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SEA05L Datasheet(PDF) 5 Page - STMicroelectronics |
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SEA05L Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 12 page SEA05L Operation Doc ID 18462 Rev 1 5/12 Table 5. Electrical characteristics (–25 C° < Tj < 125 °C, VCC = 20 V; unless otherwise specified) Symbol Parameter Test condition Min. Typ. Max. Unit Device supply VCC Voltage operating range 3.5 36 V ICC Quiescent current (Ictrl = Vsense = 0, OUT = open) 250 500 µA Voltage control loop op-amp Gmv Transconductance (sink current only)(1) 13.5 S Vctrl Voltage reference default value(2) Tj = 25 °C 2.488 2.5 2.512 V Ibias Inverting input bias current 25 nA Current control loop Gmi Transconductance (sink current only) (3) 1.5 7 S Vcsth Current sense threshold at I(Iout) = 1 mA(4) 48 50 52 mV Ibias Non-inverting input source current 6 µA Output stage VOUTlow Low output level at 2 mA sink current 200 400 mV LED driver ILD LED driver sink current capability (peak) 10 mA fLD LED driver current modulation frequency 0.6 1 1.4 kHz VLDlow Low output level at 5 mA sink current (internal mosfet on) 450 900 mV ILD_LKG LED driver leakage current (internal mosfet off) 0.5 µA 1. If the voltage on Vctrl (the negative input of the amplifier) is higher than the positive amplifier input, and it is increased by 1mV, the sinking current at the output OUT will be increased by 3.5 mA. 2. The internal voltage reference is set at 2.5 V. The voltage control loop precision takes into account the cumulative effects of the internal voltage reference deviation as well as the input offset voltage of the transconductance operational amplifier. The internal voltage reference is fixed by bandgap, and trimmed to 0.48 % accuracy at room temperature. 3. When the inverting input at Isense is greater than 50 mV, and the voltage is increased by 1 mV, the sinking current at the output Out will be increased by 7 mA. 4. The internal current sense threshold is triggered when the voltage on pin Isense is 50 mV. The current control loop precision takes into account the cumulative effects of the internal voltage reference deviation as well as the input offset voltage of the transconductance operational amplifier. |
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