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UC2727 Folha de dados(PDF) 3 Page - Texas Instruments |
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UC2727 Folha de dados(HTML) 3 Page - Texas Instruments |
3 / 7 page ELECTRICAL CHARACTERISTICS: PIN DESCRIPTIONS A, B: Signal and power input pins. Connect these pins to the secondary of the transformer driven by UC1726. CLAMP: Analog programming pin for intermediate drive level to be used at turn on or in response to a desatura- tion event. Requires a bypass capacitor to COM. COM: Self generated common for bipolar supply. This pin will be 16.5V below PVCC. DSAT+, DSAT-: Inputs to the desaturation comparator. De- saturation is detected when DSAT+ is greater than DSAT-. ENBL: Negative true enable input. Tie to VCC to disable the chip. Connect to COM to enable the chip. If the ENBL pin is used as the primary input to the chip, connect B to VCC and A to VEE. FRC: Fault Resistor and Capacitor. Programs the dura- tion that OUT will be held at CLAMP potential during a de- saturation event before it is driven fully low. Also sets the period of time that OUT will be held low before allowing it to be driven high again. FRPLY: Fault Reply pin. Open collector output. Normally connected to VEE. When desaturation is detected, the pin opens. OUT: Gate drive output. Connect to gate of IGBT with a series damping resistor greater than 3 ohms. TRC: Timing Resistor and Capacitor. Programs the dura- tion that OUT will be held at CLAMP potential and the pe- riod of time the desaturation comparator will be ignored during the rising edge. VCC: Positive supply voltage. Bypass to COM with a low ESL/ESR 1 µF capacitor. VEE: Negative supply voltage. Bypass to COM with a low ESL/ESR 1 µF capacitor. PVEE: Output driver negative supply. Connect to VEE with a 3.3 ohm resistor and bypass to COM with a low ESL/ESR 1 µF capacitor. PVCC: Output driver positive supply. Connect to VCC with a 3.3 ohm resistor and bypass to COM with a low ESL/ESR 1 µF capacitor. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Power Input Receivers Forward Diode Drop IF = 50mA 0.5 0.65 V IF = 500mA 1.2 2 V VCC Regulator VCC 25 ≤ (VCC - VEE) ≤ 36V,I(COM) ≤ 15mA 15.5 16.5 17.5 V Hysteresis Comparator Input Open Circuit Voltage (Measured with respect to VEE)12 V Input Impedance 100 k Ω Hysteresis 44 47 50 V Enable Input High Level Input Voltage 12 V Low Level Input Voltage 5V Input Bias Current ENBL = COM −460 −900 µA Output Driver Saturation to VCC I(OUT) = -20mA 1.7 2.3 V Saturation to VCC I(OUT) = -500mA 2 2.5 V Saturation to VEE I(OUT) = 20mA 2 3 V Saturation to VEE I(OUT) = 500mA 2.4 3.6 V Unless otherwise stated, these specifications apply for TA = −55°C to 125°C for the UC1727, TA = −40°C to 85°C for the UC2727, TA = 0°C to 70°C for the UC3727, R(TRC) = 54.9k, C(TRC) = 180pF, R(FRC) = 309K, C(FRC) = 200pF, VCC - VEE = 25V, CLAMP = 9V, TA = TJ, and all voltages are measured with respect to COM. UC1727 UC2727 UC3727 See Application Note U-143A "New Chip Pair Provides Isolated Drive for High Voltage IGBTs" 3 |
Nº de peça semelhante - UC2727 |
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Descrição semelhante - UC2727 |
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