发明名称 |
CHARGE CONTROL CIRCUIT USING BATTERY VOLTAGE TRACKING, AND A DEVICE HAVING THE SAME |
摘要 |
A charge control circuit includes: a charge current control circuit configured to receive an input voltage at a first node, output a sensing current to a second node, and turn on a power transistor; a comparator configured to compare a voltage level of the second node with a voltage level of a third node, wherein the third node receives a charging current from the power transistor; a current mirror configured to generate a mirror current corresponding to the sensing current; and an amplifier configured to receive a first feedback voltage based on the mirror current, and amplify a difference between the first feedback voltage and a reference voltage to generate a switch control signal, wherein in response to the switch control signal and a plurality of control signals, the charge current control circuit is configured to decrease the sensing current and turn on the power transistor. |
申请公布号 |
US2017040818(A1) |
申请公布日期 |
2017.02.09 |
申请号 |
US201615096687 |
申请日期 |
2016.04.12 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KONG TAE HWANG;LEE SUN KYU;LEE SUNG YONG;KIM DAE YONG;KIM SANG HO |
分类号 |
H02J7/00 |
主分类号 |
H02J7/00 |
代理机构 |
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代理人 |
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主权项 |
1. A charge control circuit, comprising:
a charge current control circuit configured to receive an input voltage at a first node, output a sensing current to a second node, and turn on a power transistor; a comparator configured to compare a voltage level of the second node with a voltage level of a third node, wherein the third node receives a charging current from the power transistor; a current mirror configured to generate a mirror current corresponding to the sensing current; and an amplifier configured to receive a first feedback voltage based on the mirror current, and amplify a difference between the first feedback voltage and a reference voltage to generate a switch control signal, wherein in response to the switch control signal and a plurality of control signals, the charge current control circuit is configured to decrease the sensing current and turn on the power transistor. |
地址 |
SUWON-SI KR |