поискавой системы для электроныых деталей |
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L6910 датащи(PDF) 11 Page - STMicroelectronics |
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L6910 датащи(HTML) 11 Page - STMicroelectronics |
11 / 29 page 11/29 L6910 - L6910A Figure 11. Asymptotic Bode Plot of Converter's Gain 5 15A DEMO BOARD DESCRIPTION The demo board shows the operation of the device in a general purpose application. This evaluation board al- lows voltage adjustability from 0.9V to 5V through the switches S2-S5 according to the reported table when the internal 0.9V reference is used (G1 closed). Output current in excess of 20A can be reached dependently on the kind of mosfet used: up to three SO8 mosfet may be used for both High side and Low side switches. External reference may be used for the regulation simply leaving open G1 and the switches S2-S5. The device may also be disabled with the switch S1. The VCC input rail supplies the device while the power conversion starts from the VIN input rail. The device is also able to operate with a single supply voltage; in this case the jumper G2 has to be closed and a 5V to 12V input can be directly connected to the VIN input. The four layers demo board's copper thickness is of 70 µm in order to minimize conduction losses considering the high current that the circuit is able to deliver.The PGOOD signal is used as a logic level and it's been pulled up to VIN because there's no other appropriate voltage available on the demo board. In case of input voltage higher than 7V (PGOOD Pin Maximum Absolute Rating) a 5V reference is required. Figure 12 shows the demo board's schematic circuit Figure 12. 15A Demo Board Schematic Error Amplifier ωΖ1 ωΖ2 ωP1 ωP2 ωESR R5/R3 Modulator Gain Compensation Network Gain Error Amplifier Closed Loop Gain ωLC ω dB UGATE PHASE LGATE PGND PGOOD VFB SS OSC EAREF VREF R1 GND VCC BOOT C17 C16 C21 C15 VIN GNDIN VCC GNDCC REFIN GNDREFIN +VREF GNDREF R7 R6 C13 Q1-3 Q4-6 D2 C14 G2 OCSET COMP 5 12 15 7 8 1 4 2 13 14 10 11 9 3 6 S2 S1 S4 S5 S3 R10 SR12 SR13 R11 VOUT PWRGD GNDOUT L2 L1 D1 C1-C3 C4- 11 D03IN1513 G1 F1 C19 C18 R5 R3 R8 R2 R9 R4 C20 C22 C12 VOUT S2 Open Open Open Open ON Open Open Open ON Open Open Open ON ON Open Open Open Open ON Open Open Open Open ON Open Open ON ON S3 S4 S5 0.9 1.2 1.5 1.8 2.5 3.3 5.0 |
Аналогичный номер детали - L6910 |
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Аналогичное описание - L6910 |
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