
Power and battery management ICs for Low-cost portable electronics
Hafid AMRANIHubert CORDONNIER
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 2
PLAN
•Introduction
•Low-cost Process•Linear regulators•Switched regulators•Battery Chargers•Example of PM for Mobiles
•Conclusion
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 3
Why power management chips
•Power management chips are the interface between batteries and different chips (RF, Base-band and Digital)
•Different elements need special supply voltage and have also different requirements in terms of noise, power supply rejection ratio (PSRR)and quiescent current
•Each power function needs temperature protection, precise reference voltage(trimming)
Mobile phone
PC Private mobile radio
Camera PDA
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 4
Low-cost Process• Based on standard process
– 0.35um - 16kG/mmsq
– 3 or 4 Metal Layers
– 3.3V Low Voltage P/N MOS
– 5.5V Middle Voltage P/N MOS (to be compatible with Li-ion batteries)
– 17V (Drain-Source) High Voltage NMOS (Drain Extended - Gate-Source=5.5V,
to be compatible with low-cost charging devices)
• Options
– 17V High Voltage PMOS and Isolated-NMOS (Drain Extended)
– Poly1-Poly2 capacitors
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 5
Linear regulators
• Low Quiescent Current
• High PSRR
• Low Noise
VOUT
VDD
VIN
F (Hz)
-40 db/dec
Gain (db)
p1 p2
Gdc
zc
pc
ugf0 db
IL1
IL2>IL1
-20 db/dec
-40 db/dec
-20 db/dec
VDD
VIN
VOUT
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 6
Switched regulators• Efficiency
• Pulse width modulation
• Soft control of the switching frequency
)()Re(*
*
DswPGPsrPRdsonPVoutI
VoutI
dI
IdsonRRdsonP
12
22
6
2Re
IesrRsrP
2iVgCfGP
2*
3
** II
tsfVDswP
BAT
Output Voltage Ctrl (X bits)DCenable
Digitalcontrol
Duty cycle generation
Feedback
GRND
VOUT
VBAT
Limitation ref
Frequency control
Reverse-current ref
Bandgap ref
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 7
Battery ChargersSource is AC/DC adapter
Pulsed : If VBAT is lower than 4.2V, the PNP ison for 10ms. If VBAT remains lower than 4.2V the PNP remains on until the voltage of the VBAT reaches 4.2V.At this point the PNP switch off for at least 10ms. Then if VBAT is lower than 4.2V, we switch on the PNP.
Continuous : Current loop followed by voltage loop
Control
VBAT
4.2V
AC/DC
Adapter
+
-
GND
Current feedback
Voltage Feedback
VBAT
0.05
DAC
Control
ACDC ADAPTER
VBATS
AMP-
+MUX
ADC
ContinuousMode
PulsedMode
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 8
Battery ChargersSource is AC/DC adapter
No external sense resistor for end of charge detection No calibration is neededSmall silicon areaNo problem of stability
PulsedCurrent
VoltageCurrent /
PulsedMode
External sense resistor for end of charge detectionCurrent calibrationBig silicon areaStability compensation
VoltageCurrent /
ConstantCurrent
ConstantVoltage
ContinuousMode
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 9
Battery Charger (pulsed mode) 8 Linear Regulators (3 for RF) DC/DC Step DOWN (0.9 to 2.5V /
300mAInternal Switches) Temperature & Voltage Supervision Vibrator & Buzzer Driver Start up Driven by Button SIM Interface Very Low Current Consumption in Sleep Mode Backup Battery management BGA49 5x5mm
Example of PM for Mobiles
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 10
BGA495mmx5mm
0.65 ball pitch1.2mm thickness
One of the smallestpackages for
completePM on the
market
57565554535251
47464544434241
67666564636261
37363534333231
27262524232221
17161514131211
7654321
VRF2 RFGND VBAT4 BUZ-GND VBAT3 BAT-RTC GND2
LED-OUT
VRF1 EN-RF1 BUZ-OUT AVCC EN-ANA-B VPAD VRTC
FLASH-LED CHG EN-RF2 BUZ-IN UP-ON-OFF CREF
SIM-IO
DGND CHG-IN GATE-CHG BB1 ON-OFF DC-ON VBAT5
VBAT1 VSIM RESET-IN TEST EN-VIB V-VIB
DATA-IO
SIM-RST SIM-CLK CLK-IN SIM-SV BATMON RESETB LX
DVCC SIM-EN VCORE ECO-MODE VBAT2 GND1
Small Package
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 11
Conclusion
High performance linear and switched regulators are presented in a standard CMOS process. A new low-cost battery charger with pulsed method is presented and is compared with the linear method. These solutions were successfully integrated in the same chip with other features.The challenge for the future is to find new architectures to be implemented in 0.13um CMOS technology with low cost option of drain extended, for a one chip solution (RF + Base band + power management).
Power Management Product Line
Power and battery management ICs for Low-cost portable electronicsH. AMRANISlide 12
Thank you for your attention
For any further details...
Hafid AMRANIPower Management Design ManagerATMEL Rousset [email protected]+33-442-53-7452
