NTE2644 Silicon NPN Transistor Darlington Features: D High DC Current Gain D Low Saturation Voltage D Zener Diode Included Between Collector and Base Applications: D Micro Motor Drive, Hammer Drive Applications D Switching Applications D Power Amplifier Applications Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Collector - Base Voltage, VCBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 ±10V Collector - Emitter Voltage, VCEO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 ±10V Emitter - Base Voltage, VEBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V Collector Current, IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A Base Current, IB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA Collector Power Dissipation, PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900mW Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55° to +150°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Collector Cutoff Current ICBO VCB = 45V, IE = 0 - - 10 µA Emitter Cutoff Current IEBO VEB = 8V, IC = 0 - - 4 mA 50 60 70 V Collecrtor- Emitter Breakdown Voltage DC Current Gain V(BR)CEO IC = 10mA, IB = 0 hFE VCE = 2V, IC = 1A (Pulsed) 2000 - - Collector- Emitter Saturation Voltage VCE(sat) IC = 1A, IB = 1mA (Pulsed) - - 1.5 V Base- Emitter Saturation Voltage VBE(sat) IC = 1A, IB = 1mA (Pulsed) - - 2.0 V VCE = 2V, IC = 500mA (Pulsed) - 100 - MHz - 20 - pF 8.4 - - mJ Transition Frequency fT Collector Output Capacitance Cob VCB = 10V, IE = 0, f = 1MHz Unclamped Inductive Load Energy ES/B L = 10mH, IC = 1.3A, IB = ±50mA Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit - 0.4 - µs - 4.0 - µs - 0.6 - µs Switching Times Turn - On Time ton Storage Time tstg Fall Time VCC = 30V, IB1 = - IB2 = 1mA, Duty Cycle ≤ 1% tf C B E .323 (8.2) Max .413 (10.5) Min .030 (0.75) Max E C B .100 (2.45) .050 (1.27) Typ .024 (0.6) .200 (5.1) Dia Max .161 (4.1) Max