Series specification · Digital DC-DC
4815x-420x Digital Power Module
1/4 brick · 48 V nominal bus · 15 V / 420 W nominal output
- Selection input range
- 36–72 V DC
- Nominal output
- 15 V DC
- Rated power
- 420 W
- Source revision
- 2025V2
x characters are series placeholders, not complete order codes. Figures below are transcribed from supplied 2025V2 documents, reviewed on 2026-10-30; they are not independent Jingmu test results or certification. Confirm current specifications, cooling and derating. No original product-file downloads or uploads are offered.
Electrical and environmental specifications
Values retain source units, defaults and grade distinctions. Maximum current, adjusted output voltage, power and temperature limits are not necessarily simultaneously achievable. Typical efficiency is not a guaranteed minimum. Isolation values alone do not establish a safety approval or test duration.
| Parameter | Source specification |
|---|---|
| Input enable *1 · On | RC shorted to −IN |
| Input enable *1 · Off | RC open relative to −IN |
| Transient input | 100Vdc/100ms |
| No-load input current, Vin=28V · Enable on | I_in≤0.13A |
| No-load input current, Vin=28V · Enable off | I_in≤0.03A |
| Minimum input capacitance | 220μF |
| Parameter | Source specification |
|---|---|
| Dielectric withstand · Input–output | 1500Vdc |
| Dielectric withstand · Input–case | 500Vdc |
| Dielectric withstand · Output–case | 500Vdc |
| Insulation resistance · DC500V | 200MΩ |
| Isolation capacitance | 4700pF |
| Parameter | Source specification |
|---|---|
| Output voltage accuracy | ±0.5% |
| Output voltage adjustment *3 | -80%~+10% |
| Line regulation | ±0.5%max |
| Load regulation | ±0.5%max |
| Maximum output current | 28A |
| Dynamic load response, 0% → 100% → 0% | ±3%∙Vout |
| Ripple & noise (full load) | ≤1.3%∙Vout |
| Soft-start time (default) | 30ms±5% |
| Soft-start adjustment | 30ms~10s |
| Short-circuit protection | Hiccup / auto-recovery |
| Overcurrent protection (default) | 110% Io_max / auto-recovery, hiccup |
| Overcurrent adjustment *4 | Adjustable within 0%–110% Io_max |
| Overvoltage protection | 130% · Vo_nom / latched shutdown |
| Minimum output capacitance | 220μF |
| Parameter | Source specification |
|---|---|
| Conversion efficiency (typical) | 95% |
| Switching frequency | 400KHz |
| Storage temperature · I grade | -55℃~+100℃ |
| Storage temperature · M grade | -60℃~+125℃ |
| Operating temperature · I grade | -40℃~+85℃ |
| Operating temperature · M grade | -55℃~+105℃ |
| Overtemperature protection (default) · I grade | +90℃ |
| Overtemperature protection (default) · M grade | +110℃ |
| Overtemperature adjustment *5 | Adjustable within the operating temperature range |
| Output enable *2 | TTL positive / negative logic |
| Relative humidity | 95%RH |
| Weight | ≤90g |
Documented digital functions and construction
- 59.0×37.3×12.7 mm / 2.32×1.67×0.5 in
- PMBus digital interface
- Phase-shifted full bridge with synchronous rectification
- Adaptive-algorithm loop control (source description)
- Input-side enable control
- Output-side enable control
- Runtime parameter configuration
- Operating-data telemetry
- Five-sided metal enclosure
- Soft-start adjustment
- Settings: output voltage, overcurrent threshold, overtemperature threshold and soft-start rise time
- Telemetry: input voltage, output voltage, output current and temperature
- Fault indication
- Power-good indication
- Startup discharge of residual output-capacitor charge (source description; verify sequencing)
Telemetry and configurable thresholds can support repeatable commissioning and fault diagnosis. These are integration benefits, not evidence of universally better efficiency, ripple or transient response than analog designs. Confirm PMBus commands, levels, timing, readback accuracy and firmware for the selected order code.
Source ordering table and enable grades
P / N distinguish positive / negative output-enable logic; I / M distinguish source temperature grades, not certifications. These are source-listed variants, not stock or qualification commitments. Scroll this table horizontally on small screens.
| Source order code | Input (V DC) | Output (V DC) | Power (W) | Case temperature | Output enable logic |
|---|---|---|---|---|---|
| 4815P-420I | 36~72 | 15 | 420 | -40℃~+85℃ | Positive logic |
| 4815P-420M | 36~72 | 15 | 420 | -55℃~+105℃ | Positive logic |
| 4815N-420I | 36~72 | 15 | 420 | -40℃~+85℃ | Negative logic |
| 4815N-420M | 36~72 | 15 | 420 | -55℃~+105℃ | Negative logic |
Pin definitions
Pin numbers and functions do not establish physical orientation, voltage tolerance, pull-ups or timing. Request the current bottom-view drawing and interface electrical specification before connecting a host.
| Pin | Name | Function |
|---|---|---|
| +IN | Positive input | Input positive |
| -IN | Negative input | Input negative |
| RC | Input enable | On: RC shorted to −IN; off: RC floating |
| +OUT | Positive output | Output positive |
| -OUT | Negative output | Output negative |
| 1、2、3、4 | Unused | Not used; leave floating |
| 5 | PMBus_CLK | PMBus clock: parameter read/write |
| 6 | PMB_DAT | PMBus data: parameter read/write |
| 7 | PGOOD | Output-ready indication: high means ready |
| 8 | Unused | Not used; leave floating |
| 9 | PMB_ALT | Fault alert: low indicates a fault |
| 10 | EN | Output enable |
Application and parameter configuration
Input voltage range
Application section: rated input 36~72V; stated outer shutdown range 34~74V. The latter is not a recommended continuous operating or surge range.
Source accuracy note: output accuracy may degrade outside 36~72V. Reconcile any differences with the selection and ordering tables before design.
External input and output capacitors
External minimum input capacitance C_in=220μF. Source calls for low-ESR electrolytics and allowance for capacitance loss at low temperature.
External minimum output capacitance C_out=220μF. Source calls for low-ESR electrolytics and allowance for capacitance loss at low temperature.
Enable control
RC input enable and EN output enable are independent. Input enable must be on before output-side enable can control the output.
Input enable: short RC to −IN to turn on; leave RC open relative to −IN to turn off.
Positive output-enable logic: EN floating or high relative to OUT− = on; low / shorted to OUT− = off. Source-listed codes: 4815P-420I、4815P-420M. Verify any order-code discrepancy above.
Negative output-enable logic: EN floating or low relative to OUT− = on; high = off. Source-listed codes: 4815N-420I、4815N-420M. Verify any order-code discrepancy above.
Programming and monitoring workflow
The supplied application section describes a USB programmer and host monitoring software, online / offline configuration, retained settings and operating-data display. Parameters outside the model's allowed range are rejected. Verify programmer availability, firmware, commands and power-cycle/readback behavior; software and remote/cloud management are not promised as standard inclusions.
Source conditions and confirmation items
- Efficiency, ripple and transient table values lack a complete temperature, cooling, probe / bandwidth and load-slew test matrix. Obtain model-specific conditions before acceptance testing.
- Case-temperature grades are not ambient full-power ratings. Confirm thermal / derating curves, the exact mechanical drawing, pin orientation and capacitor requirements.
- Source maximum output-capacitance field: “Not limited in source; validation required”. No validated upper design limit is provided. Confirm inrush, startup, stability and protection before selecting capacitance.
- Source MTBF statement: 2×10^6h. Prediction method, stress profile and supporting report are not supplied; this is unverified, not a lifetime or reliability guarantee.
*1: See enable control for *1 / *2, and parameter configuration for *3 / *4 / *5.
*2: See enable control for *1 / *2, and parameter configuration for *3 / *4 / *5.
*3: See enable control for *1 / *2, and parameter configuration for *3 / *4 / *5.
*4: See enable control for *1 / *2, and parameter configuration for *3 / *4 / *5.
*5: See enable control for *1 / *2, and parameter configuration for *3 / *4 / *5.
Do not transfer another model's plots to this series. Request original documents and further details by email, not public file downloads.