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TEA1721BT Datasheet(PDF) 2 Page - NXP Semiconductors

Part # TEA1721BT
Description  HV start-up flyback controller with integrated MOSFET for 5 W applications, 905 Hz burst frequency
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

TEA1721BT Datasheet(HTML) 2 Page - NXP Semiconductors

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TEA1721BT
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
2 of 14
NXP Semiconductors
TEA1721BT
HV start-up flyback controller with integrated MOSFET for 5 W
Green features:
Enables no-load power consumption < 20 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)
RDSon
drain-source
on-state
resistance
Ids = 30 mA; Tj = 25 °C
13
15.5
17
Oscillator (Pins: DRAIN and SOURCE)
fburst
burst frequency
burst frequency in CVB mode,
without jitter
815
905
995
Hz
fosc-high
oscillator
frequency High
maximum switching frequency
in CV and CC mode, without
jitter
48
50.5
53
kHz
Supply (Pin: VCC)
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


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