SKYWORKS UG232 Si88xxxISO-EVB User Guide
- June 6, 2024
- SKYWORKS
Table of Contents
SKYWORKS UG232 Si88xxxISO-EVB
Hardware Overview and Setup
Power the EVB by applying a 3.0 to 5.5 V dc supply to terminal block J1. The isolated output is available at terminal block J2. Test points for these are available at the upper edge of the EVB. The default EVB configuration has the header JP13 shorted, so the dc-dc output powers the VDDB supply (U1 pin 19) of the Si88241ED-IS. The acceptable input voltage to the VDDB supply pin is 3.0 to 5.5 V. If the user chooses to generate an output voltage outside this voltage range, the jumper at JP13 must be removed and a separate supply source connected to VDDB through JP13.
To measure input supply current, clip a differential probe across JP12 to access each side of sense resistor R20. The SH input (U1 pin 7) disables the dc-dc converter function. Install a jumper across JP9 to pull the SH input high and disable the dc-dc converter. If interfacing to an external controller board through the JP9 header, the controller must drive SH low for normal operation and high to disable the dc-dc. The EVB has a series of headers for connecting to each digital channel. The inside conductor of each 2×1 header is connected to the device pin and the outer conductor is tied to ground through a protection resistor. Connect to each side of the Si88xxxISO-EVB to external controllers through a two-row ribbon cables with one row grounded.
Si88xxxISO-EVB Schematics
Si88xxxISO-EVB Layout
Bill of Materials
| Part Reference | Description | Mfr | Mfr Part Number |
|---|---|---|---|
| C1 C2 C10 | CAP, 10 µF, 10 V, ±10%, X7R, 1206 | Venkel | C1206X7R100-106K |
| C3 C5 C9 C12 | CAP, 0.1 µF, 10 V, ±10%, X7R, 0603 | Venkel | C0603X7R100-104K |
| C8 | CAP, 100 pF, 50 V, ±10%, X7R, 0603 | Venkel | C0603X7R500-101K |
| C11 | CAP, 1.5 nF, 16 V, ±10%, X7R, 0603 | Venkel | C0603X7R160-152K |
| D1 | DIO, FAST, 40 V, 1.0A, SOD-128 | Panasonic | DB2440100L |
| D20 | DIO, ZENER, 5.6 V, 500 mW, SOD123 | On Semi | MMSZ5232BT1 |
| D21 D22 | LED, RED, 631 nM, 20 mA, 2 V, 54mcd, 0603 | Lite-On | LTST-C190KRKT |
| J1 J2 | CONN, TERM BLOCK 2POS, 5MM PCB | Phoenix Contact | 1729018 |
| JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9 JP10 JP11 JP12 JP13 | Header, 2×1, 0.1in | ||
| pitch, Tin Plated | Samtec | TSW-102-07-T-S | |
| JS1 JS2 | Shunt, 1×2, 0.1in pitch, Tin plating | Samtec | SNT-100-BK-T |
| MH1 MH2 MH3 MH4 | HDW, Screw, 4-40 x 1/4″ Pan Head, Slotted, Ny- lon | Richco | |
| Plastic Co | NSS-4-4-01 | ||
| R5 R7 | RES, 49.9K, 1/10W, ±1%, ThickFilm, 0603 | Venkel | CR0603-10W-4992F |
| R6 | RES, 13.3K, 1/16W, ±1%, ThickFilm, 0603 | Venkel | CR0603-16W-1332F |
| R8 | RES, 100 Ω, 1/16W, ±1%, ThickFilm, 0603 | Venkel | CR0603-16W-1000F |
| R20 | RES, 0.25 Ω, 1/2W, ±1%, ThickFilm, 1206 | Venkel | LCR1206-R250J |
| R21 R22 R23 | RES, 10K, 1/10W, ±5%, ThickFilm, 0603 | Venkel | CR0603-10W-103J |
| R24 R25 R26 R27 R28 R29 R30 R31 | RES, 499 Ω, 1/10W, ±1%, ThickFilm, 0603 | ||
| Venkel | CR0603-10W-4990F | ||
| SO1 SO2 SO3 SO4 | HDW, STANDOFF, 1/4″ HEX, 4-40×3/4″, NYLON | Keystone | 1902D |
| T1 | TRANSFORMER, POWER, FLYBACK, 2.0 µH PRIMARY, 100 nH LEAKAGE, 1:4, 1 TAP, | ||
| SMT | UMEC | UTB02185S |
TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9
TP10
| TESTPOINT, BLACK, PTH| Kobiconn| 151-203-RC
U1| IC, ISOLATOR, DC DC Internal Switch, SH, 4 Digital Ch, SO20 WB| Skyworks|
Si88241ED-IS
Ordering Guide
| Ordering Part Number (OPN) | Description |
|---|---|
| Si88xxxISO-KIT | Si88xxx dc-dc digital isolator evaluation board kit |
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