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L5991D Datasheet(PDF) 2 Page - STMicroelectronics |
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L5991D Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 19 page ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCC Supply Voltage (ICC < 50mA) (*) selflimit V IOUT Output Peak Pulse Current 1.5 A Analog Inputs & Outputs (6,7) -0.3 to 8 V Analog Inputs & Outputs (1,2,3,4,5,15,14, 13, 16) -0.3 to 6 V Ptot Power Dissipation @ Tamb =70 °C (DIP16) @Tamb =50 °C (SO16) 1 0.83 W W Tj Junction Temperature, Operating Range -40 to 150 °C Tstg Storage Temperature, Operating Range -55 to 150 °C (*) maximum package power dissipation limits must be observed THERMAL DATA Symbol Parameter Value Unit Rth j-amb Thermal Resistance Junction -Ambient (DIP16) 80 °C/W Thermal Resistance Junction -Ambient (SO16) 120 °C/W PIN FUNCTIONS N. Name Fun ction 1 SYNC Synchronization. A synchronization pulse terminates the PWM cycle and discharges Ct 2 RCT Oscillator pin for external CT,RA,RB components 3 DC Duty Cycle control 4 VREF 5.0V +/-1.5% reference voltage @ 25 °C 5 VFB Error Amplifier Inverting input 6 COMP Error Amplifier Output 7 SS Soft start pin for external capacitor Css 8VCC Supply for internal ”Signal” circuitry 9VC Supply for Power section 10 OUT High current totem pole output 11 PGND Power ground 12 SGND Signal ground 13 ISEN Current sense 14 DIS Disable. It must never be left floating. TIE to SGND if not used. 15 DC-LIM Connecting this pin to Vref, DC is limited to 50%. If it is left floating or grounded no limitation is imposed 16 ST-BY Standby. Connect a resistor to RCT. Connect to VREF or floating if not used. SYNC RCT DC VREF VFB SS COMP 1 3 2 4 5 6 7 OUT SGND PGND ISEN DIS DC-LIM ST-BY 16 15 14 13 12 10 11 VCC 8VC 9 PIN CONNECTION L5991 - L5991A 2/23 |
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