2 layers100 × 155 mm
2 layers100 × 90 mm
Current dr amp
werediver/current-dr-amp7A current drive headphone amplifier
- Size
- 100 × 90 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 83
- Nets
- 65
- Pads
- 229
- Tracks, vias
- 442, 128
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Aug 2020
- Updated
- 26 Feb 2021
Overview
Current dr amp is an open-source printed circuit board by werediver, from the werediver/current-dr-amp repository on GitHub. It is a 2-layer board of 100 × 90 mm with 83 parts on 65 nets, routed with 442 tracks and 128 vias.
It is built around the OPA1611AID, OPA1641AID and BCM62B, with the BC807, BC817 and BCM61B among its other parts. Its parts include 38 capacitors, 24 resistors, 10 transistors, 6 ICs and 5 connectors. It belongs with the audio and music boards of this library.
Main components
6
OPA1611AID
SOIC-8-18V~-2.25V、2.25V~18V -40℃~+85℃ 0.000015% 1-Channel 3.6mA ESD protection SOIC-8 Audio Amplifiers ROHSTexas InstrumentsAudio AmplifiersOPA1641AID
SOIC-8-40℃~+85℃ 0.00005% 1-Channel 1.8mA 2.25V~18V Overvoltage protection SOIC-8 Audio Amplifiers ROHSTexas InstrumentsAudio Amplifiers
BCM62B
SOT-143-65℃~+150℃ 100MHz 100mA 15nA 2 PNP 390mW 400mV 450 45V 5V PNP SOT-143 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
BC807
SOT-23-65℃~+150℃ 1 PNP 100 100nA 345mW 45V 500mA 5V 700mV 80MHz PNP SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)BC817
SOT-231 NPN 100nA 150MHz 300mW 40 45V 500mA 5V 700mV NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)BCM61B
SOT-143-65℃~+150℃ 100mA 15nA 2 NPN 200mV 250MHz 290 390mW 45V 6V NPN SOT-143 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
README
README.mdCURRENT DR.
This is a "current drive" or VCCS class A headphone amplifier. Some advocacy of current drive (as well as a whole book on the topic) can be found at current-drive.info.
The first prototype is briefly described on Prototype page.
Schematic
The current version of the schematic is showed below.
Two such channels with a dedicated linear PSU are going to be fit into an extruded aluminum enclosure with internal dimensions of 96x155x50 mm.
Parts
83| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 0.1u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C10, C14, C15, C16, C17, C20, C21, C24, C25, C29, C33, C34, C35, C36 +2 |
| 12 | 1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R3, R4, R5, R7, R8, R13, R15, R16, R17, R19, R20 |
| 10 | 10u | Capacitor_Tantalum_SMD:CP_EIA-3216-10_Kemet-I_Pad1.58x1.35mm_HandSolder | C3, C7, C11, C18, C19, C22, C26, C30, C37, C38 |
| 4 | 15 2W | Resistor_SMD:R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R11, R12, R23, R24 |
| 4 | 22u | Capacitor_Tantalum_SMD:CP_EIA-3216-10_Kemet-I_Pad1.58x1.35mm_HandSolder | C4, C8, C23, C27 |
| 4 | 56p | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C12, C13, C31, C32 |
| 4 | 680 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6, R10, R18, R22 |
| 4 | BCM62B | Package_TO_SOT_SMD:SOT-143_Handsoldering | Q1, Q3, Q6, Q8 |
| 4 | OPA1611 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2, U3, U5, U6 |
| 2 | 10k | Potentiometer_SMD:Potentiometer_Bourns_3224W_Vertical | R2, R14 |
| 2 | 1k | Potentiometer_SMD:Potentiometer_Bourns_3224W_Vertical | R9, R21 |
| 2 | 2.2u | Capacitor_THT:C_Rect_L18.0mm_W11.0mm_P15.00mm_FKS3_FKP3 | C9, C28 |
| 2 | ATT | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J4, J5 |
| 2 | BC807 | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q4, Q9 |
| 2 | BC817 | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q5, Q10 |
| 2 | BCM61B | Package_TO_SOT_SMD:SOT-143_Handsoldering | Q2, Q7 |
| 2 | OPA1641 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1, U4 |
| 1 | IN | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J2 |
| 1 | OUT | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J3 |
| 1 | POWER | Connector_Molex:Molex_KK-254_AE-6410-05A_1x05_P2.54mm_Vertical | J1 |
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Questions
How big is the Current dr amp PCB?
It measures 100 × 90 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Current dr amp use?
83 parts, built around the OPA1611AID, OPA1641AID, BCM62B and BC807. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Current dr amp KiCad files?
From the werediver/current-dr-amp repository on GitHub, at the commit this page was made from: the board is KiCad/current-dr-amp/current-dr-amp.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Current dr amp design in my own project?
Its repository states no licence, so its author keeps all rights: ask werediver before reusing the design.