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PDF ( 数据手册 , 数据表 ) TEA1723FT

零件编号 TEA1723FT
描述 HV start-up flyback controller
制造商 NXP Semiconductors
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TEA1723FT 数据手册, 描述, 功能
TEA1723FT
HV start-up flyback controller with integrated MOSFET for
11 W applications, 1750 Hz burst frequency
Rev. 2.1 — 7 June 2012
Product data sheet
1. Product profile
1.1 General description
The TEA1723 is a small and low cost module Switched Mode Power Supply (SMPS)
controller IC for power applications (up to 11 W) and operates directly from the rectified
universal mains input. The device includes a high voltage power switch (700 V) and has
been optimized for flyback converter topologies to provide high-efficiency over the entire
load range with ultra-low power consumption in the no-load condition. It provides a circuit
for start-up directly from the rectified mains voltage without any external bleeder circuits.
The converter operates as a regulated voltage source from no-load up to the maximum
output current and operates as current source that delivers the maximum current over a
broad output voltage range. Using the TEA1723, a low power converter can be built at
minimum cost and with the minimum number of external components.
The controller regulates the output voltage with primary-side sensing which eliminates the
need for an additional secondary feedback circuitry and simplifies the design. At higher
power levels, a frequency and current control mode is used. It operates with burst mode
control at low power levels and no-load condition. The burst mode minimizes audible
noise and provides an energy saver state which reduces the power consumption in
no-load condition. The Burst mode frequency of 1750 Hz enables no-load power
consumption < 53 mW at 230 V (AC) mains input.
1.2 Features and benefits
Power features:
Low power SMPS controller with integrated power switch designed for applications up
to 11 W
700 V high voltage power switch for global mains operation
Primary sensing for control of the output voltage without optocoupler and secondary
feedback circuitry
Minimizes audible noise in all operation modes
Energy Star 2.0 compliant
Jitter function for reduced EMI







TEA1723FT pdf, 数据表
NXP Semiconductors
TEA1723FT
HV start-up flyback controller with integrated MOSFET for 11 W
8. Characteristics
Table 5. Characteristics
VCC = 20 V; VFB = 0 V; Rsource = 0.75 ; 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
ICC(startup)17V
ICC(energysave)
start-up supply current
start-up supply current
supply current in
energy save
VCC = 0 V
VCC = VCC(startup)
VFB = 2.8 V, non-switching
-1.6 -1.2 -0.8 mA
-1.6 -0.7 -0.2 mA
90 130 170 µA
ICC(50kHz)
supply current at
50 kHz
in CC mode
530 750 970 µA
VCC(startup)
VCC(stop)
Totp
start-up supply voltage
stop supply voltage undervoltage lockout of IC
overtemperature
protection threshold
temperature on
controller die
15 17 19 V
7.5 8.5 9.5 V
- 150 - °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 in burst mode operation
feedback threshold
voltage
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
1575 1750 1935 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
δmax
jitter sweep frequency
maximum duty cycle
- 200 - Hz
72 75 78 %
TEA1723FT
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2.1 — 7 June 2012
© NXP B.V. 2012. All rights reserved.
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