CN210246596U - Laser diode power supply - Google Patents
Laser diode power supply Download PDFInfo
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- CN210246596U CN210246596U CN201921468633.XU CN201921468633U CN210246596U CN 210246596 U CN210246596 U CN 210246596U CN 201921468633 U CN201921468633 U CN 201921468633U CN 210246596 U CN210246596 U CN 210246596U
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- mode controller
- current mode
- laser diode
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Abstract
The utility model discloses a laser diode power supply, simple structure easily realizes, current mode controller is used for producing high current totem pole output, and the totem pole output of current mode controller drives the half-bridge driver and drives high low side MOS pipe and reach the purpose of adjusting the laser diode current, and current mode controller, half-bridge driver, MOS pipe are easily purchased, and are with low costs; the high-side MOS tube and the low-side MOS tube are alternately conducted, so that alternating-current voltage with the amplitude value of Ui/2 is formed on the side of the energy storage inductor, the average value of the output voltage u can be changed by changing the duty ratio of the switch, the output voltage Uo is also changed, and the adjustment is convenient.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a laser diode power.
[ background of the invention ]
At present, most of laser diodes are driven by integrated ICs, which have high cost, relatively low efficiency, and extremely expensive price of driving ICs with large current output, and the price of a single IC is more than one hundred.
[ Utility model ] content
The utility model overcomes above-mentioned technique is not enough, provides a laser diode power.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a laser diode power supply comprises a current mode controller 1, a half-bridge driver 2 controlled by the current mode controller 1, a controlled high-side MOS tube switch module 41 and a controlled low-side MOS tube switch module 42 which are sequentially connected between a positive voltage output connecting end and a negative voltage output connecting end of a direct current power supply module 3 and driven by the half-bridge driver 2, an energy storage inductor 5 and a polar capacitor 6 are sequentially connected between the positive voltage connecting end and the negative voltage connecting end of the controlled low-side MOS tube switch module 42, and a voltage stabilizing output module 7 used for supplying power to a laser diode is connected to the polar capacitor 6 in parallel.
As described above, the current mode controller 1 is connected to a power supply voltage detection module 81 for detecting whether the dc power supply module 3 is under-voltage so that the current mode controller 1 performs under-voltage protection control, and an output voltage detection module 82 for detecting whether the regulated output module 7 is over-voltage so that the current mode controller 1 performs over-voltage protection control, respectively.
As described above, in the laser diode power supply, a current transformer module 9 for detecting the magnitude of output current is sleeved on the output line of the dc power supply module 3 or the output line of the regulated output module 7, and the current transformer module 9 is connected to the current mode controller 1 through the first PI regulator 10.
In the laser diode power supply as described above, the current mode controller 1 is further connected to a second PI regulator 11, and the second PI regulator 11 is configured to convert an externally input PWM control signal into a PI regulation signal and input the PI regulation signal into the current mode controller 1.
As described above, the controlled high-side MOS switch module 41 includes the N-MOS transistor Q1, the controlled low-side MOS switch module 42 includes the N-MOS transistor Q2, the G pole of the N-MOS transistor Q1 is connected to the HO driving end of the half-bridge driver 2, the G pole of the N-MOS transistor Q2 is connected to the LO driving end of the half-bridge driver 2, and the positive voltage output connection terminal of the dc power supply module 3 is connected to the negative voltage output connection terminal of the dc power supply module 3 sequentially through the N-MOS transistor Q1 and the N-MOS transistor Q2.
Compared with the prior art, the beneficial effects of the utility model are that:
the structure of the scheme is simple and easy to realize, the current mode controller is used for generating high-current totem-pole output, the totem-pole output of the current mode controller drives the half-bridge driver to drive the high-side and low-side MOS tubes to achieve the purpose of adjusting the current of the laser diode, and the current mode controller, the half-bridge driver and the MOS tubes are easy to purchase and low in cost; the high-side MOS tube and the low-side MOS tube are alternately conducted, so that alternating-current voltage with the amplitude value of Ui/2 is formed on the side of the energy storage inductor, the average value of the output voltage u can be changed by changing the duty ratio of the switch, the output voltage Uo is also changed, and the adjustment is convenient.
[ description of the drawings ]
Fig. 1 is one of the structural diagrams of the present case.
Fig. 2 is a second structural diagram of the present invention.
[ detailed description ] embodiments
The features of the present invention and other related features are described in further detail below by way of examples to facilitate understanding by those skilled in the art:
as shown in fig. 1 and fig. 2, a laser diode power supply includes a current mode controller 1, a half-bridge driver 2 controlled by the current mode controller 1, and a controlled high-side MOS transistor switch module 41 and a controlled low-side MOS transistor switch module 42 sequentially connected between a positive voltage output connection end and a negative voltage output connection end of a dc power supply module 3 and driven by the half-bridge driver 2, wherein an energy storage inductor 5 and a polarity capacitor 6 are sequentially connected between the positive voltage connection end and the negative voltage connection end of the controlled low-side MOS transistor switch module 42, and a voltage stabilization output module 7 for supplying power to a laser diode is connected in parallel to the polarity capacitor 6.
As described above, the structure of the laser diode is simple and easy to implement, the current mode controller 1 is used for generating high-current totem-pole output, the totem-pole output of the current mode controller 1 drives the half-bridge driver 2 to drive the high-side and low-side MOS transistors to achieve the purpose of adjusting the current of the laser diode, and the current mode controller, the half-bridge driver and the MOS transistors are easy to purchase and low in cost; the high-side MOS tube and the low-side MOS tube are alternately conducted, so that alternating-current voltage with the amplitude of Ui/2 is formed on the 5 side of the energy storage inductor, the average value of the output voltage u can be changed by changing the duty ratio of the switch, the output voltage UO is also changed, and the regulation is convenient.
As described above, in specific implementation, the current mode controller 1 is respectively connected with the power supply voltage detection module 81 for detecting whether the dc power supply module 3 is under-voltage so that the current mode controller 1 performs under-voltage protection control, and the output voltage detection module 82 for detecting whether the regulated output module 7 is over-voltage so that the current mode controller 1 performs over-voltage protection control.
As described above, in a specific implementation, a current transformer module 9 for detecting the magnitude of the output current is sleeved on the output line of the dc power supply module 3 or the output line of the regulated output module 7, and the current transformer module 9 is connected to the current mode controller 1 through the first PI regulator 10.
As described above, in practical implementation, the current mode controller 1 is further connected to a second PI regulator 11, and the second PI regulator 11 is configured to convert an externally input PWM control signal into a PI regulation signal and input the PI regulation signal to the current mode controller 1.
As described above, in specific implementation, the controlled high-side MOS transistor switch module 41 includes the N-MOS transistor Q1, the controlled low-side MOS transistor switch module 42 includes the N-MOS transistor Q2, the G pole of the N-MOS transistor Q1 is connected to the HO driving end of the half-bridge driver 2, the G pole of the N-MOS transistor Q2 is connected to the LO driving end of the half-bridge driver 2, and the positive voltage output connection terminal of the dc power supply module 3 is connected to the negative voltage output connection terminal of the dc power supply module 3 sequentially through the N-MOS transistor Q1 and the N-MOS transistor Q2.
As mentioned above, the present disclosure is directed to a laser diode power supply, and all technical solutions that are the same as or similar to the present disclosure should be considered as falling within the scope of the present disclosure.
Claims (5)
1. The utility model provides a laser diode power, its characterized in that is including current mode controller (1), receives half-bridge driver (2) of current mode controller (1) control and connect gradually between the positive voltage output link of DC power supply module (3) and receive controlled high side MOS pipe switch module (41) and controlled low side MOS pipe switch module (42) that half-bridge driver (2) driven, connect gradually energy storage inductance (5) and polarity electric capacity (6) between the positive voltage link of controlled low side MOS pipe switch module (42) and negative voltage link, polarity electric capacity (6) are gone up the parallel connection and are used for the steady voltage output module (7) to the laser diode power supply.
2. The laser diode power supply according to claim 1, wherein a power supply voltage detection module (81) for detecting whether the dc power supply module (3) is under-voltage for the current mode controller (1) to perform under-voltage protection control and an output voltage detection module (82) for detecting whether the regulated output module (7) is over-voltage for the current mode controller (1) to perform over-voltage protection control are respectively connected to the current mode controller (1).
3. The laser diode power supply according to claim 1, wherein a current transformer module (9) for detecting the magnitude of the output current is sleeved on the output line of the dc power supply module (3) or the output line of the regulated output module (7), and the current transformer module (9) is connected to the current mode controller (1) through a first PI regulator (10).
4. The laser diode power supply according to claim 1, wherein a second PI regulator (11) is further connected to the current mode controller (1), and the second PI regulator (11) is configured to convert an externally input PWM control signal into a PI regulation signal and input the PI regulation signal into the current mode controller (1).
5. A laser diode power supply according to any one of claims 1-4, characterized in that the controlled high side MOS transistor switch module (41) comprises an N-MOS transistor Q1, the controlled low side MOS transistor switch module (42) comprises an N-MOS transistor Q2, the G pole of the N-MOS transistor Q1 is connected with the HO drive end of the half-bridge driver (2), the G pole of the N-MOS transistor Q2 is connected with the LO drive end of the half-bridge driver (2), and the positive voltage output connection end of the DC power supply module (3) is connected to the negative voltage output connection end of the DC power supply module (3) through the N-MOS transistor Q1 and the N-MOS transistor Q2 in turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921468633.XU CN210246596U (en) | 2019-09-04 | 2019-09-04 | Laser diode power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921468633.XU CN210246596U (en) | 2019-09-04 | 2019-09-04 | Laser diode power supply |
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| Publication Number | Publication Date |
|---|---|
| CN210246596U true CN210246596U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921468633.XU Active CN210246596U (en) | 2019-09-04 | 2019-09-04 | Laser diode power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474523A (en) * | 2019-09-04 | 2019-11-19 | 中山联合光电科技股份有限公司 | A kind of laser diode driver structure |
| WO2023032922A1 (en) * | 2021-08-30 | 2023-03-09 | 株式会社小糸製作所 | Drive circuit for light-emitting element, active sensor, and object identification system |
-
2019
- 2019-09-04 CN CN201921468633.XU patent/CN210246596U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474523A (en) * | 2019-09-04 | 2019-11-19 | 中山联合光电科技股份有限公司 | A kind of laser diode driver structure |
| WO2023032922A1 (en) * | 2021-08-30 | 2023-03-09 | 株式会社小糸製作所 | Drive circuit for light-emitting element, active sensor, and object identification system |
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