EFVH035ADA471M10B0
470 uF 35V aluminum electrolytic capacitor, +15V input-bus bulk and LDO output/protection-stage decoupling — FOLLON — C22387780 — board-b C5 (fitted), C7 (fitted), C12 (fitted), C21 (fitted), C24 (fitted), C25 (fitted) — rec-c22387780
Generated from the component evidence records — edit the records, not this page.
Everything below is projected from this project's stored component evidence. Values keep the exact wording, conditions, units and verdicts they were recorded with — nothing here is re-typed, corrected, or combined into an overall judgement about the part.
This record in the catalog: EFVH035ADA471M10B0
Identity
| Field | Recorded value |
|---|---|
| Record ID | rec-c22387780 |
| Record kind | standalone |
| Manufacturer part number | EFVH035ADA471M10B0 |
| Manufacturer | FOLLON |
| Function | 470 uF 35V aluminum electrolytic capacitor, +15V input-bus bulk and LDO output/protection-stage decoupling |
| LCSC ID | C22387780 |
| Package | CAP-SMD_BD10.0-L10.3-W10.3-LS11.0-FD |
| Inventory line | line-c22387780 |
| Also known as | electrolytic capacitor |
Fit: Fitted
Identity state: VERIFIED
Source state: AVAILABLE
Coverage: 1 open of 4 published
Documents and package
Footprint preview
CAP-SMD_BD10.0-L10.3-W10.3-LS11.0-FD. Open SVGPackage model
Interactive inspection requires JavaScript and WebGL. The package identity remains available in this page.
This geometry represents a shared footprint package and may not exactly match the manufacturer part.
Datasheet PDF — FOLLON EFVH035ADA471M10B0 aluminum electrolytic capacitor datasheet (LCSC-hosted)
Selected source ID: src-c22387780-datasheet
Authority: MANUFACTURER_PRIMARY
Availability: AVAILABLE
Package footprint: CAP-SMD_BD10.0-L10.3-W10.3-LS11.0-FD
This geometry represents a shared footprint package and may not exactly match the manufacturer part.
Placements
Every position this exact line occupies in the as-built design. One line may be placed many times and across more than one board.
| Board | Reference designator |
|---|---|
| board-b | C5 |
| board-b | C7 |
| board-b | C12 |
| board-b | C21 |
| board-b | C24 |
| board-b | C25 |
Coverage
Coverage is stated one domain at a time and is never rolled up. A domain marked open is a question that has not been answered; it is not a finding that the part is unsuitable. A record with no open domains has not thereby been declared safe.
electrical-limits
Coverage ID: cov-c22387780-electrical-limits · Status: COVERED
Reason: Capacitance (470uF), tolerance (+/-20%), and rated voltage (35V) are confirmed from the manufacturer datasheet, cross-checked against the LCSC product-detail page.
Facts in this domain:
voltage-rating-vs-rail
Coverage ID: cov-c22387780-rail-margin · Status: COVERED
Reason: 35V rating gives a 21.5V margin on the +-13.5V LDO-input placements (C14/C20/C24) and a 23V margin on the +-12V LDO-output placements (C21/C25).
Facts in this domain:
case-size
Coverage ID: cov-c22387780-case-size · Status: COVERED
Reason: The FVH part-number key decodes EFVH035ADA471M10B0 as Phi 10 x 10.5 mm, and the DIMENSIONS table's 10X10.5 column (A 10.3, B 10.3, C 11.2) matches the assigned CAP-SMD_BD10.0-L10.3-W10.3-LS11.0-FD land. Confirms this line was NOT affected by issue #150 -- 470 uF / 35 V has no Phi 8 case option.
Facts in this domain:
switching-frequency-ripple-current
Coverage ID: cov-c22387780-ripple-esr · Status: OPEN
Reason: The rating is fully sourced: 310 mA rms @120Hz/105C for the 10 x 10.5 case, x1.30 at 10kHz and above, giving 403 mA at 150kHz, with max ESR ~0.45 Ohm derived from tan-delta. This closes the evidence gap issue #155 opened. The domain stays OPEN because applying it shows a problem rather than clearing one: an ESR-ratio split of the review's ~0.77 A originally put C24 at ~408 mA against 403 mA and C11 at ~362 mA against 312 mA, so both -13.5V output caps sat at or over rating. Decision neg-rail-cap-bank adds C12 (a second C22387780) in parallel; on the Vsat-inclusive ~0.807 A basis issue #171 established (fact-lm2596-vsat) the three-can split puts C24 and C12 at ~279 mA = 69.3% of 403 mA each (fact-c22387780-can-ripple-share-3can), clearing the sizing bar with C11 rather than these cans as the binding member. Needs a bench measurement -- issue #155, BB-7.
Facts in this domain:
Blocked by: these facts must be resolved before the domain can close. Each is listed in full under Facts.
Facts
Each fact keeps its value, its unit, the conditions it holds under, where it came from and how far it has been confirmed as separate fields, because they are separate claims. A value without its conditions is not the same fact, and a verdict is about the evidence for the value, not about the part.
ABSOLUTE_MAXIMUM
A never-exceed limit. Reaching it may damage the part; it is not an operating target and there is no margin implied by it.
Fact: fact-c22387780-voltage
Value: 35 · Unit: V
Conditions: rated voltage
Verdict: PASS - primary-source confirmed · Provenance: PRIMARY-SPEC
Evidence: src-c22387780-datasheet — Ratings table, row Rated Voltage
RECOMMENDED_OPERATION
The range the manufacturer intends the part to be used in. Always narrower than the absolute maximum.
Fact: fact-c22387780-temperature
Value: -55 to +105 C · Unit: NONE
Conditions: operating temperature range
Verdict: PASS - primary-source confirmed · Provenance: PRIMARY-SPEC
Evidence: src-c22387780-datasheet — Ratings table, row Operating Temperature Range
GUARANTEED_ELECTRICAL
A parameter the manufacturer guarantees over the stated conditions, usually with minimum, typical and maximum values.
Fact: fact-c22387780-capacitance
Value: 470 · Unit: uF
Conditions: nominal capacitance
Verdict: PASS - primary-source confirmed · Provenance: PRIMARY-SPEC
Evidence: src-c22387780-datasheet — Ratings table, row Capacitance
Fact: fact-c22387780-tolerance
Value: 20 · Unit: %
Conditions: tolerance
Verdict: PASS - primary-source confirmed · Provenance: PRIMARY-SPEC
Evidence: src-c22387780-datasheet — Ratings table, row Tolerance
Fact: fact-c22387780-ripple-120hz
Value: 310 · Unit: mA
Conditions: rated rms ripple current at 120Hz, 105C, for the 10 x 10.5 case at 470 uF / 35 V
Verdict: PASS - primary-source confirmed · Provenance: PRIMARY-SPEC
Evidence: src-c22387780-datasheet — DIMENSIONS & MAXIMUM PERMISSIBLE RIPPLE CURRENT table, row 470/471, WV 35 column, (10 x 10.5) case entry
Fact: fact-c22387780-ripple-freq-multiplier
Value: 1.3 · Unit: NONE
Conditions: ripple-current frequency coefficient for 10kHz and above, Phi4-Phi10 case, 100-3300 uF; the LM2596 switches at 150kHz
Verdict: PASS - primary-source confirmed · Provenance: PRIMARY-SPEC
Evidence: src-c22387780-datasheet — FREQUENCY COEFFICIENT OF ALLOWABLE RIPPLE CURRENT table, Phi4Phi10 / 1003300uF row, 10KHz~ column
Fact: fact-c22387780-ripple-hf-derate
Value: 403 · Unit: mA
Conditions: rated rms ripple current at the project's 150kHz switching frequency, 105C
Verdict: PASS - primary-source confirmed · Provenance: CALCULATED
Evidence: src-c22387780-datasheet — DIMENSIONS & MAXIMUM PERMISSIBLE RIPPLE CURRENT table combined with the FREQUENCY COEFFICIENT table
Fact: fact-c22387780-tan-delta
Value: 0.16 · Unit: NONE
Conditions: maximum dissipation factor at 120Hz, 20C, Phi4-Phi10 case at 35V
Verdict: PASS - primary-source confirmed · Provenance: PRIMARY-SPEC
Evidence: src-c22387780-datasheet — SPECIFICATIONS table, Dissipation Factor (tan d) block, Phi4~Phi10 row, 35 V column
Fact: fact-c22387780-esr-120hz
Value: 0.4515033846578592 · Unit: Ohm
Conditions: maximum ESR at 120Hz, 20C, derived from the specified tan-delta as ESR = tan-delta / (2*pi*f*C); the datasheet prints no ESR row
Verdict: PASS - primary-source confirmed · Provenance: CALCULATED
Evidence: src-c22387780-datasheet — SPECIFICATIONS table rows Dissipation Factor (tan d) and Capacitance Range
PROJECT_STATE
A value this project recorded about how the part is used here — a chosen operating point, a net assignment, or a derived figure. Not a manufacturer specification.
Fact: fact-c22387780-manufacturer
Value: FOLLON · Unit: NONE
Conditions: exact orderable EFVH035ADA471M10B0
Verdict: PASS - primary-source confirmed · Provenance: PRIMARY-SPEC
Evidence: src-c22387780-datasheet — Title block / manufacturer identification, LCSC product-detail page cross-check
Fact: fact-c22387780-margin-ldo-input
Value: 21.5 · Unit: V
Conditions: C14, C20 sit on /DC-DC Conversion/+13.5V OUT (U6 L7812 input, board-b-synth-power.md LDO-stage net table); C24 sits on /DC-DC Conversion/-13.5V OUT (U8 CJ7912 input, same table) -- same 13.5V rail magnitude either polarity. Margin = 35V rating - 13.5V.
Verdict: PASS - primary-source confirmed · Provenance: CALCULATED
Evidence: src-c22387780-boardbdoc — board-b-synth-power.md, LDO-stage net table rows '/DC-DC Conversion/+13.5V OUT' and '/DC-DC Conversion/-13.5V OUT'
Fact: fact-c22387780-margin-ldo-output
Value: 23 · Unit: V
Conditions: C21 sits on Net-(U6-OUT), the +12V LDO output (before PTC1); C25 sits on Net-(U8-OUT), the -12V LDO output (before PTC3) -- same 12V rail magnitude either polarity. Margin = 35V rating - 12V.
Verdict: PASS - primary-source confirmed · Provenance: CALCULATED
Evidence: src-c22387780-boardbdoc — board-b-synth-power.md, LDO-stage net table rows 'Net-(U6-OUT)' and 'Net-(U8-OUT)'
Fact: fact-c22387780-case-size
Value: Phi 10 x 10.5 mm V-chip can. The FVH part-number key decodes EFVH035ADA471M10B0 as diameter code '10' (Phi 10) and height code 'B0' (10.5 mm); the DIMENSIONS table's 10X10.5 column gives A 10.3, B 10.3, C 11.2, P 4.4, L 10.5 +/-0.5. Those match zudo-pd:CAP-SMD_BD10.0-L10.3-W10.3-LS11.0-FD, so this line's BD10.0 land is correct. 470 uF / 35 V is not offered in a Phi 8 case at all (the smallest listed is 10 x 10.5), which is why issue #150's Phi 8 correction applies only to the sibling 25 V line C2983319. · Unit: NONE
Conditions: case size and matching land pattern
Verdict: PASS - primary-source confirmed · Provenance: PRIMARY-SPEC
Evidence: src-c22387780-datasheet — SMD EXPLANATION OF PART NUMBERS (diameter code 15-16, height code 17-18); DIMENSIONS (Unit: mm) table, column 10X10.5
Fact: fact-c22387780-installed-ripple-exceedance
Value: RESIZED, not yet measured. spec-architecture-review.md computes output-cap RMS ripple ~0.807 A at the 0.8 A rated load on '/DC-DC Conversion/-13.5V OUT', now including the LM2596 typical switch saturation voltage (fact-lm2596-vsat, 1.16 V) that issue #171 found missing: D = (13.53 + 0.55) / (15 - 1.16 + 13.53 + 0.55) = 0.5043. HISTORICAL, on the earlier Vsat-free 0.77 A basis: with the as-built two-can bank (C11 || C24) an ESR-ratio split put C11 at ~362 mA against its 312 mA rating (~1.16x over) and C24 at ~408 mA against 403 mA (~1.01x) -- both at or over rating; those two numbers are left on their original basis as the record of what the as-built bank was found doing. Decision neg-rail-cap-bank adds C12 (a second C22387780) in parallel; on the Vsat-inclusive basis the three-can split is C11 ~248 mA = 79.6% of 312 mA and C24 = C12 ~279 mA = 69.3% of 403 mA (fact-c2983319-c11-ripple-share-3can, fact-c22387780-can-ripple-share-3can), so every can still sits inside the 85% sizing bar; at the guaranteed max Vsat (fact-lm2596-vsat-max, 1.5 V over temperature) they reach 80.6% and 70.2%. Caveat unchanged: the split uses 120Hz ESR because neither datasheet publishes ESR at 150kHz; aluminium-electrolytic ESR falls and flattens with frequency, so the absolute values are pessimistic while the RATIO between two same-technology, similar-size cans is the trustworthy part. NEEDS BENCH remains: the installed ripple at C11/C24/C12 is still unmeasured. Tracked as issue #155 and BB-7. · Unit: NONE
Conditions: installed ripple current vs manufacturer-derated ratings; the exceedance figures describe the HISTORICAL as-built two-can bank (C11 and C24, pre-C12) and are stated on the pre-#171 Vsat-free 0.77 A basis they were computed on; the resized three-can figures are the *-3can facts and carry the Vsat-inclusive 0.807 A basis
Verdict: NEEDS BENCH · Provenance: REFERENCE-DESIGN
Evidence: src-c22387780-boardbdoc — spec-architecture-review.md section BB-7, output-cap RMS ripple calculation for the U4 -13.5V rail; evaluated against the ripple and ESR rows of both records (fact-c22387780-ripple-hf-derate, fact-c2983319-ripple-hf-derate, fact-c22387780-esr-120hz, fact-c2983319-esr-120hz)
Fact: fact-c22387780-can-ripple-share-3can
Value: 279.3138241005747 · Unit: mA
Conditions: Per-can share for C24 and C12 (identical parts) of the 0.807 A rms output ripple on '/DC-DC Conversion/-13.5V OUT' after decision neg-rail-cap-bank adds C12, i.e. the three-can bank C11 || C24 || C12 at the 0.8 A rated load. Ripple divides as conductance 1/ESR because ESR dominates each branch at the LM2596's 150 kHz. Against fact-c22387780-ripple-hf-derate (403 mA) this is 69.3%, inside the 85% sizing bar. VSAT-INCLUSIVE BASIS (issue #171 resolved): the expression's bare numbers are D = (13.53 + 0.55) / (15 - 1.16 + 13.53 + 0.55) = 0.5043 and Irms = 0.8 * sqrt(D/(1-D)) = 0.8069 A, where 13.53 V is the U4 setpoint magnitude (fact-lm2596-u4-vout-setpoint-magnitude), 0.55 V the SS34 catch-diode drop (fact-ss34-vf), 15 V the nominal input (fact-lm2596-vin-project), 1.16 V the LM2596 typical switch saturation voltage (fact-lm2596-vsat) and 0.8 A the rated -12V rail load; those four inputs are inlined as constants because the validator scopes depends_on to this bundle. SENSITIVITY at the guaranteed maximum Vsat (fact-lm2596-vsat-max, 1.5 V over temperature; 1.4 V at 25C): Irms rises to 0.817 A and this per-can share to 282.8 mA = 70.2% (281.8 mA = 69.9% at the 25C limit) -- still inside the bar. These 35 V cans are the slack members: C11 binds first at 85%, so the same 120Hz-ESR caveat as the sibling fact applies here with more margin behind it (absolute Ohm values pessimistic, ratio trustworthy).
Verdict: NEEDS BENCH · Provenance: CALCULATED
Evidence: src-c22387780-boardbdoc — calculated from the ESR rows of both records (fact-c2983319-esr-120hz, fact-c22387780-esr-120hz) against the Vsat-inclusive 0.807 A output-cap ripple of spec-architecture-review.md section BB-7; duty-cycle inputs per fact-lm2596-vsat, fact-ss34-vf, fact-lm2596-vin-project and fact-lm2596-u4-vout-setpoint-magnitude; bank membership per board_b_spec.py NETS row '/DC-DC Conversion/-13.5V OUT'
Calculation dependencies
These values were derived from other recorded facts rather than read from a document. The expression and every input are published so the number can be recomputed instead of trusted. A derived value is never stronger than the weakest fact it depends on.
Fact: fact-c22387780-margin-ldo-input
Expression: fact_c22387780_voltage - 13.5
Depends on:
Fact: fact-c22387780-margin-ldo-output
Expression: fact_c22387780_voltage - 12
Depends on:
Fact: fact-c22387780-ripple-hf-derate
Expression: fact_c22387780_ripple_120hz * fact_c22387780_ripple_freq_multiplier
Depends on:
Fact: fact-c22387780-esr-120hz
Expression: fact_
Depends on:
Fact: fact-c22387780-can-ripple-share-3can
Expression: 0.
Depends on:
fact-c2983319-esr-120hzon GVT1E477M0810CNVC
Pin maps
The mapping between schematic pins and PCB pads, or physical terminals for an external part, as recorded. A record may carry more than one map when the same part is documented in more than one context.
pinmap-c22387780
Symbol:
EFVH035ADA471M10B0Footprint:
CAP-SMD_BD10.0-L10.3-W10.3-LS11.0-FDPins: 2
Pin assignments
| Symbol pin | Name | Footprint pad | Function |
|---|---|---|---|
1 | 1 | 1 | terminal 1 (polarity not independently confirmed this pass) |
2 | 2 | 2 | terminal 2 (polarity not independently confirmed this pass) |
Interactions
Behaviour that is not a property of this part alone. Each interaction names the records it spans, the conditions it holds under, and how far it has been confirmed. An interaction that spans several parts appears on every one of their pages, under the same identifier, because it is equally a fact about each.
No interaction is published for this record.
Cross-component rules
Rules that span several parts at once and are published in full on the integration page. Each rule's verdict below is that rule's own — it is a statement about the cross-component question, not about this part — and the exact wording of what the rule refuses to conclude is published with the rule itself.
rule-tvs-clamp-vs-absmax— tvs-clamp-vs-absmax — rule verdict: UNSOURCED
Sources
Every document cited above, with its identification, when it was retrieved, and what kind of authority it carries. Sources that could not be retrieved are listed too, with their unavailability stated, so a gap in the evidence is visible rather than absent.
FOLLON EFVH035ADA471M10B0 aluminum electrolytic capacitor datasheet (LCSC-hosted)
Source ID: src-c22387780-datasheet · Authority: MANUFACTURER_PRIMARY
| Field | Recorded value |
|---|---|
| Document number | EFVH035ADA471M10B0 |
| Revision | retrieved via datasheet.lcsc.com, 2026-08-14 |
| Document date | 2026-08-14 |
| Retrieved | 2026-08-14 |
| Printed page | 1 |
Locator: Manufacturer datasheet PDF (page 1, Ratings/Specifications table), hosted at LCSC's datasheet.lcsc.com PDF host and linked from the LCSC product-detail page for this exact LCSC part number
Availability: AVAILABLE
Document URL: https:
Board B - Synth Power Conversion (zudo-pd design doc)
Source ID: src-c22387780-boardbdoc · Authority: PROJECT_GENERATOR
| Field | Recorded value |
|---|---|
| Document number | board-b-synth-power.md |
| Revision | 2026-07-05 |
| Document date | 2026-07-05 |
| Retrieved | 2026-08-14 |
| Printed page | source |
Locator: Net tables section (DC-DC and LDO sheets), rows for the cited net names
Availability: AVAILABLE
Document URL: https:
Legend
What the recorded terms on this page mean, in ordinary words. The exact terms above are the ones that count; these descriptions explain them and never replace them.
Verdict
| Recorded term | What it means |
|---|---|
NEEDS BENCH | Cannot be settled from documents. It needs measurement on real hardware before it can be relied on. |
PASS - primary-source confirmed | Confirmed against the manufacturer's own document for this exact part. |
Provenance
| Recorded term | What it means |
|---|---|
CALCULATED | Derived arithmetically from other facts listed here. The expression and every input are shown, so the number can be recomputed rather than trusted. |
PRIMARY-SPEC | Taken from the manufacturer's own specification document. |
REFERENCE-DESIGN | Taken from a vendor reference design or application note rather than the device specification. |
Fact class
| Recorded term | What it means |
|---|---|
ABSOLUTE_MAXIMUM | A never-exceed limit. Reaching it may damage the part; it is not an operating target and there is no margin implied by it. |
GUARANTEED_ELECTRICAL | A parameter the manufacturer guarantees over the stated conditions, usually with minimum, typical and maximum values. |
PROJECT_STATE | A value this project recorded about how the part is used here — a chosen operating point, a net assignment, or a derived figure. Not a manufacturer specification. |
RECOMMENDED_OPERATION | The range the manufacturer intends the part to be used in. Always narrower than the absolute maximum. |
Coverage status
| Recorded term | What it means |
|---|---|
COVERED | Every question this domain asks is answered by the facts listed against it. |
OPEN | Unresolved. Open means the question has not been answered, not that the part is unsafe — the reason states what is missing. |
Source availability
| Recorded term | What it means |
|---|---|
AVAILABLE | The document was retrieved and is on record. |
Source authority
| Recorded term | What it means |
|---|---|
MANUFACTURER_PRIMARY | The manufacturer's own document for this exact part. |
PROJECT_GENERATOR | A document this project generated, such as a schematic or netlist export. |
Identity state
| Recorded term | What it means |
|---|---|
VERIFIED | The exact orderable part has been confirmed against a source. |
Source state
| Recorded term | What it means |
|---|---|
AVAILABLE | At least one document backing this line was retrieved. |
Unit
| Recorded term | What it means |
|---|---|
NONE | The value is not a physical quantity, so it carries no unit. Recorded as `NONE`. |
Raw agent resource
This page is generated from a stored evidence bundle and does not restate it. The bundle is the source of truth: where the two ever disagree, the bundle is right and this page is stale.
No owning bundle is identified in the published model.