TEA1721AT Datasheet, PDF (8/14 Pages) NXP Semiconductors – Ultra-low standby SMPS controller with integrated power switch

NXP Semiconductors
TEA1721AT
Ultra-low standby SMPS controller with integrated power switch
8. Characteristics
Table 5. Characteristics
V_CC = 20 V; V_FB = 0 V; R_source = 1.5 Ω; T_j-switch = 25 °C; T_j-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)
I_{CC(startup)0V}
I_{CC(startup)17V}
I_{CC(energysave)}
start-up supply current
start-up supply current
supply current in
energy save
V_CC = 0 V
V_CC = V_CC(startup)
V_FB = 2.8 V, non-switching
-
-1.2 -
mA
-
-0.7 -
mA
90 130 170 µA
I_CC(50kHz)
supply current at 50
kHz
530 750 970 µA
V_CC(startup)
V_CC(stop)
V_ovp-VCC
T_otp
start-up supply voltage
stop supply voltage undervoltage lockout of IC
overvoltage protection
voltage level on V_CC
overtemperature
protection threshold
temperature on
controller die
15 17 19 V
7.5 8.5 9.5 V
40 42 44 V
-
150 -
°C
T_otp(hys)
overtemperature
protection temperature
hysteresis
-
50 -
°C
Feedback (Pin: FB)
V_ovp-FB
overvoltage protection
voltage level on
regulated flyback
voltage
3.1 3.2 3.3 V
V_sense(fb)CVB
regulated flyback
sense voltage in CVB
mode
2.5 2.55 2.6 V
V_{sense(fb)CVB_low}
threshold flyback
sense voltage for direct
transition from CVB
mode to CVC mode
due to low output
in burst mode operation
-
2.4 -
V
V_sense(fb)CV
regulated flyback
sense voltage in CV
mode
2.5 2.55 2.6 V
V_{th(det)demag(fb)}
demagnetization
detection voltage level
on FB pin
25 50 75 mV
Oscillator (Pins: DRAIN and SOURCE)
f_burst
burst frequency
burst frequency in CVB mode, without
390 430 470 Hz
jitter
f_jit/f_sw
jitter frequency to
switching frequency
ratio
in all operation modes except in burst
modes
5
7
9
%
TEA1721AT
Preliminary data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 24 January 2012
© NXP B.V. 2012. All rights reserved.
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