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HIP6005BCV Datasheet(PDF) 4 Page - Intersil Corporation |
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HIP6005BCV Datasheet(HTML) 4 Page - Intersil Corporation |
4 / 11 page 2-113 Functional Pin Description VSEN (Pin 1) This pin is connected to the converters output voltage. The PGOOD and OVP comparator circuits use this signal to report output voltage status and for overvoltage protection. OCSET (Pin 2) Connect a resistor (ROCSET) from this pin to the drain of the upper MOSFET. ROCSET, an internal 200µA current source (IOCS), and the upper MOSFET on-resistance (rDS(ON)) set the converter over-current (OC) trip point according to the following equation: An over-current trip cycles the soft-start function. SS (Pin 3) Connect a capacitor from this pin to ground. This capacitor, along with an internal 10 µA current source, sets the soft-start interval of the converter. VID0-4 (Pins 4-8) VID0-4 are the input pins to the 5-bit DAC. The states of these five pins program the internal voltage reference (DACOUT). The level of DACOUT sets the converter output voltage. It also sets the PGOOD and OVP thresholds. Table 1 specifies DACOUT for the 32 combinations of DAC inputs. COMP (Pin 9) and FB (Pin 10) COMP and FB are the available external pins of the error amplifier. The FB pin is the inverting input of the error amplifier and the COMP pin is the error amplifier output. These pins are used to compensate the voltage-control feedback loop of the converter. GND (Pin 11) Signal ground for the IC. All voltage levels are measured with respect to this pin. PGOOD (Pin 12) PGOOD is an open collector output used to indicate the status of the converter output voltage. This pin is pulled low when the converter output is not within ±10% of the DACOUT reference voltage. Exception to this behavior is the ‘11111’ VID pin combination which disables the converter; in this case PGOOD asserts a high level. PHASE (Pin 13) Connect the PHASE pin to the upper MOSFET source. This pin is used to monitor the voltage drop across the MOSFET for over-current protection. This pin also provides the return path for the upper gate drive. UGATE (Pin 14) Connect UGATE to the upper MOSFET gate. This pin provides the gate drive for the upper MOSFET. Typical Performance Curves FIGURE 1. RT RESISTANCE vs FREQUENCY FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY 10 100 1000 SWITCHING FREQUENCY (kHz) 10 100 1000 RT PULLUP RT PULLDOWN TO VSS TO +12V 100 200 300 400 500 600 700 800 900 1000 40 35 30 25 20 15 10 5 0 SWITCHING FREQUENCY (kHz) CUGATE = 3300pF CUGATE = 1000pF CUGATE = 10pF 11 12 13 14 15 16 17 18 20 19 10 9 8 7 6 5 4 3 2 1 VSEN OCSET SS VID0 VID1 VID2 VID4 VID3 COMP FB RT VCC NC NC OVP BOOT UGATE PHASE PGOOD GND I PEAK I OCSET xROCSET r DS ON () ----------------------------------------------------- = HIP6005B |
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