TEA1738T 데이터 시트보기 (PDF) - NXP Semiconductors.

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TEA1738T

GreenChip SMPS control IC

NXP Semiconductors. 

NXP Semiconductors

TEA1738T; TEA1738LT

GreenChip SMPS control IC

IO

VO

VISENSE

400 mV

VOPTIMER

high load

normal

load

high load

Vprot(OPTIMER)

protection

Fig 5. Overpower delay (TEA1738T)

014aaa930

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.

IO

VO

VISENSE

400 mV

VOPTIMER

high load

normal

load

high load

Fig 6. Overpower delay: latched (TEA1738LT)

Vprot(OPTIMER)

protection

014aaa968

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).

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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