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A system and method for charging a battery. In one embodiment, the system includes a charging circuit that charges the battery with a constant current during a first phase and charges the battery with a constant voltage during a second phase. The system also includes a control circuit for minimizing

A system and method for charging a battery. In one embodiment, the system includes a charging circuit that charges the battery with a constant current during a first phase and charges the battery with a constant voltage during a second phase. The system also includes a control circuit for minimizing glitches when the charging transitions from the first phase to the second phase. According to the system and method disclosed herein, a battery may be charged in a controlled and reliable manner.

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What is claimed is: 1. A system for charging a battery, the system comprising: a charging circuit configured to charge the battery with a constant current during a first phase and to charge the battery with a constant voltage during a second phase; and a control circuit coupled to the charging circ

What is claimed is: 1. A system for charging a battery, the system comprising: a charging circuit configured to charge the battery with a constant current during a first phase and to charge the battery with a constant voltage during a second phase; and a control circuit coupled to the charging circuit, the control circuit configured to suppress glitches when the charging circuit transitions from the first phase to the second phase, the control circuit comprising a one-shot generator and a flip-flop latch coupled to the one-shot generator. 2. A system for charging a battery, the system comprising: a charging circuit configured to charge the battery with a constant current during a first phase and to charge the battery with a constant voltage during a second phase; and a control circuit coupled to the charging circuit, the control circuit configured to suppress glitches when the charging circuit transitions from the first phase to the second phase, wherein the charging circuit further comprises: a transistor configured to provide a charge current to the battery; and a voltage storage circuit to store a voltage at a gate of the transistor. 3. A system for charging a battery, the system comprising: a charging circuit configured to charge the battery with a constant current during a first phase and to charge the battery with a constant voltage during a second phase; and a control circuit coupled to the charging circuit, the control circuit configured to suppress glitches when the charging circuit transitions from the first phase to the second phase, wherein the charging circuit further comprises: a transistor configured to couple between a power source and the battery; an amplifier coupled to a gate of the transistor; and a current-to-voltage converter coupled between the transistor and the battery. 4. The system of claim 3 wherein the charging circuit further comprises: a first multiplexer coupled between an output of the converter and a first input of the amplifier; and a second multiplexer coupled to a second input of the amplifier. 5. The system of claim 3 wherein the charging circuit further comprises a voltage divider coupled between the current-to-voltage converter, the battery, and the first multiplexer. 6. A system for charging a battery, the system comprising: a charging circuit to charge the battery with a constant current during a first phase and to charge the battery with a constant voltage during a second phase; and a control circuit coupled to the charging circuit, the control circuit for minimizing glitches when the charging circuit transitions from the first phase to the second phase, and wherein the control circuit comprises: a one-shot generator; and a flip-flop latch coupled to the one-shot generator. 7. The system of claim 6 wherein the charging circuit further comprises: a transistor to provide a charge current to the battery; and a voltage storage circuit to store a voltage at a gate of the transistor. 8. The system of claim 6 wherein the charging circuit comprises: a transistor configured to couple between a power source and the battery; an amplifier coupled to a gate of the transistor; and a current-to-voltage converter coupled between the transistor and the battery. 9. The system of claim 8 wherein the charging circuit further comprises: a first multiplexer coupled between an output of the current-to-voltage converter and a first input of the amplifier; and a second multiplexer coupled to a second input of the amplifier. 10. The system of claim 8 wherein the charging circuit further comprises a voltage divider coupled between the converter and the battery. 11. A method for charging a battery, the method comprising: charging the battery with a constant current during a first phase using a charging circuit; charging the battery with a constant voltage during a second phase using the charging circuit; and suppressing glitches using a control circuit when transitioning from the first phase to the second phase, the control circuit coupled to the charging circuit and including a one-shot generator and a flip-flop latch coupled to the one-shot generator. 12. The method of claim 11, wherein suppressing glitches comprises maintaining a voltage level at a gate of a transistor coupled between a power supply and the battery during a transition phase. 13. The method of claim 12, wherein the transition phase comprises a period of time sufficient to allow the constant voltage to stabilize. 14. The method of claim 11, wherein suppressing glitches comprises minimizing over-voltage conditions or current spikes applied to the battery. 15. The method of claim 11, wherein suppressing glitches comprises: receiving a mode selection signal at the control circuit, the mode selection signal indicating a transition from the first phase to the second phase; generating a pulse using the one-shot generator; and applying the pulse to a gate of a transistor coupled between a power supply and the battery. 16. The method of claim 15, further comprising: inverting the pulse to clock a voltage level into the flip-flop latch; and selecting between inputs of at least one multiplexer circuit coupled to the gate based on an inverted output of the flip-flop latch. 17. The system of claim 1, wherein the charging circuit comprises: a transistor including a first terminal coupled to a power supply, a second terminal, and a gate terminal; a sense resistor coupled between the second terminal and the battery; a first amplifier configured to measure a differential voltage across the sense resistor; a first multiplexer including a first multiplexer input coupled to an output of the first amplifier, a second multiplexer input, and a first selection input coupled to the control circuit; a second multiplexer; and a second amplifier including a first amplifier input coupled to a first multiplexer output of the first multiplexer and a second amplifier input coupled to a second multiplexer output of the second multiplexer, the second amplifier including an output coupled to the gate terminal of the transistor. 18. The system of claim 17, further comprising: a voltage divider circuit coupled between the second terminal of the transistor and an electrical ground, the voltage divider circuit comprising: a first resistor coupled between the sense resistor and a node; and a second resistor coupled between the node and the electrical ground; wherein the node is coupled to the second multiplexer input of the first multiplexer.