TEA1738T Ver la hoja de datos (PDF) - NXP Semiconductors.

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Fabricante

TEA1738T

GreenChip SMPS control IC

NXP Semiconductors. 

NXP Semiconductors

TEA1738T; TEA1738LT

GreenChip SMPS control IC

0.6

Vsense(max)

(V)

0.4

frequency

increase

frequency

reduction

frequency

reduction

0.2

014aab293

0

04

12

3

VCTRL (V)

Fig 7. Peak current control

Leading edge blanking prevents false triggering due to capacitive discharge when

switching on the external power switch (see Figure 8).

tleb

Vsense(max)

VISENSE

Fig 8. Leading edge blanking

t

014aaa932

7.11 Overpower or high/low line compensation

(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 Figure 9).

At low output power levels the overpower compensation circuit is switched off.

TEA1738T_TEA1738LT

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 2 — 14 January 2011

© NXP B.V. 2011. All rights reserved.

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