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TEA1733AT Datasheet(PDF) 11 Page - NXP Semiconductors |
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TEA1733AT Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 18 page TEA1733AT All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Preliminary data sheet Rev. 2 — 19 November 2010 11 of 18 NXP Semiconductors TEA1733AT GreenChip SMPS control IC IO(PROTECT) output current on pin PROTECT VPROTECT =Vlow(PROTECT) −34 −32 −30 μA VPROTECT =Vhigh(PROTECT) 87 107 127 μA Vclamp(PROTECT) clamp voltage on pin PROTECT II(PROTECT) =200 μA [1] 3.5 4.1 4.7 V Peak current control (pin CTRL) VCTRL voltage on pin CTRL for minimum flyback peak current 1.5 1.8 2.1 V for maximum flyback peak current 3.4 3.9 4.3 V Rint(CTRL) internal resistance on pin CTRL 57 9k Ω IO(CTRL) output current on pin CTRL VCTRL =1.4 V −0.7 −0.5 −0.3 mA VCTRL =3.7 V −0.28 −0.2 −0.12 mA Pulse width modulator fosc oscillator frequency 85.5 91.5 97.5 kHz fmod modulation frequency 210 280 350 Hz Δf mod modulation frequency variation ±4 ±5 ±6kHz δ max maximum duty cycle 68.5 72 79 % Vstart(red)f frequency reduction start voltage pin CTRL 1.5 1.8 2.1 V Vδ(zero) zero duty cycle voltage pin CTRL 1.25 1.55 1.85 V Overpower protection (pin OPTIMER) Vprot(OPTIMER) protection voltage on pin OPTIMER 2.4 2.5 2.6 V Iprot(OPTIMER) protection current on pin OPTIMER no overpower situation 100 150 200 μA overpower situation −12.2 −10.7 −9.2 μA Restart timer (pin OPTIMER) Vrestart(OPTIMER) restart voltage on pin OPTIMER low level 0.8 1.2 1.6 V high level 4.1 4.5 4.9 V Irestart(OPTIMER) restart current on pin OPTIMER charging OPTIMER capacitor −127 −107 −87 μA discharging OPTIMER capacitor −0.1 0 0.1 μA Current sense (pin ISENSE) Vsense(max) maximum sense voltage ΔV/Δt= 50 mV/μs; VVINSENSE =0.78V 0.48 0.51 0.54 V ΔV/Δt = 200 mV/μs; VVINSENSE =0.78V 0.50 0.53 0.56 V Vth(sense)opp overpower protection sense threshold voltage 370 400 430 mV ΔV ISENSE/Δt slope compensation voltage on pin ISENSE ΔV/Δt= 50 mV/μs 2033 46mV/ μs Table 5. Characteristics …continued Tamb =25 °C; VCC = 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into the IC; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit |
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