Battery powered apparatus with the circuit of integrated power management and charger unit
View Patent ↗The present invention discloses a battery powered apparatus with the circuit of integrated power management and charger unit. It mainly comprises a power management and charger unit, a battery powered device, a battery and an adaptor. By integrating the charger unit, the power switch and the programmable current source to the micro-processor, the micro-processor can properly control the power supplied from the adaptor to the battery under the charging mode operation, which further derives a smoother curve of charging current.
1. A battery powered apparatus with the circuit of integrated power management and charger unit, comprising:
a battery, having a first terminal and a second terminal, the first terminal used for receiving power and provide power of the battery and the second terminal used for outputting a detected voltage of the battery (V BAT ), the battery used for providing and receiving power;
an adaptor, having a terminal, used for providing power;
a power management and charger unit, having a first terminal, a second terminal, a third terminal, a fourth terminal, a fifth terminal, a sixth terminal, a seventh terminal, an eighth terminal and a ninth terminal, the first terminal electrically connected to the first terminal of the battery and used for receiving power of the battery, the second terminal electrically connected to the terminal of the adaptor and used for receiving power of the adaptor, the third terminal used for outputting power, the fourth terminal electrically connected to the second terminal of the battery and used for receiving the detected voltage of the battery (V BAT ), the fifth terminal used for outputting a digital signal (ADC_OUT), the sixth terminal used for receiving a first control signal (S 1 <n1:0>), the seventh terminal used for receiving a second control signal (S 2 <n2:0>), the eighth terminal used for receiving a third control signal (I<n3:0>), and the ninth terminal electrically connected to the first terminal of the battery and used for outputting power to the battery;
a battery powered device, having a first terminal, a second terminal, a third terminal, a fourth terminal and a fifth terminal, the first terminal electrically connected to the third terminal of the power management and charger unit and used for receiving the power output from the power management and charger unit, the second terminal electrically connected to the fifth terminal of the power management and charger unit and used for receiving the digital signal (ADC_OUT) output from the power management and charger unit, the third terminal electrically connected to the sixth terminal of the power management and charger unit and used for outputting the first control signal (S 1 <n1:0>), the fourth terminal electrically connected to the seventh terminal of the power management and charger unit and used for outputting the second control signal (S 2 <n2:0>), and the fifth terminal electrically connected to the eighth terminal of the power management and charger unit and used for outputting a third control signal (I<n3:0>); and
wherein the power management and charger unit is used for operation switching of battery mode and charging mode of the battery powered apparatus with the circuit of integrated power management and charger unit according the first control signal (S 1 <n1:0>), the second control signal (S 2 <n2:0>) and the third control signal (I<n3:0>) output from the battery powered device.
2. The battery powered apparatus as claimed in claim 1 , wherein the power management and charger unit and the battery powered device can be realized by using the 0.18 μm, 0.13 μm, 0.09 μm, 0.045 μm, 0.023 μm, 0.011 μm or the advanced process.
3. The battery powered apparatus as claimed in claim 1 , wherein the battery can be selected from flow battery, lead-acid battery, lithium air battery, lithium-ion battery, lithium iron phosphate battery, lithium-sulfur battery, lithium-titanate battery, molten salt battery, nickel-cadmium battery, nickel hydrogen battery, nickel-iron battery, nickel metal hydride battery, nickel-zinc battery, organic radical battery, polymer-based battery, polysulfide bromide battery, rechargeable alkaline battery, sodium-sulfur battery, super iron battery, zinc-bromine flow battery and zinc matrix battery.
4. The battery powered apparatus as claimed in claim 1 , wherein the battery powered device further comprising:
a micro-processor controller, having a first terminal, a second terminal, a third terminal, a fourth terminal, a fifth terminal and a sixth terminal, the first terminal electrically connected to the first terminal of the battery powered device, the second terminal electrically connected to the second terminal of the battery powered device, the third terminal electrically connected to the third terminal of the battery powered device, the fourth terminal electrically connected to the fourth terminal of the battery powered device, the fifth terminal electrically connected to the fifth terminal of the battery powered device, used for outputting the first control signal (S 1 <n1:0>), the second control signal (S 2 <n2:0>) and the third control signal (I<n3:0>); and
a block with other functions, electrically connected to the sixth terminal of the micro-processor controller.
5. The battery powered apparatus as claimed in claim 1 , wherein the power management and charger unit further comprising:
a power switch, having a first terminal, a second terminal, a third terminal and a fourth terminal, the first terminal electrically connected to the first terminal of the power management and charger unit, the second terminal electrically connected to the second terminal of the power management and charger unit, the third terminal used for outputting power, and the fourth terminal electrically connected to the sixth terminal of the power management and charger unit;
a programmable current source, having a first terminal, a second terminal, a third terminal, a fourth terminal, and a fifth terminal, the first terminal electrically connected to the second terminal of the power management and charger unit, the second terminal electrically connected to the ninth terminal of the power management and charger unit, the third terminal used for outputting a detected voltage of the adaptor (V ADT ), the fourth terminal electrically connected to the eighth terminal of the power management and charger unit, and the fifth electrically connected to the seventh terminal of the power management and charger unit;
a regulator, having a first terminal and a second terminal for providing power, the first terminal electrically connected to the third terminal of the power switch, the second terminal electrically connected to the third terminal of the power management and charger unit; and
an analog to digital converter, having a first terminal, a second terminal, a third terminal, and fourth terminal, the first terminal electrically connected to the fourth terminal of the power management and charger unit, the second terminal electrically connected to the third terminal of the programmable current source, the third terminal electrically connected to the fifth terminal of the power management and charger unit, and the fourth terminal electrically connected to the second terminal of the regulator.
6. The battery powered apparatus as claimed in claim 4 , wherein the power switch further comprising:
a comparator, having a first terminal, a second terminal, a third terminal, a fourth terminal, and a ground terminal, the first terminal electrically connected to the first terminal of the power switch, the second terminal electrically connected to the second terminal of the power switch, the third terminal used for receiving a voltage signal (V sys ) and the a fourth terminal used for the outputting a output voltage (Vout) of the comparator;
a power p-type MOS, having a gate terminal, a source terminal and a drain terminal, the source terminal electrically connected to the first terminal of the power switch;
a plurality of pairs of diodes and switches with series connection, having a first terminal and a second terminal, the first terminal of the plurality of pairs of diodes and switches with series connection electrically connected to the first terminal of the power switch;
an external diode, having a first terminal and a second terminal, the first terminal electrically connected to the second terminal of the plurality of pairs of diodes and switches with series connection, used for outputting a voltage signal (V sys ); and
wherein the drain terminal of the power p-type MOS and the second terminal of the external diode are electrically connected to the third terminal of the comparator. The plurality of pairs of diodes and switches with series connection are turned on according to the first control signal (S 1 <n1:0>) of the power switch. The power p-type MOS is controlled by the voltage signal (V sys ) of the external diode.
7. The battery powered apparatus as claimed in claim 5 , wherein the plurality of switches can be replaced and selected from Bipolar Junction Transistor (BJT), Heterojunction Bipolar Transistor (HBT), High Electronic Mobility Transistor (HEMT), Pseudomorphic HEMT (PHEMT), Complementary Metal Oxide Semiconductor Field Effect Transistor (CMOS) and Laterally Diffused Metal Oxide Semiconductor Field Effect Transistor (LDMOS).
8. The battery powered apparatus as claimed in claim 6 , wherein the turned on number of the plurality of pairs of diodes and switches with series connection is determined by the output terminal of first control signal (S 1 <n1:0>) of the micro-processor controller.
9. The battery powered apparatus as claimed in claim 6 , wherein the voltage signal (V sys ) of the external diode is equal to V ADP −0.7 k, where k is the turned on number of the plurality of pairs of diodes and switches with series connection.