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CS3972YT5 Datasheet(PDF) 3 Page - Cherry Semiconductor Corporation |
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CS3972YT5 Datasheet(HTML) 3 Page - Cherry Semiconductor Corporation |
3 / 6 page 3 Package Pin Description PACKAGE PIN # PIN SYMBOL FUNCTION Typical Performance Characteristics 1.274 1.264 1.254 1.244 1.234 1.224 1.214 -50 -25 -0 25 50 75 100 125 150 Temperature (°C) Reference Voltage vs. Temperature 47 45 43 41 39 37 33 -50 -25 -0 25 50 75 100 125 150 Temperature (°C) 35 Switching Frequency vs. Temperature 100 90 80 70 60 50 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 Switch Current (A) 10 40 30 20 1.8 2.0 Driver Current vs. Switch Current 97 96 95 93 92 91 90 -50 -25 -0 25 50 75 100 125 150 Junction Temperature (°C) Maximum Duty Cycle 1.6 1.4 1.2 1.0 0.8 0.6 0 0 0.50 1.00 1.25 1.75 Switch Current (A) 0.4 0.2 2.0 0.25 0.75 1.50 Tj=25°C Switch Saturation Voltage 16L 5L 8L SO Wide TO-220 PDIP 16 3 1 Gnd Logic and power ground on TO-220. Logic ground only on 8L PDIP. 21 2 VC Control voltage can be used for frequency compensation, cur- rent limit threshold, frequency synchronization, and soft start. 32 3 VFB Feedback voltage is the negative input to the error amplifier. 1,4,5,6,7,8, 4 NC No connection. 10,12,15 95 5 VIN Supply input voltage with a range of 3V to 60V. 11 6 E1 Emitter One is a power ground which should always be con- nected to logic ground since it is used as the negative input to the current sense amp. 13 4 7 VSW Collector of internal 75V NPN power switch. 14 8 E2 Emitter Two is a power ground which can be left disconnected to reduce the switch rating to 625mA. |
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