Datasheet

TEA1721FT All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 1.1 — 7 June 2012 2 of 14
NXP Semiconductors
TEA1721FT
HV start-up flyback controller with integrated MOSFET for 5 W
Green features:
 Enables no-load power consumption < 30 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 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
 Short-circuit protection of the charger output
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 Min Typ Max Unit
Power switch (Pin: DRAIN)
R
DSon
drain-source
on-state
resistance
I
ds
= 30 mA; T
j
= 100 C 13 15.5 17 Ω
Oscillator (Pins: DRAIN and SOURCE)
f
burst
burst frequency burst frequency in CVB mode,
without jitter
1575 1750 1925 Hz
f
osc-high
oscillator
frequency High
maximum switching frequency
in CV and CC mode, without
jitter
48 50.5 53 kHz
Supply (Pin: VCC)
V
CC(startup)
start-up supply
voltage
15 17 19 V
V
CC(stop)
stop supply
voltage
undervoltage lockout of IC 7.5 8.5 9.5 V