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L6258EA Datasheet(PDF) 9 Page - STMicroelectronics |
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L6258EA Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 32 page L6258EA Block diagram 9/32 ΔTSD-H Shut down hysteresis 25 °C TSD Thermal shutdown 150 °C fosc Triangular oscillator frequency(1) CFREF = 1nF 12.5 15 18.5 KHz TRANSISTORS IDSS Leakage current OFF State 500 μA Rds(on) On resistance ON state 0.6 0.75 W Vf Flywheel diode voltage If =1.0A 1 1.4 V CONTROL LOGIC Vin(H) lnput voltage All Inputs 2 VDD V Vin(L) Input voltage All inputs 0 0.8 V Iin Input current (2) 0 < Vin < 5V -150 +10 μA Idis Disable pin input current -10 +150 μA Vref1/ref2 Reference voltage Operating 0 (3) V Iref Vref terminal input current Vref = 1.25 -2 5 μA FI = Vref/Vsense PWM loop transfer ratio 2 VFS DAC full scale precision Vref = 2.5V I0/I1/I2/I3 = L 1.23 1.34 V Voffset Current loop offset Vref = 2.5V I0/I1/I2/I3 = H -30 +30 mV Vref = 2V I0/I1/I2/I3 = H; Tj = -40 to 125°C -60 +60 mV DAC factor ratio Normalized @ full scale value -2 +2 % SENSE AMPLIFIER Vcm lnput common mode voltage range -0.7 VS+0.7 V Iinp Input bias sense1/sense2 -200 0 μA ERROR AMPLIFIER GV Open loop voltage gain 70 dB SR Output slew rate Open loop 0.2 V/ μs GBW Gain bandwidth product 400 kHz 1. Chopping frequency is twice fosc value. 2. This is true for all the logic inputs except the disable input. 3. If Tj is inside the range -40 to -10°C then Vref max is 2V+0.5V·(Tj + 40°C)/30°C. If Tj is greater than -10°C then Vref max is 2.5V. Table 4. Electrical characteristics (continued) (VS = 40V; VDD = 5V; Tj = 25°; unless otherwise specified.) Parameter Description Test condition Min. Typ. Max. Unit |
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