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L9820 Datasheet(PDF) 3 Page - STMicroelectronics |
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L9820 Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 6 page PIN FUNCTIONS N. Name Description 1 POWER OUTPUT The device is provided with short circuit protection. 4 POWER SUPPLY Supply voltage input. 5 ENABLE INPUT TTL compatible input. High level on this pin means output current ON. The low level voltage switches off the charge pump, the power stage and the diagnostic output reducing to the minimum value the quiescent current. 7 GROUND This pin must be connected to ground. 8 DIAGNOSTIC FEEDBACK The diagnostic circuit is active in input high level condition. This output detects with Tipically 50 µs delay at Tamb = 25°C the following faults: – Overvoltage condition. – Thermal shutdown. – Short circuit. The power stage current is internally limited at 1.5A. The diagnostic output is active low. The diagnostic delay time allows to avoid spurious diagnosys(i.e.: turn ON overcurrent, overvoltage spikes etc.). ELECTRICAL CHARACTERISTICS (VS = 14.4V, –40 °C≤ Tj ≤ +85°C, unless otherwise specified.) Symbol Parameter Test Condition Min. Typ. Max. Unit VS Operating Supply Voltage 6 25 V Ron On Resistance Input > 2V, Tj = 25 °C Input > 2V, Full T range 0.6 0.8 1.2 Ω Ω Ioff Off State Supply Current Tj < 35 °C Tj = 85 °C 130 300 µA µA Ion On State Supply Current 4 mA VEL Enable Low Level 0.8 V VEH Enable High Level 2 V IE Enable Current 0V < Vi <5V 10 µA Ileakd Diagnostic Output Leakage Current VCC = 5V Diagnostic Output High 10 µA Vsatd Diagnostic Output Saturated Voltage Isink < 3.5mA 0.4 V tdd Diagnostic Delay Time Tj = 25 °C30 µs tdon Output ON Delay Time Tj = 25 °C30 µs tr Output ON Rise Time Tj = 25 °C 100 µs tdoff Output OFF Delay Time Tj = 25 °C80 µs tf Output OFF Fall Time Tj = 25 °C 100 µs Vdon Overvoltage Detection ON 25 V Vdh Overvoltage Hysteresis 2 5 V Idon Overcurrent Detection ON 0.5 1.5 A Tdon Overtemperature Detection ON 150 °C Tdh Overtemperature Hysteresis 25 50 °C L9820 3/6 |
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