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Schematics for Programmable DC-DC Power Supply with I2C Interface
| Reference | Value | Description |
|---|---|---|
| Q1-Q4 | SiR880BDP | 70.6A Id, 80V Vds N-Channel MOSFET, 5.3mOhm Ron, 19.5 nC Qg(typ), PowerPAK-8 |
| Q5,Q8 | SIS413DN | -35A Id, -20V Vds, P-Channel MOSFET, PowerPAK 1212-8 Single |
| Q6,Q7 | MMBT3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, SOT-23 |
| U1 | BQ25758S | I2C Controlled, Bidirectional Buck-Boost Controller, 4.4-26V Input, 3.3-26V Output, 26V |
| U2 | AP2210-3.3 | 300mA, LDO, SOT-23 |
| U3 | 74AHC1G14 | Single Schmitt NOT Gate, Low-Voltage CMOS |
| C1-C4,C6,C7,C11,C12,C14,C15,C22,C25,C37,C48,C49 | 0.1uF | ±10%, ceramic, X7R,±10%, ceramic, X7R, AEC-Q200 Grade 1 |
| C5,C23,C24,C38,C44 | 1uF | ±10%, ceramic, X7R, AEC-Q200 Grade 1 |
| C8,C9,C30,C31,C35,C42,C43 | 4.7uF | ±10%, ceramic, X7R,±10%, ceramic, X7S |
| C10,C13 | 0.47uF | ±10%, ceramic, X7R |
| C18-C20 | 56uF | ±20%, aluminum-polymer, 112mOhm, 125°C, ripple current 833mA |
| C21 | 1nF | ±10%, MLCC, X7R, AEC-Q200 |
| C26,C36,C45 | 100pF | ±10%, ceramic, X7R,±5%, MLCC, C0G, AEC-Q200 |
| C27-C29,C39-C41 | 10uF | ±10%, ceramic, X7R |
| C32-C34 | 47uF | ±20%, aluminum-polymer, 112mOhm, 125°C, ripple current 833mA |
| C46,C47 | 2.2uF | ±10%, ceramic, X7R,±10%, ceramic, X7R, AEC-Q200, Soft Termination |
| D1,D2 | V1FM10-M3/H | Schottky, 1A, 100V, 770mV@1A, 50µA@100V, 95pF@4V, 1MHz, Fast Recovery |
| D3 | SMAJ6.5CA | 400W bidirectional Transient Voltage Suppressor, 6.5Vr, SMA(DO-214AC) |
| D4 | 15A, 12V | Schottky diode, anode on pins 1 and 2 |
| D5 | Red | 6 mcd, 1.9V |
| D6-D9 | Green | 6 mcd, 2V |
| D10 | Yellow | 6 mcd, 2V |
| D11 | Blue | 15 mcd, 2.8V |
| D12 | BZX384C2V4 | 2.4V, 200mW, ±5% |
| F1 | 5A | Resettable fuse, polymeric positive temperature coefficient |
| J1 | +5V | Header, 3(2) position |
| J2 | Vout | 0.200" (5.08mm) Wire to Board Terminal Block Horizontal Through Hole |
| J3 | Digital I/O | Header Connector, 0.100" (2.54mm), Through Hole |
| L1 | 10uH | ±20%, Isat 12A (Irms 7.5A), 30mOhm |
| R1 | 133k | 1%, 0.1W |
| R2 | 3.92k | 1%, 0.1W |
| R3,R26-R29 | 10k | 1%, 0.1W,5%, 0.1W |
| R4 | 3k | 1%, 0.1W |
| R5 | 1M | 0.1%, 0.125W, 25ppm/°C |
| R6 | 105k | 0.1%, 0.125W, 25ppm/°C |
| R7 | 274k | 0.1%, 0.125W, 25ppm/°C |
| R8,R9 | 1.8k | 5%, 0.1W |
| R10-R16 | 0 | 5%, 0.125W,5%, 0.1W |
| R17-R20,R34 | 10 | 1%, 0.1W,1%, 0.75W |
| R23,R24 | 5m | 1%, 1W, Current Sense, Moisture Resistant |
| R25,R37 | 20k | 5%, 0.1W |
| R30-R33,R35,R38 | 1k | 5%, 0.1W |
| R36 | 2.7k | 5%, 0.1W |