Power stage 2: LM61460-Q1 15V->+5v 5A sync buck (SPICE-verified 5.02V)
Second power stage. U_BUCK5 = LM61460-Q1 (6A, 42V abs-max synchronous). No KiCad symbol existed, so built one from the TI datasheet (SNVSB70F: 14-pin HTSSOP-1EP + EP, VREF=1.0V) and added it to the project library carrier/CM5IO.kicad_sym as CM5IO:LM61460-Q1. - FB divider R_FBT5 40.2k / R_FBB5 10.0k -> 5.02V (SPICE-confirmed vfb=1.0V=VREF at 5.02V); L5 4.7uH, Cout 2x47u/16V, Cin 2x10u/50V, Cboot 100n+Rboot, RT 31.6k (~400kHz), BIAS->+5v, EN->VIN_PROT - +5v pre-exists in the carrier as a hierarchical net -> exposed via a hierarchical label + a +5v sheet pin on the Power symbol, tied into the root +5v net (a global label would trip same_local_global_label). Netlist confirms the buck now sources Module1 + GPIO headers + USB. - FB pin typed passive (high-Z sense) to clear an analyzer no_driver - build_power.py: register_lm61460(), Device:L, HIER_NETS/emit_hlabel Verify: ERC 133->133 (zero new); analyzer +32 added, 0 regressions; SPICE 12/13 pass, 0 fail (1 benign warn: L5/Cboot mis-grouped as LC). Confirm vs datasheet: RT freq, L saturation >=7A, EP=pad15, EN UVLO. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
noise
@@ -99,7 +99,8 @@ Notes that bit us (don't re-learn the hard way):
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is inherent to the M.2 connector (INFO, not fixable). New tool: `tools/build_ekey.py` (place connector + auto-NC + labels).
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4. **Power sheet** (`carrier/Power.kicad_sch`, generated by `tools/build_power.py`) — staged, **sync + datasheet-built parts** (user choice). **Spec rating fix:** the spec's buck candidates miss its own ≥20V-Vin rule (TPS54424=17V, TPS54560=async) — selecting synchronous ≥30V parts instead (LM61460-class 6A for +5V & +3V3_RF/4A; TPS54202 28V for +3V3_AUX), each verified vs datasheet before commit.
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- **Stage 1 — input protection ✅ DONE.** J_PWR(15V) → D_REV `LM74700-Q1` ideal-diode + Q_REV N-FET (reverse-polarity/-current) → `VIN_PROT`; `SMBJ18A` TVS + 100µF/25V ∥ 10µF/50V bulk; C_VCAP charge-pump cap. Netlist-verified topology; ERC 133→133 (zero new); analyzer 0 regressions. **Confirm vs LM74700-Q1 datasheet:** C_VCAP value, EN-to-+15V_IN, FET pick (Vds≥30V, SOA/inrush) + optional gate R.
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- **Stage 2** U_BUCK5 15→5V 5A → `+5V`. **Stage 3** U_BUCK33R 15→3.3V 4A → `+3V3_RF` (then REMOVE the E-key temp PWR_FLAG; wire buck EN ← CM5 `PCIE_PWR_EN`/106). **Stage 4** U_BUCK33A 15→3.3V 1A → `+3V3_AUX`. SPICE-validate each feedback divider (like the reference U8/AP3441).
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- **Stage 2 — U_BUCK5 15→`+5v` 5A ✅ DONE.** `LM61460-Q1` (6A, 42V absmax sync; **custom symbol built from the datasheet** → `carrier/CM5IO.kicad_sym` as `CM5IO:LM61460-Q1`, fp `Package_SO:Texas_HTSSOP-14-1EP…ThermalVias`). VREF=1.0V → FB divider R_FBT5 40.2k / R_FBB5 10.0k = **5.02V (SPICE-confirmed vfb=1.0V)**. L5 4.7µH, Cout 2×47µF/16V, Cin 2×10µF/50V, Cboot 100n+Rboot 4.7Ω, RT 31.6k(~400kHz), BIAS→+5v, EN→VIN_PROT, PGOOD 100k→+5v. **`+5v` kept HIERARCHICAL** (pre-existing carrier net; global would collide `same_local_global_label`) — Power sheet exposes a `+5v` sheet pin, tied into the root `+5v` net; netlist-verified it drives Module1 + GPIO + USB. ERC 133→133 (zero new); analyzer +32 added **0 regressions**; SPICE 12/13 pass, 1 benign warn (L5/Cboot mis-detected as LC filter). **Confirm vs datasheet:** RT freq, L sat ≥7A, EP=pad15, optional EN UVLO divider.
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- **Stage 3** U_BUCK33R 15→3.3V 4A → `+3V3_RF` (then REMOVE the E-key temp PWR_FLAG; wire buck EN ← CM5 `PCIE_PWR_EN`/106). **Stage 4** U_BUCK33A 15→3.3V 1A → `+3V3_AUX`. SPICE-validate each feedback divider.
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5. **GPS + PPS distribution**: GPS connector (PPS+UART+3V3+GND); PPS → TVS → Schmitt (LVC1G17) →
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fan-out: CM5 `Ethernet_SYNC_OUT` (J2 pin-6 net, 3.3V, no translator) + 2 header taps. SPICE/timing check.
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20515
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20515
carrier/CM5IO.kicad_sym
File diff suppressed because it is too large
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(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "R_FBB5") (unit 1))))
|
||||
)
|
||||
(label "FB5"
|
||||
(at 165.1 153.67 0)
|
||||
(effects (font (size 1.27 1.27)) (justify left))
|
||||
(uuid "7bd1cede-3268-510f-aa19-60cf1d775806")
|
||||
)
|
||||
(symbol
|
||||
(lib_id "power:GND")
|
||||
(at 165.1 161.29 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "f5aebc32-789b-5308-871c-97fbb01397f3")
|
||||
(property "Reference" "#PWRR_FBB52" (at 165.1 164.29 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Value" "GND" (at 165.1 163.29 0) (effects (font (size 1.27 1.27))))
|
||||
(property "Footprint" "" (at 165.1 161.29 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 165.1 161.29 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "e72df74d-103a-556b-b3dd-5cdcb6f9e274"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "#PWRR_FBB52") (unit 1))))
|
||||
)
|
||||
(symbol
|
||||
(lib_id "Device:C")
|
||||
(at 100.33 157.48 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "b0c4a74d-ca82-5493-8537-d69e94d8d861")
|
||||
(property "Reference" "C_VCC5" (at 102.87 156.48 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Value" "1u" (at 102.87 158.48 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Footprint" "Capacitor_SMD:C_0402_1005Metric" (at 100.33 157.48 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 100.33 157.48 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Description" "" (at 100.33 157.48 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "bbff54b9-5ced-55bc-b9d3-0098e4a768c2"))
|
||||
(pin "2" (uuid "36367da5-b7da-5553-96d4-3c889ea92266"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "C_VCC5") (unit 1))))
|
||||
)
|
||||
(label "VCC5"
|
||||
(at 100.33 153.67 0)
|
||||
(effects (font (size 1.27 1.27)) (justify left))
|
||||
(uuid "2af2c2ac-2064-5ffb-ab35-597477fb6077")
|
||||
)
|
||||
(symbol
|
||||
(lib_id "power:GND")
|
||||
(at 100.33 161.29 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "7ad4889b-2560-568c-aff3-5bbe7a4c1ca7")
|
||||
(property "Reference" "#PWRC_VCC52" (at 100.33 164.29 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Value" "GND" (at 100.33 163.29 0) (effects (font (size 1.27 1.27))))
|
||||
(property "Footprint" "" (at 100.33 161.29 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 100.33 161.29 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "004582db-706a-5a26-bc74-5ff28c5bab1c"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "#PWRC_VCC52") (unit 1))))
|
||||
)
|
||||
(symbol
|
||||
(lib_id "Device:C")
|
||||
(at 95.25 144.78 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "cb788cd9-b27d-59f0-8f3c-78ae097be890")
|
||||
(property "Reference" "C_IN5a" (at 97.79 143.78 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Value" "10u/50V" (at 97.79 145.78 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Footprint" "Capacitor_SMD:C_1210_3225Metric" (at 95.25 144.78 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 95.25 144.78 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Description" "" (at 95.25 144.78 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "2c8313c1-74d4-58aa-8123-1a255a1d3d92"))
|
||||
(pin "2" (uuid "0239ef31-8bf8-5e3f-bf07-4dbdec86e3f0"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "C_IN5a") (unit 1))))
|
||||
)
|
||||
(label "VIN_PROT"
|
||||
(at 95.25 140.97 0)
|
||||
(effects (font (size 1.27 1.27)) (justify left))
|
||||
(uuid "1f8f7633-7ccb-5169-ae05-303647391cba")
|
||||
)
|
||||
(symbol
|
||||
(lib_id "power:GND")
|
||||
(at 95.25 148.59 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "c8953dbb-d6ee-5b90-98ea-51420e0daa46")
|
||||
(property "Reference" "#PWRC_IN5a2" (at 95.25 151.59 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Value" "GND" (at 95.25 150.59 0) (effects (font (size 1.27 1.27))))
|
||||
(property "Footprint" "" (at 95.25 148.59 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 95.25 148.59 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "46cedf4f-023b-5db9-b6be-f93e80607683"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "#PWRC_IN5a2") (unit 1))))
|
||||
)
|
||||
(symbol
|
||||
(lib_id "Device:C")
|
||||
(at 100.33 144.78 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "238c20f2-87e3-5eb2-bca4-9c10da2bdfef")
|
||||
(property "Reference" "C_IN5b" (at 102.87 143.78 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Value" "10u/50V" (at 102.87 145.78 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Footprint" "Capacitor_SMD:C_1210_3225Metric" (at 100.33 144.78 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 100.33 144.78 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Description" "" (at 100.33 144.78 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "0d9fab8e-36ce-585c-b603-de13fb820eb3"))
|
||||
(pin "2" (uuid "7be21ee0-7f10-5b13-aae2-a442bc625bee"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "C_IN5b") (unit 1))))
|
||||
)
|
||||
(label "VIN_PROT"
|
||||
(at 100.33 140.97 0)
|
||||
(effects (font (size 1.27 1.27)) (justify left))
|
||||
(uuid "be91b263-8ae5-501a-ae20-c67df882ae18")
|
||||
)
|
||||
(symbol
|
||||
(lib_id "power:GND")
|
||||
(at 100.33 148.59 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "6cf0cfe4-51a6-50c7-8b1f-846c52e4cb13")
|
||||
(property "Reference" "#PWRC_IN5b2" (at 100.33 151.59 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Value" "GND" (at 100.33 150.59 0) (effects (font (size 1.27 1.27))))
|
||||
(property "Footprint" "" (at 100.33 148.59 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 100.33 148.59 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "411d98e4-f020-55af-b3d6-6960ce47e7dc"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "#PWRC_IN5b2") (unit 1))))
|
||||
)
|
||||
(symbol
|
||||
(lib_id "Device:C")
|
||||
(at 175.26 138.43 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "8593b239-c9b1-598f-b0d2-8b84204149ee")
|
||||
(property "Reference" "C_OUT5a" (at 177.79999999999998 137.43 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Value" "47u/16V" (at 177.79999999999998 139.43 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Footprint" "Capacitor_SMD:C_1210_3225Metric" (at 175.26 138.43 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 175.26 138.43 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Description" "" (at 175.26 138.43 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "98a691a6-cfb6-5f28-8297-fc4c607f17dd"))
|
||||
(pin "2" (uuid "a8b3e983-a1fa-5da7-807b-e7b7677ddaaa"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "C_OUT5a") (unit 1))))
|
||||
)
|
||||
(hierarchical_label "+5v"
|
||||
(shape passive)
|
||||
(at 175.26 134.62 0)
|
||||
(effects (font (size 1.27 1.27)) (justify left))
|
||||
(uuid "f666b22b-d9d2-555f-8f1b-5f0e1d98a144")
|
||||
)
|
||||
(symbol
|
||||
(lib_id "power:GND")
|
||||
(at 175.26 142.24 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "b9361e54-0737-51f4-9f0d-3a1fe5b256b7")
|
||||
(property "Reference" "#PWRC_OUT5a2" (at 175.26 145.24 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Value" "GND" (at 175.26 144.24 0) (effects (font (size 1.27 1.27))))
|
||||
(property "Footprint" "" (at 175.26 142.24 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 175.26 142.24 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "e7490cc1-8a64-5ef2-97f8-a36a33982ae3"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "#PWRC_OUT5a2") (unit 1))))
|
||||
)
|
||||
(symbol
|
||||
(lib_id "Device:C")
|
||||
(at 180.34 138.43 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "56b8cdc4-efb6-5bed-8edd-3547eae2ffdf")
|
||||
(property "Reference" "C_OUT5b" (at 182.88 137.43 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Value" "47u/16V" (at 182.88 139.43 0) (effects (font (size 1.27 1.27)) (justify left)))
|
||||
(property "Footprint" "Capacitor_SMD:C_1210_3225Metric" (at 180.34 138.43 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 180.34 138.43 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Description" "" (at 180.34 138.43 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "939b4e50-1889-5cc1-bcf1-330755205961"))
|
||||
(pin "2" (uuid "b80e94ed-02de-555f-992d-5d77ef3b8d39"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "C_OUT5b") (unit 1))))
|
||||
)
|
||||
(hierarchical_label "+5v"
|
||||
(shape passive)
|
||||
(at 180.34 134.62 0)
|
||||
(effects (font (size 1.27 1.27)) (justify left))
|
||||
(uuid "1bba7444-06e4-5ffd-9751-660874caadac")
|
||||
)
|
||||
(symbol
|
||||
(lib_id "power:GND")
|
||||
(at 180.34 142.24 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "2b318152-7c85-558b-a008-2421e50766b8")
|
||||
(property "Reference" "#PWRC_OUT5b2" (at 180.34 145.24 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Value" "GND" (at 180.34 144.24 0) (effects (font (size 1.27 1.27))))
|
||||
(property "Footprint" "" (at 180.34 142.24 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 180.34 142.24 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "191c0e1c-9ee5-5262-a248-5b53330a02b6"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "#PWRC_OUT5b2") (unit 1))))
|
||||
)
|
||||
(symbol
|
||||
(lib_id "power:PWR_FLAG")
|
||||
(at 149.86 142.24 0)
|
||||
(unit 1)
|
||||
(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)
|
||||
(uuid "9fc034bc-7e4a-56da-aae8-b4dab1533968")
|
||||
(property "Reference" "#FLGP5V" (at 149.86 139.24 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Value" "PWR_FLAG" (at 149.86 140.24 0) (effects (font (size 1.27 1.27))))
|
||||
(property "Footprint" "" (at 149.86 142.24 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(property "Datasheet" "" (at 149.86 142.24 0) (effects (font (size 1.27 1.27)) (hide yes)))
|
||||
(pin "1" (uuid "27e0e6b7-4281-5c4d-b9d6-26200e20eae9"))
|
||||
(instances (project "CM5IO" (path "/e63e39d7-6ac0-4ffd-8aa3-1841a4541b55/9c7ccf72-dd3e-5ed3-bb43-2939833eb069" (reference "#FLGP5V") (unit 1))))
|
||||
)
|
||||
(sheet_instances
|
||||
(path "/"
|
||||
(page "5")
|
||||
|
||||
@@ -67,6 +67,42 @@ def add_from(lib_id, srctext, srcname=None):
|
||||
# reuse R/C/C_Polarized/GND verbatim from the carrier (guaranteed compatible)
|
||||
for lid in ["Device:R", "Device:C", "Device:C_Polarized", "power:GND"]:
|
||||
add_from(lid, carrier_hs)
|
||||
add_from("Device:L", open(f"{KSS}/Device.kicad_sym").read(), "L")
|
||||
|
||||
def register_lm61460():
|
||||
"""Hand-authored lib_symbol for LM61460-Q1 (14-pin HTSSOP-1EP + EP=15),
|
||||
built from the datasheet pin table (SNVSB70F). VREF(FB)=1.0V, VIN abs-max 42V.
|
||||
Pin types picked for cross-sheet ERC: VIN/PGND/AGND/BIAS/EP power_in, VCC power_out,
|
||||
SW output, FB/EN input, RT/CBOOT/RBOOT passive, PGOOD open_collector."""
|
||||
P = [('8','VIN1','power_in',-16.51,15.24,0), ('12','VIN2','power_in',-16.51,12.7,0),
|
||||
('7','EN/SYNC','input',-16.51,5.08,0), ('1','BIAS','power_in',-16.51,0,0),
|
||||
('6','RT','passive',-16.51,-7.62,0),
|
||||
('10','SW','output',16.51,15.24,180), ('14','CBOOT','passive',16.51,12.7,180),
|
||||
('13','RBOOT','passive',16.51,10.16,180), ('2','VCC','power_out',16.51,5.08,180),
|
||||
('4','FB','passive',16.51,-2.54,180), ('5','PGOOD','open_collector',16.51,-7.62,180),
|
||||
('9','PGND1','power_in',-7.62,-21.59,90), ('11','PGND2','power_in',-2.54,-21.59,90),
|
||||
('3','AGND','power_in',2.54,-21.59,90), ('15','EP','power_in',7.62,-21.59,90)]
|
||||
pt = ""
|
||||
for num, name, ty, lx, ly, ang in P:
|
||||
pt += (f'\t\t\t(pin {ty} line (at {lx} {ly} {ang}) (length 3.81)\n'
|
||||
f'\t\t\t\t(name "{name}" (effects (font (size 1.27 1.27))))\n'
|
||||
f'\t\t\t\t(number "{num}" (effects (font (size 1.27 1.27))))\n\t\t\t)\n')
|
||||
blk = ('\t(symbol "CM5IO:LM61460-Q1"\n\t\t(pin_names (offset 1.016))\n'
|
||||
'\t\t(exclude_from_sim no)\n\t\t(in_bom yes)\n\t\t(on_board yes)\n'
|
||||
'\t\t(property "Reference" "U" (at 0 22.86 0) (effects (font (size 1.27 1.27))))\n'
|
||||
'\t\t(property "Value" "LM61460-Q1" (at 0 -26.67 0) (effects (font (size 1.27 1.27))))\n'
|
||||
'\t\t(property "Footprint" "Package_SO:Texas_HTSSOP-14-1EP_4.4x5mm_P0.65mm_EP3.4x5mm_Mask3.155x3.255mm_ThermalVias" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))\n'
|
||||
'\t\t(property "Datasheet" "https://www.ti.com/lit/ds/symlink/lm61460-q1.pdf" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))\n'
|
||||
'\t\t(symbol "LM61460-Q1_0_1"\n'
|
||||
'\t\t\t(rectangle (start -12.7 20.32) (end 12.7 -20.32) (stroke (width 0.254) (type default)) (fill (type background)))\n\t\t)\n'
|
||||
f'\t\t(symbol "LM61460-Q1_1_1"\n{pt}\t\t)\n\t)')
|
||||
LIBS["CM5IO:LM61460-Q1"] = (blk, lib_pins(blk))
|
||||
register_lm61460()
|
||||
# +5v pre-exists in the carrier as a HIERARCHICAL net (local + hierarchical labels on the CM5
|
||||
# sheets) -> expose it hierarchically here (a global label collides: same_local_global_label).
|
||||
# +3V3_RF/+3V3_AUX are new nets introduced by this port -> global is fine.
|
||||
GLOBAL_NETS = {"+3V3_RF", "+3V3_AUX"}
|
||||
HIER_NETS = {"+5v"}
|
||||
# from KiCad libs (renamed to full lib_id)
|
||||
add_from("power:PWR_FLAG", open(f"{KSS}/power.kicad_sym").read(), "PWR_FLAG")
|
||||
add_from("Power_Management:LM74700", open(f"{KSS}/Power_Management.kicad_sym").read(), "LM74700")
|
||||
@@ -82,6 +118,9 @@ def emit_label(net, x, y, ang=0):
|
||||
def emit_glabel(net, x, y, ang=0):
|
||||
body.append(f'\t(global_label "{net}"\n\t\t(shape input)\n\t\t(at {x} {y} {ang})\n'
|
||||
f'\t\t(effects (font (size 1.27 1.27)) (justify left))\n\t\t(uuid "{U("gl-"+net+f"-{x}-{y}")}")\n\t)\n')
|
||||
def emit_hlabel(net, x, y, ang=0):
|
||||
body.append(f'\t(hierarchical_label "{net}"\n\t\t(shape passive)\n\t\t(at {x} {y} {ang})\n'
|
||||
f'\t\t(effects (font (size 1.27 1.27)) (justify left))\n\t\t(uuid "{U("hl-"+net+f"-{x}-{y}")}")\n\t)\n')
|
||||
def emit_gnd(x, y, tag):
|
||||
body.append(f'\t(symbol\n\t\t(lib_id "power:GND")\n\t\t(at {x} {y} 0)\n\t\t(unit 1)\n'
|
||||
f'\t\t(exclude_from_sim no) (in_bom yes) (on_board yes) (dnp no)\n\t\t(uuid "{U("gnd-"+tag)}")\n'
|
||||
@@ -121,6 +160,8 @@ def place(lib_id, ref, value, footprint, ox, oy, pin_nets):
|
||||
lx, ly, _ = pins[num]; px, py = round(ox + lx, 2), round(oy - ly, 2)
|
||||
if net == ('gnd',): emit_gnd(px, py, ref + num)
|
||||
elif isinstance(net, tuple) and net[0] == 'global': emit_glabel(net[1], px, py)
|
||||
elif net in GLOBAL_NETS: emit_glabel(net, px, py)
|
||||
elif net in HIER_NETS: emit_hlabel(net, px, py)
|
||||
else: emit_label(net, px, py)
|
||||
return ox, oy
|
||||
|
||||
@@ -144,6 +185,28 @@ def pin_abs(origin, lib_id, num):
|
||||
fx, fy = pin_abs(drev, "Power_Management:LM74700", "6"); emit_flag(fx, fy, "15IN")
|
||||
vx, vy = pin_abs(tvs, "Device:D_TVS", "1"); emit_flag(vx, vy, "VINP")
|
||||
|
||||
# ---- STAGE 2: U_BUCK5 15V -> +5v 5A (LM61460-Q1, sync, 42V absmax) --------------
|
||||
# FB divider: Vout = VREF*(1+Rfbt/Rfbb), VREF=1.0V -> Rfbt/Rfbb=4 -> 40.2k/10.0k = 5.02V.
|
||||
# fsw ~= 400kHz (RT 31.6k); L=4.7uH; Cout 2x47u/16V; Cin 2x10u/50V; Cboot 100n; BIAS->+5v.
|
||||
place("CM5IO:LM61460-Q1", "U_BUCK5", "LM61460-Q1", "Package_SO:Texas_HTSSOP-14-1EP_4.4x5mm_P0.65mm_EP3.4x5mm_Mask3.155x3.255mm_ThermalVias",
|
||||
110, 150, {'8': 'VIN_PROT', '12': 'VIN_PROT', '7': 'VIN_PROT', '1': '+5v', '2': 'VCC5',
|
||||
'6': 'RT5', '5': 'PG5', '4': 'FB5', '10': 'SW5', '14': 'BOOT5', '13': 'RBOOT5',
|
||||
'9': GND, '11': GND, '3': GND, '15': GND})
|
||||
l5 = place("Device:L", "L5", "4.7uH/7A", "Inductor_SMD:L_Bourns_SRP1245A", 150, 138, {'1': 'SW5', '2': '+5v'})
|
||||
place("Device:C", "C_BOOT5", "100n", "Capacitor_SMD:C_0402_1005Metric", 140, 132, {'1': 'SW5', '2': 'BOOT5'})
|
||||
place("Device:R", "R_BOOT5", "4.7", "Resistor_SMD:R_0402_1005Metric", 145, 128, {'1': 'RBOOT5', '2': 'BOOT5'})
|
||||
place("Device:R", "R_RT5", "31.6k", "Resistor_SMD:R_0402_1005Metric", 90, 158, {'1': 'RT5', '2': GND})
|
||||
place("Device:R", "R_PG5", "100k", "Resistor_SMD:R_0402_1005Metric", 135, 143, {'1': 'PG5', '2': '+5v'})
|
||||
place("Device:R", "R_FBT5", "40.2k", "Resistor_SMD:R_0402_1005Metric", 165, 150, {'1': '+5v', '2': 'FB5'})
|
||||
place("Device:R", "R_FBB5", "10.0k", "Resistor_SMD:R_0402_1005Metric", 165, 158, {'1': 'FB5', '2': GND})
|
||||
place("Device:C", "C_VCC5", "1u", "Capacitor_SMD:C_0402_1005Metric", 100, 158, {'1': 'VCC5', '2': GND})
|
||||
place("Device:C", "C_IN5a", "10u/50V", "Capacitor_SMD:C_1210_3225Metric", 95, 145, {'1': 'VIN_PROT', '2': GND})
|
||||
place("Device:C", "C_IN5b", "10u/50V", "Capacitor_SMD:C_1210_3225Metric", 100, 145, {'1': 'VIN_PROT', '2': GND})
|
||||
place("Device:C", "C_OUT5a", "47u/16V", "Capacitor_SMD:C_1210_3225Metric", 175, 138, {'1': '+5v', '2': GND})
|
||||
place("Device:C", "C_OUT5b", "47u/16V", "Capacitor_SMD:C_1210_3225Metric", 180, 138, {'1': '+5v', '2': GND})
|
||||
# +5v is now sourced by this buck -> PWR_FLAG co-located on L5 pin2 (+5v)
|
||||
p5x, p5y = pin_abs(l5, "Device:L", "2"); emit_flag(p5x, p5y, "P5V")
|
||||
|
||||
# ---- file scaffold ----------------------------------------------------------------
|
||||
libsyms = "\n".join(blk for blk, _ in LIBS.values())
|
||||
sheet = ('(kicad_sch\n\t(version 20231120)\n\t(generator "eeschema")\n\t(generator_version "8.0")\n'
|
||||
|
||||
Reference in New Issue
Block a user