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TEA1721DT 데이터시트(PDF) 8 Page - NXP Semiconductors |
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TEA1721DT 데이터시트(HTML) 8 Page - NXP Semiconductors |
8 / 14 page TEA1721DT All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet Rev. 2.1 — 7 June 2012 8 of 14 NXP Semiconductors TEA1721DT HV start-up flyback controller with integrated MOSFET for 5 W 8. Characteristics Table 5. Characteristics VCC = 20 V; VFB = 0 V; Rsource = 1.5 Ω; Tj-switch = 25 °C; Tj-controller = 25 °C; all voltages referenced to GND, positive currents flow into the IC, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Supply (Pin: VCC) ICC(startup)0V start-up supply current VCC = 0 V -1.6 -1.2 -0.8 mA ICC(startup)17V start-up supply current VCC = VCC(startup) -1.6 -0.7 -0.2 mA ICC(energysave) supply current in energy save VFB = 2.8 V, non-switching 90 130 170 µA ICC(50kHz) supply current at 50 kHz in CC mode 530 750 970 µA VCC(startup) start-up supply voltage 15 17 19 V VCC(stop) stop supply voltage undervoltage lockout of IC 7.5 8.5 9.5 V Totp overtemperature protection threshold temperature on controller die 140 150 160 °C Totp(hys) overtemperature protection temperature hysteresis -50 -°C Feedback (Pin: FB) Vth(ovp)fbck feedback overvoltage protection threshold voltage 3.1 3.2 3.3 V Vref(fbck) feedback reference voltage in CV ode 2.5 2.55 2.6 V Vth(fbck)CV constant voltage mode feedback threshold voltage in burst mode operation 2.35 2.4 2.45 V Vth(det)demag(fb) demagnetization detection voltage level on FB pin 25 50 75 mV Oscillator (Pins: DRAIN and SOURCE) fburst burst frequency burst frequency in CVB mode, without jitter 1145 1270 1395 Hz fjit/fsw jitter frequency to switching frequency ratio in all operation modes except in CVB mode 579% fosc-high oscillator frequency High maximum switching frequency in CV and CC mode, without jitter 48 50.5 53 kHz fosc-low oscillator frequency Low minimum switching frequency in CV and CC mode, without jitter. Switching frequency in CVB mode 21 22.5 24 kHz fsweep jitter sweep frequency In current source operation 150 200 250 Hz δmax maximum duty cycle 72 75 78 % |
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