TEA1721AT Datasheet, PDF (2/14 Pages) NXP Semiconductors – Ultra-low standby SMPS controller with integrated power switch

NXP Semiconductors
TEA1721AT
Ultra-low standby SMPS controller with integrated power switch
Green features:
 Enables no-load power consumption below < 10 mW
 Very low supply current in no-load condition with energy saver mode
 Incorporates a high voltage start-up circuit with zero current consumption under
normal switching operation
 Available in halogen-free and Restriction of Hazardous Substances (RoHS) SO7
package
Protective functions:
 OverVoltage Protection (OVP) on IC supply pin and on Feedback control (FB) pin with
auto-restart
 UnderVoltage LockOut (UVLO) protection on IC supply pin
 OverTemperature Protection (OTP)
 Soft-start by reduced peak current for zero and low output voltage
 Demagnetization protection for guaranteed discontinuous conduction mode operation
 Open and short-circuit protection of the Feedback control (FB) pin
1.3 Applications
 Battery chargers for cellular phones and other low power adapters up to 5 W
 Standby supply for TV and desktop PC
 Power supply for white goods applications
1.4 Quick reference data
Table 1. Quick reference data
Symbol Parameter
Conditions
Power switch (Pin: DRAIN)
R_DSon
drain-source
on-state
resistance
I_ds = 30 mA; T_j = 25 °C
Oscillator (Pins: DRAIN and SOURCE)
f_burst
burst frequency burst frequency in CVB mode,
without jitter
f_osc-high
oscillator
frequency High
maximum switching frequency
in CV and CC mode, without
jitter
Supply (Pin: VCC)
V_CC(startup) start-up supply
voltage
V_CC(stop)
stop supply
voltage
undervoltage lockout of IC
Min Typ Max Unit
-
13.2 -
Ω
390 430 470 Hz
48 50.5 53 kHz
15 17 19 V
7.5 8.5 9.5 V
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.
2 of 14