tea1752t NXP Semiconductors, tea1752t Datasheet - Page 18

• Manufacturer Part Number: tea1752t
• Description: Greenchip Iii Smps Control Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TEA1752T_LT
Product data sheet
7.3.6 Soft start-up (pin FBSENSE)
To prevent audible transformer noise during start-up, the transformer peak current is
slowly increased by the soft start function. This can be achieved by inserting a resistor
(R
Fig 12. Time-out protection circuit
Fig 13. Time-out protection (signals), safe restart in the TEA1752T
Fig 14. Time-out protection (signals), latched in the TEA1752LT
SS2
) and a capacitor (C
V
V
FBCTRL
FBCTRL
time-out
voltage
voltage
output
output
All information provided in this document is subject to legal disclaimers.
Rev. 02 — 24 June 2010
SS2
4.5 V
intended output
intended output
reached within
reached within
) between pin 10 (FBSENSE) and the current sense resistor.
time−out time.
time-out time.
voltage not
voltage not
2.5 V
TEA1752T; TEA1752LT
3.5 V
3 kΩ
latched
restart
30 μA
intended output voltage
reached within time-out
FBCTRL
GreenChip III SMPS control IC
time.
4.5 V
2.5 V
4.5 V
2.5 V
014aaa049
014aaa050
014aaa298
© NXP B.V. 2010. All rights reserved.
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