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TEA1738T Folha de dados(PDF) 8 Page - NXP Semiconductors

Nome de Peças TEA1738T
Descrição Electrónicos  GreenChip SMPS control IC Adjustable overpower time-out
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Fabricante Electrônico  NXP [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo NXP - NXP Semiconductors

TEA1738T Folha de dados(HTML) 8 Page - NXP Semiconductors

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TEA1738T_TEA1738LT
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Preliminary data sheet
Rev. 1 — 31 December 2010
8 of 21
NXP Semiconductors
TEA1738T; TEA1738LT
GreenChip SMPS control IC
In the TEA1738T when the Vprot(OPTIMER) voltage is reached the device is restarted. The
TEA1738LT is latched in an off state when the Vprot(OPTIMER) voltage is reached.
7.10 Current mode control (ISENSE pin)
Current mode control is used for its good line regulation.
The primary current is sensed by the ISENSE pin across external resistor R9
(see Figure 3) and compared with an internal control voltage. The internal control voltage
is proportional to the CTRL pin voltage (see Figure 7).
Fig 5.
Overpower delay (TEA1738T)
Fig 6.
Overpower delay: latched (TEA1738LT)
014aaa930
VOPTIMER
VISENSE
VO
400 mV
protection
high load
high load
normal
load
Vprot(OPTIMER)
IO
014aaa968
VOPTIMER
VISENSE
VO
400 mV
protection
high load
high load
normal
load
Vprot(OPTIMER)
IO


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