CN201674399U - Low-ripple power source device - Google Patents
Low-ripple power source device Download PDFInfo
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- CN201674399U CN201674399U CN2010201912825U CN201020191282U CN201674399U CN 201674399 U CN201674399 U CN 201674399U CN 2010201912825 U CN2010201912825 U CN 2010201912825U CN 201020191282 U CN201020191282 U CN 201020191282U CN 201674399 U CN201674399 U CN 201674399U
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Abstract
The utility model discloses a low-ripple power source device, which comprises a direct current input unit, a semi-bridge switch unit, a switch driving circuit, a magnetic core inductor, a current detection unit, an output filter wave capacitor, a first voltage output end and a control chip. An output end of the direct current input unit is connected with the semi-bridge switch unit and the control chip, the semi-bridge switch unit is connected with the control chip through the switch driving circuit, an output end of the semi-bridge switch unit is sequentially connected in series with the magnetic core inductor, the current detection unit and the output filter wave capacitor prior to being connected with the first voltage output end, and an output end of the current detection unit is connected with the control chip. The low-ripple power source device can ensure extremely low ripple of direct current voltage, avoids surge and noise, further avoids electromagnetic interference, ensures steadiness and reliability of power supply, and can meet the high requirements of wireless communication products.
Description
Technical field
The utility model relates to a kind of Switching Power Supply conversion equipment, particularly a kind of supply unit that can effectively suppress power supply ripple.
Background technology
Wireless Telecom Equipment is high to the power-supply device performance demands, can provide the stable direct current supply voltage except requiring power-supply device, also needs it to have good conversion efficiency and extremely low electromagnetic interference.The used power-supply device of Wireless Telecom Equipment is mostly realized by Switching Power Supply at present; wherein BUCK DC/DC transducer is to use step-down type dc switch power converter the most widely; it is low to have input/output voltage; load current is big; voltage transitions efficient advantages of higher; but, Switching Power Supply changes because can producing rapid voltage and current when the switch handover operation; the surge of these formation and noise will be passed to electronic equipment as conducted noise or radiated noise; cause electromagnetic interference problem; and regular meeting produces very big loop current also the time in conducted noise; the ripple voltage that above-mentioned conducted noise produces at the equipment input has a strong impact on the stability of communication device works; the speech quality and the data that reduce communication equipment pass speed; therefore, Xian Shi direct-current switch power supply equipment also fails to satisfy the requirement of Wireless Telecom Equipment.
The utility model content
For addressing the above problem, the utility model provides a kind of low ripple supply unit that can effectively suppress power supply ripple, reliable and stable working power can be provided.
The utility model is that the technical scheme that its problem of solution is adopted is:
A kind of low ripple supply unit, comprise continuous input cell, the half-bridge switch unit, switch driving circuit, the magnetic core inductance, current detecting unit, output filter capacitor, first voltage output end and control chip, the output of described continuous input cell is connected with control chip with the half-bridge switch unit, the half-bridge switch unit is connected with control chip by switch driving circuit, the output of half-bridge switch unit successively with the magnetic core inductance, current detecting unit, output filter capacitor serial connection back links to each other with first voltage output end, and the output of current detecting unit is connected with control chip.
Wherein as preferred embodiment, this supply unit also comprises the charge pump circuit unit, and the input of described charge pump circuit unit is connected with first voltage output end, and the output of charge pump circuit unit links to each other with control chip.
Described half-bridge switch unit comprises high-end NMOS pipe and low side NMOS pipe, one end of high-end NMOS pipe is connected with continuous input cell, the other end of high-end NMOS pipe is connected with an end of low side NMOS pipe, the other end of low side NMOS pipe is connected with ground, the junction of high-end NMOS pipe and low side NMOS pipe and low side NMOS pipe is as the output of half-bridge switch unit, between the output of described half-bridge switch unit and the ground and be connected to fly-wheel diode.
As preferred embodiment, described current detecting unit is a current sense resistor, and described current sense resistor is serially connected with between magnetic core inductance and the output filter capacitor, and the two ends of current sense resistor are provided with the connecting line that links to each other with control chip.
As preferred embodiment, this supply unit comprises second voltage output end and filter unit, linear voltage stabilization unit, and described second voltage output end is connected with first voltage output end with filter unit by the linear voltage stabilization unit successively.
The beneficial effects of the utility model are: input direct current process half-bridge switch of the present utility model forms square wave behind the unit, square wave output is at process magnetic core inductance, output filter capacitor carries out filtering, voltage stabilizing is handled the back and is formed direct current output, utilization is to the feedback signal of the detection signal and the current detecting unit of input voltage size, control chip can be controlled the break-make of the switching tube in the half-bridge switch unit by switch driving circuit, thereby change square wave output and obtain needed direct voltage output, the method of this control can guarantee that direct voltage has extremely low ripple, avoid producing surge and noise, thereby further avoid causing electromagnetic interference problem, guarantee the reliability of power supply, can satisfy the high request of wireless communications products.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is that system of the present utility model forms schematic diagram.
Embodiment
With reference to Fig. 1, a kind of low ripple supply unit provided by the utility model, comprise continuous input cell 1, half-bridge switch unit 2, switch driving circuit 3, magnetic core inductance 4, current detecting unit 5, output filter capacitor 6, first voltage output end 7 and control chip 8, wherein continuous input cell 1 generally comprises input LC filter circuit, be used to stablize the DC input voitage that is connected, the output of continuous input cell 1 is connected with control chip 8 with half-bridge switch unit 2, continuous input cell 1 is used for the work capacity when control chip 8 initializations on the one hand, and provide the detection signal of input voltage size to control chip 8, be used on the other hand providing the switching energy source to half-bridge switch unit 2.
Half-bridge switch unit 2 is connected with control chip 8 by switch driving circuit 3, and the switching tube that half-bridge switch unit 2 is comprised is realized break-make 8 times at control chip.The output of half-bridge switch unit 2 links to each other with first voltage output end 7 with magnetic core inductance 4, current detecting unit 5, output filter capacitor 6 serial connection backs successively, what half-bridge switch unit 2 was exported is square-wave signal, under the filter action of magnetic core inductance 4, output filter capacitor 6, can be converted to direct voltage output, this direct voltage output is passed through first voltage output end 7 to externally fed, wherein, the capacity of output filter capacitor should be tried one's best greatly, guarantees that the direct voltage size of being exported is continual and steady.
The output of current detecting unit 5 is connected with control chip 8, utilize the current detecting unit 5 can be in control chip 8 with the size of current signal feedback, control chip 8 can be controlled the drive signal that it outputs to half-bridge switch unit 2 according to this signal, guarantees that institute's output voltage size is desirable value.When practical application, described current detecting unit 5 is preferably current sense resistor R, current sense resistor R is serially connected with between magnetic core inductance 4 and the output filter capacitor 6, the two ends of current sense resistor R are provided with the connecting line that links to each other with control chip 8, at this moment feed back in the control chip 8 signal directly reflection be the voltage swing at resistance R two ends, can calculate corresponding size of current according to the resistance size control chip 8 of resistance R.
The input direct voltage instability of supply unit, in order to make control chip 8 obtain stable sufficiently high supply power voltage, make its drive signal that outputs to half-bridge switch unit 2 have good driving force, guarantee that half-bridge switch unit 2 has high conversion efficiency, this supply unit also comprises charge pump circuit unit 9, the input of described charge pump circuit unit 9 is connected with first voltage output end 7, the output of charge pump circuit unit 9 links to each other with control chip 8, because the voltage substantially constant that first voltage output end 7 is exported, it is also constant to change the resulting voltage swing in back by charge pump circuit unit 9, transfer characteristic according to charge pump circuit unit 9, the voltage swing that charge pump circuit unit 9 is exported is about the twice of first voltage output end, 7 voltages, this constant voltage can provide sufficiently high supply power voltage to control chip 8, and this moment, control chip 8 transferred the charge pump power supply state to from the input direct voltage power supply state.
As preferred embodiment, described half-bridge switch unit 2 comprises high-end NMOS pipe Q1 and low side NMOS pipe Q2, and metal-oxide-semiconductor is that voltage system drives, and compares with thyristor, and its switching speed is faster.During application, the end of high-end NMOS pipe Q1 is connected with continuous input cell 1, the other end of high-end NMOS pipe Q1 is connected with the end of low side NMOS pipe Q2, the other end of low side NMOS pipe Q2 is connected with ground GND, the junction of high-end NMOS pipe Q1 and low side NMOS pipe Q2 and low side NMOS pipe Q2 is as the output of half-bridge switch unit 2, high-end NMOS pipe Q1 and low side NMOS pipe Q2 open shutoff in turn under the effect of drive signal, the ON time of supposing Q1 is T1, the time that ends is T2, T1 and ratio (T1+T2) are exactly duty ratio D, this moment, the pass of output voltage U o and input voltage Uin was Uo=D*Uin, in order to obtain the littler output voltage U o of spike and ripple, between output and ground GND, need to add sustained diode, this sustained diode is preferably Schottky diode, in addition, the connecting resistance R of output institute is sent to sampled signal in the control chip 8, the voltage and the sawtooth waveforms of the output after the error amplifier of control chip 8 inside amplifies of this sampled signal constitute voltage comparator, export PWM control square wave then to switch driving circuit 3, Push And Release by the control metal-oxide-semiconductor is in time regulated the time of turn-on and turn-off, exports stable voltage.
In addition, as further preferred embodiment, this supply unit also comprises second voltage output end 10 and filter unit 11, linear voltage stabilization unit 12, described second voltage output end 10 is connected with first voltage output end 7 with filter unit 11 by linear voltage stabilization unit 12 successively, utilize the voltage conversion capabilities of linear voltage stabilization unit 12, second voltage output end 7 can be exported another stable little dc voltage value of ratio first voltage output end, 7 voltages.
The utility model is the direct-current switch power supply transducer of a voltage-dropping type, when being applied in the Wireless Telecom Equipment, the input direct voltage scope that is connected is generally between 7V～30V, the output voltage size of first voltage output end 7 is 5V, electric current fan-out capability with 6A, its output ripple are less than 50mV, and the voltage swing that second voltage output end 10 is exported is 3.3V, have the electric current fan-out capability of 2A, its output ripple is less than 30mV.Above-mentioned output can provide reliable working power for Wireless Telecom Equipment, thereby guarantees the stability of equipment work, improves voice call quality, reduces the error rate of transfer of data.
The utility model can also use in fields such as portable instrument, notebook computer or palmtop PC, battery powered digital equipment, industrial equipment distribution to the Wireless Telecom Equipment power supply except being used for, and has wide range of applications.
Claims (5)
1. one kind low ripple supply unit, it is characterized in that: comprise continuous input cell (1), half-bridge switch unit (2), switch driving circuit (3), magnetic core inductance (4), current detecting unit (5), output filter capacitor (6), first voltage output end (7) and control chip (8), the output of described continuous input cell (1) is connected with control chip (8) with half-bridge switch unit (2), half-bridge switch unit (2) is connected with control chip (8) by switch driving circuit (3), the output of half-bridge switch unit (2) successively with magnetic core inductance (4), current detecting unit (5), output filter capacitor (6) serial connection back links to each other with first voltage output end (7), and the output of current detecting unit (5) is connected with control chip (8).
2. a kind of low ripple supply unit according to claim 1, it is characterized in that: this supply unit also comprises charge pump circuit unit (9), the input of described charge pump circuit unit (9) is connected with first voltage output end (7), and the output of charge pump circuit unit (9) links to each other with control chip (8).
3. a kind of low ripple supply unit according to claim 1, it is characterized in that: described half-bridge switch unit (2) comprises high-end NMOS pipe (Q1) and low side NMOS pipe (Q2), one end of high-end NMOS pipe (Q1) is connected with continuous input cell (1), the other end of high-end NMOS pipe (Q1) is connected with an end of low side NMOS pipe (Q2), the other end of low side NMOS pipe (Q2) is connected with ground (GND), the junction of high-end NMOS pipe (Q1) and low side NMOS pipe (Q2) and low side NMOS pipe (Q2) is as the output of half-bridge switch unit (2), the output of described half-bridge switch unit (2) and between (GND) and be connected to fly-wheel diode (D).
4. a kind of low ripple supply unit according to claim 1, it is characterized in that: described current detecting unit (5) is a current sense resistor (R), described current sense resistor (R) is serially connected with between magnetic core inductance (4) and the output filter capacitor (6), and the two ends of current sense resistor (R) are provided with the connecting line that links to each other with control chip (8).
5. a kind of low ripple supply unit according to claim 1, it is characterized in that: this supply unit comprises second voltage output end (10) and filter unit (11), linear voltage stabilization unit (12), and described second voltage output end (10) is connected with first voltage output end (7) with filter unit (11) by linear voltage stabilization unit (12) successively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201912825U CN201674399U (en) | 2010-05-14 | 2010-05-14 | Low-ripple power source device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201912825U CN201674399U (en) | 2010-05-14 | 2010-05-14 | Low-ripple power source device |
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| CN201674399U true CN201674399U (en) | 2010-12-15 |
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| CN2010201912825U Expired - Lifetime CN201674399U (en) | 2010-05-14 | 2010-05-14 | Low-ripple power source device |
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Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832807A (en) * | 2012-08-31 | 2012-12-19 | 电子科技大学 | Current control circuit for charge pump |
| CN103533719A (en) * | 2013-10-29 | 2014-01-22 | 上海晶丰明源半导体有限公司 | Triode-based light-emitting diode (LED) current ripple elimination driving circuit |
| CN103959189A (en) * | 2011-10-26 | 2014-07-30 | 射频小型装置公司 | Inductance based parallel amplifier phase compensation |
| US9207692B2 (en) | 2012-10-18 | 2015-12-08 | Rf Micro Devices, Inc. | Transitioning from envelope tracking to average power tracking |
| US9225231B2 (en) | 2012-09-14 | 2015-12-29 | Rf Micro Devices, Inc. | Open loop ripple cancellation circuit in a DC-DC converter |
| US9246460B2 (en) | 2011-05-05 | 2016-01-26 | Rf Micro Devices, Inc. | Power management architecture for modulated and constant supply operation |
| US9247496B2 (en) | 2011-05-05 | 2016-01-26 | Rf Micro Devices, Inc. | Power loop control based envelope tracking |
| US9250643B2 (en) | 2011-11-30 | 2016-02-02 | Rf Micro Devices, Inc. | Using a switching signal delay to reduce noise from a switching power supply |
| US9256234B2 (en) | 2011-12-01 | 2016-02-09 | Rf Micro Devices, Inc. | Voltage offset loop for a switching controller |
| US9263996B2 (en) | 2011-07-20 | 2016-02-16 | Rf Micro Devices, Inc. | Quasi iso-gain supply voltage function for envelope tracking systems |
| CN105379092A (en) * | 2013-07-11 | 2016-03-02 | 高通股份有限公司 | Switching power supply with noise control |
| US9280163B2 (en) | 2011-12-01 | 2016-03-08 | Rf Micro Devices, Inc. | Average power tracking controller |
| US9294041B2 (en) | 2011-10-26 | 2016-03-22 | Rf Micro Devices, Inc. | Average frequency control of switcher for envelope tracking |
| US9298198B2 (en) | 2011-12-28 | 2016-03-29 | Rf Micro Devices, Inc. | Noise reduction for envelope tracking |
| US9300252B2 (en) | 2013-01-24 | 2016-03-29 | Rf Micro Devices, Inc. | Communications based adjustments of a parallel amplifier power supply |
| US9374005B2 (en) | 2013-08-13 | 2016-06-21 | Rf Micro Devices, Inc. | Expanded range DC-DC converter |
| US9377797B2 (en) | 2011-12-01 | 2016-06-28 | Rf Micro Devices, Inc. | Multiple mode RF power converter |
| US9379667B2 (en) | 2011-05-05 | 2016-06-28 | Rf Micro Devices, Inc. | Multiple power supply input parallel amplifier based envelope tracking |
| US9401678B2 (en) | 2010-04-19 | 2016-07-26 | Rf Micro Devices, Inc. | Output impedance compensation of a pseudo-envelope follower power management system |
| US9431974B2 (en) | 2010-04-19 | 2016-08-30 | Qorvo Us, Inc. | Pseudo-envelope following feedback delay compensation |
| US9479118B2 (en) | 2013-04-16 | 2016-10-25 | Rf Micro Devices, Inc. | Dual instantaneous envelope tracking |
| US9484797B2 (en) | 2011-10-26 | 2016-11-01 | Qorvo Us, Inc. | RF switching converter with ripple correction |
| US9515621B2 (en) | 2011-11-30 | 2016-12-06 | Qorvo Us, Inc. | Multimode RF amplifier system |
| US9614476B2 (en) | 2014-07-01 | 2017-04-04 | Qorvo Us, Inc. | Group delay calibration of RF envelope tracking |
| US9621113B2 (en) | 2010-04-19 | 2017-04-11 | Qorvo Us, Inc. | Pseudo-envelope following power management system |
| US9627975B2 (en) | 2012-11-16 | 2017-04-18 | Qorvo Us, Inc. | Modulated power supply system and method with automatic transition between buck and boost modes |
| US9813036B2 (en) | 2011-12-16 | 2017-11-07 | Qorvo Us, Inc. | Dynamic loadline power amplifier with baseband linearization |
| US9843294B2 (en) | 2015-07-01 | 2017-12-12 | Qorvo Us, Inc. | Dual-mode envelope tracking power converter circuitry |
| US9912297B2 (en) | 2015-07-01 | 2018-03-06 | Qorvo Us, Inc. | Envelope tracking power converter circuitry |
| US9954436B2 (en) | 2010-09-29 | 2018-04-24 | Qorvo Us, Inc. | Single μC-buckboost converter with multiple regulated supply outputs |
| US9973147B2 (en) | 2016-05-10 | 2018-05-15 | Qorvo Us, Inc. | Envelope tracking power management circuit |
| CN109067151A (en) * | 2018-09-26 | 2018-12-21 | 东莞华贝电子科技有限公司 | A kind of driving voltage dynamic regulating circuit and driving voltage dynamic adjusting method |
| US10476437B2 (en) | 2018-03-15 | 2019-11-12 | Qorvo Us, Inc. | Multimode voltage tracker circuit |
-
2010
- 2010-05-14 CN CN2010201912825U patent/CN201674399U/en not_active Expired - Lifetime
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| US9401678B2 (en) | 2010-04-19 | 2016-07-26 | Rf Micro Devices, Inc. | Output impedance compensation of a pseudo-envelope follower power management system |
| US9431974B2 (en) | 2010-04-19 | 2016-08-30 | Qorvo Us, Inc. | Pseudo-envelope following feedback delay compensation |
| US9954436B2 (en) | 2010-09-29 | 2018-04-24 | Qorvo Us, Inc. | Single μC-buckboost converter with multiple regulated supply outputs |
| US9247496B2 (en) | 2011-05-05 | 2016-01-26 | Rf Micro Devices, Inc. | Power loop control based envelope tracking |
| US9379667B2 (en) | 2011-05-05 | 2016-06-28 | Rf Micro Devices, Inc. | Multiple power supply input parallel amplifier based envelope tracking |
| US9246460B2 (en) | 2011-05-05 | 2016-01-26 | Rf Micro Devices, Inc. | Power management architecture for modulated and constant supply operation |
| US9263996B2 (en) | 2011-07-20 | 2016-02-16 | Rf Micro Devices, Inc. | Quasi iso-gain supply voltage function for envelope tracking systems |
| US9484797B2 (en) | 2011-10-26 | 2016-11-01 | Qorvo Us, Inc. | RF switching converter with ripple correction |
| US9294041B2 (en) | 2011-10-26 | 2016-03-22 | Rf Micro Devices, Inc. | Average frequency control of switcher for envelope tracking |
| CN103959189B (en) * | 2011-10-26 | 2015-12-23 | 射频小型装置公司 | Based on the parallel amplifier phase compensation of inductance |
| CN103959189A (en) * | 2011-10-26 | 2014-07-30 | 射频小型装置公司 | Inductance based parallel amplifier phase compensation |
| US9250643B2 (en) | 2011-11-30 | 2016-02-02 | Rf Micro Devices, Inc. | Using a switching signal delay to reduce noise from a switching power supply |
| US9515621B2 (en) | 2011-11-30 | 2016-12-06 | Qorvo Us, Inc. | Multimode RF amplifier system |
| US9377797B2 (en) | 2011-12-01 | 2016-06-28 | Rf Micro Devices, Inc. | Multiple mode RF power converter |
| US9280163B2 (en) | 2011-12-01 | 2016-03-08 | Rf Micro Devices, Inc. | Average power tracking controller |
| US9256234B2 (en) | 2011-12-01 | 2016-02-09 | Rf Micro Devices, Inc. | Voltage offset loop for a switching controller |
| US9813036B2 (en) | 2011-12-16 | 2017-11-07 | Qorvo Us, Inc. | Dynamic loadline power amplifier with baseband linearization |
| US9298198B2 (en) | 2011-12-28 | 2016-03-29 | Rf Micro Devices, Inc. | Noise reduction for envelope tracking |
| CN102832807A (en) * | 2012-08-31 | 2012-12-19 | 电子科技大学 | Current control circuit for charge pump |
| CN102832807B (en) * | 2012-08-31 | 2014-07-02 | 电子科技大学 | Current control circuit for charge pump |
| US9225231B2 (en) | 2012-09-14 | 2015-12-29 | Rf Micro Devices, Inc. | Open loop ripple cancellation circuit in a DC-DC converter |
| US9207692B2 (en) | 2012-10-18 | 2015-12-08 | Rf Micro Devices, Inc. | Transitioning from envelope tracking to average power tracking |
| US9627975B2 (en) | 2012-11-16 | 2017-04-18 | Qorvo Us, Inc. | Modulated power supply system and method with automatic transition between buck and boost modes |
| US9929696B2 (en) | 2013-01-24 | 2018-03-27 | Qorvo Us, Inc. | Communications based adjustments of an offset capacitive voltage |
| US9300252B2 (en) | 2013-01-24 | 2016-03-29 | Rf Micro Devices, Inc. | Communications based adjustments of a parallel amplifier power supply |
| US9479118B2 (en) | 2013-04-16 | 2016-10-25 | Rf Micro Devices, Inc. | Dual instantaneous envelope tracking |
| CN105379092B (en) * | 2013-07-11 | 2018-01-16 | 高通股份有限公司 | Switching Power Supply with Noise measarement |
| CN105379092A (en) * | 2013-07-11 | 2016-03-02 | 高通股份有限公司 | Switching power supply with noise control |
| US9374005B2 (en) | 2013-08-13 | 2016-06-21 | Rf Micro Devices, Inc. | Expanded range DC-DC converter |
| CN103533719A (en) * | 2013-10-29 | 2014-01-22 | 上海晶丰明源半导体有限公司 | Triode-based light-emitting diode (LED) current ripple elimination driving circuit |
| US9614476B2 (en) | 2014-07-01 | 2017-04-04 | Qorvo Us, Inc. | Group delay calibration of RF envelope tracking |
| US9843294B2 (en) | 2015-07-01 | 2017-12-12 | Qorvo Us, Inc. | Dual-mode envelope tracking power converter circuitry |
| US9912297B2 (en) | 2015-07-01 | 2018-03-06 | Qorvo Us, Inc. | Envelope tracking power converter circuitry |
| US9941844B2 (en) | 2015-07-01 | 2018-04-10 | Qorvo Us, Inc. | Dual-mode envelope tracking power converter circuitry |
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| US9973147B2 (en) | 2016-05-10 | 2018-05-15 | Qorvo Us, Inc. | Envelope tracking power management circuit |
| US10476437B2 (en) | 2018-03-15 | 2019-11-12 | Qorvo Us, Inc. | Multimode voltage tracker circuit |
| CN109067151A (en) * | 2018-09-26 | 2018-12-21 | 东莞华贝电子科技有限公司 | A kind of driving voltage dynamic regulating circuit and driving voltage dynamic adjusting method |
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Address after: 519085, No. five, No. eight, Harbour Road, Zhuhai, Guangdong Patentee after: DINGLI CORP., LTD. Address before: 519085, No. five, No. eight, Harbour Road, Zhuhai, Guangdong Patentee before: Dingli Communications Corp., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20101215 |
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