ZHCSJ07A November 2018 – July 2019 LM25180
ADVANCE INFORMATION for pre-production products; subject to change without notice.
請參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
The required input, output, and performance parameters for this application example are shown in Table 3.
| DESIGN PARAMETER | VALUE |
|---|---|
| Input voltage range (steady state) | 9.5 V to 36 V |
| Output 1 voltage and current | 15 V, 0.2 A |
| Output 2 voltage and current | –7.7 V, –0.2 A |
| Input UVLO thresholds | 9 V on, 7 V off |
| Output voltage regulation | ±2% |
The target full-load efficiency of this LM25180 design is 88% based on a nominal input voltage of 24 V and isolated output voltages of 15 V and –7.7 V sharing a common return. The selected flyback converter components are cited in Table 4, including multi-winding flyback transformer, input and output capacitors, rectifying diodes and flyback converter IC.
| REF DES | QTY | SPECIFICATION | VENDOR | PART NUMBER |
|---|---|---|---|---|
| CIN | 1 | 10 µF, 50 V, X7R, 1210, ceramic | Taiyo Yuden | UMK325AB7106KM-T |
| COUT1 | 1 | 22 µF, 25 V, X7R, 1210, ceramic | TDK | C3225X7R1E226M |
| Murata | GRM32ER71E226KE15L | |||
| Taiyo Yuden | TMK325B7226MM-TR | |||
| COUT2 | 1 | 47 µF, 10 V, X7R, 1210, ceramic | TDK | C3225X7R1A476M |
| Murata | GRM32ER71A476ME15L | |||
| Taiyo Yuden | LMK325B7476MM-TR | |||
| DFLY1 | 1 | Schottky diode, 100 V, 1 A, PowerDI-123 | DFLS1100-7 | Diodes Inc. |
| DFLY2 | 1 | Schottky diode, 60 V, 1 A, PowerDI-123 | DFLS160-7 | Diodes Inc. |
| DCLAMP | 1 | Zener, 24 V, 1 W, PowerDI-123 | DFLZ24-7 | Diodes Inc. |
| DF | 1 | Switching diode, 75 V, 0.3 A, SOD323 | 1N4148WS | Diodes Inc. |
| DOUT1 | 1 | Zener, 18 V, 5%, SOD523 | BZX585-C18 | Nexperia |
| DOUT2 | 1 | Zener, 8.2 V, 2%, SOD523 | BZX585-B8V2 | Nexperia |
| RFB | 1 | 154 kΩ, 1%, 0402 | Std | Std |
| RSET | 1 | 12.1 kΩ, 1%, 0402 | Std | Std |
| RTC | 1 | 200 kΩ, 1%, 0402 | Std | Std |
| RUV1 | 1 | 340 kΩ, 1%, 0603 | Std | Std |
| RUV2 | 1 | 68.1 kΩ, 1%, 0402 | Std | Std |
| T1 | 1 | 30 µH, 2 A, turns ratio 1 : 1: 0.52, 9 × 10 mm, SMT | Coilcraft | YA8916-BLD |
| Würth Electronik | 750317595 | |||
| U1 | 1 | LM25180 PSR flyback converter, VSON-8 | Texas Instruments | LM25180NGUR |