TEA1732CTS

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© NXP Semiconductors N.V. 2014. All rights reserved.

Product data sheet

Rev. 1 — 18 March 2014

8 of 20

NXP Semiconductors

TEA1732CTS

GreenChip SMPS control IC

Leading edge blanking prevents false triggering due to capacitive discharge when

switching on the external power switch (see Figure 9).

7.9 Overvoltage protection (pin ISENSE)

Accurate overvoltage protection can be realized at the ISENSE pin by sensing the

auxiliary voltage. During the primary stroke, diode D4 (see Figure 3) is blocked so that the

converter still works under current mode control. During the secondary stroke, the

ISENSE voltage represents the output voltage via the resistor divider R5 and R3

(see Figure 3). The ISENSE voltage is sampled 2

s after the gate signal drops to avoid

consecutive switching cycles, the IC triggers the latched protection.

7.10 Overvoltage protection (pin VCC)

counter is reset to zero.

Fig 8.

Peak current control

Fig 9.

Leading edge blanking

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