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FAN6520BMX Folha de dados(PDF) 2 Page - Fairchild Semiconductor |
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FAN6520BMX Folha de dados(HTML) 2 Page - Fairchild Semiconductor |
2 / 14 page 2 www.fairchildsemi.com FAN6520B Rev. 1.0.3 Pin Configuration FAN6520BM 8-pin SOIC Package Pin Definitions Pin # Pin Name Pin Function Description 1 BOOT Bootstrap Supply Input. Provides a boosted voltage to the high-side MOSFET driver. Connect to bootstrap capacitor and diode as shown in Figure 1. 2 HDRV High Side Gate Drive Output. Connect to the gate of the high-side power MOSFET(s). This pin is also monitored by the adaptive shoot-through protection circuitry to determine when the upper MOSFET has turned off. 3 GND Ground. The signal and power ground for the IC. Tie this pin to the ground island/plane through the lowest impedance connection available. Connect directly to source of low-side MOSFET(s). 4 LDRV Low Side Gate Drive Output. Connect to the gate of the low-side power MOSFET(s). This pin is also monitored by the adaptive shoot-through protection circuitry to determine when the lower MOSFET has turned off. 5 VCC VCC. Provides bias power to the IC and the drive voltage for LDRV. Bypass with a good quality ceramic capacitor (X7R or X5R) as close to this pin as possible. 6FB Feedback. This pin is the inverting input of the internal error amplifier. Use this pin, in combination with the COMP pin, to compensate the voltage-control feedback loop of the converter. 7 COMP/SD COMP/SD. This is a multiplexed pin. During operation, the output of the error amplifier drives this pin. Pulling COMP to a level below 0.8V disables the controller. Disabling the controller causes the oscillator to stop, the HDRV and LDRV outputs to be held low, and the soft-start circuitry to re-arm. Connect a 75k Ω resistor between VCC and COMP/SD pin to pull up. 8SW Switch Node Input. Connect as shown in Figure 1. The SW pin provides return for the high-side bootstrapped driver, is a sense point for the adaptive shoot-thru protection. FAN6520B 1 2 3 4 8 7 6 5 SW COMP/SD FB VCC BOOT HDRV GND LDRV |
Nº de peça semelhante - FAN6520BMX |
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Descrição semelhante - FAN6520BMX |
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