CN209070488U - A kind of chip of integrated power supply switching circuit - Google Patents

Abstract

The utility model discloses a kind of chips of integrated power supply switching circuit, wherein, VDD power input pin, VOUT power supply output pin, VCC internal control module energization pins, VSS grounding pin and the KEY_DET key detection pin being respectively equipped on the Logic control module that is equipped with including chip carrier, on chip carrier, the power switching module and chip carrier being connect with Logic control module.The utility model has the function of directly provide battery management for battery in circuit, drops to chip stand-by power consumption extremely low, extend equipment and use the time, adaptation is simple, is easily used and saves space-efficient effect.

Description

A kind of chip of integrated power supply switching circuit

Technical field

The utility model relates to intelligent chip field, in particular to a kind of chip of integrated power supply switching circuit.

Background technique

In portable intelligent device, built-in recharge-able battery is a kind of trend.In machine suspend mode, equipment is reduced Stand-by power consumption be of great significance using the time to extending battery life and equipment.Now in portable intelligent equipment on the market The power switch circuit in portion is usually to be separately provided independently of chip, this makes board area bigger.However it is portable now The volume trend of formula smart machine and integrated circuit is to become small, how in a limited space in integrate more functions, make Chip is applied to more kinds of scenes, and here it is the important directions of intelligent chip development.

Utility model content

In view of the above problems, the purpose of this utility model is to provide one kind can directly provide battery for battery in circuit Management function drops to chip stand-by power consumption extremely low, extends equipment and uses the time, adaptation is simple, is easily used and saves sky Between integrated power supply switching circuit chip.

To achieve the above object, the chip of a kind of integrated power supply switching circuit provided by the utility model, wherein including core Piece carrier, the Logic control module being equipped on chip carrier, the power switching module and chip being connect with Logic control module VDD power input pin, VOUT power supply output pin, the VCC internal control module energization pins, VSS being respectively equipped on carrier Grounding pin and KEY_DET key detect pin.VCC internal control module energization pins and VSS grounding pin respectively with logic Control module connection.VDD power input pin, VOUT power supply output pin, VCC internal control module energization pins, VSS ground connection Pin and KEY_DET key detection pin are connect with power switching module respectively.Power switching module include respectively with VDD power supply Input pin and the PMOS tube of VOUT power supply output pin connection, the NPN type three that is connect respectively with PMOS tube and VSS grounding pin Pole pipe, the first diode being connect respectively with KEY_DET key detection pin and PMOS tube and the second diode, one end and PMOS Pipe connection, first resistor that the other end connect with VDD power input pin, one end and the connection of VSS grounding pin, the other end and The second resistance of NPN type triode connection, one end are connect with the second diode, and the other end draws with the power supply of VCC internal control module The second resistance of foot connection.

In some embodiments, VDD power input pin is connected with one end of the source electrode of PMOS tube, first resistor； The grid of the PMOS tube is connected with the anode of the collector of NPN type triode, the other end of first resistor, first diode It connects；The drain electrode of the PMOS tube is connected with VOUT power supply output pin；The transmitting of VSS grounding pin and NPN type triode Pole, second resistance one end be connected；The base stage of the NPN type triode and the other end, the logic control mould of second resistance The output control pin of block is connected；The KEY_DET key detection pin and first diode, the second diode cathode phase Connection；One end of second diode and 3rd resistor, the input of Logic control module detect pin；3rd resistor it is another One end is connect with VCC internal control module energization pins.

It in some embodiments, further include that the programming connecting respectively with Logic control module is provided on chip carrier Data pin, Mbus pin, reset pin and universal input/output interface.

In some embodiments, first resistor and 3rd resistor are pull-up resistor, and second resistance is pull down resistor.

In some embodiments, it is provided with outside chip carrier and connect boosting unit with Logic control module.

In some embodiments, the battery connecting with power switching module is provided with outside chip carrier.

The beneficial effects of the utility model are: portion is provided with Logic control module interconnected in the chip and power supply is opened Close module.Power switching module is connected with the battery of chip exterior, key, boosting unit respectively by multiple pins, can be with Cell voltage is exported into 5V voltage by boosting unit as Logic control module power supply.And Logic control module passes through input detection Pin and output control pin detection key-press status and the opening and closing for continuing to export electric signal control power switching module, from And control whether that system power supply, battery management function can directly be provided for battery in circuit by realizing, and make the standby function of chip Consumption drops to extremely low, extends equipment and uses the time, adaptation is simple, is easily used and saves space.

Detailed description of the invention

Fig. 1 is the structural block diagram of the utility model embodiment 1；

Fig. 2 is the circuit diagram of the utility model embodiment 1.

Specific embodiment

Utility model is described in further detail with reference to the accompanying drawing.

A kind of chip of integrated power supply switching circuit, the logic control mould being equipped with including chip carrier, on chip carrier The VDD power input pin that is respectively equipped on block, the power switching module and chip carrier being connect with Logic control module, VOUT power supply output pin, VCC internal control module energization pins, VSS grounding pin and KEY_DET key detect pin.VCC Internal control module energization pins and VSS grounding pin are connect with Logic control module respectively.VDD power input pin, VOUT Power supply output pin, VCC internal control module energization pins, VSS grounding pin and KEY_DET key detection pin respectively with electricity The connection of source switch module.Power switching module includes connecting respectively with VDD power input pin and VOUT power supply output pin PMOS tube, the NPN type triode being connect respectively with PMOS tube and VSS grounding pin, respectively with KEY_DET key detect pin and The first diode and the second diode, one end and PMOS tube of PMOS tube connection connect, and the other end and VDD power input pin connect The first resistor that connects, one end and VSS grounding pin connect, second resistance that the other end is connect with NPN type triode, one end and the The connection of two diodes, the second resistance that the other end is connect with VCC internal control module energization pins.It further include on chip carrier It is defeated to be provided with the programming data pin connecting respectively with Logic control module, Mbus pin, reset pin and universal input Outgoing interface.First resistor and 3rd resistor are pull-up resistor, and second resistance is pull down resistor.Be provided with outside chip carrier with Logic control module connects boosting unit.The battery connecting with power switching module is provided with outside chip carrier.

Embodiment 1

As shown in Figs. 1-2, power switching module includes PMOS tube Q1, NPN type triode Q2, first diode D1, and second Diode D2, first resistor R1, second resistance R2 and 3rd resistor R3.Source electrode, the first resistor R1 of VDD pin and PMOS tube Q1 One end be connected；The grid of PMOS tube Q1 and the collector of NPN type triode Q2, the other end of first resistor R1, the first pole Pipe D1, the second pole pipe D2 anode be connected；The drain electrode of PMOS tube Q1 is connected with VOUT power supply output pin；VSS grounding lead Foot is connected with one end of the emitter of NPN type triode Q2, second resistance R2；The base stage of NPN type triode Q2 and the second electricity The output control EN_OUT pin of the other end, Logic control module that hinder R2 is connected；KEY_DET key detects pin and first Diode D1, the second diode D2 cathode are connected；One end of second diode D2 and 3rd resistor R3, Logic control module Input detection KEY_IN pin；The other end of 3rd resistor R3 is connect with VCC internal control module energization pins.PMOS tube Q1 exists When grid voltage is equal with source voltage (V (GS)=0), source electrode and drain electrode are disconnected, and drain electrode output is 0；And in grid voltage When less than source voltage 1V or more (V (GS) < -1.0V), source electrode is connected to drain electrode, its output voltage that drains is source electrode at this time Input voltage.NPN type triode Q2, when base stage is low level, the collector and emitter of Q2 is disconnected；Its base stage is high level When, collector is connected to emitter, and emitter is grounded, so collector can also be pulled to low level.

Working principle is, when needing to be switched on, EN_OUT is low level, and G2 point is low level at this time, and Q2 is caused to close It is disconnected.Key pressing moment is being pressed, G1 point becomes low level from high level, causes Q1 to open, at this time VOUT=VDD, chip exterior Boosting unit work exports 5V and powers to the Logic control module of chip interior.KEY_IN pin is connect by R3 with VCC, at this time For high level.Logic control module judges that key is pressed by detecting the high level of KEY_IN pin, and controls EN_OUT and draw Foot persistently exports high level, and G2 is high level at this time, and Q2 is caused to open, and G1 is to continue low level, Q1 is lockked opening state, electricity Pond is continuously system power supply.Key, which resets, to be disconnected, and KEY_IN pin still detects high level.When needing to shut down, key It presses again moment, KEY_IN pin is connected to ground by diode D2, key KEY1, and level is pulled low.Logic control mould Block detects that KEY_IN pin is that low level judges that key is pressed, and EN_OUT pin is persistently exported low level, G2 is at this time Low level causes Q2 to turn off.Key, which resets, to be disconnected, and G1 becomes high level from low level, Q1 is caused to turn off, then VOUT=0, entirely It is least in power-consuming that system enters standby mode.Programming data ICPDA pin is additionally provided on chip carrier, Mbus ICPCLK draws Foot, resets REST pin and universal input exports GPIO interface, corresponding on the Logic control module of chip interior respectively to connect Mouth is connected.

Above-described is only some embodiments of the utility model.For those of ordinary skill in the art, Without departing from the concept of the present invention, various modifications and improvements can be made, these belong to practical new The protection scope of type.

Claims (6)

1. a kind of chip of integrated power supply switching circuit, which is characterized in that is be equipped with including chip carrier, on chip carrier patrols The VDD power input being respectively equipped in volume control module, the power switching module and chip carrier being connect with Logic control module Pin, VOUT power supply output pin, VCC internal control module energization pins, VSS grounding pin and the detection of KEY_DET key are drawn Foot；

The VCC internal control module energization pins and VSS grounding pin are connect with Logic control module respectively;Described VDD power input pin, VOUT power supply output pin, VCC internal control module energization pins, VSS grounding pin and KEY_DET Key detection pin is connect with power switching module respectively；

The power switching module includes the PMOS connecting respectively with VDD power input pin and VOUT power supply output pin Pipe, NPN type triode connect respectively with PMOS tube and VSS grounding pin, respectively with KEY_DET key detection pin and PMOS The first diode and the second diode, one end and PMOS tube of pipe connection connect, and the other end is connect with VDD power input pin First resistor, one end and VSS grounding pin connect, second resistance that the other end is connect with NPN type triode, one end and the two or two Pole pipe connection, the second resistance that the other end is connect with VCC internal control module energization pins.

2. a kind of chip of integrated power supply switching circuit according to claim 1, which is characterized in that the VDD power supply Input pin is connected with one end of the source electrode of PMOS tube, first resistor；The grid of the PMOS tube and NPN type triode Collector, the other end of first resistor, first diode anode be connected；The drain electrode of the PMOS tube and VOUT power supply are defeated Pin is connected out；VSS grounding pin is connected with one end of the emitter of NPN type triode, second resistance；The NPN The base stage of type triode is connected with the output of the other end of second resistance, Logic control module control pin；The KEY_ DET key detection pin is connected with first diode, the second diode cathode；Second diode and 3rd resistor The input of one end, Logic control module detects pin；The other end and VCC internal control module energization pins of 3rd resistor connect It connects.

3. a kind of chip of integrated power supply switching circuit according to claim 2, which is characterized in that further include being carried in chip The programming data pin connecting respectively with Logic control module, Mbus pin, reset pin and general defeated are provided on body Enter output interface.

4. a kind of chip of integrated power supply switching circuit according to claim 1,2 or 3, which is characterized in that described One resistance and 3rd resistor are pull-up resistor, and second resistance is pull down resistor.

5. a kind of chip of integrated power supply switching circuit according to claim 1, which is characterized in that the chip carrier Outside, which is provided with, connect boosting unit with Logic control module.

6. a kind of chip of integrated power supply switching circuit according to claim 1, which is characterized in that the chip carrier Outside is provided with the battery connecting with power switching module.