tea1738t NXP Semiconductors, tea1738t Datasheet - Page 9

• Manufacturer Part Number: tea1738t
• Description: Tea1738t; Tea1738lt Greenchip Smps Control Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TEA1738T_TEA1738LT
Product data sheet
7.11 Overpower or high/low line compensation
Leading edge blanking prevents false triggering due to capacitive discharge when
switching on the external power switch (see
(VINSENSE and ISENSE pins)
The overpower compensation function can be used to realize a maximum output power
which is nearly constant over the full input mains.
The overpower compensation circuit measures the input voltage on the VINSENSE pin
and outputs a proportionally dependent current on the ISENSE pin. The DC voltage
across the soft start resistor limits the maximum peak current on the current sense resistor
(see
At low output power levels the overpower compensation circuit is switched off.
Fig 7.
Fig 8.
Figure
Peak current control
Leading edge blanking
9).
All information provided in this document is subject to legal disclaimers.
V
sense(max)
Rev. 2 — 14 January 2011
(V)
0.6
0.4
0.2
0
0
V
sense(max)
frequency
V
reduction
ISENSE
t
1
leb
frequency
reduction
TEA1738T; TEA1738LT
2
Figure
frequency
increase
8).
3
014aaa932
V
CTRL
GreenChip SMPS control IC
(V)
t
014aab293
4
© NXP B.V. 2011. All rights reserved.
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