# CS3817BEO

**CRMICRO** · Audio Amplifiers · HTSSOP-28

CS3817BEO from CRMICRO, in a HTSSOP-28. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | /SD | input | Standby logic input (TTL, levels up to AVCC): it must be held high (VIH ≥ 2 V) for normal operation, pulled low (VIL ≤ 0.8 V) to shut down the outputs, and must not be left floating. |
| 2 | NC | unconnected | No-connect (floating) pin. |
| 3 | LINP | input | Left-channel positive differential audio input; absolute maximum input voltage is -0.3 V to 5.3 V. |
| 4 | LINN | input | Left-channel negative differential audio input; absolute maximum input voltage is -0.3 V to 5.3 V. |
| 5 | NC | unconnected | No-connect (floating) pin. |
| 6 | NC | unconnected | No-connect (floating) pin. |
| 7 | AVCC | power_in | Analog supply input, 8.5 V to 20 V recommended (absolute maximum 22 V). |
| 8 | AGND | power_in | Analog ground, which is connected to the heatsink. |
| 9 | GVDD | power_out | High-side gate-drive voltage output, 5.0 V to 6.8 V (6.2 V typical) at 100 µA load. |
| 10 | NC | unconnected | No-connect (floating) pin. |
| 11 | RINN | input | Right-channel negative differential audio input; absolute maximum input voltage is -0.3 V to 5.3 V. |
| 12 | RINP | input | Right-channel positive differential audio input; absolute maximum input voltage is -0.3 V to 5.3 V. |
| 13 | NC | unconnected | No-connect (floating) pin. |
| 14 | NC | unconnected | No-connect (floating) pin. |
| 15 | PVCCR | power_in | Right-channel power supply input, internally connected to PVCCL; 8.5 V to 20 V recommended. |
| 16 | NC | unconnected | No-connect (floating) pin. |
| 17 | BSPR | input | Bootstrap pin for the right-channel positive high-side output. |
| 18 | OUTPR | output | Right-channel positive class-D PWM output (filterless, no output inductor required). |
| 19 | PGND | power_in | Power ground. |
| 20 | OUTNR | output | Right-channel negative class-D PWM output (filterless, no output inductor required). |
| 21 | BSNR | input | Bootstrap pin for the right-channel negative high-side output. |
| 22 | BSNL | input | Bootstrap pin for the left-channel negative high-side output. |
| 23 | OUTNL | output | Left-channel negative class-D PWM output (filterless, no output inductor required). |
| 24 | PGND | power_in | Power ground. |
| 25 | OUTPL | output | Left-channel positive class-D PWM output (filterless, no output inductor required). |
| 26 | BSPL | input | Bootstrap pin for the left-channel positive high-side output. |
| 27 | NC | unconnected | No-connect (floating) pin. |
| 28 | PVCCL | power_in | Left-channel power supply input, internally connected to PVCCR; 8.5 V to 20 V recommended. |
| 29 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | CRMICRO |
| Package | HTSSOP-28 |
| Category | Amplifiers/Comparators |
| Pins | 29 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (PVCC, AVCC) | PVCC, AVCC | -0.3 |  | 22 | V |  | 4 |
| Input voltage /SD | VIN | -0.3 |  |  | V |  | 4 |
| Input voltage RINN, RINP, LINN, LINP | VIN | -0.3 |  | 5.3 | V |  | 4 |
| Operating ambient temperature | Tamb | -40 |  | 85 | ℃ |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | ℃ |  | 4 |
| Load resistance | R | 3.2 |  |  |  |  | 4 |
| Supply voltage | VCC | 8.5 |  | 20 | V | PVCC, AVCC | 4 |
| High-level input voltage /SD | VIH |  | 2 |  | V |  | 4 |
| Low-level input voltage /SD | VIL |  | 0.8 |  | V |  | 4 |
| Low-level output voltage | VOL |  | 0.8 |  | V | RPULL-UP=100k, VCC=18V | 4 |
| High-level input current /SD | IIH |  | 50 |  | μA | VI=2V, VCC=18V | 4 |
| Low-level input current /SD | IIL |  | 5 |  | μA | VI=0.8V, VCC=18V | 4 |
| Operating temperature | TA | -40 |  | 85 | ℃ |  | 4 |
| Output offset voltage | /VOS/ |  | 1.5 | 15 | mV | VI=0V, VCC=20V, RL=8Ω, TA=25℃ | 5 |
| Gate drive voltage | GVDD | 5 | 6.2 | 6.8 | V | IGVDD=100μA, VCC=20V | 5 |
| Quiescent current | ICC |  | 40 | 70 | mA | /SD=2V, no load, PVCC=20V | 5 |
| Standby current | ICC(SD) |  | 250 | 400 | μA | /SD=0.8V, no load, PVCC=20V | 5 |
| Drain-source on-resistance, upper MOSFET | rDS(ON) |  | 240 |  | mΩ | VCC=12V, IO=500mA, TJ=25℃ | 5 |
| Drain-source on-resistance, lower MOSFET | rDS(ON) |  | 240 |  | mΩ | VCC=12V, IO=500mA, TJ=25℃ | 5 |
| Drain-source on-resistance, total | rDS(ON) |  | 480 |  | mΩ | VCC=12V, IO=500mA, TJ=25℃ | 5 |
| Turn-on time | tON |  | 100 |  | ms | /SD=2V | 5 |
| Turn-off time | tOFF |  | 2 |  | μs | /SD=0.8V | 5 |
| DC detect time | tDCDET |  | 420 |  | ms | V(RINN)=6V, V(RINP)=0V | 5 |
| Quiescent current | ICC |  | 25 | 50 | mA | /SD=2V, no load, PVCC=12V | 5 |
| Standby current | ICC(SD) |  | 200 |  | μA | /SD=0.8V, no load, PVCC=12V | 5 |
| Turn-on time (12V) | tON |  | 100 |  | Ms | /SD=2V, VCC=12V | 5 |
| Turn-off time (12V) | tOFF |  | 2 |  | Μs | /SD=0.8V, VCC=12V | 5 |
| Gate drive voltage (12V) | GVDD | 5 | 6.2 | 6.8 | V | IGVDD=2mA, VCC=12V | 5 |
| Power supply ripple rejection | kSVR |  | -70 |  | dB | 1kHz, 200mVpp ripple, input AC coupled to GND, VCC=20V, RL=8Ω | 6 |
| Output power | PO |  | 15 |  | W | THD+N=10%, f=1kHz, VCC=16V | 6 |
| Total harmonic distortion plus noise | THD+N |  | 0.1 |  | % | VCC=16V, f=1kHz, PO=7.5W (half power) | 6 |
| Output noise voltage | VN |  | 65 |  | μV | 20kHz~22kHz, with filter, VCC=20V | 6 |
| Crosstalk | CT |  | -100 |  | dB | VO=1Vrms, f=1kHz, VCC=20V | 6 |
| Signal-to-noise ratio | SNR |  | 102 |  | dB | maximum output THD+N<1%, f=1kHz, VCC=20V | 6 |
| Oscillation frequency | fOSC | 200 |  | 450 | kHz | VCC=20V | 6 |
| Thermal protection temperature |  |  | 150 |  | ℃ |  | 6 |
| Thermal protection hysteresis |  |  | 20 |  | ℃ |  | 6 |
| Power supply ripple rejection (12V) | kSVR |  | -70 |  | dB | 20Hz~1kHz, 200mVpp ripple, input AC coupled to GND, VCC=12V, RL=8Ω | 6 |
| Output power (12V) | PO |  | 10 |  | W | THD+N=10%, f=1kHz, VCC=13V | 6 |
| Total harmonic distortion plus noise (12V) | THD+N |  | 0.06 |  | % | RL=8Ω, f=1kHz, PO=5W (half power), VCC=12V | 6 |
| Output noise voltage (12V) | VN |  | 65 |  | μV | 20kHz~22kHz, with filter, VCC=12V | 6 |
| Crosstalk (12V) | CT |  | -100 |  | dB | PO=1W, f=1kHz, VCC=12V | 6 |
| Signal-to-noise ratio (12V) | SNR |  | 102 |  | dB | maximum output THD+N<1%, f=1kHz, VCC=12V | 6 |
| Oscillation frequency (12V) | fOSC | 200 |  | 450 | kHz | VCC=12V | 6 |
| Thermal protection temperature (12V) |  |  | 150 |  | ℃ | VCC=12V | 6 |
| Thermal protection hysteresis (12V) |  |  | 20 |  | ℃ | VCC=12V | 6 |

## CAD (KiCad official)

- Symbol: `CS3817BEO`
- Footprint: `Package_SO:TSSOP-28-1EP_4.4x9.7mm_P0.65mm_EP2.85x6.7mm`
- 3D model: HTSSOP-28 (KiCad packages3D, STEP)
- 3D model files: `cs3817beo-etched.step` / `cs3817beo-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cs3817beo.step` / `cs3817beo.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [CRMICRO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590907107984564224) (13 pp, sha256 `f30ec26634698ba0`, retrieved 2026-10-19, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cs3817beo-datasheet.pdf)